JP3617987B2 - Digital information medium, digital information recording method, digital information reproducing method, and digital information reproducing apparatus - Google Patents

Description

  The present invention relates to an apparatus / method capable of real-time digital recording of video images, audio information, etc., and a digital information medium used therefor.

  In particular, a special information storage area is provided on a recordable / reproducible DVD disk (DVD-RAM disk, etc.), and information stored in this area is appropriately used to facilitate reproduction / erasure of a recorded program. The apparatus / method and medium illustrated.

  Currently, MPEG2 (Moving Picture Expert Group 2) system is used for digital recording / playback of video (moving picture), and AC-3 (Digital Audio Compression 3) system is used for digital recording / playback of audio (voice). The DVD video standard is compiled, and various playback devices (DVD video players) using this standard are commercially available.

  According to the MPEG2 system layer, this DVD video standard supports MPEG-2 as a moving picture compression system and AC-3 audio and MPEG audio as a voice recording system in addition to linear PCM. The DVD video standard also supports sub-picture data for subtitles, navigation data for playback control such as fast-forward / rewind data search, and ISO 9660 and UDF bridge formats for computers.

  Further, a writable DVD disk (read / writeable DVD-RAM / DVD-RW or write-once DVD-R) has been developed, and a digital video information recording / reproducing device (writable DVD disk) ( An environment in which development of an alternative to a conventional video cassette tape recorder) is possible.

  In view of the above situation, the DVD-RTR (DVD Real Time Recording) standard has been proposed to perform digital recording / playback of video images and the like in real time, and is being put together as an official standard.

  However, as the recording capacity of the disc increases, the type and number of program contents to be recorded tend to increase, and it becomes difficult for the user to grasp the recorded contents. Therefore, a problem arises in terms of managing recorded discs.

  The present invention has been made in view of the above circumstances. The purpose of the present invention is, for example, when a book is being read, at any recording location such as video or audio, with a sense that a bookmark is sandwiched between a page being read or an important location. To provide an apparatus / method and medium capable of writing and erasing marks (entry points).

A digital information medium according to an embodiment of the present invention includes a data area configured to store data of one or more video objects, and a management configured to store management information for managing the video objects. Have an area. Here, the video object is composed of a data unit including MPEG-encoded video information, and the management information is configured to have original program chain information for managing a playback method of the video object, and the original program chain information Includes one or more pieces of program information and one or more pieces of cell information, movie cell information for managing playback of a video object of the video information is defined as the cell information, and the movie cell information is included in the video object. Is configured to include entry point information related to an entry point used for accessing a playback location, and the entry point information is configured to include text information related to the entry point. It includes Biseru general information, the movie cell general information including the end time information of the start time information and the corresponding cell of a corresponding cell. In the thus constructed information medium, said start time information corresponding the stored within the first four of said data units of the video object, the last four of the data of the video object, wherein the end time information corresponding Stored in the unit. Here, the management information includes playback start time information (VOB_V_S_PTM) of the first video field of the video object and playback end time information (VOB_V_E_PTM) of the last video field of the video object.

  Even if the capacity of the disc to be recorded becomes large, the user can easily manage the contents, and recording / reproduction can be performed from the user's favorite location.

  Hereinafter, with reference to the drawings, the configuration of a medium (DVD recording / playback disc) according to an embodiment of the present invention, and the configuration of a DVD-RTR (DVD real-time recording) recording / playback apparatus (RTR video recorder) using this medium Various operations of this apparatus will be described.

  FIG. 1 is a diagram for explaining the structure of an optical disk 10 used in a DVD-RTR recording / reproducing apparatus. As shown in the figure, this optical disc 10 has a structure in which a pair of transparent substrates 14 each provided with layers 17A and 17B are bonded together with an adhesive layer 20.

  If the disc 10 is a single-layer DVD-RAM (or DVD-RW) disc, the first information recording layer 17A is composed of a phase change recording layer, and the second information recording layer 17B is a dummy layer (also serving as the label of the disc). It may be configured).

  If the disk 10 is a single-sided dual-layer DVD-ROM / RAM disk, the first information recording layer 17A is composed of a translucent film (such as a gold thin film) with pits formed thereon, and the second information recording layer 17B is a phase change recording layer Consists of.

  If the disk 10 is a double-sided dual-layer DVD-RAM (or DVD-RW) disk, the first information recording layer 17A and the second information recording layer 17B are both composed of phase change recording layers.

  Each substrate 14 can be made of a 0.6 mm thick polycarbonate, and the adhesive layer 20 can be made of an ultra-thin (about 40 μm to 70 μm) ultraviolet curable resin. The pair of 0.6 mm substrates 14 are bonded so that the layers 17A and 17B are in contact with each other on the surface of the adhesive layer 20, whereby a 1.2 mm thick large capacity optical disk 10 is obtained.

  A center hole 22 is provided in the optical disc 10, and a clamp area 24 is provided around the center hole 22 on both sides of the disc for clamping the optical disc 10 during rotational driving. When the optical disk 10 is loaded in the disk drive device (not shown), the spindle of the disk motor is inserted into the center hole 22. The optical disk 10 is clamped in the clamp area 24 while the disk is rotating by a disk clamper (not shown).

  The optical disc 10 has an information area 25 in which video data, audio data, and other information can be recorded around the clamp area 24.

  A lead-out area 26 is provided on the outer peripheral side of the information area 25. A lead-in area 27 is provided on the inner peripheral side in contact with the clamp area 24. A data recording area 28 is defined between the lead-out area 26 and the lead-in area 27.

  FIG. 1 also illustrates the correspondence between the data recording area 28 of the optical disc 10 and the recording tracks of data recorded therein.

  In the recording layers 17A and 17B of the information area 25, recording tracks are continuously formed in a spiral shape, for example. The continuous track is divided into a plurality of sectors, and consecutive numbers are assigned to these sectors. Various data are recorded on the optical disk 10 using this sector as a recording unit.

  The data recording area 28 is an actual data recording area. As recording / playback information, video data (main video data) such as movies, sub-picture data such as subtitles / menus, and audio data such as dialogue / sound effects are recorded. These are recorded as similar pit rows (physical shapes or phase states that cause optical changes in the laser reflected light).

  When the optical disk 10 is a single-sided, single-sided RAM disk, each recording layer 17A and 17B has a phase change recording material layer (eg, Ge2Sb2Te5) sandwiched between two zinc sulfide / silicon oxide mixtures (ZnS / SiO2). A triple layer can be used.

  When the optical disk 10 is a single-sided, single-sided RAM disk, the recording layer 17A on the reading surface 19 side can be constituted by a triple layer including the phase change recording material layer. In this case, the layer 17B disposed on the opposite side as viewed from the reading surface 19 does not need to be an information recording layer, and may be a simple dummy layer.

  When the optical disk 10 is a single-sided read type two-layer RAM / ROM disk, the two recording layers 17A and 17B have one phase change recording layer 17B (back side as viewed from the reading surface 19; for reading and writing) and one translucent. It can be composed of a metal reflective layer 17A (front side as viewed from the readout surface 19; only for reproduction).

  When the optical disk 10 is a write-once DVD-R, polycarbonate is used as the substrate, gold is used as the reflective film (not shown), and ultraviolet curable resin is used as the protective film (not shown). In this case, an organic dye is used for the recording layer 17A or 17B. As this organic dye, cyanine, squarylium, croconic, triphenylmentane dye, xanthene, quinone dye (naphthoquine, anthraquinone, etc.), metal complex dye (phthalocyanine, volphyrin, dithiol complex, etc.) and others can be used. is there.

  Data writing to such a DVD-R disk can be performed using, for example, a semiconductor laser having a wavelength of 650 nm and an output of about 6 to 12 mW.

  In the various optical disks 10 described above, read-only ROM information is recorded on the recording layer as an emboss signal. On the other hand, such an emboss signal is not engraved on the substrate 14 having a recording layer for reading and writing (or write-once), and a continuous groove is engraved instead. A phase change recording layer is provided in the groove. In the case of a read / write DVD-RAM disc, in addition to the groove, the phase change recording layer in the land portion is also used for information recording.

  When the optical disk 10 is a single-sided read type (with one or two recording layers), the substrate 14 on the back side as viewed from the reading surface 19 does not need to be transparent to the read / write laser. In this case, label printing may be performed on the entire back side substrate 14.

  The DVD-RTR recording / reproducing machine to be described later includes repeated recording / repetitive reproduction (read / write) for a DVD-RAM disk (or DVD-RW disk), one recording / repetitive reproduction for a DVD-R disk, and DVD-ROM disk. It is possible to configure so that repeated reproduction can be performed.

  When the disk 10 is a DVD-RAM (or DVD-RW), the main body of the disk 10 can be stored in the cartridge 11 in order to protect the delicate disk surface.

  When the DVD-RAM disk 10 is inserted into the disk drive of the DVD-RTR recording / reproducing machine together with the cartridge 11, the disk 10 is pulled out from the cartridge 11, clamped on a turntable of a spindle motor (not shown), and faces an optical head (not shown). In this way, it is rotationally driven.

  On the other hand, when the disk 10 is a DVD-R or DVD-ROM, the main body of the disk 10 is not stored in the cartridge 11, and the bare disk 10 is set directly on the disk tray of the disk drive.

  In the recording layer 17 of the information area 25 shown in FIG. 1, data recording tracks are continuously formed in a spiral shape. As shown in the figure, the continuous track is divided into a plurality of logical sectors (minimum recording units) having a constant storage capacity, and data is recorded on the basis of the logical sectors. The recording capacity of one logical sector is determined to be 2048 bytes (or 2 kbytes) which is the same as one pack data length described later.

  In the data recording area 28, which is an actual data recording area, management data, main video (video) data, sub-video data and audio (audio) data are similarly recorded.

  Although not shown, the data recording area 28 of the disk 10 can be divided into a plurality of recording areas (a plurality of recording zones) in a ring shape (annular ring shape). Although the angular velocity of disk rotation differs for each recording zone, the linear velocity or angular velocity can be made constant in each zone. In this case, a spare recording area (free space) can be provided for each zone. The free space for each zone can be collected and used as a reserved area of the disk 10.

  FIG. 2 is a diagram for explaining the hierarchical structure of information recorded on the optical disc of FIG.

  In this structure, the lead-in area 27 includes an embossed data zone having an uneven light reflecting surface, a mirror zone having a flat surface (mirror surface), and a rewritable data zone in which information can be rewritten. The lead-out area 26 is also configured so that information can be rewritten.

  The data recording area (volume space) 28 includes volume / file management information 70 and a data area DA that can be rewritten by the user.

  In the volume / file management information 70, file information of audio / video data recorded in the data area DA and information related to the entire volume are recorded.

  In the data area DA, areas DA1 and DA3 for recording computer data and an audio / video data area DA2 for recording video data / audio data and the like can be mixedly recorded. The recording order of computer data and audio / video data, the recording information size, etc. are arbitrary. It is possible to record only computer data or only audio / video data in the data area DA.

  The audio / video data area DA2 includes control information DA21, a video object DA22, a picture object DA23, and an audio object DA24.

  The control information DA21 can include control information necessary for performing various processes such as recording (recording and / or recording), reproduction, editing, and search.

  The video object DA22 can include information on the contents (contents) of recorded video data.

  The picture object DA23 can include still image information such as a still image and a slide image.

  The audio object DA24 can include information on the contents (contents) of recorded audio data.

  Note that the video object DA22 includes a video object set VOBS. This VOBS has contents corresponding to one or more program chains PGC # 1 to #k, each of which designates a cell playback order by a different method.

For example, the following information is recorded in advance in the emboss data zone of the lead-in area 27:
(1) Disc type such as DVD-ROM, DVD-RAM (or DVD-RW), DVD-R; disc size such as 12 cm, 8 cm; recording density; physical sector number indicating recording start / recording end position, other Information on the entire information storage medium;
(2) Recording power and recording pulse width; erasing power; reproducing power; linear velocity during recording / erasing, and other information relating to recording / reproducing / erasing characteristics; and (3) individual information recording media such as manufacturing number Information about manufacturing.

The rewritable zones of the lead-in area 27 and the lead-out area 26 each include, for example, the following areas:
(4) Area for recording a unique disk name for each information recording medium;
(5) Trial recording area (for confirming recording erasure conditions);
(6) An area for recording management information related to the defective area in the data area DA.

  In the areas (4) to (6), recording by a DVD-RTR recorder / player (RTR video recorder or personal computer with a DVD-RAM drive) is possible.

  When the disc 10 is set in a DVD-RTR recorder / player (RTR video recorder), information in the lead-in area 27 is first read. In the lead-in area 27, predetermined reference codes and control data are recorded in ascending order of sector numbers.

  The reference code of the lead-in area 27 is composed of two error correction code blocks (ECC blocks). Each ECC block is composed of 16 sectors. These two ECC blocks (32 sectors) are generated by adding scramble data. When a reference code to which scrambled data is added is reproduced, a reproduction-side filter operation or the like is performed so that a specific data symbol (for example, 172) is reproduced, thereby ensuring subsequent data reading accuracy.

  The control data of the lead-in area 27 is composed of 192 ECC blocks. In this control data portion, the contents of 16 sectors in each block are repeatedly recorded 192 times.

  This control data composed of 16 sectors includes physical format information in the first sector (2048 bytes), followed by disc manufacturing information and content provider information.

  The physical format information included in the control data includes the following contents.

  That is, in the first position, which version of the DVD standard the recorded information is based on is described.

  In the second position, the size (12 cm, 8 cm, etc.) and the minimum reading rate of the recording medium (optical disk 10) are described. In the case of read-only DVD video, 2.52 Mbps, 5.04 Mbps, and 10.08 Mbps are specified as the minimum read rate, but other minimum read rates are also reserved. For example, when recording is performed at an average bit rate of 2 Mbps by an RTR video recorder capable of variable bit rate recording, the minimum reading rate is set to 1.5 to 1.8 Mbps by using the reserved portion. be able to.

  In the third position, the disk structure of the recording medium (optical disk 10) (number of recording layers, track pitch, recording layer type, etc.) is described. Depending on the type of the recording layer, it is possible to identify whether the disk 10 is a DVD-ROM, a DVD-R, or a DVD-RAM (or DVD-RW).

  In the fourth position, the recording density (linear density and track density) of the recording medium (optical disk 10) is described. The linear density indicates a recording length per bit (such as 0.267 μm / bit or 0.293 μm / bit). The track density indicates an adjacent track interval (0.74 μm / track or 0.80 μm / track). A reserve portion is also provided at the fourth position so that different numerical values can be designated as the linear density and track density of DVD-RAM or DVD-R.

  In the fifth position, the start sector number and end sector number of the data area 28 of the recording medium (optical disc 10) are described.

  In the sixth position, a burst cutting area (BCA) descriptor is described. This BCA is optionally applied only to a DVD-ROM disc, and is an area for storing recording information after the disc manufacturing process is completed.

  In the seventh position, the free capacity of the recording medium (optical disk 10) is described. For example, when the disk 10 is a single-sided single layer recording DVD-RAM disk, information indicating 2.6 GB (or the number of sectors corresponding to the number of bytes) is written at this position of the disk 10. When the disk 10 is a double-sided recording DVD-RAM disk, information indicating 5.2 GB (or the number of sectors corresponding to the number of bytes) is written at this position.

  Other positions are reserved for the future.

  FIG. 3 is a diagram for explaining the data structure of the video object of FIG.

  As shown in the figure, each cell (for example, cell #m) constituting the video object DA22 is composed of one or more video object units (VOBU). Each VOBU is configured as an aggregate (pack row) such as a video pack, a sub-picture pack, an audio pack, and a dummy pack.

  Each of these packs has a predetermined size of 2048 bytes and is the minimum unit when performing data transfer processing. Further, the minimum unit for performing logical processing (minimum basic unit of video information) is a cell unit, and logical processing is performed in this cell unit.

The playback time of the VOBU corresponds to the playback time of video data composed of one or more video groups (group of pictures; GOP for short) included in the VOBU, and the playback time is 0.4 second to 1.. It is determined within a range of 2 seconds. One GOP is screen data that is usually about 0.5 seconds in the MPEG standard and compressed so that about 15 frame images are reproduced during that time. (A VOBU includes an integer number of GOPs except in a special case where a gap occurs in the flow of video data. In other words, a VOBU is usually a video information compression unit synchronized with a GOP.)
When the VOBU includes video data, a GOP (MPEG standard compliant) composed of a video pack, a sub-picture pack, an audio pack, etc. is arranged to form a video data stream. However, regardless of the number of GOPs, the VOBU is determined based on the GOP playback time.

  Note that even if the playback data includes only audio and / or sub-picture data not including video, the playback data is configured with VOBU as one unit. For example, when a VOBU is composed only of audio packs, an audio pack to be played within the playback time of the VOBU to which the audio data belongs is stored in the VOBU, as in the case of a video object of video data.

  The packs constituting each VOBU have the same data structure except for the dummy pack. Taking an audio pack as an example, as illustrated in FIG. 3, a pack header is arranged at the top, a packet header is arranged next, a substream ID is arranged next, and audio data is arranged at the end. The In such a pack configuration, information of the presentation time stamp PTS indicating the start time of the first frame in the packet is written in the packet header.

  By the way, in a DVD-RTR recording / reproducing apparatus capable of recording a video program including the video object DA22 having the structure shown in FIG. 3 on the optical disc 10, there is a case where the recorded contents are desired to be edited after the program is recorded. In order to respond to this requirement, a dummy pack can be inserted into each VOBU as appropriate. This dummy pack can be used when editing data is recorded later.

  The dummy pack of FIG. 3 has a data structure as shown in FIG. That is, one pack of dummy packs 89 includes a pack header 891, a packet header 892 having a predetermined stream ID, and padding data 893 filled with a predetermined code (invalid data). Here, the packet header 892 and the putting data 893 constitute a putting packet 890. The contents of padding data 893 of unused dummy packs have no particular meaning.

  This dummy pack 89 can be used as appropriate when editing the recorded content after a predetermined recording is made on the disk 10 of FIG.

Specifically, the dummy pack
For post-addition of information to be recorded after recording (after-recording information is inserted into the audio pack and the memo information exchanged with the dummy pack is inserted into the sub-picture pack as sub-picture information and exchanged with the dummy pack, etc.) ;
To make the VOBU size an integer multiple of the ECC block size (32 kbytes), make up for the missing size from the integer multiple of 32 kbytes;
It is inserted in each VOBU for the purpose of use.

  The dummy pack can also be used to store data of reduced images (thumbnail pictures) displayed as appropriate in the user menu.

  FIG. 5 is a diagram for explaining an example of a directory structure of information (data file) recorded on the optical disc of FIG. 1 with the data structure of FIG.

  According to the DVD-RTR standard that allows digital recording / playback of video images in real time, the contents of the DVD disc are managed in a directory structure as shown in FIG. 5 and stored according to a file system such as IS09660 or UDF.

  Even if the disk / device side has a data structure as shown in FIG. 2, this data structure is not visible to the user. The data structure perceivable by the user is a hierarchical file structure as shown in FIG.

  That is, according to the type of data recorded in the data area DA of FIG. 2, a root directory display screen (not shown) includes a DVD_RTR directory, a VIDEO_TS directory, an AUDIO_TS directory, a computer data file directory, etc. It is displayed by a screen or an icon.

  In the DVD_RTR directory in FIG. 5, the file RTR. IFO, movie video object RTR_MOV. VOB file RTR_MOV. VRO, still picture video object RTR_STO. VOB file RTR_STO. VRO, still picture additional audio object RTR_STA. VOB file RTR_STA. VRO, etc. are stored.

  Here, the file RTR. The IFO stores management information for managing moving image information such as a program set, a program, an entry point, and a playlist.

  In addition, the file RTR_MOV. VRO stores the recorded moving image information and its audio information, and the file RTR_STO. VRO stores the recorded still image information and its audio information, and the file RTR_STA. The VRO stores post-record data for still images.

  If the DVD-RTR recorder / player (RTR video recorder) has the function of displaying (or outputting) the directory shown in FIG. 5 and the DVD video disc (ROM disc) playback function, the DVD video disc is set in the disc drive. Then, the VIDEO_TS directory in FIG. 5 becomes active. In this case, when the VIDEO_TS directory is opened, the recorded contents of the set desk are further displayed.

  When the DVD-RTR recorder / player has a DVD audio playback function, the AUDIO_TS directory in FIG. 5 becomes active when a DVD audio disk is set in the disk drive. In this case, when the AUDIO_TS directory is opened, the recorded contents of the set desk are further displayed.

  Further, when the DVD-RTR recording / reproducing apparatus is composed of a personal computer with a DVD-RAM drive and also has a computer data processing function, a DVD-RAM (or DVD-ROM) disk in which computer data is recorded in the disk drive. Is set, the computer data directory of FIG. 5 becomes active. In this case, when the computer data directory is opened, the recorded contents of the set desk are further displayed.

  While viewing the menu screen or window display screen displayed in the directory structure of FIG. 5, the user feels as if he / she is handling a personal computer, and the computer data (computer program) is recorded in the source of DVD video recording, DVD video ROM, DVD audio. Also included).

  FIG. 6 is a diagram for explaining the data structure of the navigation data file (RTR_VMG) in FIG. The RTR video manager RTR_VMG as navigation data is composed of various types of information as shown in FIG.

  In FIG. 6, RTR video manager information RTR_VMGI describes basic information of the recordable / reproducible optical disc (RTR disc) 10 in FIG. This RTR_VMGI includes a video manager information management table VMGI_MAT and a playlist search pointer table PL_SRTP.

  RTR_VMG further includes a movie AV file information table M_AVFIT, a still picture AV file information table S_AVFIT, original PGC information ORG_PGCI, a user-defined PGC information table UD_PGCIT, a text data manager TXTDT_MG, and a manufacturer information table MNFIT.

  FIG. 7 shows the contents of the video manager information management table VMGI_MAT of FIG.

  In FIG. 7, the VMG identifier VMG_ID describes “DVD_RTR_VMG0” that specifies the RTR_VMG file with the ISO646 character set code.

  RTR_VMG_EA describes the end address of RTR_VMG with a relative byte number from the first byte of RTR_VMG.

  VMGI_EA describes the end address of RTR_VMGI with a relative byte number from the first byte of RTR_VMG.

  VERN describes the version number of the DVD standard for video recording (real-time video recording).

  TM_ZONE describes the time zone of the RTR disc. In the DVD_RTR standard, five types of data fields (PL_CREATE_TM, VOB_REC_TM, FIRST_VOB_REC_TM, LAST_VOB_REC_TM, and VOBU_REC_TM) are defined. These five data fields are collectively called REC_TM. REC_TM includes data TZ_TY and TZ_OFFSET. TZ_TY describes the integrated universal time or local time, and TZ_OFFSET describes the offset of the date and time from the integrated universal time in minutes.

  STILL_TM describes the still time of a still image in seconds.

  The CHRS describes a character set code used for primary text information. By this CHRS, for example, a character set code of ISO8859-1 or a shift JIS kanji code can be designated.

  RSM_MRKI describes a program chain number PGCN, a program number PGN, a cell number CN, a marker point MRK_PT, and a marker creation time MRK_TM. PGCN here indicates the number of the program chain where the marker point exists. When the marker exists in the original original PGC, PGCN is set to “0”. PGN indicates the number of the program in which the marker point exists. When the resume marker exists in the PGC defined by the user, PGN is set to “0”. CN indicates the cell number where the marker point exists. MRK_PT indicates a marker point in the target cell. When there is a resume marker in the movie cell, MRK_PT describes the playback time (PTM) in the RTR playback time description format. MRK_TM describes the time when the marker was created in the RTR date / time description format.

  REP_PICTI describes a program chain number PGCN, a program number PGN, a cell number CN, a picture point PICT_PT, and a representative image creation time CREAT_TM of the disc.

  Here, PGCN indicates the number of the program chain in which the representative image of the disk exists. The representative image of the disc is specified only by the pointer in the original PGC. Therefore, when this representative image pointer exists, PGCN is set to “0”. PGN indicates the number of the program in which the representative image of the disc exists. When the resume marker exists in the PGC defined by the user, PGN is set to “0”. CN indicates the number of a cell in which a representative image of the disc exists. PICT_PT indicates a representative image of the disk in the target cell. When this representative image exists in the movie cell, PICT_PT describes the playback time (PTM) in the RTR playback time description format. When this representative image exists in the still image cell, PICT_PT describes the still image VOB entry number (S_VOB_ENTN) in the corresponding still image VOB group (S_VOG). CREAT_TM describes the time when the representative image of the disc was created in the RTR date / time description format.

  M_AVFIT_SA describes the start address of the movie AV file information table M_AVFIT in FIG. 6 with a relative byte number from the first byte of RTR_VMG.

  S_AVFIT_SA describes the start address of the still picture AV file information table S_AVFIT of FIG. 6 with a relative byte number from the first byte of RTR_VMG.

  ORG_PGCI_SA describes the start address of the original PGC information ORG_PGCI in FIG. 6 with a relative byte number from the first byte of RTR_VMG.

  UD_PGCIT_SA describes the start address of the user-defined PGC information table UD_PGCIT in FIG. 6 with a relative byte number from the first byte of RTR_VMG. When UD_PGCIT does not exist, UD_PGCIT_SA is set to “0000 0000h”.

  TXTDT_MG_SA describes the start address of the text data manager TXTDT_MG in FIG. 6 with a relative byte number from the first byte of RTR_VMG. When TXTDT_MG does not exist, TXTDT_MG_SA is set to “0000 0000h”.

  MNFIT_SA describes the start address of the manufacturer information table MNFIT in FIG. 6 with a relative byte number from the first byte of RTR_VMG. When MNFIT does not exist, MNFIT_SA is set to “0000 0000h”.

  FIG. 8 shows the data structure of the playlist search pointer table PL_SRPT of FIG.

  PL_SRPT describes information necessary for searching and accessing a playlist in the RTR disc, and includes playlist search pointer table information PL_SRPTI and one or more playlist search pointers PL_SRP # 1 to PL_SRP # n. It is out.

  Each playlist is configured by a user-defined PGC, and each PL_SRP has a PGC number corresponding to the playlist.

  The playlist is specified by the playlist number PLN attached thereto. PLNs are assigned to all PL_SRPs, and these PLNs are numbered from 1 to 99 in the order of description of one or more PL_SRPs in PL_SRPT.

  The user can identify a specific playlist from others by using PLN. Alternatively, the user can identify a specific playlist from others by text information given to the playlist.

  FIG. 9 shows the contents of the playlist search pointer table information PL_SRPTI of FIG.

  PL_SRP_Ns indicates the number of playlist search pointers PL_SRP in PL_SRPT.

  PL_SRPT_EA indicates the end address of the playlist search pointer PL_SRPT described by a relative byte number from the first byte of PL_SRPT.

  FIG. 10 shows the contents of the playlist search pointer table PL_SRP of FIG.

  In FIG. 10, PL_TY describes a play list format. That is, it is possible to specify whether the playlist is a movie playlist, a still picture playlist, or a hybrid (mixed movie and still picture) playlist based on the contents of PL_TY (4-byte PL_TY1).

  PGCN describes the number of the corresponding user-defined program chain UD_PGC. The maximum number of PGCNs is 99.

  PL_CREATE_TM describes the time when the playlist was created in the RTR date / time description format. This PL_CREATE_TM can describe up to year, month, day, hour, minute, and second.

  PRM_TXTI describes primary text information for a playlist. This PRM_TXTI consists of 128 bytes, the first 64 bytes are used to describe the primary text information in the ASCII character set, and the remaining 64 bytes are the primary text information in other character sets (such as Shift JIS or ISO8859-15). Used for description. Other character set codes are described in VMGI_MAT, and can be used for all primary text information in the corresponding disc. Note that the terminal control code is not described in PRM_TXTI.

IT_TXT_SRPN describes the number of IT_TXT_SRP of the playlist. (Item text IT_TXT will be described later with reference to FIG. 18).
THM_PTRI describes information of the thumbnail pointer THM_PTR. Setting or using the thumbnail pointer information THM_PTRI can be treated as an option for both the RTR recorder and the RTR player. If the RTR recorder does not have the ability to handle THM_PTRI, all of the 8-byte THM_PTRI may be set to “FFh”. If the RTR player does not have the ability to handle THM_PTRI, THM_PTRI may simply be ignored.

  The thumbnail is an image of a small image about the size of a thumb nail, and usually refers to an image obtained by reducing a still image in a recorded video image to a thumbnail size.

  FIG. 11 shows the contents of the thumbnail pointer information THM_PTRI in FIG. In FIG. 11, CN describes the number of a cell in which a thumbnail point exists. THM_PT describes a thumbnail point in the target cell.

  Here, when there is a resume marker in the movie cell, THM_PT describes the playback time (PTM) in the playback time description format of the RTR.

When a thumbnail exists in the still picture cell, THM_PT is
The still picture VOB entry number (S_VOB_ENTN) in the corresponding still picture VOB group (S_VOG) is described.

  FIG. 12 shows the data structure of the movie AV file information table M_AVFIT of FIG.

  M_AVFIT describes the information of a movie AV file (file RTR_MOV.VRO in FIG. 5), movie AV file information table information M_AVFITI, one or more movie VOB stream information M_VOB_STI # 1 to M_VOB_STI # n, movie AV file information M_AVFI is included.

  M_AVFI is information of a movie AV file having a predetermined file name (RTR_MOV.VRO). The movie AV file information general information M_AVFI_GI, one or more movie VOB information search pointers M_VOBI_SRP # 1 to M_VOBI_SRP # n, One or more movie VOB information M_VOBI # 1 to M_VOBI # n are included.

  One movie AV file can include one or more VOBs, and each VOB has movie VOB information M_VOBI for the VOB in M_AVFI. One or more M_VOBIs in M_AVFI are described in the same order as VOB data stored in the movie AV file.

  FIG. 13 shows the data structure of the movie VOB information M_VOBI of FIG. As shown in the drawing, M_VOBI includes movie VOB general information M_VOBI_GI, seamless information SMLI, audio gap information AGAPI, and time map information TMAPI.

  M_VOBI_GI in FIG. 13 describes VOB_TY that describes the VOB format, VOB_REC_TM that describes the recording time of the VOB in the RTR date / time description format, and the recording time (subsecond information) of the VOB at the beginning of the video field. VOB_REC_TM_SUB, M_VOB_STIN describing the number of movie VOB stream information, VOB_V_S_PTM describing the playback start time of the first video field of the VOB in the RTR playback time description format, and RTR playback of the playback end time of the last video field of the VOB VOB_V_E_PTM described in the time description format.

  The above VOB_TY includes TE indicating whether or not the VOB is in a temporary erasure state, A0_STATUS indicating the state of the audio stream # 0, A1_STATUS indicating the state of the audio stream # 1, and an analog copy protection type or on / off. An analog protection system APS indicating the state, SML_FLG indicating whether or not the VOB should be played back seamlessly, A0_GAP_LOC indicating whether there is an audio gap in the audio stream # 0 and where it exists , A1_GAP_LOC indicating whether or not there is an audio gap in the audio stream # 1 and where it exists.

  The VOB_REC_TM is updated to indicate the time when the head of the remaining VOB is recorded when the head of the VOB is deleted (erased).

  That is, “new VOB_REC_TM = old VOB_REC_TM + reproduction duration of the deleted portion”.

On the other hand, if the playback duration of the deleted portion cannot be displayed in seconds (for example, if the playback duration of the deleted portion is 60.5 seconds),
“New VOB_REC_TM + New VOB_REC_TM_SUB = old VOB_REC_TM + old VOB_REC_TM_SUB + reproduction duration of the deleted portion”.

  Since VOB_REC_TM describes the date and time of video recording, even if the audio data is modified, VOB_REC_TM is not affected by this.

  Here, the RTR date and time description format described above will be briefly described. In this format, the reproduction time PTM is expressed by a PTM base and a PTM extension. The PTM base is a value measured in units of 90 kHz, and the PTM extension is a value measured in units of 27 MHz.

  The SMLI in FIG. 13 includes VOB_FIRST_SCR in which the SCR (system clock reference) of the first pack of the current VOB is described in the RTR playback time description format, and PREV_VOB_LAST_SCR in which the SCR of the last pack of the preceding VOB is described in the RTR playback time description format. It is out.

  FIG. 14 shows the data structure of the time map information TMAPI of FIG. The time map information TMAPI is used when performing special playback (cell playback in an order unique to an individual user using a user-defined PGC) and time search.

  The time map information TMAPI includes time map general information TMAP_GI, one or more time entries TM_ENT # 1 to TM_ENT # r, and one or more VOBU entries VOBU_ENT # 1 to VOBU_ENT # q.

  Each VOBU entry includes information on the size and playback time of each VOBU. The size of VOBU is indicated in units of sectors (2 kbytes), and the playback time is indicated in units of video fields (1 field 1/60 seconds in NTSC; 1 field 1/50 seconds in PAL).

  Since the VOBU size is indicated in units of sectors as described above, the VOBU can be accessed by addresses in units of sectors.

  Each VOBU entry includes reference picture size information 1STREF_SZ, VOBU playback time information VOBU_PB_TM, and VOBU size information VOBU_SZ.

  Here, VOBU_PB_TM represents the playback time of the corresponding VOBU in video field units. The reference picture size information 1STREF_SZ represents the size of the first reference picture (corresponding to the MPEG I picture) of the VOBU in units of sectors.

  On the other hand, each time entry includes address information (VOBU_ADR) of the corresponding VOBU and time difference information (TM_DIFF). This time difference information indicates the difference between the playback time specified by the time entry and the playback start time of the VOBU.

  If the time interval (time unit TMU) between two continuous time entries is 10 seconds, this time entry interval corresponds to 600 fields in NTSC video, for example.

  Normally, the “VOBU time interval” is represented by the number of fields in the VOBU entry. As another method, the “clock interval from one VOBU to the next VOBU” can be used to represent the “VOBU time interval”. "Count value by" can also be used.

  As a specific example, “the difference value between the presentation time stamp PTS at the head position of one VOBU and the PTS value at the head position of the immediately following VOBU” represents the “VOBU time interval”. be able to.

  In other words, “the time interval in the unit can be indicated by the differential value of the clock counter in the specific unit”.

  FIG. 15 shows the contents of the time map general information TMAP_GI of FIG.

  The time map general information TMAP_GI includes TM_ENT_Ns indicating the number of time entries in the corresponding time map information, VOBU_ENT_Ns indicating the number of VOBU entries in the corresponding time map information, a time offset TM_OSF for the corresponding time map information, and the corresponding time map information. Address offset ADR_OFS.

  When the time unit TMU is a value corresponding to 600 fields in NTSC video (or 500 fields in PAL video) (corresponding to 10 seconds), the time offset TM_OSF is used to indicate a time lag within the TMU.

  When the VOB size is represented by the number of sectors, the address offset ADR_OFS is used to indicate a file pointer from the beginning of the AV file.

  FIG. 16 shows the contents of the time entry TM_ENT of FIG.

  This time entry TM_ENT includes VOBU_ENTN indicating the number of the corresponding VOBU entry, TM_DIFF indicating the time difference between the playback start time of the VOBU specified by the time entry and the calculated playback time, and VOBU_ADR indicating the target VOBU address. Is included.

  When the time unit TMU is represented by 600 fields in NTSC (or when the time unit TMU is represented by 500 fields in PAL), the “calculated playback time” for the time entry #j is TMU × (j−1) + TM_OSF.

  The VOBU_ADR represents the target VOBU address by the total size of the preceding VOBUs of the VOB when the VOBU size is expressed in units of sectors.

  In the data configuration as exemplified above, in order to start reproduction from the middle of a certain VOBU, the access point must be determined. Let this access point be a time entry point.

  This time entry point is located at a position separated from the position indicated by the movie address information of VOBU by the time difference indicated by the time difference information TM_DIFF in the time entry TM_ENT. This time entry point becomes a special reproduction start point (or time search point) indicated by the time map information TMAPI.

  FIG. 17 shows the data structure of the user-defined PGC information table UD_PGCIT in FIG.

  The UD_PGCIT includes user-defined PCG information table information UD_PGCITI, one or more user-defined PGCI search pointers UD_PGCI_SRP # 1 to UD_PGCI_SRP # n, and one or more user-defined PGC information UD_PGCI # 1 to UD_PGCI # n.

  All UD_PGCs are assigned program chain numbers PGCN from 1 to 99 in the order of description of UD_PGCI_SRP in UD_PGCIT. Each PGC can be specified by this PGCN.

  Here, UD_PGCITI includes UD_PGCI_SRP_Ns indicating the number of UD_PGCI_SRPs and UD_PGCIT_EA indicating the end address of UD_PGCIT.

  The maximum value of UD_PGCI_SRP_Ns is set to “99”, for example. UD_PGCIT_EA represents the end address of UD_PGCIT with a relative byte number from the first byte of UD_PGCIT.

Further, UD_PGCI_SRP includes a start address UD_PGCI_SA of UD_PGCI. This UD_PGCI_SA
Represents the start address of UD_PGCI with a relative byte number from the first byte of UD_PGCIT.

  FIG. 18 shows the data structure of the text data manager TXTDT_MG in FIG.

  TXTDT_MG includes text data information TXTDTI, one or more item text search pointers IT_TXT_SRP # 1 to IT_TXT_SRP # n, and one or more item texts IT_TXT.

  TXTDTI is a TXRSDT_MG with a CHRS describing the character set code (ISO8859-1 or Shift JIS Kanji) used in TXTDT_MG, IT_TXT_SRP_Ns describing the number of IT_TXT_SRP, and a relative byte number from the first byte of TXTDT_MG. TXTDT_MG_EA describing the end address.

  Each IT_TXT_SRP includes IT_TXT_SA that describes the start address of IT_TXT with a relative byte number from the first byte of TXTDT_MG.

  IT_TXT describes the item text with the character code specified by the CHRS. The data length (number of bytes) of IT_TXT changes according to the content of the text.

  FIG. 19 shows the data structure of PGC information PGCI (original PGC or user-defined PGC information).

  PGCI contains navigation information for program chain PGC.

  There are two types of program chains: original PGC and user-defined PGC (see the contents of RTR_VMG in FIG. 6). The original PGC has VOB and PGCI. However, the user-defined PGC does not have its own VOB and is configured to refer to the VOB in the original PGC.

  As shown in FIG. 19, PGC information (PGCI # i) includes PGC general information PGC_GI, one or more program information PGI # 1 to PGI # m, and one or more cell information search pointers CI_SRP # 1 to CI_SRP # n. And one or more pieces of cell information CI # 1 to CI # n.

  Here, the start address of the cell information CI can be indicated by CI_SA described by a relative byte number from the first byte of PGCI.

  FIG. 20 shows the contents of the PGC general information PGC_GI of FIG.

  This PGC_GI includes PG_Ns that describes the number of programs in the PGC and CI_SRP_Ns that describes the number of CI_SRPs in the PGC.

  Here, in the case of a user-defined PGC, PG_Ns is set to “0”. The maximum number of programs PG of the original PGC is “99”, and the maximum number of cells in the PGC is “999”.

  FIG. 21 shows the contents of the program information PGI of FIG.

  This PGI includes PG_TY describing the program format, C_Ns describing the number of cells in the PG, primary text information PRM_TXTI used for the PG, and IT_TXT search pointer number IT_TXT_SRPTN where the text data corresponds to the PG. , Thumbnail pointer information THM_PTRT.

  Here, PRM_TXTI is composed of a 128-byte field, and the first 64 bytes are described in the ASCII character set. When the ASCII text is less than 64 bytes, “00h” is written in the blank byte.

  The last 64 bytes of the 128-byte field are used to describe the primary text of another character set (eg Shift JIS or ISO 8859-15). Here, the code of “other character set” is described in VMGI_MAT and is shared by all primary text information in the disc.

  Note that a terminal control code that takes a value between “01h” and “1Fh” is not described in PRM_TXTI.

  The THM_PTRI describes thumbnail pointer information. That is, THM_PTRI includes CN that describes the number of the cell in which the thumbnail point exists, and THM_PT that describes the thumbnail point in the target cell.

  Here, when there is a resume marker in the movie cell, THM_PT describes the playback time (PTM) in the playback time description format of the RTR.

  When the thumbnail exists in the still picture cell, THM_PT describes the still picture VOB entry number (S_VOB_ENTN) in the corresponding still picture VOB group (S_VOG).

  Setting or using THM_PTRI can be treated as an option for both the RTR recorder and the RTR player. When the RTR recorder does not have the ability to handle THM_PTRI, all of the 8-byte THM_PTRI may be set to “FFh”. If the RTR player does not have the ability to handle THM_PTRI, THM_PTRI may simply be ignored.

  FIG. 22 shows the data structure of the cell information CI of FIG. As shown in the figure, there are two types of cell information: movie cell information M_CI and still picture cell information S_CI.

  Information about entry points (M_C_EPI) is stored in the navigation data file RTR. It is written in the movie cell information M_CI in the IFO.

  FIG. 23 shows the data structure of the movie cell information M_CI of FIG. As shown in the figure, the M_CI includes movie cell general information M_C_GI and one or more movie cell entry point information M_C_EPI # 1 to M_C_EPI # n.

  FIG. 24 shows the contents of the movie cell general information M_C_GI of FIG.

  That is, M_C_GI includes C_TY that describes the cell format, M_VOBI_SRPN that describes the number of the movie VOBI search pointer corresponding to the VOB of this cell, C_EPI_Ns that describes the number of cell entry point information, and the playback start of this cell It includes C_V_S_PTM in which the time is described in the RTR playback time description format and C_V_E_PTM in which the playback end time of this cell is described in the RTR playback time description format.

  Here, the following conditions are satisfied in C_V_S_PTM and C_V_E_PTM.

(1) For a cell in the original PGC C_V_S_PTM goes into the first four VOBUs of the corresponding VOB;
C_V_E_PTM falls within the last four VOBUs of the corresponding VOB;
(2) In the case of a cell in a user-defined PGC: To satisfy the relationship of O_C_V_S_PTM ≦ C_V_S_PTM <C_V_E_PTM ≦ O_C_V_E_PTM;
However, O_C_V_S_PTM indicates the reproduction start time of the original cell corresponding to the VOB referenced in this cell, and O_C_V_E_PTM indicates the reproduction end time of the original cell corresponding to the VOB referenced in this cell.

  FIG. 25 shows the contents of the movie cell entry point information M_C_EPI of FIG.

  There are two types of M_C_EPI (type 1 and type 2). Type 1 M_C_EPI without text information is composed of EP_TY and EP_PTM, and type 2 M_C_EPI with text information is composed of EP_TY, EP_PTM and PRM_TXTI. FIG. 25 shows the case of type 2.

  As shown in FIG. 25, M_C_EPI includes EP_TY describing the entry point format, EP_PTM describing the entry point playback time in the RTR playback time description format, and PRM_TXTI describing the entry point primary text information and the like. It is out.

  When playback is performed, the value of EP_PTM and the cell playback time are converted into a file pointer indicating VOBU by the time map TMAP information (see FIGS. 14 to 16), and this is further converted into a physical address by the file system. It has come to be.

  PRM_TXTI of M_C_EPI is composed of a 128 byte field. The first 64 bytes are used to describe primary text in the ASCII character set. When the primary text of the ASCII character set is less than 64 bytes, the portion less than 64 bytes is filled with “00h”. The remaining 64 bytes are used to describe primary text in other character sets (Shift JIS, ISO 8859-15, etc.). This “other character set” is described in VMGI_MAT and supplied to all primary text information on the disc.

  A terminal control code that takes a value between “01h” and “1Fh” is not described in PRM_TXTI.

  EP_TY of M_C_EPI is composed of 1-byte data including a 2-bit type identification code. If this identification code is “00b”, it indicates that it is M_C_EPI of type 1 (primary text data is empty or absent), and if it is “01b”, it indicates that it is M_C_EPI of type 2 (with primary text data). It has become.

This EP_TY has a reserved area for 6 bits in addition to the 2-bit type identification code for identifying type 1 and type 2. The contents of PRT_TXTI of M_C_EPI can be further specified using a part or all of the bits of the reserved area. (If all 6 bits are used, a maximum of 64 types can be specified. It is possible to assign more than 6 bits to this designation code so that more types can be designated.)
Hereinafter, the bit using the reserved area is referred to as a designation code for designating the contents of the primary text information.

  The PRM_TXTI of M_C_EPI in FIG. 25 is “text information” with “information type” and / or “information date”, or “information type” and / or “information date”, depending on the specific bit of the designation code. You can specify whether it is “text information”.

Further, according to the specific bit of the designation code, whether the PRM_TXTI of the M_C_EPI in FIG. 25 is “text information” with the corresponding “thumbnail information” in addition to the “information type” and / or “information date” or “thumbnail”. You can specify whether it is “text information” without “information”. (The “thumbnail information” here is information corresponding to the thumbnail pointer information THM_PTRI in FIG. 21, for example.)
Furthermore, it is possible to specify whether the PRM_TXTI of M_C_EPI in FIG. 25 is only “thumbnail information” without “text information” or “thumbnail information” accompanied by “text information” by the specific bit of the above-described specification code.

  When the designation code (not shown) in the EP_TY designates “information type”, “information date”, and “text information” in FIG. 25, these pieces of information can be used to express the following contents. .

  That is, the attribute of the entry point is described in “Information Type”, the date and time when the entry point is registered (recorded on the disk) is described in “Information Date”, and the additional information related to the entry point is described in “Text Information” (Simple description of entry point video, etc.) is described.

Examples of the entry point attribute described in the “information type” include the following:
Information type [1] = 0; user mark (user registers entry point)
Information type [1] = 1; Set mark (Recorder / recorder registers entry point)
Information type [1] = 2; Defect start mark Information type [1] = 3; Defect end mark Information type [1] = 4; Playback start mark Information type [1] = 5; Playback end mark Information type [1] = 6; Unerasable mark Information type [1] = 7;
Here, [1] of the information type [1] means the first data field of the information type. If this data field is composed of 3 bits, the information type [1] can indicate 8 types of marks.

  Note that information similar to the “information type”, “information date” and / or “text information” (and “thumbnail information”) in FIG. 25 can also be provided in the playlist search pointer PL_SRP in FIG.

  Incidentally, the DVD_RTR system is configured to handle text information other than text managed by the text data manager TXTDT_MG of FIG. The text information includes primary text information described in the program (FIG. 21), primary text information described in the playlist (FIG. 10), and primary text information described in the selected entry point (FIG. 25). .

  These primary text information PRM_TXTI is used for the user to identify the corresponding recorded contents using a character set such as ASCII or Shift JIS.

  An example is shown in FIG. That is, the player (RTR recording / playback device) reads the primary text information PRM_TXTI of FIG. 21 from the disc 10, and displays the recording date and time information of the recorded programs (PG1, PG2, PG3,...) On the display panel of the player. (In this example, program # 1 indicates that recording started at 12:30:15 in the daytime).

  When the corresponding primary text information PRM_TXTI is read from the disc, the player outputs the result to a monitor (television). Then, before the recorded program (PG1, PG2, PG3,...) Starts playing, the simple contents of the program recorded on the disk 10 (PG1 “barbecue with family”) and PG2 “daughter 7 years old” Will be displayed on the monitor screen.

  The user can easily select a desired program from this display. When the user selects a desired program (for example, “family barbecue”) by operating the cursor on a remote controller (not shown) and presses the playback button, playback of program # 1 is started.

  The display / user selection / playback operation using the primary text information PRM_TXTI (FIG. 10) of the playlist or the display / user selection / playback operation using the primary text information PRM_TXTI (FIG. 25) of the entry point is the same for the user. It can be done with a sense.

  That is, as illustrated in FIG. 27, an entry point (corresponding to “bookmark” in the case of a book) is attached to an arbitrary place in each program, and the primary text information PRM_TXTI (FIG. 25) of the entry point is added. You can store text like “barbecue with family”.

  Also, when the user disassembles the recorded programs # 1 to # 4 into arbitrary parts, registers the playback order of the disassembled parts in playlists # 1 and # 2, and each part has an entry point The same is true.

  Furthermore, a short title such as “Grandma and barbecue” can be written in the primary text information PRM_TXTI (FIG. 10) of each playlist.

  28 shows the playback start time / playback end time of the cells constituting the user-defined PGC (or the original PGC) and the movie video object RTR_MOV. It is a figure explaining the correspondence example with the offset address with respect to VOBU of each video object VOB which comprises VRO.

  28, the PGCI and M_VOBI information is the RTR. Stored in an IFO file. Also, the VOB of the VOBU set corresponding to the PCG of the cell set is RTR_MOV. Stored in a VRO file.

  The program chain information PGCI of the original PGC in FIG. 28 manages a program reproduction method that is one or more cell sets, and each user-defined PGC manages one or more cell set reproduction methods determined by the user.

  Further, the playback start time and playback end time of the original PGC cell or the user-defined PGC cell are determined by the time map information TMAPI included in each M_VOBI # i in FIG. It is converted into a file pointer from the top of the VRO file and converted into a physical address by the file system.

  In order to reproduce each cell, the corresponding VOB number, reproduction start time, and reproduction end time are described as cell information. When playing back a cell, the playback start and end times are passed to the corresponding VOBI, converted to a file pointer that points to the VOBU corresponding to the playback time of the cell, using the time map (TMAP) included in the VOBI, and It is converted into a physical address by the file system and the VOB is accessed.

  For example, video data (VOBS) recorded in the audio / video data area DA2 in FIG. 2 is composed of a group of one or more program chains PGC. Each PGC is a collection of programs that are one or more cell sets, and it is possible to determine which cells are reproduced in what order to constitute a program based on original PGC information or user-defined PGC information. Yes.

  The playback time and the playback order of the cells specified by the original PGC information or user-defined PGC information are based on the contents of the time map information TMAPI shown in FIG. 14 (time map TMAP shown in FIG. 28). Is converted to the address of the VOBU to be used.

  That is, when playback is performed in the original PGC (cell playback order in the first recording state), the VOBU address of the time zone to be played back is obtained via the time map information (TMAP) according to the contents of ORG_PGCI in FIG. Playback is performed in that order.

  On the other hand, when playback is performed with a PGC uniquely defined by the user (for example, when the playback order after recording is edited by the user), the time zone to be played back via the time map information (TMAP) according to the contents of UD_PGCI in FIG. VOBU addresses are obtained, and reproduction is performed in that order.

  The cell playback order based on the user-defined PGC information UD_PGCI can be completely different from the cell playback order based on the original PGC information ORG_PGCI.

  The playback time and the address of the playback target VOBU can be associated with each other by referring to the contents of the time entry and VOBU entry in the time map information TMAPI shown in FIG.

  FIG. 29 is a block diagram illustrating an example of the configuration of an apparatus (RTR video recorder) that performs real-time recording / reproduction of a video program or the like using the recordable / reproducible optical disc 10 of FIG.

  The apparatus main body of the RTR video recorder shown in FIG. 29 is roughly divided into disk drive units (32, 34) that rotate and drive the DVD-RAM or DVD-R disk 10 and read / write information from / to the disk 10. Etc.), an encoder unit 50 constituting the recording side, a decoder unit 60 constituting the reproduction side, and a microcomputer block 30 for controlling the operation of the apparatus main body.

  The encoder unit 50 includes an ADC (analog / digital converter) 52, a video encoder (V encoder) 53, an audio encoder (A encoder) 54, a sub-picture encoder (SP encoder) 55, a formatter 56, and a buffer memory. 57.

  The ADC 52 receives an external analog video signal + external analog audio signal from the AV input unit 42 or an analog TV signal + analog audio signal from the TV tuner 44. The ADC 52 digitizes the input analog video signal with, for example, a sampling frequency of 13.5 MHz and a quantization bit number of 8 bits.

  Similarly, the ADC 52 digitizes the input analog audio signal with, for example, a sampling frequency of 48 kHz and a quantization bit number of 16 bits.

  When an analog video signal and a digital audio signal are input to the ADC 52, the ADC 52 allows the digital audio signal to pass through.

  On the other hand, when a digital video signal and a digital audio signal are input to the ADC 52, the ADC 52 allows the digital video signal and the digital audio signal to pass through.

  A digital video signal component from the ADC 52 is sent to a formatter 56 via a video encoder (V encoder) 53. The digital audio signal component from the ADC 52 is sent to the formatter 56 via the audio encoder (A encoder) 54.

  The V encoder 53 has a function of converting an input digital video signal into a digital signal compressed at a variable bit rate based on the MPEG2 or MPEG1 standard.

  The A encoder 54 has a function of converting the input digital audio signal into a digital signal (or linear PCM digital signal) compressed at a fixed bit rate based on the MPEG or AC-3 standard.

  When the DVD video signal is input from the AV input unit 42, or when the DVD video signal is broadcast and received by the TV tuner 44, the teletext signal component in the DVD video signal is input to the SP encoder 55. The The sub-picture data input to the SP encoder 55 is arranged in a predetermined signal form and sent to the formatter 56.

  The formatter 56 performs predetermined signal processing on the input video signal, audio signal, sub-picture signal, etc. while using the buffer memory 57 as a work area, and records data that conforms to a predetermined format (file structure). Is output to the data processor 36.

  Here, a standard encoding process for creating the recording data will be briefly described. That is, when the encoding process is started in the encoder unit 50 in FIG. 29, parameters necessary for encoding video data and the like are set. Next, the main video data is pre-encoded using the set parameters, and the optimal code amount distribution for the set average transfer rate (recording rate) is calculated. Based on the code amount distribution obtained by the pre-encoding in this way, the main video is encoded. At this time, audio data is also encoded at the same time.

  As a result of pre-encoding, if the amount of data compression is insufficient (when the desired video program does not fit on the DVD-RAM disc or DVD-R disc to be recorded), if there is an opportunity to pre-encode again (for example, recording) Main video data is partially re-encoded, and the main video data of the re-encoded part is pre-encoded before that). Replaced with the data part. By such a series of processing, main video data and audio data are encoded, and the average bit rate value required for recording is greatly reduced.

  Similarly, parameters necessary for encoding the sub-picture data are set, and the encoded sub-picture data is created.

  The main video data, audio data, and sub-video data encoded as described above are combined and converted into a DVD_RTR video structure.

  The encoded main video data, audio data, and sub-video data are subdivided into packs of a certain size (2048 bytes) as shown in FIG. A dummy pack is appropriately inserted into these packs. Note that time stamps such as PTS (presentation time stamp) and DTS (decode time stamp) are appropriately described in packs other than the dummy pack. For the sub-picture PTS, a time arbitrarily delayed from the PTS of the main picture data or audio data in the same reproduction time zone can be described.

  And each data cell is arrange | positioned per VOBU so that it can reproduce | regenerate in the time code order of each data, and VOB comprised by a some cell is comprised. One or more RTR_MOV. A VRO file is formatted with the structure of FIG.

Note that when a DVD playback signal is digitally copied from a DVD video player, the contents of the cell, program chain, management table, time stamp, etc. are determined from the beginning, so there is no need to recreate them. (However, in order to configure the RTR video recorder so that the DVD playback signal can be digitally copied, an electronic watermark or other copyright protection means must be taken.)
The disk drive unit that executes reading / writing (recording and / or reproduction) of information on the DVD disk 10 includes a disk drive 32, a temporary storage unit 34, a data processor 36, and a system time counter (or system time clock; STC). 38).

  The temporary storage unit 34 buffers a certain amount of data written to the disk 10 via the disk drive 32 (data output from the encoder unit 50) or reproduces it from the disk 10 via the disk drive 32. This is used to buffer a certain amount of the data (data input to the decoder unit 60).

  For example, when the temporary storage unit 34 is composed of a 4 Mbyte semiconductor memory (DRAM), it is possible to buffer recording or reproduction data for approximately 8 seconds at an average recording rate of 4 Mbps. Further, when the temporary storage unit 34 is composed of a 16 Mbyte EEPROM (flash memory), it is possible to buffer the recording or reproduction data of about 30 seconds at an average recording rate of 4 Mbps. Furthermore, when the temporary storage unit 34 is composed of a 100 Mbyte ultra-small HDD (hard disk), it is possible to buffer recording or reproduction data for 3 minutes or more at an average recording rate of 4 Mbps.

  The temporary storage unit 34 can be used to temporarily store recording information until the disk 10 is replaced with a new disk when the disk 10 is used up during recording.

  The temporary storage unit 34 can also be used to temporarily store data read out from the normal drive within a fixed time when a high-speed drive (double speed or higher) is used as the disk drive 32. . If the read data at the time of reproduction is buffered in the temporary storage unit 34, even if an optical pickup (not shown) causes a read error due to vibration shock or the like, the reproduction data buffered in the temporary storage unit 34 is switched and used. As a result, it is possible to prevent the playback video from being interrupted.

  Although not shown in FIG. 29, if an external card slot is provided in the RTR video recorder, the EEPROM can be sold separately as an optional IC card. If the RTR video recorder is provided with an external drive slot or a SCSI interface, the HDD can be sold as an optional expansion drive.

  When a personal computer with a DVD-RAM drive is converted into an RTR video recorder by software (not shown), a part of the free area of the hard disk drive of the personal computer itself or a part of the main memory is shown in FIG. The temporary storage unit 34 can be used.

  The data processor 36 in FIG. 29 supplies the DVD_RTR recording data from the encoder unit 50 to the disk drive 32 according to the control of the microcomputer block 30, takes out the DVD_RTR playback signal reproduced from the disk 10 from the drive 32, Management information (part of the file data in FIG. 5) recorded on the disk 10 is rewritten, or data (part or all of the file) recorded on the disk 10 is deleted.

  The microcomputer block 30 includes an MPU (or CPU), a ROM in which a control program and the like are written, and a RAM that provides a work area necessary for executing the program.

  The MPU of the microcomputer block 30 uses the RAM as a work area according to a control program stored in the ROM, and uses an entry point registration process, a text information input process, a reproduction menu display process, and a text information search process (described later). Recording content search processing), defect registration processing, priority deletion order registration processing, and the like are executed.

  In these processes, data input by the user of the RTR video recorder (such as text input of a short title of the recorded content) is provided from the information input unit 100 to the MPU 30. As this information input unit 100, although not shown, a keyboard of a personal computer or a cursor key / ten key of a remote controller can be used.

  The contents to be notified to the user of the RTR video recorder among the execution results of the MPU 30 are displayed on the display unit 48 of the RTR video recorder. The notification content is appropriately displayed on the monitor display using an on-screen display (OSD), a sub-picture, or the like.

  Note that the timing at which the MPU 30 controls the disk drive 32, the data processor 36, the encoder unit 50, and / or the decoder unit 60 can be executed based on the time data from the STC 38. Is executed in synchronization with the time clock from the STC 38, but other processing may be executed at a timing independent of the STC 38).

  The MPU 30 can also execute processing such as the recording date and time of each program recorded on the disk 10 and the registration date and time of the entry point based on the time data from the time measuring unit 40.

  The decoder unit 60 is separated by a separator 62 that separates and extracts each pack from DVD_RTR playback data having a pack structure as shown in FIG. 3, a memory 63 that is used when performing pack separation and other signal processing, and the separator 62. A video decoder (V decoder) 64 for decoding main video data (contents of the video pack), a sub-picture decoder (SP decoder) 65 for decoding sub-video data (contents of the sub-picture pack) separated by the separator 62, An audio decoder (A decoder) 68 that decodes the audio data (the contents of the audio pack) separated by the separator 62 and the video data from the V decoder 64 are appropriately combined with the sub-picture data from the SP decoder 65 to form the main video. Overlay menus, highlight buttons, subtitles and other sub-pictures A digital video output from the video processor 66, a video / digital / analog converter (V / DAC) 67 for converting the digital video output from the video processor 66 into an analog video signal, and an analog audio signal from the digital audio output from the A decoder 68. An audio / digital / analog converter (A / DAC) 69 for conversion is provided.

  The analog video signal from the V • DAC 67 and the analog audio signal from the A • DAC 69 are supplied to an external component (not shown) (2-channel to 6-channel multi-channel stereo apparatus + monitor TV or projector) via the AV output unit 46. Is done.

  The OSD data that is appropriately output from the MPU 30 is input to the video processor 66 in the decoder unit 60. Then, the OSD data is superimposed on the main video and supplied to the external monitor TV connected to the AV output unit 46. Then, various text information is displayed together with the main video.

  Data processing in an RTR video recorder can be broadly divided into two types: recording processing and playback processing.

  FIG. 30 is a flowchart for explaining an example of the recording operation in the RTR video recorder of FIG.

  First, when the MPU 30 receives a recording command by a remote control operation by a user or a timer recording program (not shown), the MPU 30 reads management data (such as a file system) from the disk 10 (FIG. 1) set in the drive 32 ( Step ST10), a recording area (writing area) is determined.

  If there is no unrecorded area or overwrite-erasable area on the disk 10 and there is no free space (No in step ST12), a warning message “no recording space” is displayed (step ST14). Cancel.

  If there is free space (Yes in step ST12), the write address is determined (step ST16), and the necessary write in the management area (RTR_VMG file, etc.) is performed so that recording (writing) is performed in the determined area. Is performed (step ST18).

  Next, initial setting for recording is performed (step ST20). That is, the average transfer rate is set for each encoder of the encoder unit 50 in FIG. 29 (for example, 4 Mbps), the STC 38 is reset to a predetermined value (for example, zero), the write start address is set for the drive 32, and the formatter 56 is set. Initialization (for example, for NTSC recording by MPEG2 / 4 Mbps), registration setting of dummy packs (FIGS. 3 to 4), cell delimiter time is set to a predetermined value, and the number of cell entry point information C_EPI_Ns (FIG. 24) is set to zero.

  When the above initial setting is completed, a recording start command is set to each encoder of the encoder unit 50, recording starts (step ST22), and recording processing (step ST23) starts.

  The flow of the video signal in the recording process (step ST23) is as follows.

  First, an AV signal input to the external AV input 42 or a broadcast signal received by the TV tuner 44 is A / D converted by the ADC 52. The A / D converted digital video signal is input to the A encoder 54. Also, a closed caption signal included in the broadcast or a text signal such as a character broadcast is input from the TV tuner 44 to the SP encoder 55.

  Each encoder compresses the signal input thereto by a predetermined method, cuts the signal into 2048 peat per pack, and inputs the packet to the formatter 56.

    Here, each decoder determines the PTS (presentation time stamp or reproduction time stamp) and DTS (decoding time stamp) of each packet according to the count value from the STC 38, and performs recording.

  The formatter 56 temporarily stores the packet data in the buffer memory 57, then packs each input packet data, mixes it for each GOP, and transfers it to the data processor 36.

  The data processor 36 groups the transferred packs (2 kbytes) into groups of 16 packs (32 kbytes), performs ECC processing using a product code, for example, and sends it to the disk drive 32.

  At this time, if the drive 32 is not ready for recording, the recording signal from the data processor 36 is transferred to the temporary storage unit and waits until the drive 32 completes preparation for data recording. When the data recording is ready, the drive 32 starts recording.

  Here, a large-capacity memory is used as the temporary storage unit 34 in order to hold recording data for several minutes or more by high-speed access.

  While the recording process continues, a process of automatically registering entry points at a predetermined time interval (for example, every 5 minutes) is performed (step ST25; see FIG. 33). The entry point registration time interval can be arbitrarily set by the user in units of 1 minute, for example. If this time interval is set to be longer than the free space (recordable time) of the disc 10, entry points are not automatically registered.

  During recording (NO in step ST27), when the user requests entry point registration (yes in step ST29), entry point registration is performed separately from step ST25 (step ST31; see FIG. 32).

  For example, an entry point key is provided in a remote controller (not shown), and when this entry point key is pressed during recording processing, entry point information (FIG. 25) is registered at a location corresponding to the recording content at that time.

  At this time, the MPU 30 records the entry point information in the management information (the RTR_VMG file in FIG. 5) in response to the entry point registration request from the user or the set (RTR video recorder).

  When the recording ends (YES in step ST27), each encoder and formatter in the encoder unit 50 is initialized, predetermined management information is sent to the drive 32, and this is recorded in the RTR_VMGI of the disk 10 (step ST34).

  FIG. 31 is a flowchart for explaining an example of the reproduction operation in the RTR video recorder of FIG.

  First, when the MPU 30 receives a playback command by a remote control operation by a user or a timer playback program (not shown), the MPU 30 reads the management area (RTR_VMG) of the disk 10 via the drive 32 and the data processor 36 (step ST40). Determine the playback address.

  The MPU 30 selects a program chain and a program to be reproduced based on the read management data (step ST42), and sets a reproduction start command to each decoder of the decoder unit 60 (step ST44).

  Next, the MPU 30 sends the determined reproduction address and read command to the drive 32, and enters reproduction processing (step ST46).

  The drive 32 reads the sector data of the disk 10 (FIG. 1) according to the read command sent, performs error correction by the data processor 36, and outputs it to the decoder unit 60 in the form of pack data.

  In the decoder unit 60, the separator 62 receives the read pack data. The separator 62 packetizes the received data, and depending on the type of data (video, audio, sub-picture, etc.), the video packet data (MPEG video data) is transferred to the V decoder 64, and the audio packet data is the A decoder. 68, and the sub-picture packet data is transferred to the SP decoder 65.

  At the start of packet data transfer to each decoder, the SCR (system clock reference or reference system clock) is loaded into the STC 38. Each decoder performs a reproduction process in synchronization with the value of PTS (see FIG. 3) in the packet data (specifically, comparing the values of PTS and STC). As a result, a moving image with audio subtitles synchronized with the video can be reproduced.

  If there is a reproduction request for the entry point of a specific cell during reproduction (Yes in step ST50), the EP_PTM (see FIG. 25) of the target entry point is converted into a file pointer by TMAP (see FIG. 14), and the entry point is corresponded. VOBU (see FIG. 28) is accessed (step ST52).

  If there is no entry point reproduction request (NO in step ST50), the reproduction process is continued.

  If there is an entry point registration request during playback processing (Yes in step ST54), entry point registration processing can be performed (step ST31). This entry point registration process may be the same process as the entry point registration process during recording (ST31 in FIG. 30).

  When the reproduction is finished (Yes in step ST48), after waiting until the VOBU being reproduced at the point of time is finished, the decoding is set in each decoder of the decoding unit 60 (step ST58). The process ends.

  FIG. 32 shows a process when the user or recording / reproducing device makes a request to register an entry point for a specific video or audio while the RTR video recorder (recording / reproducing device) is recording or reproducing. It is a flowchart explaining an example. This entry point registration process corresponds to step ST31 in FIG.

  When receiving the entry point registration request from the user or the recording / reproducing apparatus (step ST310), the MPU 30 of the RTR video recorder (recording / reproducing apparatus) in FIG. 29 increments C_EPI_Ns (FIG. 24) in the movie cell general information M_C_GI by one. (Step ST312).

  When there is no entry point registration request, C_EPI_Ns is set to “0”.

  The fact that C_EPI_Ns has been incremented by one means that one entry point information can be added to the cell of the program that is currently being recorded (or reproduced). Therefore, the MPU 30 secures an area for movie cell entry point information (M_C_EPI) in the movie cell information (M_CI).

  After that, it is assumed that the user inputs text within a predetermined time (for example, within 30 seconds), or that the recording / playback apparatus gives closed captions or the like of the broadcast program being air-checked as text input (Yes in step ST314).

  Note that the text input here is not necessarily limited to character input, and includes, for example, input of an operation result in which the user selects a menu item or clicks an icon with a mouse.

  Then, the MPU 30 sets “1” to the entry point format EP_TY in the movie cell entry point information M_C_EPI (step ST316). This EP_TY = “1” indicates that the primary text information PRM_TXTI is included in M_C_EPI.

  Subsequently, the MPU 30 reads the current count value of the STC 38 and writes this read value in the entry point reproduction time EP_PTM (FIG. 25) in M_C_EPI (step ST320).

  Further, the MPU 30 reads the current time (year / month / day and hour, minute, second) from the time measuring unit 40, and writes the read value to the information date (FIG. 25) in the primary text information PRM_TXTI of the M_C_EPI (step ST322).

Thereafter, the MPU 30 writes the following attribute data (any one of 0 to 7) into the information type [1] in the primary text information PRM_TXTI (step ST324):
Information type [1] = 0; user mark (user registers entry point)
Information type [1] = 1; Set mark (Recorder / recorder registers entry point)
Information type [1] = 2; Defect start mark Information type [1] = 3; Defect end mark Information type [1] = 4; Playback start mark Information type [1] = 5; Playback end mark Information type [1] = 6; Unerasable mark Information type [1] = 7;
Here, [1] of the information type [1] means the first data field of the information type. If this first data field has a 3-bit configuration, the information type [1] can indicate 8 types of attributes, and if it has an 8-bit configuration, it can indicate 256 types of attributes.

  Specifically, the information type [1] = 0 when the user requests entry point registration, and the information type [1] = 1 when the recording / playback device, that is, a set of RTR video recorders, requests entry point registration. Become.

  Information type [1] = 2 for a defect start mark, which will be described later, and information type [1] = 3 for a defect end mark.

  Information type [1] = 4 for a reproduction start mark, which will be described later, and information type [1] = 5 for a reproduction end mark.

  The information type [1] = 6 for a non-erasable mark described later.

  In addition, when the entry point registration request is sent from a broadcasting station during broadcast program recording, or sent from a communication partner while downloading digital video data via a communication line, Information type [1] = 7.

  If there is no text input for the entry point during entry point registration processing (NO in step ST314), “0” is set in EP_TY (step ST318).

  Then, the MPU 30 sets “0” to EP_TY in the movie cell entry point information M_C_EPI (step ST316). This EP_TY = “0” indicates that there is no content in the primary text information PRM_TXTI in M_C_EPI.

  In this case, PTS is set in EP_PTM (step ST330), predetermined contents are entered in information type [1] in PRM_TXTI (step ST324), and the entry point registration process is terminated.

  FIG. 33 is a flowchart for explaining an example of entry point automatic registration processing (registering entry points at regular time intervals) in the RTR video recorder of FIG.

  In this process, entry points are automatically registered at a predetermined time interval (without interrupting the recording operation) regardless of the content of the video image or audio to be recorded.

  First, the user makes initial settings before starting recording. That is, the numerical value of the parameter a that designates the entry point registration interval in minutes is set by the user, and the index parameter n is preset to 1 (step ST200).

When the user does nothing, a predetermined default value (for example, a = 5 at 5 minute intervals or a = 0 for prohibiting automatic registration of entry points) is selected as parameter a, and n is preset to 1. When the recording is started after the initial setting at the start of recording is completed, the entry point constant interval registration process is executed, for example, at the timing of step ST25 in FIG.

  That is, first, STC indicating the elapsed recording time is compared with a × n × 5400000 (corresponding to an amount when an 90 kHz clock is used) (step ST250).

  If an an minute (an = 5 minutes at first) has not yet elapsed after the start of recording (NO in step ST250), the process returns to the recording process ST23 in FIG.

  When an minute (an = 5 minutes) has elapsed after the start of recording (Yes in step ST250), for example, the entry point registration process described with reference to FIG. 32 is executed (step ST31).

  When entry point registration at that time (fifth minute from the start of recording) is completed, the index parameter n is incremented by one (step ST252), and the process returns to the recording process ST23 of FIG.

  If an an amount (an = 10 minutes next) has not elapsed after the start of recording (NO in step ST250), the process returns to the recording process ST23 in FIG.

  When an minute (an = 10 minutes) has elapsed after the start of recording (Yes in step ST250), for example, the entry point registration process described with reference to FIG. 32 is executed (step ST31).

  The above operation is repeated until the recording is completed. As a result, for example, when a television broadcast program of 54 minutes is recorded, 10 entry points are automatically registered there every 5 minutes.

In addition, as a case where the RTR video recorder automatically enters entry points, in addition to the case of registration at a fixed time interval not related to the recording contents described above,
When recording starts, when recording ends, when recording is paused, when playback starts, when playback ends, when playback is paused, when the video image to be recorded changes, or when the video audio to be recorded changes There is.

  For example, it is possible to detect the switching of the audio level of the recording source (whether or not the audio of a predetermined level or lower has continued for a certain period of time) and automatically register the entry point at the detection part.

  Alternatively, a scene change is detected from a change in the MPEG video data of the recording source (if the image content changes suddenly due to a scene change, the video compression rate decreases, so the buffer capacity in the MPEG encoder is consumed rapidly in a short time). Thus, entry points can be automatically registered at the detection part.

  FIG. 34 is a flowchart for explaining an example of text information input processing in the RTR video recorder of FIG.

  First, the MPU 30 reads management data (such as RTR_VMG in FIGS. 5 and 6) from the disk 10 (step ST100). By this reading, the MPU 30 appropriately knows the information content of the playlist (FIGS. 8 to 11), the information content of the PGC (FIGS. 19 to 21), and the content of the movie cell information M_CI (FIGS. 23 to 25). Will be able to.

  Next, the MPU 30 reads the contents of the movie cell entry point information M_C_EPI of all entry points from the read management data (step ST102).

  That is, the MPU 30 selects and extracts entry points of entry point format EP_TY = “01b” (with primary text information PRM_TXTI) from M_C_EPI (FIG. 25) for each entry point. Next, for the entry point with PRM_TXTI, the entry point reproduction time EP_PTM and primary text information PRM_TXTI are read. Then, the information type, information date, and text information of the entry point are read from the read PRM_TXTI.

  This M_C_EPI reading process is repeated while there is an unprocessed entry point (NO in step ST104).

  When there are no remaining entry points that have not been subjected to the M_C_EPI read process (YES in step ST104), the MPU 30 outputs input menu information to the monitor based on the read contents (step ST106).

  In this input menu, for example, as illustrated in FIG. 35, the playback time (hour, minute) based on EP_PTM, the title based on the text information of PRM_TXTI, the thumbnail image based on THM_PTRI (FIG. 10), and the information type of PRM_TXTI And the mark recording date and time (year / month / day, hour, minute) based on the information date of PRM_TXTI are classified by item and sorted and displayed in order of playback time (or recording time).

  The user moves the cursor to a predetermined line position of the title portion in the menu using a cursor key operation of an unillustrated remote controller or an optional keyboard, etc., and selects an entry point to input text (step ST108). . Thereby, the user can input a desired text to the target entry point by operating the remote controller or the keyboard (step ST110).

The above text input is executed for all entry points desired by the user (YES in steps ST112 and ST106 to ST110).
When the text input is completed for all the entry points desired by the user (NO in step ST112), the text information (FIG. 25) in the PRM_TXTI of M_C_EPI is updated to the content illustrated in FIG. 35 (step ST114). Is written in a predetermined area of the management data (RTR_VMG) (step ST116).

  As described above, text information or the like desired by the user is input to the entry point desired by the user, and the contents are registered in the corresponding disk 10 (FIG. 1).

  FIG. 36 schematically shows a state when information as illustrated in FIG. 35 is registered in the disk 10 by the processing of FIG.

  In FIG. 36, the RTR video recorder automatically sets the entry point attribute “10” at the start of recording at the recording time 00′00 ″ and the entry point attribute “10” at the end of recording at the recording time 02′00 ”. Indicates that an entry point has been inserted. Here, the recording date and time is written based on the time data from the timing unit 40 in FIG. 29, and the text “Cinderella” is automatically taken out from the closed caption at the beginning of the broadcast program (text-containing broadcast). is there.

  The three entry points of disc recording times 00'30 ", 01'00", and 01'10 "indicate portions overwritten by user operation in the middle of the recorded program called Cinderella. The attribute of the point is “00” of the user mark, and the recording date / time is also far from the recording date / time of Cinderella.

  At the entry point by this user, the image of that portion (a reduced version of the MPEG I picture) is taken out as a thumbnail, and this thumbnail is stored in the playlist search pointer PL_SRP (FIG. 10) as part of the entry point data. Registered in THM_PTRI.

  In FIG. 37, the thumbnail is not registered as shown in FIG. 36. Instead, the user inputs text at the entry point, and the text information is registered in PRM_TXTI (FIG. 25) of the movie cell entry point information M_C_EPI. The case is illustrated.

  FIG. 38 is a flowchart for explaining an example of a playback menu display process in the RTR video recorder of FIG.

  First, the MPU 30 reads management data (such as RTR_VMG) from the disk 10 (step ST700). By this reading, the MPU 30 appropriately knows the information content of the playlist (FIGS. 8 to 11), the information content of the PGC (FIGS. 19 to 21), and the content of the movie cell information M_CI (FIGS. 23 to 25). Will be able to.

  Next, MPU 30 reads the contents of movie cell entry point information M_C_EPI of all entry points from the read management data (step ST702).

  That is, the MPU 30 selects and extracts entry points of entry point format EP_TY = “01b” (with primary text information PRM_TXTI) from M_C_EPI (FIG. 25) for each entry point. Next, the primary text information PRM_TXTI is read, and the information type [1] of the entry point is read.

The description of this information type [1] is:
Information type [1] = 0; user mark (user registers entry point)
Information type [1] = 1; Set mark (Recorder / recorder registers entry point)
Information type [1] = 2; Defect start mark Information type [1] = 3; Defect end mark Information type [1] = 4; Playback start mark Information type [1] = 5; Playback end mark Information type [1] = 6; Unerasable mark Information type [1] = 7;
It has become.

  If the read information type [1] is 0 (user mark) or 1 (set mark) (Yes in step ST703), the MPU 30 further reads the information date and text information from the primary text information PRM_TXTI (step ST704).

  When the read information type [1] is neither 0 nor 1 (NO in step ST703), step ST704 is skipped.

  The M_C_EPI information reading process (ST702 to ST704) is repeated while there is an unprocessed entry point (NO in step ST706).

  By repeating this process, the MPU 30 can capture all the movie cell information of the entry point of the user mark or set mark.

  When there are no remaining entry points that have not been subjected to the M_C_EPI reading process (YES in step ST706), the MPU 30 outputs reproduction menu information to the monitor based on the read contents (step ST708).

  In this playback menu, for example, as shown in FIG. 39, the playback time (hour, minute) based on EP_PTM, the title based on the text information of PRM_TXTI, the thumbnail image based on THM_PTRI (FIG. 10), and the information type of PRM_TXTI And the mark recording date and time (year, month, day, hour, minute) based on the information date of PRM_TXTI are classified for each item and sorted in order of playback time of entry points (or in order of mark recording time of entry points) And displayed.

  The user moves the title selection cursor to a desired line position in the reproduction menu, for example, by operating a cursor key of a remote controller (not shown), and selects an entry point to be reproduced from now on (step ST710).

  The MPU 30 converts the entry point reproduction time value of the entry point thus selected into a corresponding file pointer based on the time map information (FIGS. 14 to 16) (step ST712). By using this file pointer, the entry point playback time value is converted into a physical address (VOBU address) by the file system, and playback is started.

  FIG. 40 is a flowchart for explaining an example of text information search processing in the RTR video recorder of FIG.

  First, MPU 30 performs a process of displaying a reproduction menu for inputting a search keyword (step ST400).

  This search reproduction menu is used when a user inputs a keyword for performing a search for information recorded in M_C_EPI (FIG. 25) of each entry point.

  For example, as shown in FIG. 41, it is assumed that the user has input a search keyword so as to search all titles that include the character string “Cinderella” and are marked in January 1999 ( Step ST402).

  Then, the MPU 30 reads the management data (RTR_VMG) from the disc 10 and acquires the contents of the movie cell information M_CI of all recorded entry points (step ST404).

  Then, M_C_EPI is extracted from the acquired information, and the information date and text information are read from PRM_TXTI (FIG. 25) therein (step ST406).

  Next, the MPU 30 performs a search based on a keyword set by the user (including a character string “Cinderella” marked in January 1999).

  As a result, if an entry point matching the keyword is found (Yes in step ST408), the information type [1] of the entry point is read from the PRM_TXTI of the entry point (step ST410).

The description of this information type [1] is:
Information type [1] = 0; user mark (user registers entry point)
Information type [1] = 1; Set mark (Recorder / recorder registers entry point)
Information type [1] = 2; Defect start mark Information type [1] = 3; Defect end mark Information type [1] = 4; Playback start mark Information type [1] = 5; Playback end mark Information type [1] = 6; Unerasable mark Information type [1] = 7;
It has become.

  Based on the content of the read information type [1], for example, the entry point whose read information type [1] is other than 1 is excluded from the search result, and only the entry point portion written by the RTR video recorder at the time of recording is searched. Can be left in.

  Alternatively, when the read information type [1] is 2 (or 2X; X is an arbitrary integer value) and 3 (or 3X), the ECC error correction at the time of reproduction is failed at the recording location of the cell corresponding to the entry point. Defects (such as impossibility) and in some cases can be removed from the search results.

  If all the searches are completed and there are no unsearched entry points (Yes in step ST412), the MPU 30 displays the search results on the monitor as shown in FIG. 42, for example (step ST414).

  The MPU 30 converts the entry point reproduction time value of the entry point searched in this way into a corresponding file pointer based on the time map information (FIGS. 14 to 16) (step ST418). By using this file pointer, the entry point playback time value is converted into a physical address (VOBU address) by the file system, so that only the searched entry point mark portion can be selectively played back.

  FIG. 43 is a flowchart for explaining an example of defect registration processing in the RTR video recorder of FIG.

  This defect registration process is executed when the user desires to check a used disc.

  First, the MPU 30 reads the management data (RTR_VMG) (step ST500), and resets the defect flag to “0” (step ST502).

  This defect flag can be set in a part of the internal RAM or internal register of the MPU 30.

  Next, the disk 10 is reproduced (step ST504). This reproduction is the same processing as in step ST46 of FIG.

  Initially, the defect flag is “0” (Yes in step ST506). During reproduction, if there is no defect (ECC error correction failure) (NO in step ST508) and reproduction is not completed (NO in step ST516), reproduction is continued as usual (loop of steps ST504 to ST516).

  When a defect (ECC error correction failure) is found during reproduction (Yes in step ST508), the number C_EPI_Ns (FIG. 24) of cell entry point information is incremented by 1, and “1” is entered in the entry point format EP_TY (FIG. 25). Is set, the PTS (FIG. 3) at that time is set as the entry point playback time EP_PTM (FIG. 25), and the current date (date from the time measuring unit 40) is set as the information date (FIG. 25) in the primary text information PRM_TXTI. Data) is set (step ST510).

  Next, 2X (X is an arbitrary integer value) is set in the information type (FIG. 25) in primary text information PRM_TXTI (step ST512). The defect start point is registered by the information type set to 2X.

  Here, if a defect is found for the first time, the information type 2X is 20. If the detected defect is the second, the information type 2X is 21.

  When the defect start point is registered, the defect flag is set to “1” (step ST514).

  Thereafter, if the reproduction is not finished (NO in step ST516), the reproduction is continued (step ST504).

  Since the defect flag is set to “1” immediately before the continuous reproduction (NO in step ST506), this time, another processing loop is entered.

  First, the presence / absence of defects (presence / absence of ECC error correction failure) is checked. If the defect still continues (Yes in Step ST518) and the reproduction is not finished (No in Step ST526), the MPU 30 transfers data notifying the user that the defective part is being reproduced to the video decoder 64. Then, a warning character or warning mark indicating “currently reproducing a defective part” is displayed in a blue background on a monitor screen (not shown) (step ST528). Alternatively, if the (non-defective) I picture immediately before the defect flag is set to “1” remains in the video buffer (not shown) of the decoder unit 60, the I picture (still picture) is reproduced at the defective portion. It can also be transferred to the video decoder 64 with the intention of notifying the user of the inside.

  When the defect disappears after the defect flag is set to “1” (ECC error correction success), this is the end point of the defect portion.

  When reproduction of the defective portion is completed and ECC error correction functions normally (NO in step ST518), the number C_EPI_Ns (FIG. 24) of cell entry point information is incremented by 1, and the entry point format EP_TY (FIG. 25) is obtained. “1” is set, the PTS (FIG. 3) at that time is set as the entry point playback time EP_PTM (FIG. 25), and the current date (time counting unit 40) is set as the information date (FIG. 25) in the primary text information PRM_TXTI. (Date data from) is set (step ST520).

  Next, 3X (X is an arbitrary integer value) is set as the information type (FIG. 25) in the primary text information PRM_TXTI (step ST522). The defect end point is registered by the information type set to 3X.

  Here, if a defect is found for the first time, the information type 3X is 30. If the detected defect is second, the information type 3X is 31, and if it is third, 32.

  Here, 2X (20, 21, 22,...) In step ST512 is paired with 3X (30, 31, 32,...) In step ST522. That is, for the first defect, a pair of “20” and “30” is assigned as the information type of the entry point at the start point and the end point.

  When the defect end point is registered, the defect flag is reset to “0” (step ST524).

  Thereafter, if the reproduction is not finished (NO in step ST526), the reproduction is continued (step ST504).

  Since the defect flag is “0” at this time, the loop of steps STST 504 to 516 is executed until a new defect portion is reproduced.

  When reproduction is completed without any defects found (NO in step ST508, YES in step ST516), the information type 2X is not registered, and only the information type 3X is registered (step ST522). In this case, the aforementioned entry point pair is not established. This is a record that there were no defects during disc playback.

  FIG. 44 shows an example of entry points when two defects are found by the process of FIG.

  If the information type pair registered in steps ST512 and ST522 in FIG. 43 (contents of PRM_TXTI in FIG. 25) knows in advance where the defect exists in the disc, it can be determined how to play back that portion. . Therefore, the user wants a menu that allows the user to select how to play the defective portion. FIG. 45 shows an example of such a defect management menu.

  That is, even if there is a defect and there is a lot of MPEG block noise (or the digital audio tends to be distorted and is often interrupted), if the user wants to reproduce the content of that part, the user will see “Incomplete video. A playback method called “playback” can be selected.

  If the defect is hard to see, you can select a playback method that skips that part and displays a warning on the monitor with a blue background during the skip operation.

  Alternatively, instead of the blue back / warning display, it is possible to select a playback method of “warning display is performed with the still picture of the I picture immediately before the error occurs”.

  Data relating to the reproduction method can be registered somewhere in M_C_EPI in FIG. 25 (for example, as a kind of information type).

  FIG. 46 is a flowchart for explaining an example of preferential erasure order registration processing in the RTR video recorder of FIG.

  First, the MPU 30 reads management data (RTR_VMG etc.) from the disk 10 (step ST600). By this reading, the MPU 30 appropriately knows the information content of the playlist (FIGS. 8 to 11), the information content of the PGC (FIGS. 19 to 21), and the content of the movie cell information M_CI (FIGS. 23 to 25). Will be able to.

  Next, MPU 30 reads the contents of movie cell entry point information M_C_EPI of all entry points from the read management data (step ST602).

  That is, the MPU 30 selects and extracts entry points of entry point format EP_TY = “01b” (with primary text information PRM_TXTI) from M_C_EPI (FIG. 25) for each entry point. Next, the primary text information PRM_TXTI is read, and the information type [1] of the entry point is read.

The description of this information type [1] is:
Information type [1] = 0; user mark (user registers entry point)
Information type [1] = 1; Set mark (Recorder / recorder registers entry point)
Information type [1] = 2; Defect start mark Information type [1] = 3; Defect end mark Information type [1] = 4; Playback start mark Information type [1] = 5; Playback end mark Information type [1] = 6; Unerasable mark Information type [1] = 7;
It has become.

  If the read information type [1] is 4 (reproduction start mark) or 6 (erasable mark) (YES in step ST603), the MPU 30 further reads the information date and text information from the primary text information PRM_TXTI (step ST604). ).

  When the read information type [1] is neither 4 nor 6 (NO in step ST603), step ST604 is skipped.

  The M_C_EPI information reading process (ST602 to ST604) is repeated while there is an unprocessed entry point (NO in step ST606).

  By repeating this process, the MPU 30 can capture all the movie cell information of the entry point of the reproduction start mark or the non-erasable mark.

  When there are no remaining entry points that have not been subjected to M_C_EPI read processing (Yes in step ST606), MPU 30 outputs erase menu information to the monitor based on the read contents (step ST608).

  In this erase menu, for example, as shown in FIG. 48, the playback time (hour, minute) based on EP_PTM, the title based on the text information of PRM_TXTI, the thumbnail image based on THM_PTRI (FIG. 10), and the information date of PRM_TXTI The playback date / time (year / month / day, hour, minute) based on the data and the erasure order (or non-erasable mark) based on the information type [0] of PRM_TXTI are classified for each item, and in order of playback time (or recording time ) Are displayed.

  Here, the information type [0] includes information type [0] = 4X (erase start point), information type [0] = 5X (erase end point), as illustrated in the entry point attribute column of FIG. Paired with.

  In this information type [0], the same value is written in order from 0 for each pair of movie cell information, but the same value as the movie cell information in other pairs must not be written.

  For example, in FIG. 47, the recorded video of the title “Piece” whose entry point attribute (information type [0]) is a pair of “40” and “50” (recording time is 00′30 ″ to 00′45 ″). In the erase menu of FIG. 48, the erase order is first, so if the remaining capacity of the disc is insufficient during recording, the recorded video titled “Piece” is overwritten and erased first. Become.

  The user uses the cursor key operation of the remote controller (not shown) or an optional keyboard or the like to move the cursor to a predetermined position in the erasure order portion in the menu of FIG. 48 and select an entry point for changing the erasure order. .

  When changing the erasure order of the cell of the selected entry point to low (Yes in step ST610), the entry to be changed (for both information type [1] = 4 and information type [1] = 5) The rank of the point information type [0] is decreased by 1 (for example, the erasure rank is lowered from the second place to the third place) (step ST612).

  On the other hand, when the deletion order is changed to high, in step ST612, the information type of the entry point to be changed [for both information type [1] = 4 and information type [1] = 5] 0] is increased by one (for example, the erasure order is raised from the second place to the first place).

If the deletion order is not changed (NO in step ST610) and the deletion is prohibited (YES in step ST614), 6 (erasable mark) is set in the information type [1] of the entry point (step ST616).

  When the above erasure order change or non-erasable mark setting is completed (Yes in step ST618), management data (RTR_VMG) in which information corresponding to PRM_TXTI in FIG. 25 is written is written to the disk 10 (step ST620).

  When the remaining capacity of the disk 10 is insufficient during this recording, the MPU 30 refers to the contents of the management data written in this manner as appropriate, so that the erasure order is in descending order (if the erasure order is not set, the recording date / time or playback Recording can be continued while overwriting and erasing a part of the disk 10 in entry point units in order of date and time.

  According to the embodiment of the present invention (real-time digital video recording / playback system), for example, when a book is being read, any recording such as video / audio can be performed with a sense that a bookmark is placed between a page being read or an important part. Marks (entry points) can be written or erased at locations.

  If information related to the mark (entry point) is appropriately recorded in a predetermined location (movie cell entry point information, etc.) of the medium, this information can be used during playback or recording (including overwriting / erasing) using the disc. Using the information, you can:

  1) It is possible to freely create an index as to what program is recorded on the disc.

  In other words, when the disc is set in the apparatus, the user can easily know the recorded contents of the mark location (entry point) and can start playback of the location with a simple operation.

  2) A desired program can be easily retrieved from various programs recorded on the disc.

  That is, when the disc is set in the apparatus (RTR video recorder), the user can search for the keyword of each mark location (entry point) by keyword. As a result of the search, it is possible to easily know only a desired program among various programs recorded on the disc and to start reproduction of the portion with a simple operation.

  3) Of the various programs recorded on the disc, it is possible to easily identify a portion that can be erased (overwritten recording) (or a portion that is not desired to be erased).

  In other words, if the disc is set in the apparatus, the user can easily know the priority of deletion or erasability of each mark location (entry point), and the erasure order or erasability / impossibility of the location. Impossibility can be changed with a simple operation. Marked programs that are not set to be non-erasable are automatically overwritten and erased according to the priority of erasure when a new recording is performed on the disc.

  4) When a defect occurs in a part of a recorded disc and normal reproduction of that part becomes impossible, the defective part that cannot be normally reproduced can be easily identified.

  That is, when the disc is set in the apparatus, the user can easily know whether or not each mark location (entry point) is defective. If there is a defect, the reproduction method of the portion (skip of the defect portion, blue back display during reproduction of the defective portion, still image reproduction immediately before the defect until reproduction of the normal portion, etc.) can be arbitrarily designated.

The figure explaining the structure of the optical disk which can be recorded / reproduced concerning one Embodiment of this invention. The figure explaining the structure of the digital information recorded on the optical disk of FIG. The figure explaining the data structure of the video object of FIG. The figure explaining the data structure of the dummy pack of FIG. The figure explaining the file structure of the digital information recorded on the optical disk of FIG. The figure explaining the data structure of the navigation data file (RTR_VMG) of FIG. The figure explaining the content of the video manager information management table (VMGI_MAT) of FIG. The figure explaining the data structure of the playlist search pointer table (PL_SRPT) of FIG. FIG. 9 is a diagram for explaining the contents of playlist search pointer table information (PL_SRPTI) in FIG. 8. The figure explaining the content of the playlist search pointer table (PL_SRP) of FIG. FIG. 11 is a diagram for explaining the contents of thumbnail pointer information (THM_PTRI) in FIG. 10. The figure explaining the data structure of the movie AV file information table (M_AVFIT) of FIG. The figure explaining the data structure of the movie VOB information (M_VOBI) of FIG. The figure explaining the data structure of the time map information (TMAPI) of FIG. The figure explaining the content of the time map general information (TMAP_GI) of FIG. The figure explaining the content of the time entry (TM_ENT) of FIG. The figure explaining the data structure of the user definition PGC information table (UD_PGCIT) of FIG. 6 is a diagram for explaining the data structure of the text data manager (TXTDT_MG). The figure explaining the data structure of PGC information (PGCI; information of original PGC or user-defined PGC). The figure explaining the content of the PGC general information (PGC_GI) of FIG. The figure explaining the content of the program information (PGI) of FIG. The figure explaining the data structure of the cell information (CI) of FIG. The figure explaining the data structure of the movie cell information (M_CI) of FIG. The figure explaining the content of the movie cell general information (M_C_GI) of FIG. The figure explaining the content of the movie cell entry point information (M_C_EPI) of FIG. The figure explaining the usage example of primary text information (PRM_TXTI). The figure explaining the example of a correspondence with each program which constitutes a program set, and each program part which constitutes a play list. A correspondence example between the reproduction start time / reproduction end time of the cells constituting the user-defined PGC (or the original PGC) and the offset address for the VOBU of each VOB constituting the movie video object (RTR_MOV.VRO) of FIG. Figure. FIG. 2 is a block diagram for explaining an example of the configuration of an apparatus (RTR video recorder) that performs real-time recording / reproduction of a video program or the like using the recordable / reproducible optical disc of FIG. The flowchart figure explaining an example of the video recording operation | movement in the apparatus of FIG. The flowchart figure explaining an example of the reproduction | regeneration operation | movement in the apparatus of FIG. The flowchart figure explaining an example of the entry point registration process in the apparatus of FIG. FIG. 30 is a flowchart for explaining an example of entry point automatic registration processing (entry point registration at regular time intervals) in the apparatus of FIG. 29; The flowchart figure explaining an example of the text information input process in the apparatus of FIG. The figure which shows an example of the text information input screen in the text information input process of FIG. FIG. 30 is a diagram for explaining an example of a relationship between a recorded video of an optical disc recorded by the apparatus of FIG. 29, an entry point, and information (attribute, recording date and time) of the recorded video. FIG. 30 is a diagram for explaining another example of the relationship between the recorded video of the optical disc recorded by the apparatus of FIG. 29, the entry point, and information (attribute, recording date and time) of the recorded video. The flowchart figure explaining an example of the reproduction | regeneration menu display process in the apparatus of FIG. The figure which shows an example of the reproduction | regeneration menu display screen in the reproduction | regeneration menu display process of FIG. The flowchart figure explaining an example of the text information search process in the apparatus of FIG. The figure which shows an example of the search keyword input screen in the text information search process of FIG. The figure which shows an example of the search result display screen in the text information search process of FIG. The flowchart figure explaining an example of the defect registration process in the apparatus of FIG. FIG. 44 is a diagram for explaining an example of a relationship between a defective portion of a recorded video detected by the process of FIG. 43 and an entry point. The figure which shows the example of a display of the defective part of the recorded video detected by the process of FIG. 43, and its reproduction | regeneration method. FIG. 30 is a flowchart for explaining an example of preferential erasure order registration processing in the apparatus of FIG. 29; The figure explaining an example of the relationship between the recorded video detected by the process of FIG. 46, the entry point, and the information (attribute, recording date, etc.) of the recorded video. The figure which shows the example of a display of the information (recording time, a title, a thumbnail, the last reproduction | regeneration date, etc.) of the video recording detected by the process of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Recordable / reproducible optical disk (DVD-RAM, DVD-RW or DVD-R); 11 ... Cartridge (in the case of DVD-RAM); 14 ... Transparent substrate (polycarbonate); 16 ... Light reflecting layer; Information recording layer (semi-transparent ROM layer or phase change recording RAM layer); 17B ... second information recording layer (phase change recording RAM layer or dummy layer); 19 ... reading surface; 20 ... adhesive layer; ... clamping area; 25 ... information area; 26 ... lead-out area; 27 ... lead-in area; 28 ... data recording area; 30 ... microcomputer block (MPU / ROM / RAM); 32 ... disk drive; 36: Data processor; 38 ... System time counter STC; 40 ... Timekeeping unit; 42 ... AV input unit; 44 ... V tuner (terrestrial broadcast / satellite broadcast tuner); 46 ... AV output section; 48 ... various information display sections (liquid crystal or fluorescent display panel); 50 ... encoder section; 52 ... ADC; 53 ... video encoder; 55 ... Sub-picture encoder; 56 ... Formatter; 57 ... Buffer memory; 60 ... Decoder unit; 62 ... Separator; 63 ... Memory; 64 ... Video decoder; 65 ... Sub-picture decoder; 66 ... Video processor; ... Audio decoder; 69 ... Audio DAC; 70 ... Volume / file structure area; 100 ... Information input section.

Claims (8)

A data area configured to store data of one or more video objects, and a management area configured to store management information for managing the video objects;
The video object is composed of data units including MPEG-encoded video information, the management information is configured to have original program chain information for managing a playback method of the video object, and the original program chain information is one or more. Program information and one or more pieces of cell information, movie cell information for managing playback of a video object of the video information is defined as the cell information, and the movie cell information is a playback location in the video object. The entry point information related to the entry point used for accessing the entry point is included, the entry point information is configured to include the text information related to the entry point, and the movie cell information is the movie. Include Le general information, in the configuration information medium as the movie cell general information including the end time information of the start time information and the corresponding cell of a corresponding cell,
The start time information is stored in the first four data units of the corresponding video object, and the end time information is stored in the last four data units of the corresponding video object;
Wherein the management information, the first and reproduction start time information of the video field, the last digital information medium, characterized in that it is configured to include a reproduction end time information of the video field of the video object of the video object. An information medium having a data area configured to store data of one or more video objects and a management area configured to store management information for managing the video objects, wherein the video objects are MPEG encoded The management information is configured to have original program chain information for managing a playback method of the video object, and the original program chain information includes one or more program information and one or more program information. The cell information is defined as the cell information, and movie cell information for managing the playback of the video object of the video information is defined as the cell information, and the movie cell information is used to access the playback location in the video object. Entry point Entry point information relating to the entry point, the entry point information comprising text information relating to the entry point, the movie cell information including movie cell general information, and the movie cell general information corresponding to the corresponding cell. The start time information is stored in the first four data units of the corresponding video object, and the end time information is stored in the corresponding video object. Stored in the last four data units of the object, and wherein the management information includes playback start time information of the first video field of the video object and playback start time information of the last video field of the video object Use digital information media In shall,
Recording the video object on the information medium;
A digital information recording method, wherein the management information is recorded on the information medium. An information medium having a data area configured to store data of one or more video objects and a management area configured to store management information for managing the video objects, wherein the video objects are MPEG encoded The management information is configured to have original program chain information for managing the playback method of the video object, and the original program chain information includes one or more program information and one or more program information. The cell information is defined as the cell information, and movie cell information for managing the playback of the video object of the video information is defined as the cell information, and the movie cell information is used to access the playback location in the video object. Entry point Entry point information relating to the entry point, the entry point information comprising text information relating to the entry point, the movie cell information including movie cell general information, and the movie cell general information corresponding to the corresponding cell. The start time information is stored in the first four data units of the corresponding video object, and the end time information is stored in the corresponding video object. The management information is stored in the last four data units of the object, and the management information includes playback start time information of the first video field of the video object and playback start time information of the last video field of the video object Use digital information media In shall,
Reproducing the management information from the information medium;
A digital information reproducing method, wherein the video object is reproduced from the information medium. An information medium having a data area configured to store data of one or more video objects and a management area configured to store management information for managing the video objects, wherein the video objects are MPEG encoded The management information is configured to have original program chain information for managing a playback method of the video object, and the original program chain information includes one or more program information and one or more program information. The cell information is defined as the cell information, and movie cell information for managing the playback of the video object of the video information is defined as the cell information, and the movie cell information is used to access the playback location in the video object. Entry point Entry point information relating to the entry point, the entry point information comprising text information relating to the entry point, the movie cell information including movie cell general information, and the movie cell general information corresponding to the corresponding cell. The start time information is stored in the first four data units of the corresponding video object, and the end time information is stored in the corresponding video object. The management information is stored in the last four data units of the object, and the management information includes playback start time information of the first video field of the video object and playback start time information of the last video field of the video object Use digital information media In shall,
Means for reproducing the management information from the information medium;
Means for reproducing the video object from the information medium;
A digital information reproducing apparatus comprising:   The management information includes movie video object information, the movie video object information includes movie video object information general information, and the movie video object information general information includes the playback start time information and the playback end time information of the video object. The digital information medium of claim 1 configured to include.   The management information includes movie video object information, the movie video object information includes movie video object information general information, and the movie video object information general information includes the playback start time information and the playback end time information of the video object. The digital information recording method according to claim 2, wherein the digital information recording method is included.   The management information includes movie video object information, the movie video object information includes movie video object information general information, and the movie video object information general information includes the playback start time information and the playback end time information of the video object. The digital information reproducing method according to claim 3, which is configured to include the digital information.   The management information includes movie video object information, the movie video object information includes movie video object information general information, and the movie video object information general information includes the playback start time information and the playback end time information of the video object. The digital information reproducing apparatus according to claim 4, configured to include the digital information reproducing apparatus.

Images