KR100632061B1 - Method for recording and reproducing more than one digital data stream sources - Google Patents

Abstract

The present invention relates to a plurality of digital data stream recording and reproducing methods for alternately selecting and recording a plurality of data streams onto a single recording medium such as a digital video disc, and a recording medium according thereto. A recording method comprising the steps of: simultaneously receiving signals provided from a plurality of different signal sources; Recording the plurality of simultaneously received signals into a single recording aggregate while dividing the plurality of signals by corresponding signal sources; And generating and recording reproduction order information corresponding to the number of the plurality of signal sources, respectively, for the single recording assembly, and inputting from a plurality of broadcast programs selected by a user or from another input source. While the plurality of data streams are alternately recorded on a single recording medium, such as a digital video disc, as a data packet of a transport packet unit or a pack unit, identification information for identifying each of the plurality of recorded data streams is obtained. By separately recording and generating management information, and in particular, reproduction order information for managing reproduction order, a plurality of data streams simultaneously input to one recording medium can be selectively recorded. Selectively play only the data stream requested by the user by using the identification information and the playback order information It will be very useful to help inventors.

Description

A method for recording and reproducing a plurality of digital data streams, and a recording medium according thereto {Method for recording and reproducing more than one digital data stream sources}

1 schematically shows a conventional digital broadcast data recording apparatus,

2 is a flowchart illustrating an operation for tuning a conventional digital broadcast data recording apparatus.

3 schematically shows a plurality of digital data stream recording apparatuses according to the present invention,

4 is a diagram of a plurality of data streams recorded according to an embodiment of the present invention,

5 is a diagram of a plurality of data streams recorded according to another embodiment of the present invention,

6 shows reproduction sequence information recorded separately according to the present invention;

7 shows details of the reproduction order information recorded separately according to the present invention.

※ Explanation of code for main part of drawing

11: tuning unit 12: recording processing unit

13 recording medium 14 control unit

20: buffer 21: A / D and encoding processing unit

111,112,113: buffer and channel selector

The present invention provides a plurality of digital data for generating and recording identification information and management information for identifying and managing a plurality of recorded data streams while simultaneously simultaneously recording a plurality of data streams on one recording medium such as a digital video disc. The present invention relates to a stream recording and reproducing method, and a recording medium.

Fig. 1 schematically shows a digital recording device that is proposed as a device for recording current digital broadcast data. The digital broadcast data recording device includes an antenna for receiving digital broadcast such as terrestrial, satellite, or cable broadcast. A tuner section 1 for tuning the broadcast channel of a specific repeater from (ANT); A channel decoder (2) for selecting a digital broadcast program corresponding to any one channel among the broadcast channels of the selected repeater and decoding the original audio and video signal; A recording processor (3) for processing the decoded audio and video signals into a digital data stream and recording them on a recording medium (4) such as a digital video disc; And a controller 5 for controlling the tuning operation of the tuner 1 and the decoding operation of the channel decoder 2 according to a user's selection.

In the digital recording apparatus configured as described above, a plurality of broadcast programs are multiplexed and transmitted in the form of a transport stream through a digital broadcast reception antenna (ANT) that first receives digital broadcasts such as terrestrial, satellite, or cable broadcasts. When the digital broadcast signal is input to the tuner unit 1, the tuner unit 1 tunes a broadcast channel of a specific repeater including a broadcast program corresponding to a channel number selected by a user, and broadcasts the specific repeater. The channel tuning operation is performed by using program specification information (PSI: Program Specific Information, hereinafter referred to as PSI) included in the digital broadcasting signal and provided from a broadcasting station. The channel control operation will be described below with reference to FIG.

First, when a user inputs a channel number including a desired broadcast program and transmits the selected channel number using the PSI information (S10), a program association table (PAT: hereinafter called 'PAT') of the relay currently being received. Information is received (S11), and whether or not the corresponding channel number selected and input by the user exists in the received PAT information is detected and determined (S12).

If the corresponding channel number selected by the user does not exist in the received PAT information as a result of the determination, a network packet identifier (PID: Packet Identifier, hereinafter referred to as 'PID') recognized in the PAT information is accessed, and the network information table is accessed. (NIT: Network Information Table, hereinafter referred to as 'NIT') Receives information (S13), and from the received NIT information change the receiving repeater to any specific repeater that may include the channel number selected by the user (S14) do.

Subsequently, a series of operations (S11 to S12) of receiving the changed PAT information again are repeated, and if the corresponding channel number selected by the user exists in the received PAT information as a result of the determination, within the received PAT information. Access the program map, ie, the program map packet identifier (PID: Packet Identifier, hereinafter referred to as 'PID') corresponding to the channel number of the program map table (PMT: Program Map Information, referred to as 'PMT'). Receive the information (S15).

Subsequently, a stream packet (Packet) of a transport stream having a basic PID is separated for each data stream (video, audio, etc.) corresponding to the channel number in the PMT information (S16), and the packet from which the PID is separated is decoded. (S17) and outputs the original video and audio signal to the recording processing section 3.

As described above, the controller 5 controls the tuning operation of the tuner 1 to receive the broadcast program of the corresponding channel number selected by the user using the PSI information to tune the broadcast channel of the specific repeater. Meanwhile, only the broadcast program corresponding to the channel number selected by the user among the plurality of broadcast programs received from the specific repeater is decoded by controlling the decoding operation of the channel decoder 2 so that the original video signal and the audio signal are decoded. In addition to displaying and outputting the screen to an A / V output device such as a television, the decoded original video signal and audio signal are encoded by the recording processor 3, and then a recording medium 4 such as a digital video disc. To be recorded on the

Therefore, the broadcast program corresponding to the channel number selected and input by the user is displayed on the A / V output device such as a television and outputted as audio, and also recorded as a data stream on a recording medium such as a digital video disc.

However, in the conventional digital broadcast data recording apparatus constructed and operated as described above, since only one broadcast program selected by a user can be recorded on one recording medium, a plurality of digital broadcast programs multiplexed and simultaneously transmitted are plural in number. There is a problem that it is not possible to select and record on one recording medium, and in order to record a plurality of broadcast programs simultaneously, there is a problem that another digital broadcast data recording apparatus is additionally required.

Accordingly, the present invention has been created to solve the above problems, and simultaneously records a plurality of broadcast programs selected by a user on one recording medium such as a digital video disc, and when requested to play, broadcasts requested from the recorded data. It is an object of the present invention to provide a plurality of digital data stream recording and reproducing methods for selectively reproducing a program, and a recording medium accordingly.

According to an aspect of the present invention, there is provided a method of recording a plurality of digital data streams comprising the steps of: simultaneously receiving signals provided from a plurality of different signal sources; Recording the plurality of simultaneously received signals into a single recording aggregate while dividing the plurality of signals by corresponding signal sources; And generating and recording reproduction order information corresponding to the number of the plurality of signal sources, respectively, for the single recording assembly.

In addition, the method of reproducing a plurality of digital data streams according to the present invention comprises the steps of: reading reproduction order information requested for reproduction; Step 2 of starting to reproduce the recording aggregate referred to by the read reproduction sequence information; And selectively reproducing only the unit data corresponding to the identification information specified in the read reproduction order information among the data in the reproduction started recording collection.

In addition, the recording medium according to the present invention comprises: a rewritable recording medium comprising: a first area in which a plurality of data streams of different signal sources are recorded together with signal source identification information of each stream; And a second area in which position information of the plurality of recorded data streams and reproduction order information including corresponding identification information are recorded.

Hereinafter, a plurality of digital data stream recording and reproducing methods and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 3 schematically illustrates a plurality of digital data stream recording apparatuses according to an embodiment of the present invention, and receives and receives digital broadcasts such as terrestrial, satellite, or cable broadcasts, respectively. A tuning unit 11 for storing and selectively outputting only a broadcast program corresponding to a channel number selected by a user among stored digital broadcasts; The selective output broadcast program is encoded and data-processed and alternately recorded on a single recording medium 13 such as a digital video disc as a data packet in a unit of a packet or a pack so that a single recording set (SOB) A recording processing unit 12 for recording in Stream OBject); It controls the channel selection operation of the tuning unit 11 so that broadcast programs corresponding to a plurality of channel numbers selected by the user are alternately recorded on the one recording medium 13, and the data of the recording processing unit 12. And a control unit 14 for controlling processing and recording operations. The tuning unit 11 receives and stores terrestrial waves, satellites, and cable broadcasts, respectively, and then the user controls the control unit 14 by the user. A plurality of buffers and channel selection units 111, 112, and 113 for selectively outputting only selected specific broadcast programs are included.

In addition, when an analog broadcast signal is received, as illustrated in FIG. 3, the digital conversion and encoding processor 21 converts the analog broadcast signal into a digital signal, encodes the converted digital signal, and converts the converted digital signal into digital data. ; And a buffer 20 for receiving and storing the converted and encoded digital data, and outputting the stored digital data to the recording processor 12 by a control operation of the controller 14.

In the plurality of digital data stream recording apparatus and method according to the present invention configured as described above, first, a plurality of broadcast programs are multiplexed, and digital broadcast data transmitted in the form of a transport stream includes a tuner unit through a digital broadcast reception antenna (ANT). When received (not shown), the received digital broadcast data is input to the buffer and channel selectors 111, 112, and 113, respectively, and temporarily stored therein. Then, as described with reference to FIG. 2, the controller 14 using PSI information. Only the data of the broadcast program corresponding to the channel number selected and input by the user is selectively outputted to the recording processor 12 according to the control operation of the " That is, the buffer and channel selectors 111, 112, and 113, according to the channel selection control of the controller 14, transmit only the specific broadcast program selected by the user from the plurality of temporarily stored broadcast programs to the recording processor 12. Will print each.

As described above, a plurality of broadcast programs output from the buffer and channel selectors 111, 112, and 113, respectively, are input to the recording processor 12, are encoded and processed, and then are recorded in a transport packet or pack data stream. Transmission packets or pack units corresponding to the plurality of broadcast programs are stored in a single recording set SOB, that is, a recording set SOB that is a recording unit of a continuously recorded data stream. Data streams are alternately recorded.

For reference, the plurality of alternately recorded broadcast programs may be a plurality of broadcast programs output from the same buffer and channel selector.

For example, when the user selects a plurality of broadcast programs within a plurality of broadcast programs multiplexed and transmitted to digital satellite broadcasts received and stored in the buffer and channel selector 111, the buffer and channel selector 111 A plurality of broadcast programs output from the plurality of broadcast programs are input to the recording processing unit 12, are encoded and data processed, and are alternately recorded on the recording medium 13 as a transmission packet or data stream in a pack unit.

On the other hand, the received analog broadcast signal is converted into digital data by the digital conversion and encoding processing unit 21, and temporarily stored in the buffer 20, and then read by the read control operation of the control unit 14 and the The digital data output to the recording processing unit 12 is encoded by the recording processing unit 12, such as the digital broadcast program output from the buffer and channel selecting units 111, 112, and 113. After the data is processed, it is alternately recorded on the recording medium 13 as a transmission packet or a data stream in a pack unit.

In this way, a plurality of data streams recorded by the recording processing unit 12, and identification information and management information for identifying and managing the data streams, in particular, reproduction order information Cell, will now be described with reference to the accompanying drawings. It will be described in detail.

First, FIG. 4 illustrates a plurality of data streams that are alternately recorded according to the present invention. In particular, a plurality of broadcast programs selected by a user are alternately recorded by the recording processing unit 12 in units of transmission packets. FIG. 11 illustrates an embodiment in which identification information for identifying the plurality of broadcast programs, that is, packet IDs, is additionally recorded in units of the transmission packets.

First, the letters and numbers displayed on the transmission packet indicate the signal source and channel number of each digital broadcast, and the recording order, respectively. For example, (S, 1, 1) shown in FIG. The broadcast (S), channel number (1) and recording order (1) are shown, and (T, 1, 1) shows terrestrial broadcast (T), channel number (1) and recording order (1).

Hereinafter, as illustrated in FIG. 4, a plurality of broadcast programs and packet identifiers alternately recorded in transmission packet units will be described. First, the digital broadcast programs selectively output by the buffer and channel selection units 111, 112, and 113 are respectively satellites. When broadcast channel 1, terrestrial broadcast channel 1, and cable broadcast channel 2, and the broadcast program selected by the user to be the digital satellite broadcast channel 1 and the cable broadcast channel 2, the controller 14 controls the record select control signal. The satellite broadcasting channel 1 selected by the user from among the broadcast programs output from the buffer and channel selectors 111, 112, and 113, that is, the satellite broadcasting channel 1, the terrestrial broadcasting channel 1, and the cable broadcasting channel 2, is outputted to the recording processor 12. And only a broadcast program corresponding to cable broadcast channel 2 is encoded and data processed by the recording processor 12. Controlled so as to be alternately recorded on the recording medium 13 to the transmission unit of packet, and writes the generated packet identifier (Packet ID) that identifies the broadcast program for each transport packet in which the alternate recording.

For example, a packet identifier is generated and recorded in a transport packet corresponding to satellite broadcast channel 1 as a 0, and a packet identifier is generated and recorded in a transport packet corresponding to cable broadcast channel 2.

That is, while sequentially recording the broadcast programs corresponding to each channel number selected by the user in units of a transmission packet, the packet identifiers for identifying the broadcast programs corresponding to the recorded transmission packets are generated and recorded differently, thereby reproducing the packet when the reproduction request is made. By the identifier, only the data stream of the transmission packet unit corresponding to the specific broadcast program requested by the user can be selectively reproduced and output.

Meanwhile, FIG. 5 illustrates a plurality of data streams that are alternately recorded according to another embodiment of the present invention. In particular, a plurality of broadcast programs selected by a user are packed in units of packs by the recording processor 12. FIG. Another embodiment of additionally recording identification information for identifying the plurality of broadcast programs, that is, pack identifiers (Pack IDs) in units of packs, is recorded alternately by grouping.

Referring to FIG. 5, a plurality of broadcast programs and pack identifiers, which are grouped in pack units and alternately recorded, will be described. As described above with reference to FIG. 4, the buffer and channel selection units 111, 112, and 113 select and output the pack identifiers. If the digital broadcasting programs are satellite broadcasting channel 1, terrestrial broadcasting channel 1, and cable broadcasting channel 2, respectively, and the broadcasting program selected by the user is the digital satellite broadcasting channel 1 and the cable broadcasting channel 2, the controller 14 records. A user selects one of satellite broadcasting channel 1, terrestrial broadcasting channel 1, and cable broadcasting channel 2, which are broadcast programs output from the buffer and channel selecting units 111, 112, and 113 by outputting a record select control signal to the recording processor 12. Only broadcast programs corresponding to the selected satellite broadcast channel 1 and cable broadcast channel 2 are encoded by the recording processor 12. And controlling data streams processed and grouped in pack units to be alternately recorded on the recording medium 13, and generating and recording a pack identifier (Pack ID) for identifying a corresponding broadcast program for each pack unit to be alternately recorded. .

For example, a pack identifier is generated and recorded in a pack unit data stream corresponding to satellite broadcasting channel 1 as '0', and a pack identifier is set as '1' in the pack unit data stream corresponding to cable broadcasting channel 2. Record as generated.

That is, the playback request is generated by differently generating and recording a pack identifier for identifying a broadcast program corresponding to a data stream of a pack unit to be recorded while alternately recording the broadcast programs corresponding to each channel number selected by the user in pack units. In this case, only the pack data stream corresponding to the specific broadcast program requested by the user is selectively reproduced and output by the pack identifier.

On the other hand, management information for reproducing and managing a plurality of data streams alternately recorded in units of transmission packets or packs on one recording medium 13 as described above, in particular, reproduction order (Cell) information is shown in FIGS. 4 and 5. As described above, the plurality of data streams are divided and recorded so that the data streams corresponding to the broadcast program requested by the user can be sequentially reproduced when the reproduction request is made. See FIG. 6 attached below for the reproduction order information. This will be described in detail.

First, FIG. 6 illustrates that management information for managing a plurality of data streams that are alternately recorded according to the present invention, in particular, reproduction order information (Cell) for managing the reproduction order is divided and recorded. The application management shown in FIG. The information file (Application.IFO) includes TOC information (Table of Content) in which entry points, which are information that can be randomly accessed with respect to the recorded broadcast program, are recorded, and service information (in which information about the recorded broadcast program is recorded) The SI (Service Information) table is managed, and the common management information file (Common.IFO) includes an original playlist which is automatically generated as the broadcast program is recorded, and a reproduction order information layer for the recorded broadcast program. And a user-defined playlist created as the user edits the playback order for the recorded broadcast program.

In addition, the streamer management information file (Streamer.IFO) manages a mapping list, which is an address for a recording unit (SOBU: SOB), which is a recording unit of a data stream recorded on a recording medium. The reproduction order information Cell managed by the common management information file Common.IFO includes a start time (C_S_PTM: Cell Start Presentation) in which the plurality of broadcast programs are recorded, as shown in FIG. End time (C_E_PTM: Cell Start Presentation) and identification information for identifying a broadcast program (PID: Packet ID or Pack ID) are managed.

For example, as shown in FIG. 4, when a plurality of broadcast programs are alternately recorded in units of a transport packet, Cell 1, which is reproduction order information for a broadcast program corresponding to satellite broadcast channel number 1, is recorded by the broadcast program. The start time (C1_S_PTM) and the end time (C1_E_PTM) and identification information for identifying a broadcast program, that is, a packet identifier (PID: Packet ID = '0'), and manage a broadcast program corresponding to terrestrial broadcast channel number 1. Cell 2, which is information on the playback order, manages a start time (C2_S_PTM) and an end time (C2_E_PTM) at which the broadcast program is recorded, and a packet identifier (PID: Packet ID = '1') identifying a broadcast program. As shown in FIG. 5, when a plurality of broadcast programs are grouped into data streams in pack units and alternately recorded, Cell 1, which is reproduction order information for a broadcast program corresponding to satellite broadcast channel number 1, is described above. It manages the start time (C1_S_PTM) and end time (C1_E_PTM) at which the broadcast program is recorded, and the pack identifier (PID: Pack ID = '0') for identifying the broadcast program, and manages the broadcast program corresponding to the terrestrial broadcast channel number 1. Cell 2, which is the reproduction order information, manages a start time (C2_S_PTM) and an end time (C2_E_PTM) at which the broadcast program is recorded, and a pack identifier (PID: Pack ID = '1') identifying a broadcast program.

For reference, a plurality of digital data stream recording methods according to the present invention. In addition to the plurality of broadcast programs, a plurality of data streams received from different input sources may be alternately recorded on one recording medium through the recording method.

On the other hand, in order to selectively reproduce only the data stream corresponding to a specific broadcast program requested by the user from a recording medium in which data streams corresponding to a plurality of broadcast programs are alternately recorded in a single recording assembly (SOB) as described above. First, the reproduction order information (Cell) is read from the common management information file (Common.IFO) described above with reference to FIG. 6, and the reference information recorded in the read reproduction order information, that is, the reproduction order start time (C_S_PTM) ), The playback sequence end time (C_E_PTM), and the identification information (C_PID) for identifying the data stream in the recording assembly (SOB) corresponding to the reproduction order information, and read out the recording assembly (SOB) corresponding to the reproduction order information. A transmission packet having the same identification information (PID) as the identification information (C_PID) among a plurality of data streams in the recording assembly (SOB) which has been started playing; It reproduces only the selected data stream of the unit.

That is, a plurality of transmission packets or pack units of data are alternately recorded in the recording assembly SOB by searching for and reproducing the recording assembly SOB corresponding to the broadcast program requested by the user by using the reproduction order information Cell. By selectively selecting and transmitting only a transmission packet or a data stream in a unit of a pack having an identification information (PID) that matches the identification information (C_PID) recorded in the reproduction order information (Cell) of the stream, only a specific broadcast program desired by a user can be selectively selected. You can play it.

A plurality of digital data stream recording and reproducing methods according to the present invention, and the recording medium according to the present invention, the plurality of broadcast programs selected by the user or a plurality of data streams input from another input source such as a digital video disc Generates and records identification information identifying each of a plurality of recorded data streams while alternately recording data in a transport packet unit or a pack unit on one recording medium, and manages information, in particular, playback order. By dividing and recording the reproduction order information for managing the data, a plurality of data streams simultaneously input to one recording medium can be alternately selected and recorded, and when a reproduction request is made, a user can use the identification information and the reproduction order information. Very useful invention to selectively play only the requested data stream Will.

Claims (7)

Simultaneously receiving signals provided from a plurality of different signal sources respectively received through different broadcasting schemes; Dividing the plurality of signals simultaneously received based on each corresponding signal source, alternately recording the data in a packet unit or a pack unit, and then dividing the plurality of signals into a single recording set; And A plurality of reproduction order information corresponding to the number of the plurality of signal sources is generated and recorded for the single recording aggregate, and reference information corresponding to the identification information of the corresponding signal source is respectively recorded in the plurality of reproduction order information. And a third step of additionally recording the plurality of digital data streams. The method of claim 1, In the second step, when the plurality of signals are alternately recorded in packet units, a plurality of unique packet IDs, which are identification information of the corresponding signal source, are recorded together with the packets. Digital data stream recording method. The method of claim 1, In the second step, when a plurality of signals are grouped in pack units and recorded alternately, a unique pack ID, which is identification information of a corresponding signal source, is recorded together with the pack. A plurality of digital data stream recording methods. delete delete A plurality of signals provided from a plurality of different signal sources respectively received through different broadcasting schemes are divided together with identification information of each corresponding signal source, alternately recorded in packet units or pack units, and divided into a single recording set. A first region; And And a plurality of reproduction order information corresponding to the number of the plurality of signal sources, for the single recording aggregate, each including a second area in which the reference information corresponding to the identification information of the corresponding signal source is recorded. Record medium, characterized in that. The method of claim 1, The reproduction order information is a plurality of cell information corresponding to the single recording aggregate, respectively, and the reference information is a unique cell packet ID or a cell pack ID additionally recorded in the cell information. And (Cell Pack ID).

Images