KR20060008161A - Method of recording / reproducing in high density optical disc - Google Patents

Abstract

The present invention relates to a high density optical disc, and more particularly, to a method of recording and reproducing data using PAC in a high density optical disc such as a Blu-ray Disc. According to the present invention, at least one or more recording / reproducing information of data for the high-density optical disc is recorded on the high-density optical disc in the high-density optical disc allocated to the lead-in area, the spare area, the user data area, and the lead-out area. In the PAC, the recording / playback control contents for the user data area (segment area when the segment area is defined) and the recording control content for the spare area are in conflict with each other on the disk managed by the "unknown rule" of the PAC. In this case, there is an effect that recording and reproduction of a high density optical disk can be efficiently performed by giving priority to the control contents for either one.

High density optical discs, defect management, PACs, unknown rule

Description

Method of recording and reproducing high density optical discs {Method of recording / reproducing in High density optical disc}

1A to 1B show a PAC region in a high density optical disc according to the present invention.

2 is a view showing the configuration of an info 2 area and an info 1 area of a high density optical disc according to the present invention;

3 is a view showing a structure in which a PAC is recorded on a disk in the high density optical disk according to the present invention;

4 is a view showing the structure of the PAC in the high-density optical disk according to the present invention;

5 is a view showing a segment region in the high density optical disk according to the present invention;

6 is a diagram showing the configuration of an "Unknown PAC Rules" field according to the present invention.

7 is a conceptual diagram showing an alternative recording method of a defective area according to an "unknown rule" according to the present invention;

8 is a diagram illustrating a defect management method according to an "unknown rule" according to an embodiment of the present invention.

9A to 9B are views showing the configuration of an "Unknown PAC Rule" according to another embodiment of the present invention.                 

10 is a block diagram showing a configuration of an optical recording and reproducing apparatus according to the present invention.

The present invention relates to a high density optical disc, and more particularly, to a method of recording and reproducing data using PAC in a high density optical disc such as a Blu-ray Disc.

As optical recording media, optical disks capable of recording large amounts of data are widely used. Among them, recently, a new high-density optical recording medium (HD-DVD) capable of recording and storing high-definition video data and high-quality audio data for a long time, for example, Blu-ray Disc (hereinafter referred to as "BD"). ) Is being developed.

Blu-ray Disc (BD), the next-generation HD-DVD technology, is a next-generation optical recording solution that can contain data that significantly surpasses the existing DVD. Recently, the world's standard technical specifications with other digital devices have been established.

In relation to the Blu-ray Disc (BD), various standard proposals have been prepared, followed by a rewritable Blu-ray Disc (BD-RE), a write once-only Blu-ray Disc (BD-WO), and recording-only playback-only blue. Various standards for ray discs (BD-ROMs) are being prepared.

During this standardization process, recently, when a new feature of the Blu-ray Disc is to be introduced into a new version, a problem that is caused by the failure to support the legacy drive is supported. For this purpose, a physical access control (PAC) method has been proposed, and various methods for controlling read / write of data on the entire disk or a specific area using the PAC are performed in the physical area of the disk. This is being discussed.

Accordingly, an object of the present invention was created in view of the above situation, and proposes a PAC method and a data recording and reproducing apparatus and method using the same in a high density optical disc.

Another object of the present invention is to propose an efficient defect management method by the unknown rule of the PAC.

According to one or more embodiments of the present invention, there is provided a recording and reproducing method of a high density optical disc, wherein the recording and reproducing information of the data for the high density optical disc is recorded on the high density optical disc, If the recording / playback control content for the user data area (segment area if the segment area is defined) among the disk-like areas managed by the "unknown rule" and the recording control content for the spare area conflict with each other, control on either one. The content is characterized by priority.

In the case where the control contents of the control area of the control contents are prioritized, the recording control contents of the spare area may be forcibly recorded.

If the control content of the user data area of the control content is prioritized, the spare area is set not to be controlled by the "unknown rule".

According to another embodiment of the present invention, a recording and reproducing method of a high density optical disc includes at least one PAC in which recording and reproducing information of data for the high density optical disc is recorded on the high density optical disc, and is managed by an "unknown rule" of the PAC. When the recording / playback control content for the user data area (segment area when the segment area is defined) and the recording control content for the spare area are in conflict with each other on the disk, an ore function is applied to the control content. do.

Best Mode for Carrying Out the Invention A preferred embodiment of a method for recording and reproducing a high density optical disc according to the present invention will now be described in detail with reference to the accompanying drawings. In addition, the term used in the present invention was selected a general term that is widely used at present, but according to the emergence of a new technology, the term that the applicant deemed most appropriate in the present invention was arbitrarily used, and the meaning of the term in the corresponding description. It will be explained clearly. Therefore, in the understanding of the present invention, it is intended that the present invention should be understood as the meaning of terms rather than simple names of terms.

In relation to this, the meaning of "PAC (Physical Access Control)" used in the present invention means that on the disc for the purpose of controlling the recording and reproduction of data for the entire disc or specific area in the physical area of the disc. Meaning additional information to be recorded (Additional Information), in the present specification it is named "PAC", "PAC information" or "PAC control information" for convenience, and all are used in the same meaning.

In addition, the area on the disk where the PAC is recorded is named "PAC Zone" for convenience, and the PAC is recorded in cluster units in the PAC area on the disk. We will call it "cluster".

In addition, the PAC according to the present invention has an " unknown rule " for limiting the read / write of data on the entire disk or a specific area for a drive that does not know a specific PAC_ID including a legacy drive. The PAC to which the "unknown rule" is applied is called "Unknown PAC" for convenience, and the PAC to which "PAC specific information" which is a "known rule" applied to the specific PAC_ID is known and recorded in the PAC is applied. For convenience, we call it "Known PAC."

A form in which such a PAC is recorded in the PAC area, and a method and apparatus for recording and reproducing data using the same will be described with reference to the accompanying drawings.

1A to 1B show a PAC area in a high density optical disc according to the present invention.

First, as shown in FIG. 1A, a single layer disc having a recording layer of one of the high density optical discs is largely a lead-in zone and a data zone in the circumferential direction from the inner circumference of the disc. The lead-out zones are separately allocated. In the data zone, an inner spare area (ISA) and an outer spare area (OSA) for replacing a defective area exist in the inner and outer peripheries of the data area, respectively. There is a user data area (User Data Area) for recording user data.

In the lead-in zone, an info 2 area and an info 1 area in which various types of management information of a disc are recorded are allocated and allocated to the info 2 area and the info 1 area. Each PAC region in accordance with the present invention is present.

In this case, the PAC area allocated to the info 2 area is called a PAC 2 area for convenience, and the PAC area allocated to the info 1 area is called a PAC 1 area. PACs recorded in the PAC 1 area and the PAC 2 area are recorded with the same information in case of sudden power-down, and the PAC recorded in the PAC 1 area of the Info 1 is updated first. A copy is recorded in the PAC 2 area of Info 2.

Meanwhile, FIG. 1B is a diagram illustrating a structure of a dual layer disk having two recording layers. As shown in FIG. 1B, the dual layer disk includes a first recording layer (L0: Layer 0) and a second layer. Each recording layer is provided with a recording layer L1 (Layer 1), and each recording layer has a lead-in / out area (also called an inner zone) and a data area. ), Outer zones (Outer Zones 0, 1) are allocated separately. Spare areas ISA0, ISA1, OSA0, OSA1 and user data areas are separately allocated in the data zone of each recording layer.

In the lead-in area (inner area 0) and lead-out area (inner area 1), an info 2 area and an info 1 area in which various types of management information of a disc are recorded are allocated. Each of the Info2 area and the Info1 area has a PAC area according to the present invention.

In this case, like the single-layer disc, the PAC area allocated to the Info 2 area of the lead-in and lead-out area is called the PAC 2 area for convenience, and is assigned to the Info 1 area of the lead-in and lead-out area. The PAC region is called a PAC 1 region. PACs recorded in the PAC 1 area of Info 1 and the PAC 2 area of Info 2 are all recorded with the same information, and the PACs recorded in the PAC 1 area of Info 1 are updated first, and a copy thereof is Info 2 Is recorded in the PAC 2 area.

In this case, as shown in FIG. 1B, since the PAC 1 and PAC 2 regions exist not only in the lead-in region but also in the lead-out region, the dual layer disk has twice the size of the PAC region of the single layer disk. will be.

As mentioned above, the PAC area is for recording / reproducing control of data on the entire disk or a specific area. For this purpose, the PAC area has an “unknown rule” for limiting recording / reproduction of a drive. It is characterized by.

The disk area managed by the " unknown rule " includes a disc management area (DMA) area, a spare area, a user data area, and the like. A segment area, which is a predetermined area on a disk to which unknown rule "is applied, may be divided and allocated. (More details about the segment will be described later.)                     

In other words, using an "unknown rule", the optical disc capable of linear replacement of a defective area from a basic operation of the above-listed areas, for example, recording, reproducing, etc. It defines a rule for controlling logical overwrite of (BD-WO).

Therefore, a problem (ex, unnecessary access, etc.) that may be caused by not recognizing the function added in the new version of the drive through the "unknown rule" of the PAC recorded in the PAC area in the conventional version of the drive can be solved. By defining the accessible area on the disk in the physical area on the disk, it provides more robust protection to the area where data is recorded and prevents illegal access from outside such as hacking. More detailed functions will be described later.)

Meanwhile, the info 2 area and the info 1 area in the lead-in area including the PAC 2 area and the PAC 1 area (including the lead-out area in the case of a dual layer disc) will be described according to the recordable characteristics of the high density optical disc. .

2 is a diagram showing the configuration of the info 2 area and the info 1 area of the high density optical disc according to the present invention.

As shown in FIG. 2, in the case of a rewritable high-density optical disc (BD-RE) among the high-density optical discs, the Info 2 area includes a PAC 2 area having a size of 32 clusters according to the present invention, and DMA (Defect Management) of 32 clusters for defect management. It consists of 256 clusters including an Area) 2 area, a 32 cluster CD (Control Data) 2 area where control information is recorded, and a 32 cluster BZ (Buffer Zone) 3 area which is a buffer area.

In addition, the Info 1 area is a buffer zone (BZ) area of 32 clusters as a buffer area, a drive area of 32 clusters as a drive area for storing drive-specific information, and a DMA 1 area of 32 clusters as a defect management area. And a CD 1 area of 32 clusters in which control information is recorded, and a PAC 1 area according to the present invention.

In the case of a write once high-density optical disc (BD-R), the Info2 area includes 256 clusters including 32 clusters of PAC 2 area, DMA 2 area, CD 2 area, and BZ 3 area. One area is composed of 256 clusters including 32 BZ 2 areas, DMA 1 area, CD 1 area, PAC 1 area, and 128 cluster drive areas.

In the case of a high-density optical disc (BD-ROM) for exclusive use of reproduction, 256 clusters including 32 clusters of PAC 2 area, CD 2 area, and BZ 3 area are provided in the Info 2 area, and the Info 1 area is 32 clusters. It consists of 256 clusters including each CD 1 area and PAC 1 area.

As described above, the PAC area according to the present invention is allocated to the Info2 area and the Info1 area to have a size of 32 clusters, respectively, according to the recordable characteristics of the high density optical disc.

One PAC is allocated to have a size of one cluster in a PAC area having a size of 32 clusters (or 64 clusters), and a plurality of PACs having a size of one cluster may exist as needed. Referring to Figure 3 attached to the form in which one PAC is recorded in the size of one cluster as follows.                     

3 is a view showing a structure in which a PAC is recorded on a disc in the high density optical disc according to the present invention.

As shown in FIG. 3, one PAC having a size of one cluster (a concept such as a frame or a sector) is composed of a header area and a specific information area specific to an optical disk drive. do.

In this case, 384 bytes are allocated to the first 1 frame of the PAC in the header area of the PAC to record various PAC information such as an "unknown PAC rule" and information about a segment. PAC Specific Information is configured to be recorded.

A detailed structure of the PAC recorded in such a form will be described with reference to FIG. 4. For convenience of description, specific fields requiring more detailed description of the PAC will be described with reference to the drawings showing the corresponding fields.

4 is a view showing the structure of the PAC in the high-density optical disk according to the present invention.

As shown in FIG. 4, the PAC according to the present invention is largely divided into a header portion (up to 384 bytes of the first frame) and an area in which specific information specific to the PAC is recorded.

The header part is again 4 bytes of "PAC_ID", 4 bytes of "PAC Update Count", 4 bytes of "Unknown PAC Rules", 1 byte of "Entire_Disc_Flag", 1 byte of "Number of Segments", and 8 bytes of each A total of 32 "segments (Segment_0 to Segment_31)" are included.

The "PAC_ID" is a field for providing a status and identification code of the current PAC. For example, if "00 00 00 00h" is recorded, it indicates that the current PAC is not used and is recorded as 'FF FF FF FFh'. If so, the current PAC field is used as code to indicate that it was used in the past but is available again.

In addition, by recording with a predetermined bit such as '54 53 54 00h ', it is utilized as a code for checking whether the current drive is a freely accessible disk. That is, if the current drive does not know the "PAC_ID" input as described above, it is determined that the current PAC is not understood because of a different version or the like, so that the information recorded in the "Unknown PAC Rules" field is referred to. It is used as code.

In addition, the "PAC Update Count" field is a field indicating the number of updates of the PAC. Initially, 0 is recorded, and then incremented by one each time the PAC is re-written.

In addition, the "Entire Disc Flag" field is a field indicating whether re-initialization is allowed. For example, one bit of one byte (8 bits) allocated to the "Entire Disc Flag" field. Is used to indicate that reinitialization is allowed when b0 is 0 and to indicate that reinitialization is not allowed when b0 is 1. Of course, this reinitialization is applied when the recording characteristic of the high density optical disc is rewritable (BD-RE).

In addition, the "number of Segments" field is a field indicating the number of segment areas to which the PAC is applied. Up to 32 segments can be allocated in one PAC. Information about the location of the allocated segments is recorded in 8-byte fields "Segment_0" to "Segment_31". In the fields "Segment_0 to 31", the first physical sector number (PSN) of the first cluster of the segment region is recorded in the first 4 bytes, respectively, and the last physical of the last cluster of the segment region is recorded in the next 4 bytes. The sector number is recorded.

A more detailed description of the segment will now be described with reference to the accompanying drawings.

5 is a view showing a segment region in the high density optical disc according to the present invention.

As shown in FIG. 5, up to 32 segment areas to which PAC is applied in the high density optical disc may be sequentially allocated from the "segment 0" area as necessary. That is, up to 32 segments managed by one PAC can be allocated in ascending order from "segment 0", and even when there are a plurality of PACs, the total number of segment areas managed by each PAC is 32. (One optical disc has a maximum of 32 segment areas.)

In this case, the start position of the allocated segment area is the first PSN of the first cluster, and the last position is the last PSN of the last cluster. This is recorded in the "Segment" field so that the optical disc drive can locate the segment area.

At this time, segment areas allocated and managed by one PAC do not overlap each other, and start and end positions are allocated to boundary areas between clusters.

Meanwhile, as described above, the "Unknown PAC Rules" field of FIG. 4 is used as a field for specifying an operation range of a drive that does not understand the current PAC. Referring to FIG.

6 is a diagram illustrating the configuration of an "Unknown PAC Rules" field according to the present invention.

As shown in FIG. 6, it is possible to define whether or not the various areas of the disc can be controlled through the "Unknown PAC Rules" field represented by 4 bytes (32 bits). At this time, "Area" on the table represents controllable areas of the disc, "Bits" represents a control bit, and "Control type" represents a control type such as recording / reproducing.

Through this, the controllable areas of the "Unknown PAC Rules" field will be described. First, "DMA zones (DMA Zones, Disc Definition Structure (DDS) are not included)" present in the Info 1,2,3,4 areas. It is possible to indicate that the recording control is possible for the "Spare Areas" in the Data Zones, and that the recording control is possible. It is possible to control recording and reproducing for the CD (Control Data Zones), and to control recording and reproducing for the "User Data Area" of the data area. "Cluster" may indicate that recording and reproduction control are possible.

In this case, it is indicated that only one control of the recording / reproduction control contents is possible, and the other control is not performed. That is, as in the case of the "Spare Areas", when only the recording control contents are shown, the reproduction of the "Spare Areas" is not controlled by the unknown rule.

In addition, the following rules apply to the remaining areas except for the "PAC cluster".

That is, when the control type is write (ex, Bits = b3, b5, b6, b7, ...), if the allocated bit is set to '0', the corresponding area is written to the corresponding area. This is possible, indicating that if the assigned bit is set to '1' no writing is possible for that area.

In addition, when the controllable form is read (ex, Bits = b2, b4, ...), if the assigned bit is set to '0', playback of the corresponding area is possible. If it is set to '1', it means that playback of the area is not possible.

On the other hand, for the "PAC cluster" area, when the controllable form is write (Bits = b1), when the allocated bit is '0', it indicates that the superimposed recording on the current PAC is possible. In addition, if the allocated bit is '1', it indicates that overlapping recording for the current PAC is impossible.                     

Also, when the controllable form is read (Bits = b0) for the " PAC cluster " area, if the assigned bit is '0', the contents of the play and the current cluster are stored outside the drive (ex, host, etc.). Indicates that transmission to) is possible. In addition, if the allocated bit is '1', the contents of the current PAC cluster (so-called "known rule") except for the first 384 bytes (so-called PAC header portion) of the first data frame may not be transmitted to the outside of the drive. This can be set if you only want to control the disc with an "unknown rule."

In this case, in the case of the user data area, when the segment area, which is a specific area on the disk, is defined, the user data area is used as a field indicating whether recording and reproduction control is possible for the segment area instead of the entire user data area. .

With respect to the " unknown rule " defined above, there may be a case where the recording control contents for the spare area and the recording control contents for the segment area are in conflict with each other when the user data area or the segment area is defined.

That is, when a defective cluster is found during recording or reproducing of data for the user data area or segment area, the data to be recorded in the defective cluster is replaced with the spare area. The case where the recording control contents set in the spare area and the recording control contents set in the user data area (segment area) may conflict with each other. This will be described with reference to the accompanying drawings.                     

FIG. 7 is a conceptual diagram illustrating an alternative recording method for a defect area that can be detected when recording / reproducing a user data area or a segment area managed by an "unknown rule" according to the present invention.

As shown in FIG. 7, when a user data area or a segment area is defined, when a defect area is detected during recording / reproducing of the segment area, data to be recorded in the defect area is recorded. Alternate records in the Spare Area (ISA or OSA).

When the replacement recording is performed in the spare area as described above, the replacement recorded position information is recorded in the defect management area (DMA) area of the disc as a defect list (DFL) entry. The DMA area is an area existing in a lead-in zone and a lead-out zone, which are management areas on disk.

In the DFL entry, the location information of the detected defect cluster and the location information of the alternately recorded cluster are recorded as a physical sector number. Referring to FIG. 7, the defect cluster A detected in the user data area is described. A, which is the first physical sector number of, is written, and d, which is the first physical sector number of the replacement cluster D of the spare area in which data to be written to the defective cluster A is recorded and written, is written as a DFL entry.

In this case, the DFL entry is recorded together with information on the state to be alternately recorded as "status" field information. That is, the '0000' bit recorded in the "status 1" field of FIG. 7 is a bit for notifying that the defective area is normally recorded and the "0000" bit recorded in the "status 2" field is used by the "status 2" field. It is to inform you that it is not. Therefore, it will be apparent that the bits of the "status" field are changed according to the state in which the defective area is recorded alternately.

On the other hand, such a defect management method is a case where the recording characteristics of the disc are rewritable. If the recording characteristics of the disc are only physically recordable once, the above-described DFL entry is stored on the disc. After recording in the TDMA (Temporary Disc Management Area) area, which is a management area, the data is transferred to the DMA area when the disc is closed.

In the case where the data to be recorded in the defective area is alternately recorded into the spare area, the defect cluster can be recorded / reproduced in the user data area (or segment area) by an "unknown rule" according to the present invention. Even if is found, when the recording control contents for the spare area are impossible to record, it is possible to make an alternative recording impossible. In this case, a treatment method is required, which will be described below with reference to the accompanying drawings.

FIG. 8 is a diagram illustrating a defect management method when an "unknown rule" is applied according to an embodiment of the present invention. In particular, a spare area and a user data area (segment area) of a disk area managed by an "unknown rule" are shown. In this case, the control content between segments) is shown.

As in the case 1 of FIG. 8, the write control bit for the spare area is set to '0' to enable writing to the spare area, and the user data area (segment area is defined). In the case where the write or read control bit for the segment area is set to '0', recording or reproduction for the user data area (segment area) is possible, so that the replacement recording of the defective area is a problem. There is no.

However, as in the case 2 of FIG. 8, the read control bit for the user data area (segment area) is set to '0' so that even if a defective area is found at the time of reproducing data, the spare area does not exist in the spare area. When the write control bit for the write control bit is set to '1', it is impossible to replace the defective area, or as in the case 3 of FIG. 8, the recording of the user data area (segment area) ( write) Even if a defective area is found when data is recorded because the control bit is set to '0', there may be a case where replacement writing of the defective area is impossible because the write control bit for the spare area is set to '1'.

In addition, although not shown, both the spare area and the user data area (segment area) are set to '1' or irrespective of the recording control content of the spare area. If both recording / playback control contents are set to '1', the detection of the defective area itself will be impossible.

According to the present invention, the recording (reproducing) restriction setting between the spare area and the user data area (segment area) is operated as an OR function. In other words, when the recording (reproducing) restriction is set in either the spare area or the user data area (segment area), the replacement recording of the defective area is made impossible.

Therefore, when recording to the spare area is limited, and when recording or reproducing is permitted for the user data area (segment area), it is impossible to alternately record the defective area by the ore function. It can be seen that the write limit bit set in is used as a bit for limiting alternative writes to the spare area.

Therefore, in such a case, the defect management will use a method of recording only the positional information on the defective area as DFL information, without alternatively recording the spare area.

On the other hand, according to another embodiment of the present invention, a method of setting one of the recording restriction contents for the spare area and the recording / reproduction restriction contents for the user data area (segment area) is used.

That is, priority is given to either the recording restriction content for the spare area or the recording / reproduction restriction content for the user data area (segment area) so that replacement recording of the defective area is performed according to the control content of the priority area. will be.

Therefore, when there is a priority on the spare area side, the replacement recording of the defective area is made according to the recording restrictions on the spare area. When the recording of the spare area is possible, the replacement recording of the defective area is performed. If priority is given to the data area (segment area), replacement recording of the defective area is made when recording / reproducing of the user data area (segment area) is possible.

In this way, the priority may be given to either one. However, in the case of giving priority to the spare area, if the recording / reproducing restriction is set in the user data area (segment area), the detection area of the defective area cannot be detected. It would be desirable to give priority to (segment area).

Therefore, if priority is given to the user data area (segment area), the write limit bit for the spare area becomes an insignificant bit, so that the configuration of the "Unknown PAC rule" is processed as shown in the accompanying drawings below.

9A to 9B are views showing the configuration of an "Unknown PAC rule" according to another embodiment of the present invention.

First, as shown in FIG. 9A, a write control bit for a spare area that has been given priority in a user data area (segment area) and has become virtually meaningless, is forced to '0' to enable writing to the spare area. You can use a method to set it.

In other words, priority is given to the user data area (segment area), and if the defective area is detected according to the recording / reproducing restriction content of the user data area (segment area), the recording control bit of the spare area is made to perform replacement recording. It is set to '0'.

Meanwhile, in addition to such a method, a method of completely removing a field for a spare area from the "Unknown PAC rule" may be used as shown in FIG. 9B.

In other words, the priority is given to the user data area (segment area) and the control bits for the spare area that have become meaningless are removed from the field. This is such that the recording control for the spare area is not performed by the "Unknown PAC rule" like the reproduction control for the spare area.

On the other hand, the present invention can be applied to a logical overwrite (LOW) method of alternately recording a spare area when new data is to be recorded in a pre-recorded area on a write once high-density optical disc (BD-WO). It will be self explanatory.

10 is a block diagram showing the configuration of an optical recording and reproducing apparatus in which the technical idea according to the present invention is implemented.

As shown in FIG. 10, the optical recording and reproducing apparatus according to the present invention includes a recording / reproducing device 10 for recording and reproducing an optical disk, and a host or controller 20 for controlling the recording / reproducing device 10. (The recording and reproducing section 10 is often referred to as " optical disk drive ", and it is clear that this is used interchangeably herein.)

That is, the host 20 issues a recording or reproducing command to a specific area of the optical disc to the recording and reproducing section 10, and the recording and reproducing section 10 records and reproduces to a specific area according to the command of the host 20. Will be operated to perform

In this case, the recording and reproducing unit 10 specifically includes an interface unit 12 which communicates data and commands with the host 20, and records or reads data directly on an optical disc. A pickup processor 11 and a data processor 13 for receiving a signal read out from the pickup unit 11 and restoring the signal to a desired signal value, or for modulating a signal to be recorded into a signal recorded on an optical disc. And a servo unit 14 for controlling the pick-up unit 11 to accurately read signals from the optical disc or to accurately record signals on the optical disc, and a memory 15 for temporarily storing various information and data including management information. ) And a microcomputer 16 that controls the components in the recording and playback section 10.

A method of recording a PAC according to the present invention on a high-density optical disc recordable using the optical recording and reproducing apparatus configured as described above is as follows.

Initially, when an optical disc is inserted into an optical recording and reproducing apparatus, all management information in the optical disc is read out and stored in a memory in the recording and reproducing section 10, and these management information is utilized in recording and reproducing the optical disc.

In this state, when the user wants to record in a specific area of the optical disc, the host 20 transfers the data to the recording / playback section 10 with the data to record the desired position information as a recording command.

The microcomputer 16 in the recording / reproducing section 10 receives the recording command and checks whether or not the area in the optical disc to which the host 20 wants to record is a defective area or the like from management information stored in the memory 15. Then, data is recorded in an area other than the defective area according to the recording command of the host 20.                     

At this time, the microcomputer 16 of the recording / reproducing section 10 is intended to limit the functions such as recording or reproducing the entire disc or a specific area according to a user's request, or a conventional version of the recording / reproducing apparatus. If it is determined that the conventional recording / reproducing apparatus does not recognize the new feature, the control information about the area is recorded in the PAC Zone on the disc as " Unknown PAC rule ".

At this time, the recording control bit of the spare area is forcibly set to '0' so that the recording / reproducing restriction content for the user data area (segment area if the segment area is defined) and the recording restriction content for the spare area do not collide with each other. Do not set or record a field for controlling the spare area.

The PAC information is recorded as a plurality of valid PACs (Valid PACs) in the size of 1 cluster in the PAC 1 area of the Info 1 area as needed, and the backup data is stored in the PAC 2 area of the Info 2 area as a back-up. Record a copy of the PAC recorded in the PAC 1 area.

To this end, the microcomputer 16 transfers the position information and data of the area where the data is recorded or the PAC area to the servo 14 and the data processor 13, and through the pickup unit 11, a desired position in the optical disc. Allow the record to complete.

On the other hand, a method of recording and reproducing a high-density optical disc on which a PAC is recorded in this manner is as follows.

Initially, when an optical disc is inserted into an optical recording and reproducing apparatus, all management information in the optical disc is read out and stored in a memory in the recording and reproducing section 10, and these management information is utilized in recording and reproducing the optical disc.

In this case, the information stored in the memory 10 includes location information of various areas including the PAC area on the disc. Thereafter, the PAC_ID of the PAC in the PAC region is checked to determine whether the PAC_ID is a recognizable PAC_ID.

If the recorded PAC_ID is recognizable as a result of the check, it is determined that the version is the same as that of the recording / reproducing apparatus which records the data on the disk or there is no separate recording / reproducing, and then recording / reproducing is performed according to the command of the host 20. .

In addition, if the code recorded in the PAC_ID is not recognized, it is determined that there is a recording / playback restriction due to the version being recorded by another recording / playback apparatus. In this case, the recording on the disc recorded with the "Unknown PAC Rules" Recording / reproducing is performed according to the command of the host 20 with reference to the / playback restriction area.

In this case, when the recording / playback restriction contents for the user data area (segment area in the case of the segment area is defined) and the recording restriction contents for the spare area collide with each other according to the "Unknown PAC Rules", In order to operate with an or function according to an embodiment, or to record / reproduce in accordance with the control content of the priority side according to another embodiment of the present invention.

To this end, the microcomputer 16 transmits the position information and data according to the command of the host to the servo 14 and the data processor 13, and records / reproduces at a desired position in the optical disc through the pickup unit 11. Allow this to complete.

As described above, the recording and reproducing method of the high density optical disc according to the present invention provides a method of managing a defective area of the high density optical disc in the case where the "unknown rule" is applied so that the recording and reproducing of the high density optical disc can be performed efficiently. It is effective.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (15)

In the high-density optical disc allocated to the lead-in area, spare area, user data area, and lead-out area, Having at least one PAC in which the recording / reproducing information of the data for the high density optical disc is recorded on the high density optical disc, If the recording / playback control content for the user data area (segment area if a segment area is defined) and the recording control content for the spare area are conflicted with each other on the disk area managed by the " unknown rule " The method for recording and reproducing a high density optical disc, characterized in that the contents of the control for the image are given priority. The method of claim 1, And said at least one PAC is recorded in a PAC area of said high density optical disc. The method of claim 2, And the PAC area is allocated to the info 2 area and the info 1 area in the high density optical disc, respectively. The method of claim 1, And said segment area is a specific area on a disc managed by said " unknown rule. &Quot; The method of claim 4, wherein And said segment area is defined as "first physical sector number of the first cluster" and "last physical sector number of the last cluster" in the "Segment" field of the PAC. The method of claim 1, The conflicting method is a method of recording and reproducing a data to be recorded in the user data area in a spare area for defect management or logical overlapping of the disk. The method of claim 1, And the PAC has " PAC_ID " as a field for providing a status and identification code of the PAC. The method of claim 7, wherein The " unknown rule " is a rule applied to a drive that does not recognize the " PAC_ID ". The method of claim 1, And a disk-shaped area managed by the " unknown rule " includes a DMA area, a spare area, a control data area, a user data area, and a PAC cluster area. The method of claim 1, The control content for the user data area is given priority. The method of claim 10, And when the control contents for the user data area take precedence, the recording control contents for the spare area are set to be forcibly recordable. The method of claim 10, And setting the control area so as not to control the spare area by the " unknown rule " when the control contents for the user data area are prioritized. In the high-density optical disc allocated to the lead-in area, spare area, user data area, and lead-out area, Having at least one PAC in which the recording / reproducing information of the data for the high density optical disc is recorded on the high density optical disc, If the recording / playback control content for the user data area (segment area if a segment area is defined) and the recording control content for the spare area are conflicted with each other on the disk area managed by the " unknown rule " A recording and reproducing method for a high density optical disc, characterized in that an ore function is applied to the contents. The method of claim 13, The conflicting method is a method of recording and reproducing a data to be recorded in the user data area in a spare area for defect management or logical overlapping of the disk. The method of claim 14, When the recording of the spare area is set to be limited so that replacement recording of the defective area is impossible by the ore function, the recording restriction content set in the spare area is used as a replacement recording limit bit for defect management. Recording and reproducing method of high density optical disc.

Images