KR20030090482A - 0ptical disk and method for recording the same - Google Patents

Abstract

PURPOSE: An optical disk and a recording method for an optical disk are provided to generate linking in front of an area where recording is started in overwriting or recording data on an area including a defect area, thereby stably recording and reproducing data. CONSTITUTION: A plurality of physical clusters are provided to continuously record data. Run-in area(13,13A) and run-out area(18',18A,18) are formed in front and rear of each physical cluster to accurately record data. An area A is an area where data is to be recorded. Linking is generated between the run-in area located in front of the area A and the run-out area preceding the run-in area in the case that data is recorded on a partial area of the run-out area or partial area of the run-in area(13A).

Description

Optical disk and method for recording the same

The present invention relates to an optical disc and a recording method of an optical disc, and more particularly, to an optical disc and an optical disc recording method which define a linking at a portion where recording starts when recording is performed on the optical disc.

In general, an optical disk is widely used as an information recording medium of an optical pickup device for recording / reproducing information in a non-contact manner, and is classified into a compact disk (CD) and a digital versatile disk (DVD) according to the information recording capacity. do. 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.

Here, in the case of a repeatable recordable CD-RW, a basic recording unit capable of recording a certain capacity is called a packet, and the structure of this pattern is shown in FIG. A plurality of run-in blocks 103 and run-out blocks 110 are defined before and after the user data block 105 in which user data is recorded. In addition, the link block 100 is provided at the head of the basic recording unit so that continuous recording can be performed. In the case where the user data block 105 includes a defective area in which partial recording cannot be performed, recording cannot be made in this defective area, and recording must be finished before the defective area. However, when such a defective area is generated, there is no definition of the recording / reproducing method or the disc structure of the optical disc. Therefore, there is a concern that the processing of the defective area may be different for each manufacturer of the disc or the recording / reproducing apparatus, which may cause a problem in terms of compatibility of the disc drive. This problem can occur not only in the CD series disc but also in the DVD series and even the HD-DVD series. There is a need for standardization of optical discs.

The present applicant has disclosed a defect area processing method and a recording medium in which a predetermined linking scheme is applied to a DVD-RW immediately after a defect area in Korean Patent Publication No. 2000-75374.

However, in the case of an optical disc (HD-DVD) having a capacity of 20 GB or more to come in the future, there is no definition of a method and a disc structure for processing when continuous recording or overwriting is performed or when a defective area is generated. Therefore, as described above, a compatibility problem of the disc drive may be caused, and thus recording / playback of the disc may be performed unstable. Therefore, when continuous recording or overwriting is performed in HD-DVD, or when a defective area occurs, a new definition and standard for a recording method and a disc structure corresponding thereto are required.

Accordingly, the present invention has been made to solve the above-described problem, so that linking occurs at the beginning of recording on continuous recording or overwriting of data on an optical disc, and recording is terminated at the last runout of the region to be recorded. It is an object of the present invention to improve the recording / reproducing performance of an optical disc by providing a recording method of an optical disc and an optical disc to ensure compatibility of the recording / reproducing apparatus of the disc.

Still another object of the present invention is to record recording end data which means that recording ends in front of a defective area when a defective area is generated during continuous proxying or overwriting of data, and then linking occurs after the defective area. An object of the present invention is to provide an optical disc and an optical disc recording method in which continuous recording / reproducing is smoothly performed.

1 is a diagram showing a basic recording unit structure applied to a conventional CD-RW.

2A is a diagram illustrating a structure in which data is recorded in one physical cluster.

2B is a diagram showing a recording structure in which data is continuously recorded in a plurality of physical clusters.

3A is a diagram showing a portion where data is to be continuously recorded on an optical disc according to an embodiment of the present invention.

3B is a view for explaining an optical disc and a recording method of the optical disc according to an embodiment of the present invention.

4A is a diagram showing a portion where data is to be continuously recorded on an optical disc according to another embodiment of the present invention.

4B is a view for explaining an optical disc and a recording method of the optical disc according to another embodiment of the present invention.

5A shows a data structure in the case where a defect occurs due to an address error or an ID error in the present invention.

FIG. 5B is a diagram for describing a method of performing linking when a defect occurs due to an address error or an ID error in the present invention.

<Explanation of symbols for main parts of the drawings>

13,13A, 23,23B, 23B ', 23B ", 37A ... Run-in

15,15A, 25,25B, 37 ... physical cluster

18,18 ', 18A, 28,28', 28B, 28B ', 28B ", 37B ... runout

26,36 ... Defect area

In order to achieve the above object, an optical disc recording method according to the present invention comprises the steps of: performing a linking in front of a physical cluster in which recording starts continuously in a method of recording data on an optical disc capable of recording / reproducing; It is characterized by including.

It is preferable to have a run-in and a run-out for accurately recording data before and after the physical cluster, respectively, and to allow linking to occur between the run-in and the run-out in front of the physical cluster where recording starts.

It is characterized by having a run-in and a run-out for accurately recording data before and after the physical cluster, respectively, and recording data indicating the end of recording in the last run-out of the area to be recorded.

The run-in and run-out may further include separate guard 1 and guard 2 for protecting user data, and record guard 2 in the last run out in a different pattern from neighboring guard 2.

The recording includes a case where the recording is successively performed in the blank area which is not recorded after the area that has already been recorded, or overwritten in a part of the area that has already been recorded.

In order to solve the above problems, the optical disc recording method according to the present invention is a method of recording data on an optical disc capable of recording / reproducing, wherein data is continuously recorded on a physical cluster having run in and run out before and after, respectively. When linked, performing linking in front of the physical cluster where data begins to be recorded; And performing a linking in the run-in and run-out following the defective area when the defective area cannot be recorded in the area where recording is performed.

In order to achieve the above object, an optical disc according to the present invention comprises: an optical disc capable of recording and / or reproducing data, comprising: a plurality of physical clusters on which data is recorded; And a run-in and a run-out provided to accurately record data before and after the physical cluster, respectively, wherein the linking occurs between the run-in and the run-out in front of the physical cluster in which recording starts continuously.

In order to achieve the above object, an optical disc according to the present invention comprises: an optical disc capable of recording and / or reproducing data, comprising: a plurality of physical clusters on which data is recorded; Run-in and run-out provided to ensure that data is recorded accurately before and after the physical cluster; Linking in the run-in and runout in front of the recording start area when recording is performed continuously in some areas including the defective area and the physical cluster before the data is recorded or during use. It is characterized by this happening.

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.

FIG. 2A illustrates a case in which data is recorded in one physical cluster 5 in an optical disk capable of recording and / or reproduction, and FIG. 2B illustrates a case where data is continuously recorded in a plurality of physical clusters 15. Respectively. The physical cluster (5) 15 includes 32 data frames with a capacity of 2 KB, and includes a sync frame indicating a sink and data for controlling DC offset and an error correction code (ECC) for error correction. It is configured by. Here, the ECC may be configured of 64 KB.

Run-in (3) 13 and run-out (8) 18 are defined before and after the physical clusters (5) and (15), respectively. These run-in (3) 13 and run-out (8) 18 are areas for data to be accurately recorded in the physical cluster (5) 15 when data is recorded / reproduced. That is, when the data is to be recorded and the data is recorded in the run-in (3) 13 or the run-out (8) 18 slightly out of the position, when the data recording start point is within a predetermined allowable range, error correction is performed. Processing to ensure that data is recorded smoothly.

The run-in 13 has a predetermined pattern of guard 1 13a to overcome overwriting caused by an inaccuracy or change of a data recording start point, and signal processing such as locking or synchronizing. It may be configured as a pre-amble 13b for processing. In addition, the runout 18 may also include a post-amble 18a for signal processing and a guard pattern 18b of a predetermined pattern for eliminating overwriting due to a change in the starting point of data recording. Can be. As a result, the guard 1 13a and the guard 2 18b serve as buffers for protecting user data. In addition, the recording of data ends at the last runout 18 of the area to be recorded.

Although the physical cluster is described as an example of the minimum recording unit in which user data is recorded, other sectors, ECC blocks, frames, and the like may also be included.

FIG. 3A illustrates a case where data is recorded in a portion marked A continuously after a plurality of physical clusters 15 in which data has already been recorded. Here, the area A may be a blank area in which no data is recorded, or may be a case in which the overwriting is again performed as a previously recorded area.

As described above, each of the physical clusters 15 includes a run-in 13 and a run-out 18, respectively. By the way, the run-in, physical cluster and runout in the area indicated by A in the drawings are shown as 13A, 15A and 18A, respectively. At this time, the recording method of the optical disc according to the embodiment of the present invention is shown in FIG. 3B as the run-in 13A in front of the area A to be recorded and the run-out 18 'preceding the run-in 13A. Linking occurs between).

The linking does not accurately locate the position to be recorded when data starts to be recorded in some areas of the disc, and recording is smoothly performed when data is recorded in some areas of the runout 18 'or in some areas of the neighboring run-in 13A. To be done. At this time, linking occurs by making error correction corresponding to the portion where recording starts in the predetermined areas of the runout 18 'and the run-in 13A. In other words, the linking is performed by making error correction in case the continuous recording of data does not start at the correct recording start point. In FIG. 3B, an arrow between the runout 18 ′ and the run-in 13A in front of the area A indicates that linking occurs.

The guard 2 18b ′ has a length of 300 channel bits or more, for example, and may be formed of a pattern including at least 3T and 5T. Here, 3T, 5T and the like represent the length unit of the mark recorded on the disc.

As described above, linking occurs between the run-out 18 'and the run-in 13A in front of the area A in which recording is to be performed, so that continuous recording or overwriting is smoothly performed. Subsequently, recording starts in the physical cluster 15A following the run-in 13A, and the recording is completed by recording guard 2 in the last runout 18A of the region to be recorded with a pattern different from neighboring guard 2. Indicates.

Here, the physical cluster 15A is made up of, for example, 496 recording frames (Rec.Frame) 15A-1, 15A-2... And these run frames are shown after run-in 13A. The 496th recording frame 15-496 of the physical cluster is shown in front of the runout 18 '.

In the above embodiment, the case where the recording is performed in one physical cluster 15A is exemplified, but the same applies to the case where the recording is continuously performed on a plurality of physical clusters. That is, when continuously recording or overwriting a plurality of physical clusters, linking is performed between the run-in and the run-out in front of the region where the recording starts. The above recording method can be applied both to the case where recording is continuously performed on a blank area that has not been recorded after the area that has already been recorded, and when overwriting is performed on a part of the area that has already been recorded. have.

The optical disc recorded according to this embodiment is adapted to cause linking at runout 18 'and run-in 13A in front of the area to be recorded when recording is performed continuously or when overwriting is performed. It features. Then, the guard 2 of the last runout 18A in the area to be recorded is recorded so as to have a pattern different from the neighboring guard 2, indicating that the recording is finished.

Next, an optical disc and an optical disc recording method according to another embodiment of the present invention will be described.

FIG. 4A shows a case where a defective area 26 cannot be recorded / reproduced when data is recorded / reproduced in a plurality of physical clusters 25 in an optical disk capable of recording / reproducing. At this time, the address of the defect area 26 is stored in the defect list area. The defect area 26 includes not only a case generated when recording / reproducing data, but also a case generated when verifying a disc. Before and after the physical cluster 25, run-in 23 and run-out 28 are defined to ensure that data is recorded accurately. The run-in 23 performs signal processing, such as locking or synchronizing, with a guard 1 of a predetermined pattern to overcome overwriting caused by an inaccuracy or a change in the start point of data recording. It may be configured as a pre-amble. In addition, the runout 28 may also include a post-amble for signal processing and guard 2 of a predetermined pattern for solving overwrite due to a change in the starting point of data recording.

The optical disc recording method according to another embodiment of the present invention is applied to the case where recording is performed on the optical disc including the defective area 26 as described above. In FIG. 4A, the area to be recorded is indicated by B. In FIG. The physical clusters and runouts, which are the runs of the area to be recorded, are denoted with B in their respective reference numerals. Here, the recording includes a case where recording is successively performed in a blank area in which subsequent data is not recorded after the already recorded area, and when overwriting is performed in some areas of the already recorded area.

First, as shown in FIG. 4B, linking is performed so that recording starts between the runout 28 and the run-in 23B immediately before the recording area B. FIG. The linking is performed by making error correction within a predetermined allowance in case the recording does not start at the correct recording start point when the recording starts in front of the physical cluster 25B where the recording starts. In the drawing, the linking is indicated by an arrow, and the linking is applied in the same manner as described above with reference to FIG. 3B, and thus detailed description thereof will be omitted.

Next, since recording cannot be continued in the defect area 26, recording end data indicating that recording is finished is recorded in the runout 28B in front of the defect area 26. In FIG. This recording end data can be recorded in the guard 2 and recorded so as to have a different pattern from the neighboring guard 2.

Subsequently, linking occurs in the runout 28B 'and the run-in 23B "subsequent to the defective area 26 when recording is resumed after the defective area 26. The linking is performed in the same manner as described above. In FIG. 4B, an arrow between the runout 28B 'and the run-in 23B "following the defect area 26 indicates that linking occurs. In addition, the recording end data can be recorded by recording the guard 2 in the last runout 28B ″ of the recording area B in a pattern different from the neighboring guard 2.

In particular, a defective area may be generated due to an address information error or an ID error or the like on the optical disk capable of recording and / or reproducing. For example, if an address information error or ID error occurs when the first recording is performed on a blank disc, run in and run out are not generated in the defective area 36 where such an error occurs as shown in FIG. 5A. FIG. 5A shows a state in which writing has not yet been performed after the defective area 36. Referring to FIG. 5B, when recording is performed after the defective area 36, run-in 37A and run-out 37B are provided before and after the physical cluster 37 following the defective area, and the defective area ( It is desirable to allow linking to be performed between the trailing end of 36 and the run-in 37A following the defect area 36.

Defects due to such an address information error or ID error may occur during disc verifying or when writing to a blank disc without disc verifying. In the case of a defect due to an address information error, an ID error, or the like, unlike a defect caused by another cause, no run-in and run-out are generated because no data is recorded in this area. Therefore, there is a need to present a method for treating a defective area in a manner different from defects caused by other causes. In this case, as shown in FIG. 5B, linking occurs between the trailing defect area 36 and the following run-in 37A. In addition, the recording end data can be recorded by recording the guard 2 in the last runout 37B at the end of the recording in a different pattern from the neighboring guard 2.

In the present invention, an optical disc recorded by the recording method as described above is disclosed. 3B and 4B, when the recording is performed again after data is recorded, with reference to FIGS. 3B and 4B, the run outs 18 'and 28' in front of the recording areas A and B and run-in 13A are provided. Linking is to occur at 23B. In this case, the recording is performed when the recording is continuously performed in a blank area that is not recorded subsequent to the area that has already been recorded, and when the overwriting is performed in a part of the area that has already been recorded. It includes everything. Then, recording end data is recorded in front of the defect area 26, which means that recording ends.

In addition, linking occurs in the runout 28B 'and the run-in 23B "following the defect area 26, and recording is performed in the last runout 18A (28B") of the recording area A (B). It ends. At this time, the guard 2 in the last run out 18A (28B ″) can be recorded so as to have a different pattern from the neighboring guard 2 to indicate the recording end data.

Meanwhile, a defective area may be generated due to an address information error or an ID error. In this case, run-in and run-out are not generated in the defect area 36 as shown in Fig. 5A. A reliable physical cluster 37 is provided next to the defective area 36, and run-in 37A and run-out 37B are provided before and after the physical cluster 37, respectively. At this time, it is preferable that linking is performed between the trailing edge of the defective area 36 and the run-in 37A following the defective area.

When recording / reproducing the optical disc according to the present invention, a light source having a wavelength of 900 nm or less is used, more preferably a light source having a blue violet wavelength. Further, an objective lens having a numerical aperture NA in the range of 0.4-1.3, more preferably an objective lens having a numerical aperture in the range of 0.7-1.3 is used. Further, the track pitch of the disc is 1.6 mu m or less, more preferably 0.35 mu m or less, the minimum recording mark has a length of 1 mu m or less, more preferably 0.2 mu m or less, and the minimum recording unit can be composed of 2 KB or more. have.

In this way, the linking occurs when data is continuously recorded on the optical disc, when overwriting or when a defective area is generated, and the recording end data is recorded at an appropriate position for more stable and reliable data recording / reproducing. have.

The use of the data structure shown in Figs. 2A and 2B has the advantage that it can be used not only as a recordable disc but also as a data structure of a write once disc or a read only ROM disc.

The optical disc and the recording method of the optical disc according to the present invention allow linking to occur in front of the region where recording starts, when data is continuously recorded, when overwriting, or when recording is performed in an area including a defective area. In this case, the linking occurs after the defective area so that recording / reproducing of data can be performed stably.

Further, data indicating the end of recording is recorded in the runout before the defective area, and recording is terminated at the last runout of the area to be continuous recording or overwriting. In this way, by providing a standard for processing continuous recording, overwriting, and defective areas in an optical disc on which data is recorded, compatibility of the disc recording / reproducing apparatus can be ensured, and thus reliability of recording / reproducing of the optical disc can be improved. .

In addition, using the data structure shown in FIGS. 2A and 2B has the advantage that it can be used not only as a recordable disc several times, but also as a data structure of a write once disc or a read only ROM disc. Maintain consistency of structure.

Claims (27)

In the method of recording data on an optical disc capable of recording / playback, And performing linking in front of the physical cluster in which recording starts to be continuously performed. The method of claim 1, And a run-in and a run-out for accurately recording data in front of and behind the physical cluster, respectively, and causing linking to occur between the run-in and run-out in front of the physical cluster at which recording is started. The method according to claim 1 or 2, And a run-in and a run-out for ensuring that data is recorded correctly before and after the physical cluster, respectively, and recording data indicating the end of recording in the last runout of the area to be recorded. The method of claim 3, The run-in and run-out further includes separate guard 1 and guard 2 for protecting user data, and recording guard 2 in the last run out in a different pattern from neighboring guard 2. The method according to claim 1, 2 or 4, The recording method is characterized in that the recording is successively performed in the blank area which has not been recorded after the area which has already been recorded. The method according to claim 1, 2 or 4, An optical disc recording method, wherein recording is overwriting on a part of an area that has already been recorded. In the method for recording data on an optical disc capable of recording / playback, Performing linking in front of the physical cluster where data starts to be recorded when data is continuously recorded on the physical cluster having run-in and run-out, respectively, before and after; And performing a linking in the run-in and run-out following the defective area when the defective area cannot be recorded in the area where recording is to be performed. The method of claim 7, wherein The run-in and run-out further comprises a separate guard 1 and guard 2 for protecting user data. The method of claim 8, And recording of the guard 2 of the runout in front of the defective area in a pattern different from that of the neighboring guard 2 to indicate that recording is terminated. The method according to any one of claims 7 to 9, And recording of the guard 2 in the runout following the last physical cluster at which data recording is completed in a different pattern from the neighboring guard 2 to indicate that the recording is finished. The method according to any one of claims 7 to 9, The recording of data is performed continuously in a blank area which has not been recorded after the area which has already been recorded. The method according to any one of claims 7 to 9, An optical disc recording method, wherein data recording is overwritten on a part of an already recorded area. In an optical disc capable of recording and / or playing back data, A plurality of physical clusters in which data is recorded; And a run-in and a run-out provided to ensure that data is recorded accurately before and after the physical cluster, respectively. An optical disc, characterized in that linking takes place between a run-in and a run-out in front of a physical cluster where recording starts to be performed continuously. The method of claim 13, And the data indicating that recording ends in the last runout of the area where data recording ends. The method of claim 14, The runout is provided with a guard 2 for protecting user data, and the guard in the last runout is recorded in a different pattern from the neighboring guard 2, indicating that the data ends. The method according to any one of claims 13 to 15, And the recording is successively performed in a blank area which has not been recorded after the area which has already been recorded. The method according to any one of claims 13 to 15, And the recording is overwritten on a part of the area which has already been recorded. In an optical disc capable of recording and / or playing back data, A plurality of physical clusters in which data is recorded; Run-in and run-out provided to ensure that data is recorded accurately before and after the physical cluster; A defect area in which a defect occurred before or during recording of data; And linking occurs in the run-in and run-out in front of the region where recording starts when recording is successively performed in the defective region and in some regions including the physical cluster. The method of claim 18, And data indicating that recording is to end in the runout in front of the defective area. The method of claim 19, The runout is provided with a guard 2 for protecting user data, and the guard 2 in the runout in front of the defective area is recorded in a different pattern from the neighboring guard 2, indicating that recording is completed. The method according to any one of claims 18 to 20, And processing so that linking occurs between a run-in and a run-out next to the defective area. The method according to any one of claims 18 to 20, And data indicating that recording ends in the last runout of an area where recording ends. The method of claim 22, The runout is provided with a guard 2 for protecting user data, and the guard 2 is recorded in a different pattern from the neighboring guard 2 to indicate that recording is terminated. The method according to claim 18, 19, 20 or 23, And the recording is successively performed in a blank area which has not been recorded after the area which has already been recorded. The method according to claim 18, 19, 20 or 23, And the recording is overwritten on a part of the area which has already been recorded. The method of claim 18, And the linking is performed between the rear end of the defective area and the run-in of a physical cluster following the defective area when the defective area is generated due to an address information error or an ID error. In the method for recording data on an optical disc capable of recording / playback, Performing a linking between the rear of the defective area and the run-in of a physical cluster following the defective area when a defective area is generated due to an address information error or an ID error, etc., in the area where recording is performed. Optical disc recording method.