KR20030078587A - Optical disk and recording method thereof - Google Patents

Abstract

PURPOSE: An optical disk and a recording method of an optical disk are provided to unify write and read of the optical disk by processing a defective area for the compatibility of a disk drive in the case that the defective area is generated. CONSTITUTION: When data is recorded at an area including a defective ECC(Error Checking and Correction) block(26), recording is terminated at an ECC block before the defective ECC block. The recording is started at the final 8 channel bit of an ECC block next to the ECC block.

Description

Optical disc and recording method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc and a recording method of an optical disc, and more particularly, to a method of recording in a region in which a defective block is included in a DVD + RW disc, and an optical disc recorded by the method.

In general, an optical disc is widely used as an information carrier of an optical pickup device for recording / reproducing information in a non-contact manner, and is classified into a compact disc (CD) and a digital versatile disc (DVD) according to the information recording capacity. Can be. In addition, optical discs capable of recording, erasing, and reproducing data include CD-Rs, CD-RWs, DVD-RWs, DVD-RAMs, and DVD + RWs.

Here, in the case of a DVD + RW that can be repeatedly recorded, a basic recording unit capable of recording a certain capacity is called an ECC block, and a case of recording on several ECC blocks is shown in FIG. 1A. In general, when data is continuously recorded, the last 8 channel bits 100-a of the ECC block in front of the Nth block 102 at which recording is started are used for linking. In addition, since the linking position cannot be precisely set due to an error in the number of revolutions of the disc during recording, recording is started in this area with an area corresponding to ± 5T as a spare area. That is, by setting a marginal area between the ideal recording start point and the actual recording start point by ± 5T, recording is normally performed when recording starts within this range.

In order to apply the same linking scheme, the last eight channel bits 104-a of the ECC block 104 at the end of the recording are left unrecorded for the purpose of linking for the next recording.

The case of continuous recording by this linking scheme is shown in FIG. 1B. Up to the (N-1) th block 100 is written, and the last eight channel bits 100-a of the (N-1) th block 100 remain unrecorded. When writing to the M ECC blocks from the next N-th block 102 after the (N-1) -th block 100, the last 8 channel bits of the (N-1) -th block 100 ( Linking occurs in 100-a). Then, the last eight channel bits 104-a of the (N + M-1) th block 104 at which writing ends are left unrecorded.

FIG. 1C illustrates a case where data is to be recorded in a blank area in which data is not recorded. If the (N-2) block 110 immediately before the (N-1) ECC block 112 to start recording is an unrecorded blank, the (N-1) th block 112 at which recording of the user data starts ), Dummy data is recorded, and user data is recorded from the next Nth block 114. At this time, the dummy data is recorded from the last eight channel bits 110-a of the (N-2) th block 110. Then, the last eight channel bits 116-a of the (N + M−1) th block 116 at which writing ends are left unrecorded.

As described above, it is generally specified how linking occurs when continuous recording is performed on DVD + RW, but it is specified how linking is applied when a defective block occurs between ECC blocks on which continuous recording is performed. Not. In addition, there are provisions for the case of continuous recording and the case of recording in the blank state, but there is no provision for the case where overwriting is again performed on a disc which has already been recorded. Therefore, it is necessary to define in detail how linking is applied when a defective block is generated and a case in which overwriting is performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a recording method when overwriting is performed on a DVD + RW and a method for processing and recording a defective area when recording is performed in a predetermined area including a defective area. And an optical disc recorded by this method.

1A is a diagram for explaining a general recording method of a conventional DVD + RW.

FIG. 1B is a view showing that linking occurs during continuous recording in a conventional DVD + RW.

FIG. 1C is a view showing that linking occurs when recording on a blank portion in a conventional DVD + RW.

2 is a diagram showing an overwriting method by the optical disc recording method according to the first embodiment of the present invention.

3A and 3B show an optical disc recording method according to a second embodiment of the present invention.

4A and 4B show an optical disc recording method according to a third embodiment of the present invention.

5A and 5B show an example of an optical disc recording method according to a fourth embodiment of the present invention.

6A and 6B show another example of the optical disc recording method according to the fourth embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

20,22,24,28,30,32 ... ECC block 26 ... Defect ECC block

20-a, 24-a, 28-a, 32-a ... 8 channel bits

In order to achieve the above object, an optical disc recording method according to the present invention is a part of the end of the ECC block in front of the ECC block in which the overwriting starts when the overwriting is performed on the optical disc capable of recording / playback. And performing linking by overlapping and recording data in the area.

In order to achieve the above object, an optical disc recording method according to the present invention is a recording method of an optical disc capable of recording / reproducing, wherein data is recorded in an area including a defective ECC block. Ending recording in the preceding ECC block; characterized in that it comprises a.

Here, it is preferable to start recording on the last 8 channel bits of the ECC block following the defective ECC block.

It is also desirable to start recording in the ECC block immediately following the defective ECC block.

In order to achieve the above object, an optical disc recording method according to the present invention is a recording method of an optical disc capable of recording / reproducing, in which data is recorded in front of the defective ECC block when data is recorded in an area including a defective ECC block. Terminating the recording before the last 8 channel bits of the ECC block.

In order to achieve the above object, an optical disc according to the present invention is an optical disc capable of recording / reproducing, and when an overwriting is performed on a part of a disc where recording has already been performed, an ECC immediately before the ECC block in which the overwriting starts. It is characterized in that the linking is performed by overlapping and recording data in a partial region at the end of the block.

In order to achieve the above object, in the optical disc according to the present invention, when data is recorded in an area including a defective ECC block, recording is terminated at the ECC block in front of the defective ECC block, and the defective The recording is started at the last 8 channel bits of the ECC block after the ECC block.

In order to achieve the above object, an optical disc according to the present invention is an optical disc capable of recording / reproducing, when recording data in an area including a defective ECC block, recording in an ECC block in front of the defective ECC block. Is ended, and recording is started in the ECC block immediately following the defective ECC block.

Hereinafter, an optical disc and a recording method of an optical disc according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the optical disk and the optical disk recording method according to the first embodiment of the present invention, referring to Fig. 2, in front of the N-th ECC block 12 to start recording when overwriting is performed in a region where recording has already been performed. The recording starts from a part of the area at the end of the (N-1) th ECC block 10. This area is the part where data has already been recorded before, and the linking occurs as the data is overwritten. Preferably, recording starts from the last eight channel bits 10-a of the block in front of the ECC block where recording starts. In other words, if there is already recorded on the disc and you want to overwrite some areas, for example, the Nth block 12 to the M blocks, the N in front of the Nth block 12 (N Linking is performed on the last eight channel bits 10-a of the -1) th block 10.

The last eight channel bits 14-a of the (N + M-1) th block 14 at which recording is completed remain overwritten without being overwritten.

Next, in the optical disc and the optical disc recording method according to the second embodiment of the present invention, when the recording is performed in the area including the defective ECC block 26 as shown in FIG. 3A, the defective ECC block 26 is performed. The recording ends before the last eight channel bits 24-a of the ECC block 24 immediately before. That is, when a defect is generated in the N-th block 26 when writing to the (M + 2) blocks from the (N-2) -th block 22, the (N-2) -th beginning of the recording Linking occurs in the last eight channel bits 20-a of the (N-3) th block 20 in front of the block 22.

Subsequently, writing ends in front of the last eight channel bits 24-a of the (N-1) th block 24 in front of the Nth block 26 where the defect has occurred, and after the defect block 26 ( Recording starts from the last eight channel bits 28-a of the N + 1) th block 28.

In the above example, the example where the recording starts from the last eight channel bits 28-a of the (N + 1) th block 28 after the defect block 26 has been described, but as shown in FIG. 3B (26) Recording may be started from the beginning of the (N + 1) th block 28 that follows. By doing this, there is an advantage that more data area corresponding to 32 KB can be secured.

The optical disc and the optical disc recording method according to the third embodiment of the present invention, when the recording is to be performed on the (N-2) -th block 22 to (M + 2) blocks, as shown in Figure 4a, For example, if a defect occurs in the Nth block 26, the last eight channel bits 20-a of the (N-3) th block 20 in front of the (N-2) th block 22 at which recording is started. Start recording. Then, recording stops at the end of the (N-1) th block 24 immediately preceding the Nth block 26 where the defect occurred. This is because linking does not need to occur in front of the defective block, so that a free area for linking does not have to be provided.

Subsequently, the recording starts again from the last eight channel bits 28-a of the (N + 1) th block 28 following the defect block 26, and the (N + M−1) th block 32 where the recording ends. ) Is recorded. At this time, writing is not performed on the last eight channel bits 32-a of the (N + M-1) th block 32 at which recording is completed.

On the other hand, as shown in FIG. 4B, writing may be performed directly from the beginning of the (N + 1) th block 28 following the defect block 26. FIG. By doing this, there is an advantage that a data area corresponding to 32 KB can be more secured than the method illustrated in FIG. 4A. Subsequently, recording starts again from the (N + 1) th block 28 and the recording ends in the (N + M-1) th block 32. At this time, writing is not performed on the last eight channel bits 32-a of the (N + M-1) th block 32 at which recording is completed.

The second and third embodiments are particularly effective in the case where recording is performed in the blank area in the DVD + RW, when the recording is continuously performed immediately after the area where recording has already been performed, and in which part of the area has already been recorded. This can be applied to all cases of overwriting the area. Defects here include both cases that occurred before or during recording. Further, the optical disc and the optical disc recording method according to the present invention can be applied to a disc having a 4.7 GB capacity.

Next, the optical disc recording method and the optical disc according to the fourth embodiment of the present invention propose a linking scheme when a defect occurs in a block in front of an area to be recorded.

Fig. 5A shows a state before performing recording, and Fig. 5B shows a state in which recording has been performed according to the recording method of the present invention. Referring to FIG. 5A, some areas of the user area are already recorded in, for example, (N-2) blocks 36, (N-1) blocks 37, and N blocks 38, and (N-3). Linking is performed on the last eight channel bits 35-a of the block 35 as described above. Then, from the (N + 1) block 39 to the (N + M-1) block 42, the blank remains unrecorded. Here, for example, when recording is to be performed on (M-1) ECC blocks from (N + 1) block 39 to (N + M-1) block 42, recording is started (N When the defective area 38 is generated in the N block in front of the +1) th block 39, the last eight channel bits 38-a of the defective area 38 cannot be used. Therefore, a separate area for linking must be defined.

In such a case, an area for performing linking is illustrated in FIG. 5B. User data cannot be recorded in the (N + 1) block 39 next to the defective area 38, but data for linking is recorded. For example, data for linking is recorded in the last eight channel bits 39-a of the (N + 1) block 39. On the other hand, in the case where the (N + 1) block 39 immediately before the (N + 2) block 40 which starts recording is a blank which is not recorded, the (N + 2) block 40 follows the above-described standard. Dummy data is recorded, and user data is recorded from the next (N + 3) block 41. Also, the last eight channel bits 42-a of the (N + M-1) block 42 at which writing ends are not written for the next linking.

5A shows a case where the area to be recorded is a blank in an unrecorded state, and FIG. 6A shows a case where the area to be recorded is an already recorded area. 6A shows a state before recording, and FIG. 6B shows a state recorded according to the recording method of the present invention.

For example, the last eight channel bits of the (N-2) block 46, the (N-1) block 47, and the N block 48 are already written, and the (N-3) block 45 is written. Linking is performed at 45-a as described above. Here, when the overwriting is to be performed from the (N + 1) block 49 which has already been recorded to the (N + M-1) block 51, the (N + 1) block 49 at which recording is started is performed. If a defective area 48 is generated in the N block in front of), the last eight channel bits 48-a of this defective area 48 cannot be used for linking due to the defect.

Therefore, the linking data is recorded in the (N + 1) block 49 following the defective area 48, and more preferably the linking data is recorded in the last 8 channel bits 49-a. . Accordingly, as shown in FIG. 6B, recording starts from the last eight channel bits 49-a of the (N + 1) block, and the last eight channels of the (N + M-1) block 51 where the recording ends. Bit 51-a is not written for the next linking.

As described above, the optical disc recording method and the optical disc according to the fourth embodiment cause linking to occur when a defective area is generated in front of the area to be recorded. Here, the same may be applied when the area to be recorded is the blank area where recording is not performed or the area where recording has already been performed.

As described above, the optical disc and the optical disc recording method according to the present invention are to provide a method for processing a defective area in a DVD + RW disc when a defective area is generated for compatibility of the disk drive. That is, a new method for overwriting an optical disc is newly proposed, including an overwriting method that is not previously defined, a method of recording in a predetermined area including a defective area, and a method of performing linking when a defective area occurs in front of the area to be recorded. Unification in recording / playback can be achieved.

Claims (32)

When overwriting on an optical disc capable of recording / playback, performing linking by overlapping recording of data in a partial region at the end of the ECC block immediately before the ECC block at which the overwriting is started; An optical disc recording method. The optical disc recording method according to claim 1, wherein the area for performing linking is the last eight channel bits of an ECC block. An optical disc recording method capable of recording / reproducing, And when recording data in the area including the defective ECC block, ending the recording in the ECC block in front of the defective ECC block. The method of claim 3, Starting recording at the last 8 channel bits of the ECC block following the defective ECC block. The method of claim 3, And starting recording in the ECC block immediately following the defective ECC block. The method according to any one of claims 3 to 5, And performing overlinking by overwriting the data in a partial region at the end of the ECC block immediately before the overwrite ECC block when overwriting the optical disc. Recording method. 7. The optical disc recording method according to claim 6, wherein the area for performing linking is the last eight channel bits of an ECC block. An optical disc recording method capable of recording / reproducing, And recording the data in the area including the defective ECC block, ending the recording in front of the last 8 channel bits of the ECC block in front of the defective ECC block. The method of claim 8, Starting recording at the last 8 channel bits of the ECC block following the defective ECC block. The method of claim 8, And starting recording in the ECC block immediately following the defective ECC block. The method according to any one of claims 8 to 10, And performing overlinking by overwriting the data in a partial region at the end of the ECC block immediately before the overwrite ECC block when overwriting the optical disc. Recording method. 12. The optical disc recording method according to claim 11, wherein the area for performing linking is the last eight channel bits of an ECC block. An optical disc recording method capable of recording / playback, And recording data for linking in a partial region at the end of the ECC block after the defective region when a defective region occurs in front of the region to be recorded. 14. The optical disc recording method according to claim 13, wherein the data for linking is recorded in the last eight channel bits of an ECC block. The method according to claim 13 or 14, And the area to be recorded is an area that has already been recorded and overwritten thereon. The method according to claim 13 or 14, And the area to be recorded is an unrecorded blank area. The method of claim 16, And the dummy data is recorded in a block following the defective area. An optical disc capable of recording / playback, When overwriting a part of the disc where recording has already been performed, linking is performed by overwriting the data in the partial area at the end of the ECC block immediately before the ECC block where the overwriting starts. Optical disk. 19. The optical disc of claim 18, wherein the region for performing linking is the last eight channel bits of an ECC block. An optical disc capable of recording / playback, When data is recorded in the area containing the defective ECC block, recording ends at the ECC block in front of the defective ECC block and at the last 8 channel bits of the ECC block following the defective ECC block. An optical disc, wherein recording is started. An optical disc capable of recording / playback, When data is recorded in the area containing the defective ECC block, recording ends at the ECC block in front of the defective ECC block, and recording starts at the ECC block immediately following the defective ECC block. An optical disc, characterized in that. The method of claim 20 or 21, And when overwriting the optical disc, linking is performed by overlapping and recording data in a partial region at the end of the ECC block immediately before the ECC block at which the overwriting starts. 23. The optical disc of claim 22, wherein the region for performing linking is the last eight channel bits of an ECC block. An optical disc capable of recording / playback, When data is recorded in the area containing the defective ECC block, recording is terminated before the last 8 channel bits of the ECC block in front of the defective ECC block, and in the ECC block following the defective ECC block. An optical disc, wherein recording starts at the last eight channel bits. An optical disc capable of recording / playback, When data is recorded in the area containing the defective ECC block, recording is terminated before the last eight channel bits of the ECC block in front of the defective ECC block, and the ECC immediately following the defective ECC block. An optical disc, wherein recording is started in a block. The method of claim 24 or 25, And when overwriting the optical disc, linking is performed by overlapping and recording data in a partial region at the end of the ECC block immediately before the ECC block at which the overwriting starts. 27. The optical disc of claim 26, wherein the region for performing linking is the last eight channel bits of an ECC block. An optical disc capable of recording / playback, And a linking data is recorded in a partial region at the end of the ECC block after the defective region when a defective region occurs in front of the region to be recorded. 29. The optical disc of claim 28, wherein the region for performing linking is the last eight channel bits of an ECC block. The method of claim 28 or 29, And the area to be recorded is an area that has already been recorded and overwritten thereon. The method of claim 28 or 29, And the area to be recorded is an unrecorded blank area. The method of claim 31, wherein And the dummy data is recorded in a block following the defective area.