KR100728046B1 - A method of reproducing information from optical information storage medium - Google Patents

Abstract

Disclosed is a method of reproducing an optical information storage medium for reproduction only.

The disclosed optical information storage medium reproducing method has a plurality of areas including a BCA, a lead-in area, a user data area, and a lead-out area, and a method for reproducing a dedicated optical information storage medium having a plurality of areas all formed of pits. The data recorded in the first pit pattern is read in the BCA among the plurality of areas, and the data recorded in the second pit pattern different from the first pit pattern is read in the lead-in area and / or the user data area.

In this way, the pit pattern or the recording modulation method is defined in the BCA area instead of the data area to ensure compatibility of the storage medium drive, thereby improving data reproduction performance.

Description

A method of reproducing information from optical information storage medium}

1 shows the overall structure of a reproducing optical information storage medium.

2A is a diagram schematically showing the physical structure of a recordable optical information storage medium.

2B shows the overall structure of a recordable optical information storage medium.

3A shows a straight single pattern of pits.

3B shows a wobbling single pattern of pits.

3C shows a straight specific pattern of pits.

3D shows the wobbling specific pattern of the pit.

3E shows a straight random pattern of pits.

3F shows the wobbling random pattern of the pits.

 4A to 4D, 5A, and 5B show pit patterns for respective regions of the optical information storage medium according to the first embodiment of the present invention.

6A and 6B are diagrams for describing a bi-face modulation scheme.

7 shows the overall structure of an optical information storage medium according to a second embodiment of the present invention.

8A, 8B, 9A, and 9B show a pit pattern for each region of the optical information storage medium according to the second embodiment of the present invention.

FIG. 10 shows an example of a recording pattern of a basic recording unit, run in and run out in the optical information storage medium according to the second embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

10 ... BCA, 20 ... lead-in area

30 ... User data area, 31 ... Run-in

33 ... default recording unit, 35 ... runout

40 ... Leadout area

The present invention relates to a method of reproducing a dedicated optical information storage medium. More particularly, the present invention relates to a method of reproducing an optical information storage medium. More specifically, the optical information includes a plurality of areas, in which data is recorded in different modulation schemes or in different pit patterns. A method for reproducing a storage medium.

Optical information storage medium For example, an optical disk is widely used as an information storage medium of an optical pickup apparatus for recording / reproducing information in a non-contact manner, and includes a compact disk (CD) and a digital multifunction disk (DVD) according to the information recording capacity. digital versatile disk). In addition, optical discs capable of recording, erasing and reproducing include 650MB CD-R, CD-RW, 4.7GB DVD + RW, and the like. Furthermore, HD-DVD with a recording capacity of 23GB is also being developed.

By the way, the various types of optical information storage media as described above have standardized specifications for each type of storage media in consideration of economic convenience or economic convenience of users, and standardize the storage media that are not yet defined. Efforts are underway. Therefore, for the standardization, development of the format is required in order to ensure compatibility or consistency with existing storage media.

The conventional read-only optical disc includes a burst cutting area (BCA) 10, a lead-in area 20, a user data area 30, and a lead-out area 40 as shown in FIG. The BCA 10 records information on the serial number of the optical disc, and the disc related information is recorded in the lead-in area 20. By the way, the serial number of the optical disc is recorded in the BCA 10 as a barcode.

On the other hand, the physical structure of the recordable high density optical information storage medium as the related art of the present invention is shown in Fig. 2A. A related invention is disclosed in patent 2001-023747 filed by the applicant. The recordable optical information storage medium includes a lead-in area 110, a user data area 120, and a lead-out area 130, and constitutes an entire storage medium area with grooves 123 and lands 125. . In this case, the user data may be recorded only in the groove 123 or may be recorded in both the groove 123 and the land 125.

When recording read-only data in the lead-in area 110, wave-shaped wobble signals 105 and 106 that are signals of a specific frequency on the sidewalls of the grooves 123 and / or the land 125 tracks instead of pits. Record consecutively. Here, the beam L records or reproduces data along the groove 123 and / or the land 125 track. In particular, the lead-in area 110 and the lead-out area 130 are provided with a read only area and a recordable area where disc related information or information for copy protection is recorded. The disc-related information is recorded in the high frequency wobble 105, and the recordable area and the user data area 120 of the lead-in area 110 and the lead-out area 130 are relative to the high frequency wobble 105. It consists of a low frequency wobble (106). Reference numeral 127 denotes a recording mark formed in the user data area 120.

2B, the recordable optical information storage medium includes a lead-in area 145, a user data area 150, and a lead-out area 155, and the BCA 140 disposed at the innermost side of the storage medium. It may further include. The optical information storage medium shown in FIG. 2B is formed with grooves from the BCA 145 to the lead-out 155. The optical information storage medium that can be recorded is formed with grooves including the BCA, whereas conventional optical information storage media for reproduction only have a consistency with other types of storage media because barcodes are formed on the BCA. ) Falls. Therefore, the conventional read-only optical information storage medium is disadvantageous in terms of compatibility or consistency between the different types of storage media described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a method of reproducing an optical information storage medium that maintains consistency with other types of optical information storage media and improves drive compatibility by defining a recording pattern or a recording modulation scheme. The purpose is to provide.

In order to achieve the above object, a method of reproducing an optical information storage medium according to the present invention has a plurality of areas including a BCA, a lead-in area, a user data area, and a lead-out area, and the entirety of the plurality of areas is fit. A method of reproducing a read-only optical information storage medium, comprising: reading data recorded in a first pit pattern in the BCA of the plurality of areas and reading the first pit pattern in the lead-in area and / or the user data area. And read the data recorded in the second pit pattern different from the second pit pattern.

The pit of the BCA is formed of a first straight pattern or a first wobbling pattern, and the lead-in area and / or the user data area are different from the second straight pattern or the first wobbling pattern different from the first straight pattern. It is formed of a second wobbling pattern.

In addition, it is preferable that at least one of the BCA, the lead-in area, the user data area, and the lead-out area is divided into a plurality of small areas, and the pits of the small areas are formed in different patterns.

The lead-in area includes a first area and a second area, the pit of the first area is formed of a third straight pattern or a third wobbling pattern, and the pit of the second area is a pit of the first area. And a fourth straight pattern or a fourth wobbling pattern different from the pattern.

Here, the straight pattern is a straight single pattern, a straight specific pattern or a straight random pattern, and the wobbling pattern is a wobbling single pattern, a wobbling specific pattern or a wobbling random pattern.

In order to achieve the above object, a method of reproducing an optical information storage medium according to the present invention includes a plurality of areas having a BCA, a lead-in area, a user data area, and a lead-out area, wherein the entire area is formed of pits. A reproduction-only optical information storage medium different from the recording modulation method of the BCA and the lead-in area and / or the user data area, wherein the BCA is the first modulation method in the plurality of areas. Read the recorded data, and in the lead-in area and / or the user data area reads the data recorded in a second modulation method different from the first modulation method.

The write modulation scheme is an RLL (d, k) or bi-face scheme.

At least one of the BCA, the lead-in area, the user data area, and the lead-out area is divided into a plurality of small areas, and the small areas use different recording modulation schemes.

Hereinafter, a method of reproducing an optical information storage medium according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The optical information storage medium to be reproduced according to the present invention is used only for reproduction, and is classified into a plurality of areas according to a function or purpose, and a recording modulation method or a recording pattern in some areas of the plurality of areas is the other area. The recording modulation scheme or the recording pattern in e.g. are configured differently.

The optical information storage medium may be classified into a plurality of areas according to a function or purpose. For example, as shown in FIG. 1, the BCA 10, the lead-in area 20, the user data area 30, and the lead-out are shown. Region 40 is included. The entire area of the optical information storage medium is formed of pits. In other words, the BCA 10, the lead-in area 20, the user data area 30, and the lead-out area 40 are all formed of pits. This maintains consistency in that the recordable optical information storage medium is formed with grooves throughout.

The BCA 10 records information on the serial number of the storage medium or the BCA area by the pit. Disc-related information, copy protection information, and the like are recorded in the lead-in area 20. Disc-related information includes, for example, information on types of storage media such as recordable discs, write once discs, and playback-only discs, information on the number of recording layers, recording speed information, and disc size information. have.

In the optical information storage medium according to the first embodiment of the present invention, the pit patterns formed in the BCA 10, the lead-in area 20, the user data area 30, or the lead-out area 40 are different from each other. Alternatively, the recording modulation schemes of the respective areas are configured differently.

First, the case where the pit patterns of the respective regions are configured differently will be described. For example, the pit pattern of the BCA 10 may be different from the pit patterns of the lead-in area 20, the user data area 30, and the lead-out area 40. Here, the pit in the BCA 10 may be formed in a straight pattern or a wobbling pattern. The straight pit represents a case where the pits are arranged in a red line, and the wobbling pit represents a case where the pits are arranged in a wave form.

 The straight pit and the wobbling pit may be arranged in a single pattern, a specific pattern, or a random pattern. A single pattern means a pattern in which pits having the same length of nT are arranged at regular intervals. Where n is a natural number and T is the minimum length of the pit. For example, the straight single pattern shows a case where the single patterns are arranged in a straight line as shown in FIG. 3A, and the wobbling single pattern shows a case where the single patterns are arranged in a wave form as shown in FIG. 3B.

A particular pattern refers to a pattern in which an array of pits of different lengths appear repeatedly. For example, the pit patterns by the combination of 3T and 6T can be repeatedly arranged. At this time, the sync pattern may be composed of 9T pits. Here, the straight specific pattern represents a case where the specific pattern is arranged in a straight line as shown in FIG. 3C, and the wobbling specific pattern represents a case where the specific pattern is arranged in a wave form as shown in FIG. 3D.

The pit of the random pattern means a pattern in which an arrangement of pit having different lengths is irregular. For example, the straight random pattern shows a case where the random patterns are arranged in a straight line as shown in FIG. 3E, and the wobbling random pattern shows a case where the random patterns are arranged in a wave form as shown in FIG. 3F.

The pit of the BCA 10 is formed of any one of a straight single pattern, a straight specific pattern, a straight random pattern, a wobbling single pattern, a wobbling specific pattern, and a wobbling random pattern, and the lead-in area 20 And the pit of the user data area 30 are formed in a pattern different from the pit pattern of the BCA 10.

Specifically, as shown in FIG. 4A, the pits of the BCA 10 are formed in a straight single pattern, and the pits of the lead-in area 20 and the user data area 30 are formed in a straight random pattern. Can be. In addition, as illustrated in FIG. 4B, the BCA 10 may be formed in a straight specific pattern, and the pits of the lead-in area 20 and the user data area 30 may be formed in a straight random pattern. As another example, as shown in FIG. 4C, the pits of the BCA 10 are formed in a straight single pattern, and the pits of the lead-in area 20 and the user data area 30 are formed in a wobbling random pattern. Can be. In particular, in the case of a wobbling random pattern, the amplitude of the wobble may be progressively reduced or increased. 4D illustrates a case where the amplitude of the wobble gradually decreases in the wobble random pattern.

Here, the tracking servo is generally implemented by the differential push-pull detection (DPD) method for data dedicated to reproduction. The differential push-pull detection scheme is already well known, and thus a detailed description thereof will be omitted. By the way, in the case where reproduction-only data is recorded in a single pattern of pit, since the DPD signal is not detected, the DPD method cannot be used. However, in the present invention, since only the focusing servo is implemented and reproduced when the BCA 10 is reproduced, even if the DPD method is adopted, the BCA 10 region is not affected. In other words, even if the pit of the BCA 10 is formed in a single pattern as shown in Figs. 4A, 4C, and 4D, the BCA 10 does not need to implement tracking servo. It's okay. Therefore, data other than the BCA 10, that is, the lead-in area 20, the user data area 30, and the lead-out area 40 can be reproduced using the DPD method.

As another example, the pits of the BCA 10 may be formed in a straight random pattern, and the pits of the lead-in area 20 and the user data area 30 may be formed in a straight random pattern or a wobbling random pattern. . Next, the pit of the BCA 10 may be formed in a straight random pattern, and the lead-in area 20 or the user data area 30 may be formed in a wobbling random pattern. As described above, when the pit of the BCA 10 is formed in a random pattern, the pit pattern of the BCA 10 may be, for example, a pattern indicating information of a 00h pattern or a BCA region.

In addition, the BCA 10, the lead-in area 20, and the user data area 30 may be formed in different pit patterns. For example, as shown in FIG. 5A, the BCA 10 is formed in a straight single pattern, the pit of the lead-in area 20 is formed in a straight random pattern, and the pit of the user data area 30 is formed. May be formed in a wobbling random pattern. 5B, the pit of the BCA 10 is formed in a straight specific pattern, the pit of the lead-in area 20 is formed in a wobbling random pattern, and the pit of the user data area 30 is formed. The pits may be formed in a straight random pattern.

Next, a case in which the recording modulation schemes of the BCA 10, the lead-in area 20, the user data area 30, and the lead-out area 40 are configured differently will be described.

The write modulation scheme of the BCA 10 is an RLL (d, k) modulation scheme or a bie-phase modulation scheme, and the lead-in area 20, the user data area 30, and the lead-out area 40 uses a modulation scheme different from that of the BCA 10.

Bi-phase modulation is a method of displaying data depending on whether or not there is a signal change within a certain period. For example, as shown in Fig. 6A, when the phase of the wobble does not change within a predetermined period P, 0 (or 1) bits are shown, and when the phase of the wobble changes, 1 (or 0) bits are shown. As described above, a method of recording data according to whether there is a predetermined signal change or a change of phase within a predetermined period is called a bi-face method. Although phase modulation of the wobble has been described here, various patterns of phase modulation are possible.

As shown in Fig. 6B, 0 (or 1) bits are shown when there is no change in pit within a predetermined period P, and 1 (or 0) bits when there is a change in pit. That is, 0 (or 1) bits are indicated when there is only a pit in one period P, and 1 (or 0) bits when there is an alternate pit and space within a period P.

On the other hand, the RLL modulation method indicates a modulation method according to how many 0 bits come between 1 bit and 1 bit, and the RLL (d, k) has a minimum number of 0 bits between 1 bit and 1 bit (d ) And up to (k). For example, RLL (1,7) represents a method in which there are at least one and a maximum of seven bits, one to seven, between 1 and 1 bit. According to this modulation method, when d = 1, the data of 1010101 is recorded and has a length of 2T between one bit and one bit. Further, when d = 7, data of (10000000100000001) is recorded and has a length of 8T between one bit and one bit. Here, T represents the minimum mark, that is, the minimum pit length. Thus, in the RLL (1,7) modulation scheme, data is recorded in pits and spaces having a length of (2T-8T).

In the above example, the case where the recording modulation method of the BCA 10 is different from the recording modulation method of the other areas is described. However, the recording modulation method of the lead-in area 20 may be different from the recording modulation method of the other areas. . For example, the write modulation method of the lead-in area 20 is an RLL (d, k) modulation method or a bi-face modulation method, and the BCA 10, the user data area 30, and the lead-out area are used. A modulation method of 40 may be used which is different from the modulation method of the lead-in area 20.

Meanwhile, the track pitch of the pit in the BCA 10 may be the same as or different from the track pitch of the pit in the lead-in area 20 and / or the user data area 30.

Next, the optical information storage medium according to the second embodiment of the present invention includes a plurality of areas according to a function or purpose, wherein at least one of the plurality of areas has a pit pattern or other recording different from the other areas. The modulation method is adopted.

For example, the lead-in area 20 may be divided into a plurality of small areas. For example, as shown in FIG. 7, when the lead-in area 20 is divided into the first area 20a and the second area 20b, the first area 20a and the second area 20b may be formed. Pits may be formed in different patterns or in different modulation schemes. The pit of the first region 20a is formed of a straight single pattern, a straight specific pattern, a straight random pattern, a wobbling single pattern, a wobbling specific pattern or a wobbling random pattern, and the pit of the second region 20b is It is formed in a pattern different from the pit pattern of the first region 20a.

For example, as illustrated in FIG. 8A, the pits of the first region 20a may be formed in a straight random pattern, and the pits of the second region 20b may be formed in a wobbling random pattern. In addition, as illustrated in FIG. 8B, the pits of the first region 20a may be formed in a straight specific pattern, and the pits of the second region 20b may be formed in a straight random pattern.

In addition, the pit pattern of the first area 20a or the pit pattern of the second area 20b may be configured differently from the pit patterns of the BCA 10 and the user data area 30. For example, as shown in FIG. 9A, the pit of the BCA 10 is formed in a straight single pattern, the pit of the first region 20a is formed in a straight specific pattern, and the second region 20b is formed. And the user data area 30 are formed in a straight random pattern. In addition, as illustrated in FIG. 9B, the pit of the BCA 10 is formed in a straight single pattern, the pit of the first region 20a is formed in a straight random pattern, and the pit of the second region 20b is formed. May be formed in a straight specific pattern, and the pits of the user data area 30 may be formed in a wobbling random pattern.

As another example, the user data area 30 is divided into two or more small areas, and the pits of the small areas are formed in different patterns, or the pit pattern of the small areas is the BCA 10 or the lead-in area. It may be different from the fit pattern of (10). In addition, the recording modulation schemes of the small regions may be different from each other, or the recording modulation schemes of the small regions and the BCA 10 or the lead-in region 10 may be different from each other.

On the other hand, when data is recorded in the user data area 30, data is recorded for each basic recording unit 33 as shown in FIG. The run-in 31 and the run-out 35 are provided before and after the basic recording unit 33. Here, the basic recording unit may be a physical cluster, a sector, an ECC block, a frame, or the like. The run-in 31 and the run-out 35 are for accurately recording data in the basic recording unit 33 when recording / reproducing data. In other words, when data is recorded slightly in the run-in 31 or the run-out 35, the data is smoothly recorded / reproduced by processing error correction.

Here, the pit of the run-in 31 and the run-out 35 may be formed in the same pit pattern as the user data area 30. For example, when the pits of the user data area 30 are formed in a straight random pattern or a wobbling random pattern, the pits of the run-in 31 and runout 35 are also formed in a straight random pattern or a wobbling random pattern. do. As an example of a random pattern, 00h may be recorded. As shown in FIG. 10, all of the pits of the run-in 31, the basic recording unit 33, and the run-out 35 may be recorded as 00h.

The pit of the run-in 31 and the run-out 35 may be formed in a pit pattern different from that of the user data area 30.

Next, at least one portion of the plurality of regions included in the optical information storage medium may record data using a recording modulation scheme different from the other regions.

For example, data may be recorded in the first region 20a by RLL (d, k) modulation and data may be recorded in the second region 20b by bi-face modulation. In addition, data is recorded in the first area 20a by a bi-face modulation method, and RLL (d, k) modulation is performed in the second area 20b, the BCA 10, and the user data area 30. The data may be recorded by the scheme, or conversely, the first region 20a may use the RLL (d, k) modulation scheme and the remaining region may use the bi-face scheme.

Meanwhile, the present invention can be applied to an optical information storage medium having two or more recording layers as well as a single optical information storage medium. That is, in the case of a multilayer optical information storage medium, the present invention described above can be equally applied to each recording layer.

As described above, the method of reproducing the optical information storage medium according to the present invention ensures compatibility of the storage medium drive by determining a pit pattern or a recording modulation method in the BCA area instead of the data area, thereby improving data reproduction performance. The user's convenience can be achieved. In addition, consistency with a format of a recordable optical information storage medium can be maintained.

Claims (17)

A method of reproducing a reproduction-only optical information storage medium having a plurality of areas including a BCA, a lead-in area, a user data area, and a lead-out area, wherein the plurality of areas are entirely formed of pits. The data recorded in the first pit pattern is read in the BCA of the plurality of areas, and the data recorded in the second pit pattern different from the first pit pattern is read in the lead-in area and / or the user data area. Optical information storage medium playback method. The method of claim 1, The pit of the BCA is formed of a first straight pattern or a first wobbling pattern, and the lead-in area and / or the user data area are different from the second straight pattern or the first wobbling pattern different from the first straight pattern. And reproducing the second wobbling pattern. The method of claim 2, And the first and second straight patterns are a straight single pattern, a straight specific pattern, or a straight random pattern. The method of claim 2, And the first and second wobbling patterns are a wobbling single pattern, a wobbling specific pattern, or a wobbling random pattern. The method according to any one of claims 1 to 4, And at least one of the BCA, the lead-in area, the user data area, and the lead-out area is divided into a plurality of small areas, and the small areas are data recorded in different pit patterns. The method of claim 5, The lead-in area is divided into a first area and a second area, the pit of the first area is formed of a third straight pattern or a third wobbling pattern, and the pit of the second area is a pit pattern of the first area. And a fourth straight pattern or a fourth wobbling pattern different from that of the optical information storage medium. The method of claim 6, And the third and fourth straight patterns are a straight single pattern, a straight specific pattern, or a straight random pattern. The method of claim 6, And the third and fourth wobbling patterns are a wobbling single pattern, a wobbling specific pattern, or a wobbling random pattern. The method according to any one of claims 1 to 4, wherein the user data area, And a plurality of basic recording units, and run-in and run-out arranged before and after each basic recording unit for each basic recording unit. The method of claim 9, And the basic recording unit is a physical cluster, a sector, an ECC block, or a frame. The method of claim 9, And the pit pattern of the basic recording unit and the pit pattern of the run-in and run-out are the same. The method of claim 9, And a pit pattern of the run-in and run-out is different from the pit pattern of the basic recording unit. And a plurality of areas having a BCA, a lead-in area, a user data area, and a lead-out area, the entirety of the plurality of areas being formed in pits, the recording modulation scheme of the BCA and the lead-in area and / or user data area. A method of reproducing an optical information storage medium for reproduction only different from a recording modulation scheme of Among the plurality of regions, the BCA reads data recorded by a first modulation scheme, and the lead-in and / or user data regions read data recorded by a second modulation scheme different from the first modulation scheme. Optical information storage medium playback method. The method of claim 13, And the recording modulation method is an RLL (d, k) or a bi-face method. The method of claim 13, And at least one of the BCA, the lead-in area, the user data area, and the lead-out area is divided into a plurality of small areas, and the small areas use different recording modulation schemes. The method of claim 15, The lead-in area includes a first area and a second area, the first area uses an RLL (d, k) modulation method or a bi-face method, and the second area is a write modulation method of the first area. And a modulation method different from that of the optical information storage medium. The method according to any one of claims 1 to 4 and 13 to 16, And the optical information storage medium comprises at least one recording layer.

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