KR100739678B1 - Write once disc capable of managing data area, method of managing data area of write once disc, and method for data reproducing from write-once disc - Google Patents

Abstract

Disclosed are a recording disc capable of data area management, a data area management method of a recording disc, a data recording apparatus, a data reproducing method, and apparatus thereof. The write once disc according to the present invention is a write once disc including a lead-in area, a data area and a lead-out area, wherein at least one area for defect management is allocated to the data area. And a predetermined area for recording the area allocation information indicating. According to the present invention, recording of user data such as a spare area for defect management by recording area allocation information about the structure of the data area on a disc so that the data recording and / or reproducing apparatus can recognize the structure of the data area. Areas that are not intended for use can be allocated within the data area to improve the utilization of the recording disc once.

Description

Write once disc capable of managing data area, method of managing data area of write once disc, and method for data reproducing from write-once disc}

1 is a view showing the structure of a write once disc according to a preferred embodiment of the present invention;

2 is a view showing a single recording layer disc capable of data area management according to the first embodiment of the present invention;

3 is a diagram showing the detailed structure of the temporary defect management information area shown in FIG. 2;

4 is a diagram illustrating a detailed structure of a space bit map area illustrated in FIG. 2;

5 is a diagram showing a single recording layer disc capable of data area management according to the second embodiment of the present invention;

FIG. 6 is a diagram showing a detailed structure of the temporary defect management information and the space bit map area shown in FIG. 5;

7 is a diagram showing a single recording layer disc capable of data area management according to the third embodiment of the present invention;

8 is a diagram showing a detailed structure of the temporary defect management area shown in FIG. 7;

9 is a diagram showing a detailed structure of the disk & drive information and space bit map information area shown in FIG. 7;

10 is a view showing a single recording layer disc capable of managing a data area according to a fourth embodiment of the present invention;

11 is a diagram showing the detailed structure of the temporary defect management area 1 shown in FIG. 10;

12 is a diagram illustrating a detailed structure of a cluster in which the temporary defect management information and the space bit map shown in FIG. 11 are recorded together;

13 is a diagram showing a detailed structure of a cluster in which initialization information is recorded when a disk is initialized;

14 is a diagram showing a detailed structure of a cluster in which reinitialization information of a disc is recorded;

15 is a view showing a space bit map area according to an embodiment of the present invention;

16 illustrates a finalized space bit map area according to an embodiment of the present invention;

17 is a block diagram of a data recording and / or reproducing apparatus according to an embodiment of the present invention;                 

18 is a flowchart illustrating a data area management method according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a recording disc, and more particularly, to a recording area capable of allocating data for recording other types of data other than user data to a data area provided on the recording disc once. A method, a data recording device, a data reproducing method, and a device therefor.

Defect management refers to supplementing data loss due to defect occurrence by rewriting user data recorded in a portion where a defect occurs when a defect occurs in the user data recorded in the user data area. Conventionally, defect management is largely divided into a defect management method using linear replacement and a defect management method using skipping replacement. Linear replacement means that when a defect occurs in the user data area, the defective area is replaced with an area where a defect in the spare area provided in the data area does not occur. Skipping refers to the use of areas skipped without using the defective areas, followed by areas that are not defective.

The linear replacement method and the skip method are mainly applied to discs capable of repeatable recording such as DVD-RAM / RW and recording by random access method.                         

On the other hand, in recent years, a method of using a linear replacement method for defect management has been considered even in a write-once disc, which has a characteristic that once data is recorded, it cannot be erased and written again.

However, when data is recorded on the recording disc once, defect management by the linear replacement method by the data recording and / or reproducing apparatus may be difficult due to the characteristics of the data to be recorded. For example, when data is recorded on a recording disc once in real time, defect management by a linear replacement method by the data recording and / or reproducing apparatus is difficult.

Therefore, it is advisable to assign a spare area according to the user's selection for defect management only when defect management is performed by the data recording and / or reproducing apparatus, rather than always providing a spare area on the recording disc once for defect management. Do.

Furthermore, not only the above-mentioned spare area but also areas for recording information for other purposes including defect management can be allocated to the data area as necessary.

By the way, in the case of allocating areas in the data area that are not areas for recording user data, such as a spare area for defect management, by the user's selection, the data recording and / or reproducing apparatus once reconstructs the structure of the data area of the recording disc. There is an unrecognizable problem.

That is, once no information about the structure of the data area has been recorded on the recording disc, the data recording and / or reproducing apparatus has allocated other areas other than the area for recording user data to the data area. If other areas are allocated, it is not possible to determine the location or size of the pure user data area except for the location or size of the allocated area and other areas.

On the other hand, after data is recorded on the disc, information indicating the area in which the data is recorded is recorded in the predetermined area in a bit map format for convenience in data recording or reproduction.

More specifically, the recordable area on the disc is composed of a plurality of clusters, which are data recording units or error correction units. Among these clusters, clusters in which data is recorded and unrecorded clusters are recorded in information in a bitmap format so that the data recording and / or reproducing apparatus can quickly access a desired area for recording or reproducing.

In particular, the usefulness of bit map information indicating an area in which data has been recorded in a recording disc once is very large. In other words, in the case of the recording disc once, in order to record data, it is necessary to quickly find the next cluster of the cluster in which the data is recorded. Therefore, using the bitmap representing the area where data is recorded, it is possible to find the next cluster of the cluster in which data is recorded more quickly.

In addition, by using a bitmap indicating the area where data is recorded, it is possible to check the state change of the recording disc once due to additional recording of data on the recording disc once, and to the recording disc once before the change of the recording disc state The recorded data can be grasped.

 An object of the present invention is to provide a write-once disc for recording and managing data other than user data in a data area.

In addition, another technical problem to be achieved by the present invention is to provide a write once disc that can easily grasp the state of data recording.

Another object of the present invention is to provide a method for managing a data area of a recording disc for recording and managing data other than user data in a data area.

Another object of the present invention is to provide a data recording apparatus for recording and managing data other than user data in a data area.

Further, another technical object of the present invention is to provide a method for reproducing data recorded on a recording disc once in which data of a kind other than user data is recorded in the data area.

Further, another technical object of the present invention is to provide an apparatus for reproducing data recorded on a recording disc once, in which data of a kind other than user data is recorded in the data area.

In order to achieve the above object, the recording disc once according to an aspect of the present invention,

A write once disc comprising a lead-in area, a data area, and a lead-out area, comprising: for recording area allocation information indicating whether at least one area for defect management has been allocated to the data area; It characterized in that it comprises a predetermined area.

In order to achieve the above object, the write once disc according to another aspect of the present invention,

A write once disc comprising at least one recording layer,

At least one data area for recording user data; And at least one predetermined area for recording area allocation information indicating whether at least one area for defect management has been allocated to the at least one data area.

In order to achieve the above another object, the data area management method of a write once disc according to the present invention,

Receiving a command regarding whether to allocate at least one area for defect management to a data area of a write once disk; And recording area allocation information indicating whether or not the area for defect management has been allocated to the data area in accordance with the command in a predetermined area of the recording disc.

In order to achieve the above another object, the data recording apparatus according to the present invention,

A recording / reading unit which records data on a recording disc or reads recorded data once; And area allocation information indicating whether the area for defect management is allocated to the data area according to a command regarding whether to allocate at least one area for defect management to a data area of the write once disk. And a control unit for controlling the recording / reading unit to record the predetermined area of the recording disk once.

According to another aspect of the present invention, there is provided a data reproducing method comprising: accessing a predetermined area of a write once disk to obtain area allocation information; And obtaining location information of at least one area for defect management once allocated to the data area of the recording disc from the area allocation information.

In order to achieve the above object, the data reproducing apparatus according to the present invention comprises: a reading unit which reads data recorded on a recording disc once; And at least one area for defect management allocated to a data area of the recording disk from the area allocation information, the reader controlling the readout unit to obtain area allocation information by accessing a predetermined area of the write once disk. It characterized in that it comprises a control unit for obtaining the position information of the.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the structure of a write-once disc (hereinafter referred to as a disc) according to a preferred embodiment of the present invention.

Referring to Fig. 1A, when the disc is a single recording layer disc having one recording layer LO, it has a disc structure composed of a lead-in area, a data area and a lead-out area. The lead-in area is located on the inner circumferential side of the disk and the lead-out area is located on the outer circumferential side of the disk. The data area is located between the lead-in area and the lead-out area. In the data area, a user data area is located, and a spare area is allocated from the head of the data area by a predetermined size.

Referring to FIG. 1B, in the case where the disc is a dual recording layer disc having two recording layers L0 and L1, the lead-in area, the data area, and the outer area in the recording layer L0 are sequentially from the inner circumference side to the outer circumference side of the disc. In the recording layer L1, an outer area, a data area and a lead-out area are sequentially arranged from the outer circumference side to the inner circumference side of the disc. Unlike the single recording layer disc of Fig. 1A, the lead-out area is also arranged on the inner circumferential side of the disc. That is, the recording path for recording data is an OTP (Opposite Track Path) from the lead-in area of the recording layer L0 to the area outside of the recording layer L0, and then from the area outside of the recording layer L1 to the lead-out area of the recording layer L1. to be. Spare areas are allocated to recording layers L0 and L1, respectively.

In the present embodiment, the spare area exists only between the lead-in area or the outer area and the user data area, but may be disposed at one or more locations as necessary.

First, the initialization of the write once disk according to the present invention will be described.

Initializing a disk is a preliminary preparation process before using the disk. In more detail, in order to utilize the data area of the disc, another area in which information other than user data is recorded is allocated to the data area, such as a spare area for defect management by the recording and / or reproducing apparatus. If so, it refers to a process of recording information on the structure of the data area in a predetermined area of the disc so that the recording and / or reproducing apparatus can recognize the structure of the data area, such as where the area is located.

When the initialization is completed and the initialization information, that is, information about the structure of the data area, is recorded, it is possible to determine whether the data area of the disc has been allocated another area in which information other than the user data is recorded, its location, and the area to record the user data. Can be.

 Hereinafter, an embodiment of a disk in which a spare area for defect management is allocated to a data area according to the present invention will be described with reference to FIGS. 2 to 9.

Fig. 2 is a diagram showing a single recording layer disc capable of data area management according to the first embodiment of the present invention.

The lead-in zone of the disc according to the present embodiment includes defect management areas DMA1 and DMA2, a recording condition test area, a temporary defect management information area (TDDS), and a temporary defect information area (TDDS). TDFL: Temporary DeFect List, a Space Bit Map area, and a Disc and Drive Information area.

Typically, the recording and / or reproducing apparatus reads information in the lead-in area and / or the lead-out area when the disc is loaded to figure out how to manage the disc and how to record or reproduce. The larger the amount of information recorded in the lead-in area and / or the lead-out area, the longer the time required for loading the disc and then preparing for recording or playback occurs. Therefore, in this embodiment, the concept of temporary management information, that is, temporary defect management information and temporary defect information, is introduced, and the temporary defect information area provided separately from the defect management area of the lead-in area and / or the lead-out area or Record it in the temporary defect management information area.

On the other hand, when the data no longer needs to be recorded on the disk, that is, at the time of finalization, the temporary defect information and the temporary defect management information recorded so far are finally recorded in the defect management area. This means that the last meaningful information of the temporary defect information and the temporary defect management information updated and recorded several times is moved to the defect management area so that the recording and / or reproducing apparatus reads the defect management information from the disc in the future. This is because there is an advantage that initialization can be performed more quickly by only reading meaningful information at last, and there is an advantage that reliability of information can be improved by recording defect management information in a plurality of places.

In the present embodiment, since defect management is in accordance with the linear substitution scheme, the temporary defect information is composed of information indicating where the defect is generated and information indicating where the newly replaced region is. More preferably, the temporary defect information further includes information indicating whether the region in which the defect is generated is a single defect cluster or a continuous defect cluster in which physically continuous defects are generated. The temporary defect management information is information for managing the temporary defect information and includes information indicating the location where the temporary defect information is recorded.

The lead-in zone also includes a space bit map (SBM) area corresponding to data recording area information including bit map information about an area in which data is recorded.

The data area includes a spare area (Sparre Area 1, Spare Area 2) and a user data area (User Data Area).

In the present embodiment, when defect management is performed by the recording and / or reproducing apparatus according to the user's selection when the disc is initialized, the spare area 1 is assigned to the head of the data area and the spare area 2 to the rear.

The lead-out zone includes defect management areas DMA3 and DMA4 and other areas.

When the user determines defect management by the recording and / or reproducing apparatus and instructs the recording and / or reproducing apparatus to allocate a spare area, the recording and / or reproducing apparatus is arranged at a predetermined position in the data area, for example, the head and tail of the data area. Spare Area 1 and Spare Area 2 are allocated to a predetermined size of.

The recording and / or reproducing apparatus records the area allocation information, which is information indicating that the spare area has been allocated, in the first cluster of the temporary defect management information area. The area allocation information may be, for example, the size of the allocated spare area. When the start address or the last address of the spare area is determined, for example, when it is determined that spare area 1 is located at the head of the data area and spare area 2 is located at the rear of the data area, only the size information of the spare area is used for recording and / or reproducing apparatus. In addition to recognizing that the spare area is allocated, the location and size of the spare area may be recognized.

However, when the start address or the last address of the spare area is not determined, it is preferable to record the start address and the last address of the spare area, or record the start address or the last address of the spare area and the size information of the spare area.

On the other hand, in this embodiment, the area allocation information is recorded in the temporary defect management information area, but of course, it is also possible to record in other areas as necessary.

After writing the area allocation information to the first cluster of the temporary defect management information area, write the first cluster of the space bit map area, the bit corresponding to the first cluster of the temporary defect management information area, and the first cluster of the space bit map area. The bit map corresponding to the position is '1' and the bit value for the remaining cluster is recorded as '0'.

If the user does not want to manage defects by the data recording and / or reproducing apparatus, the recording and / or reproducing apparatus sends the area allocation information of the size of the spare area 1 and the spare area 2 to '0' in the first defect management area. Write to the cluster.

After the area allocation information is recorded in the temporary defect management information area, a bit corresponding to the first cluster of the temporary defect management information area and a bit corresponding to the position of the first cluster of the space bit map area are assigned to the first cluster of the space bit map area. Set the bitmap to '1' and the bit value for the remaining cluster is '0'.                     

As described above, after the disk allocation information indicating that the spare area is allocated to the data area at the time of initializing the disk is recorded in the temporary defect management information area and the data is recorded on the disk, the disk is reinitialized to update the area allocation information. You can change the structure of. The reinitialization of the disc will be described later with reference to FIG.

On the other hand, if the user does not want defect management by the recording and / or reproducing apparatus, since no information will be recorded in the defect management area (DMA), the area allocation information recorded in the temporary defect management area is recorded in the defect management area. Record even before finalization.

Since the temporary defect management information area does not exist in the rewritable disc, the write once disc in which the area allocation information is recorded in the temporary defect management area cannot be reproduced by the reproducing apparatus of the rewritable disc. Therefore, the information once recorded in the temporary defect management area at the time of finalizing the write once disk is recorded in the defect management area to solve the compatibility problem.

Therefore, in the case where the defect management by the recording and / or reproducing apparatus is not performed, the write once disc is also written by the reproducing apparatus of the rewritable disc by recording the area allocation information recorded in the temporary defect management region before the disc finalization in the defect management region. Can be played back.

FIG. 3 is a diagram illustrating an embodiment of the temporary defect management information area shown in FIG. 2.                     

The temporary defect management information TDDS is recorded in one cluster of the temporary defect management information area at least once until the recording operation is completed. Therefore, a plurality of temporary defect management information TDDS # 0, TDDS # 1, ... are recorded in the temporary defect management information area.

On the other hand, in this embodiment, the temporary defect management information is recorded in one cluster of the temporary defect management information area once when the recording operation is completed.

Referring to FIG. 3, the temporary defect management information area is composed of a plurality of clusters. The cluster is composed of a predetermined number of sectors as a basic unit of data recording. Sectors are the physical basic units that make up a disk.

If the user determines whether the spare area is allocated during the initialization of the disk, area allocation information on whether the spare area is allocated is recorded in TDDS # 0.

TDDS # 0 is the identifier of the TDDS, the counter information indicating the number of TDDS updates, the location information of the data recording and / or reproducing apparatus information, the location information and the spare area 1 where the temporary defect information is recorded, if any. And size information of the spare area corresponding to the location information of the spare area 2. FIG. As described above, if the user does not want to allocate a spare area because the user does not want defect management by the recording and / or reproducing apparatus, the sizes of the spare area 1 and the spare area 2 are recorded as '0'.

On the other hand, although the detailed configuration of the temporary defect information (TDFL) area is not separately shown, information on defects generated in the data recorded during the recording operation #i and information on the replacement area are recorded in TDFL #i. In addition, in TDFL #i, defect information recorded in previous TDFL # 0, # 1, # 2, ..., # i-1 is not accumulated and recorded, and in the area recorded while the corresponding recording operation #i is performed. Only information about the defect that has occurred is recorded. Accordingly, the recording space can be minimized and the recording space of the temporary defect management area can be used efficiently.

FIG. 4 is a diagram illustrating an embodiment of a space bit map area illustrated in FIG. 2.

The space bit map (SBM) area is composed of a plurality of clusters, and each SBM #i is recorded in one cluster.

Each SBM #i consists of a header area and a bitmap area. The header area includes identifier information of the SBM, counter information indicating the number of updates of the SBM, and a finalization flag. The finalization flag will be described later.

In the bit map area, a bit map representing a cluster in which data is recorded and a cluster in which data is not recorded, with different bit values is recorded in cluster units for the entire area where data can be recorded.

After TDDS # 0 is written, SBM # 0 is written to the first cluster of the space bit map area. The bit corresponding to the first cluster in the temporary defect management information area and the bit corresponding to the position of the first cluster in the space bitmap area are set to '1' and the values for the remaining clusters are recorded as '0'. The bitmap is recorded.                     

As such, by recording the information on the size of the spare area in the TDDS # 0, the recording and / or reproducing apparatus can recognize whether the spare area is allocated and the position or size of the allocated spare area, and record the TDDS # 0. After recording SBM # 0, the recording and / or reproducing apparatus can quickly recognize the area where data is recorded and the area where no data is recorded through the bitmap.

In the embodiment of the present invention shown in FIG. 2, the temporary defect management information area, the temporary defect information area, and the space bit map area are separately formed so that the temporary defect management information, the temporary defect information, and the space bit map information are recorded in separate clusters. It is. However, various modifications for recording the temporary defect management information and the space bit map information are possible.

Fig. 5 is a diagram showing a single recording layer disc capable of data area management according to the second embodiment of the present invention.

In this embodiment, an area for recording the temporary defect management information and the space bit map information together is formed in the lead-in zone.

When the user determines the defect management by the recording and / or reproducing apparatus and instructs the recording and / or reproducing apparatus to allocate a spare area, the recording and / or reproducing apparatus has a spare area in a predetermined size area at the head and the rear of the data area. Allocate 1 and spare area 2.

The recording and / or reproducing apparatus records the area allocation information indicating that the spare area has been allocated to the first cluster of the temporary defect management information and the space bit map area.

FIG. 6 is a diagram illustrating an embodiment of the temporary defect management information and the space bit map area shown in FIG. 5.

The temporary defect management information and the space bit map information are recorded in one cluster, the temporary defect management information includes size information of each spare area corresponding to the area allocation information, and the space bit map information includes a bit map.

The area allocation information is written to the first cluster of the temporary defect management information and the space bitmap area, and then the bit corresponding to the first cluster of the temporary defect management information and the space bit map area is set to '1' and the value for the remaining clusters. Is written as '0'.

Fig. 7 is a diagram showing a single recording layer disc capable of data area management according to the third embodiment of the present invention.

In this embodiment, a temporary defect management area for recording the temporary defect information and the temporary defect management information together in the lead-in zone and an area for recording the disk & drive information and the space bit map information together are formed. Therefore, the temporary defect information and the temporary defect management information are recorded in one cluster, and the disk & drive information and the space bit map information are recorded in one cluster.

As in the other embodiments, when the user determines defect management by the recording and / or reproducing apparatus and instructs the recording and / or reproducing apparatus to allocate a spare area, the recording and / or reproducing apparatus is the head and tail of the data area. Spare Area 1 and Spare Area 2 are allocated to a predetermined size of.

The recording and / or reproducing apparatus records the area allocation information indicating that the spare area has been allocated to the first cluster of the temporary defect management area.

FIG. 8 is a diagram illustrating an embodiment of the temporary defect management area shown in FIG. 7.

The temporary defect management area (TDMA) is composed of clusters in which respective defect management information is recorded. The temporary defect management information (TDDS) and the temporary defect information (TDFL) are recorded in the cluster in which each defect management information is recorded. The temporary defect management information includes size information of each spare area corresponding to the area allocation information.

FIG. 9 is a diagram showing an embodiment of the disk & drive information and space bit map information area shown in FIG.

In each cluster, disk & drive information and space bit map information are recorded. The space bit map information includes a bit map.

After information about the spare area is written to the first cluster in the temporary defect management area, the bit corresponding to the first cluster in the temporary defect management area, and the bit corresponding to the first cluster in the disk & drive information and space bitmap information area. Is set to '1', and the bitmap whose value for the remaining cluster is '0' is recorded in the SBM area of the first cluster of the disk & drive information and space bitmap information area.

Fig. 10 is a diagram showing a single recording layer disc capable of managing the data area according to the fourth embodiment of the present invention.                     

In the present embodiment, unlike the first to third embodiments described above, the temporary defect management area 2 (TDMA2) is further allocated to the data area, and the temporary defect management area 1 (TDMA1) is allocated to the lead-in area.

In the difference between the temporary defect management area 1 and the temporary defect management area 2, the updated information is recorded in the temporary defect management area 1 at least immediately before the disk is ejected from the recording and / or reproducing apparatus or at the time of initialization of the disk, In the temporary defect management area 2, information updated in units of operations is recorded while data is recorded on the disc. Here, the operation unit refers to a unit of "verify-after-write", which is an operation of writing data to a cluster and verifying the data.

If only one temporary defect management area is assigned to the lead-in area, since the temporary defect management area is provided in the lead-in area, there is a limitation on the size of the area, and thus there is a problem that information cannot be updated frequently. Furthermore, if the temporary defect management information is updated at the time of ejecting the disc after data recording to limit the number of updates, the temporary defect management if the power supplied to the recording and / or reproducing apparatus is down by a power failure or the like during data recording. There is a problem that fails to update the information.

Therefore, in order to solve the above-mentioned problem, the temporary defect management area 2 is further allocated to the data area and the temporary defect management area 2 is updated by updating the temporary defect management information to the temporary defect management area 2 on a "verify-after-write" basis. The problem of not updating the information can be prevented, and the disk status information such as the final defect information of the disk and the disk recording status after the disk ejection is recorded in the temporary defect management area 1 and the temporary defect management area 2 so that the information is firmly secured. (robustness) can be increased.

The temporary defect management area 2 is provided in the data area because information is frequently updated and the size of the area becomes large. The temporary defect management area 1, which requires a relatively small area, is provided in lead-in or lead-out.

At the time of initialization of the disc, if the user does not want defect management by the recording and / or reproducing apparatus, or does not want to allocate the temporary defect management area 2 even if he wants to manage the defect by the recording and / or reproducing apparatus, the temporary defect The management area 2 is not allocated to the data area and area allocation information indicating that the temporary defect management area 2 is not allocated to the data area is recorded in the temporary defect management area 1.

FIG. 11 is a diagram illustrating an embodiment of the temporary defect management area 1 shown in FIG. 10. Referring to Fig. 11, temporary defect management area 1 of this embodiment is recorded with temporary defect information, temporary defect management information, and a space bit map. More specifically, the temporary defect management information and the space bit map are recorded together in one cluster TDDS + SBM #k (k is an integer of 0 or more), and the temporary defect information is recorded in another cluster. The temporary defect management area 2 also has the same structure as the temporary defect management area 1.

FIG. 12 is a diagram illustrating a detailed configuration of TDDS + SBM #k which is a cluster in which the temporary defect management information and the space bit map shown in FIG. 11 are recorded together.

Referring to FIG. 12, temporary defect management information of cluster TDDS + SBM #k includes location information capable of recording condition test, location information of drive information, location information of temporary defect information, location information of spare area 1 and spare area 2, The position information of the temporary defect area 2, the position information of the TDDS + SBM for the other recording layer, the position information of the TDDS + SBM of the other temporary defect management area, and the like.

The location information of the spare area 1 and the spare area 2 and the location information of the temporary defect management area 2 need only be size information when the start address or the last address of each area is determined on the disk. If not, the location information is indicated by the start address and the last address of each area.

If the disc has at least two recording layers, a space bit map is created and recorded for each recording layer.

FIG. 13 is a diagram showing the detailed configuration of TDDS + SBM # 0 in which initialization information is recorded when the disc is initialized.

When spare areas 1 and 2 and temporary defect management area 2 are allocated to the data area, size information of each area corresponding to the initialization information is recorded. Recording only size information means that at least the start address or the end address of each area is fixed.

On the other hand, even after allocating a spare area or the like to the data area of the disc and recording the area allocation information to initialize the disc, the structure of the data area can be changed by reinitializing the disc to update the area allocation information.

Fig. 14 is a diagram showing a detailed configuration of TDDS + SBM # n + 1 in which reinitialization information of a disc is recorded.                     

Referring to Fig. 14, information on the changed sizes of the spare areas 1 and 2 and the temporary defect management area 2 is recorded in the temporary defect management information area.

For example, each area is provided in the data area in the order of the spare area 1, the temporary defect management area 2, the user data area, and the spare area 2, and the spare area 2 is written in a small cluster direction in a cluster having a large address. The disk is reinitialized to flexibly use the recording area existing between the cluster of the largest address of the user data area and the cluster of the smallest address of spare area 2.

That is, the disk is reinitialized to increase or decrease the size of the spare area 2 to effectively use the recording area existing between the cluster of the largest address of the user data area and the cluster of the smallest address of the spare area 2.

The reinitialization information of the disc is recorded in at least one TDDS + SBM cluster belonging to the temporary defect management area 1 or the temporary defect management area 2.

Hereinafter, the space bit map corresponding to the data recording area information will be described in more detail.

15 illustrates a space bit map area according to an embodiment of the present invention.

Referring to Fig. 15, a space bit map corresponding to data recording area information is recorded from SBM # 0 to SBM #n. In this embodiment, SBM #i (an integer from i = 0 to n) is recorded in one cluster. However, as shown in Figs. 6 and 9, it may be recorded together with other information in one cluster.

Each SBM #i (an integer from i = 0 to n) contains the entire head and disk information including identifier information (SBM #i), finalization flag information, and update counters identifying each SBM. It includes Bit Map #i (an integer from i = 0 to n), which is bit map information indicating whether data is recorded in a cluster unit which is a data recording unit for the recording area.

When data is recorded on the disc and variation occurs in the data recording area information, SBM #i containing new bit map information indicating the data recording area must be generated and recorded. When a new SBM #i is generated and recorded, an update counter indicates an update count of data recording area information.

When to create and update each SBM #i may vary depending on the program embedded in the individual recording and / or reproducing apparatus. However, after recording the data on the disc, at least once before the eject from the recording and / or reproducing apparatus, a new SBM #i must be generated and recorded.

The finalization flag is a flag indicating whether or not the disc is finalized.

16 illustrates a finalized space bit map area according to an embodiment of the present invention.

Before finalization, the finalization flag value of the head portion of the SBM is set to "0" and recorded together with other information. Referring to Fig. 11, the SBM recorded before finalization is SBM #n. When a finalization command is issued to the recording and / or reproducing apparatus from a host such as a computer, only the value of the finalization flag in the information of the finally updated SBM #n is changed from "0" to "1", and again SBM #n Mark the disc to be finalized.

Further, if necessary, SBM #n having the finalization flag " 1 " is recorded in the next area where predetermined data, for example, data such as " ffh " prevent.

According to the information of the SBM whose finalization flag is "1", the user can save the recording state of the disc at the time of finalization. That is, even if any data is changed or added to the disk after finalization, it is possible to check whether only data recorded in a certain area is recorded at the time of finalization by Bit Map information included in the SBM having the finalization flag of "1". It can be seen that data recorded in other areas is added after the finalization.

On the other hand, the area for recording each SBM #i, which is data recording area information, is preferably located in at least one of the data area, lead-in area or lead-out area shown in FIG.

In the embodiment of the present invention described above, the case where the spare area and the temporary defect management area are allocated to the data area has been described, but the present invention is not limited thereto. That is, the area that can be allocated to the data area may include various information areas, such as the temporary defect information area and the temporary defect management information area, in addition to the spare area and the temporary defect management area described above. Anyone with a can think of a variety of information areas.

Also, in the above-described embodiment of the present invention, the case where the temporary defect management information area and the space bit map area are disposed in the lead-in area has been described. However, the present invention is not limited thereto, and the temporary defect management information area and the space bit map area may be disposed in other areas, for example, the data area or the lead-out area. It is possible.

Although not shown separately, the temporary defect information (TDFL) area may be disposed in the data area. In this case, when the user wants defect management by the data recording and / or reproducing apparatus, the user allocates the spare area 1, the spare area 2 and the TDFL area, and then assigns the TDDS and space bit map information in the manner described above. Record it. The TDFL can be located anywhere between the lead-in area and the spare area 1, between the spare area 1 and the user data area, in the middle of the user data area, between the user data area and the spare area 2, between the spare area 2 and the lead-out area. have.

 On the other hand, if the defect management is not desired by the data recording and / or reproducing apparatus, the spare area is not required, but the user wants to record data in real time using the defect status information of the disc by scanning the entire disc. Since the disk defect status information by scanning must be recorded in the temporary defect information (TDFL) area, the temporary defect information area must be allocated when the disk is initialized.

 The embodiment of the present invention described above has been described taking the case of a disc having one recording layer. Although not shown separately for a disc having two or more recording layers, the spare area management and the bitmap recording process may be performed in the same manner as described above.

On the other hand, in the case of the Write Once disk according to the present embodiment, a temporary defect management area is provided for defect management. However, since a rewritable disc has only a defect management area and no temporary defect management area, rewritable discs may have compatibility problems in order to record or play a write once disc in a rewritable disc recording / reproducing apparatus. To solve the compatibility problem, write once the temporary defect information recorded in the temporary defect management area before the finalization of the disk.

17 is a block diagram of a data recording apparatus according to an embodiment of the present invention. The recording apparatus according to the embodiment shown in FIG. 17 includes a recording / reading section 1, a control section 2, and a memory section 3.

The recording / reading section 1 records data on the recording disc 100 once according to the present invention under the control of the control section 2, and reads out data to verify the recorded data.

The control unit 2 performs data area management of the recording disc 100 once according to the present invention. In addition, the control unit 2 performs a "verify after write method" in which data is recorded once in a predetermined unit on the recording disk 100 and then the recorded data is verified to find out a portion where a defect has occurred. The control unit 2 records the user data in predetermined units and then verifies where the defective area occurs. The control unit 2 generates the temporary defect information TDFL and the temporary defect management information TDDS indicating the defect area found as a result of the inspection. The control unit 2 temporarily stores the generated temporary defect information TDFL and the temporary defect management information TDDS in the memory unit 3, collects a predetermined amount, and temporarily stores the temporary defect management area TDMA provided in the recording disk 100 once. It records in a predetermined area of the back.

The recording disc 100 once is a disc according to various embodiments of the present invention as described above.

When the user determines the defect management by the recording apparatus and instructs the drive to allocate a spare area, the recording apparatus has a spare area 1, a spare area 2 at a predetermined position of the data area, for example, a predetermined size area of the head and tail of the data area. Assign each one.

The recording apparatus records area allocation information, which is information indicating that the spare area has been allocated, in the first cluster of the temporary defect management information area. The area allocation information may be, for example, the size of the allocated spare area. When the start address or the last address of the spare area is determined, for example, when spare area 1 is located at the head of the data area and spare area 2 is located at the rear of the data area, the recording device is assigned a spare area only by the size information of the spare area. Of course, the position and size of the spare area can be recognized.

However, when the start address or the last address of the spare area is not determined, it is preferable to record the start address and the last address of the spare area, or record the start address or the last address of the spare area and the size information of the spare area.

A data area management method according to the present invention will be described based on the structure of the recording apparatus according to the embodiment shown in FIG.                     

18 is a flowchart illustrating a data area management method according to an embodiment of the present invention.

Once recording of the user data on the recording disk 100 for the first time, the recording disk 100 is initialized once. Once the initialization of the recording disc 100 starts according to the user's command (step 110), whether or not at least one area for defect management is allocated to the data area of the recording disc 100 once from a host device such as a computer. A related command is input to the control unit 2 of the recording apparatus (step 120). As described above, it will be appreciated by those skilled in the art that the data area may be allocated various areas for defect management, such as a spare area or a temporary defect management area (TDMA). . In addition, the recording device itself, not the host device, may determine whether to allocate at least one area for defect management to the data area of the recording disc 100 once.

The control unit 2 controls the recording / reading unit 1 to record area allocation information indicating whether an area for defect management has been allocated to the data area once in a predetermined area of the recording disc 100 (step 130). ). The area allocation information may be, for example, the size of the area for defect management assigned to the data area. If the start position of the first spare area is the start position of the data area and the last position of the second spare area is predetermined as the last position of the data area, as shown in FIG. The size information alone may not only recognize that the spare area is allocated, but also recognize the location and size of the spare area.                     

If the user decides not to perform defect management by the recording apparatus, and does not allocate an area for defect management such as a spare area to the data area, the area allocation information of the spare area or the like is set to '0' in the predetermined area. Record it.

The area allocation information can be recorded once in the temporary defect management information area provided in at least one of the lead-in area, data area and lead-out area provided in the recording disc 100. In addition, the temporary defect management information can be recorded in various areas, as shown in FIGS. 3, 6, 8, and 12. FIG.

When the initialization process for the use of the recording disk 100 is finished by recording the area allocation information on the recording disk 100 once according to step 130, the recording apparatus writes the user data to the recording disk 100 once and defects. Management can be performed.

The recording apparatus records the user data once in the user data area of the recording disk 100 and performs defect management by using the spare area and the temporary defect management area (TDMA) or the like (step 140).

On the other hand, even after the recording disk 100 is initialized once, the structure of the data area of the recording disk 100 can be changed by performing the re-initialization process of the recording disk 100 once.

 Once the re-initialization of the recording disc 100 starts according to the user's command (step 150), an area allocation command for newly defining the structure of the data area of the recording disc 100 from the host device is executed by the control unit of the recording device ( 2) is entered.

The control unit 2 controls the recording / reading unit 1 to record new area allocation information in a predetermined area of the recording disc 100 once the previous area allocation information has been recorded, according to a new area allocation command. The information is updated (step 160).

On the other hand, although not separately shown in Fig. 18, data recording area information indicating the area where data is recorded is recorded on the recording disc 100 once. As described above, the data recording area information includes space bit map information.

The head information of the space bit map includes a finalization flag indicating whether data can be additionally recorded on the disk. According to the bitmap information corresponding to the case where the finalization flag information is "1", it is possible to confirm that the recording state of the disc has changed, and to grasp the data recorded on the original disc before changing the recording state of the disc.

On the other hand, if the user does not want defect management by the recording apparatus, no information will be recorded in the defect management area (DMA), so that the area allocation information recorded in the temporary defect management area may be transferred to the defect management area before finalizing the disc. Record it.

Since the temporary defect management information area does not exist in the rewritable disc, the write once disc in which the area allocation information is recorded in the temporary defect management area cannot be reproduced by the reproducing apparatus of the rewritable disc. Therefore, the information once recorded in the temporary defect management area at the time of finalizing the write once disk is recorded in the defect management area to solve the compatibility problem.

Therefore, in the case where the defect management by the drive is not performed, by recording the area allocation information recorded in the temporary defect management area into the defect management area before finalizing the disc, the write once disc can be reproduced even by the reproducing apparatus of the rewritable disc. do.

On the other hand, although not shown in a separate drawing, the reproducing apparatus of the recording disc 100 in which the area allocation information is recorded according to the present invention has a structure similar to that of the recording apparatus shown in FIG. However, since it is a reproducing apparatus, it includes a reading section capable of reading data only instead of the recording / reading section 1 for recording and reading data. In the playback apparatus according to the present invention, if the recording disc 100 is loaded once the area allocation information is recorded according to the present invention, the playback apparatus is a predetermined area, for example, a temporary defect, in which the finally updated area allocation information is recorded according to the present invention. The management area (TDMA) is accessed to obtain finally updated area allocation information. The reproducing apparatus obtains the positional information of at least one area for defect management once allocated to the data area of the recording disc 100 from the finally updated area allocation information. As described above, areas allocated to the data area for defect management include a TDMA and a spare area. The reproduction apparatus can completely grasp the structure of the data area from the area allocation information, and can read not only user data but also data concerning defect management recorded in the TDMA and spare areas assigned to the data area. Furthermore, those skilled in the art to which the present invention pertains operate the playback apparatus according to the present invention from the description of the recording disk 100 and the recording apparatus once recorded with the area allocation information according to the present invention. It will be easy to see.                     

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, user data such as a spare area for defect management by recording the area allocation information relating to the structure of the data area on a recording disc so that the disc drive can recognize the structure of the data area. Areas other than the area for recording the data can be allocated within the data area, thereby improving the utilization of the disk.

In addition, even after initializing the disk, the structure of the data area can be changed by updating the changed area allocation information through the disk reinitialization.

In addition, by recording bitmap information indicating a data recording area in a predetermined area of the disc, the disc drive enables quick access to a desired area, and it is possible to confirm a change in the state of the disc due to additional data recording on the disc. You can check the data recorded on the original disk before changing the status of the disk.

Claims (61)

A write once disc comprising a lead-in area, a data area and a lead-out area, comprising: And a predetermined area for recording area allocation information indicating whether at least one area for defect management has been allocated to the data area. According to claim 1, And the area allocation information includes information indicating the size of an area allocated to the data area. According to claim 1, And an area allocated to the data area for defect management comprises at least one of a spare area, a temporary defect management information area, a temporary defect information area and a temporary defect management area. According to claim 1, A space bit map information area for recording data recording area information, And the data recording area information includes head information and a bit map indicating an area in which data is recorded. The method of claim 4, wherein And when the area allocation information is recorded in a predetermined cluster of the predetermined area, bits of the bit map corresponding to the predetermined cluster are recorded with a predetermined value indicating that the data is a cluster in which data is recorded. The method of claim 4, wherein And the head information includes a finalization flag indicating whether data can be additionally recorded on the disc. According to claim 1, And a predetermined area for recording the area allocation information is a temporary defect management information area. The method of claim 7, wherein And a defect management area for copying and rewriting the area allocation information recorded in the temporary defect management information area if the area for defect management is not allocated to the data area. According to claim 1, A first temporary defect management area in the lead-in area, A second temporary defect management area in the data area, The area allocation information is information indicating that the second temporary defect management area is allocated to the data area, And the predetermined area for recording the area allocation information is one of the first temporary defect management area and the second temporary defect management area. The method of claim 9, The first temporary defect management area is an area for recording updated temporary defect management information at least once immediately before the disc is ejected from the disk drive, And the second temporary defect management area is an area for recording temporary defect management information updated in a predetermined operation unit for recording data. According to claim 1, And the area allocation information is recorded in at least one cluster of the predetermined area, and updated information of the area allocation information is further recorded in another at least one cluster. Receiving a command regarding whether to allocate at least one area for defect management to a data area of a write once disk; And And recording area allocation information indicating whether or not the area for defect management has been allocated to the data area in a predetermined area of the recording disk in accordance with the command. The method of claim 12, And the area allocation information includes information about a size of an area allocated to the data area. The method of claim 12, The area allocation information recording step is a step of recording the area allocation information in a temporary defect management information area provided in at least one of a lead-in area, a data area and a lead-out area provided in the recording disc once. How to manage data areas on disk. The method of claim 12, Recording data recording area information into a predetermined area of the recording disc once; And the data recording area information includes a bit map indicating a head information and an area in which data is recorded. 16. The data recording area information recording step according to claim 15, wherein: And recording a bit value of the bit map corresponding to the predetermined area in which information indicating whether the at least one area is allocated for the defect management is recorded as a predetermined value indicating that the data is a recorded area. To manage the data area of a disk. The method of claim 15, And the head information includes a finalization flag indicating whether additional data can be recorded on the recording disc once. The method of claim 13, The area allocation information recording step, And when the area for defect management is not allocated to the data area, recording area allocation information indicating that the size of the area for defect management is substantially " 0 ". . The method of claim 12, And recording area allocation information recorded in the temporary defect management area in a defect management area. The method of claim 12, And the area allocated to the data area for defect management is at least one of a spare area, a temporary defect management information area, a temporary defect information area, and a temporary defect management area. The method of claim 12, In the recording area allocation information, the first temporary defect management area or the second temporary defect management area provided in the lead-in area of the recording disc once, the area allocation information indicating that a second temporary defect management area has been allocated to the data area. And writing to one of the data area management methods of the disc. The method of claim 21, The first temporary defect management area is an area for recording updated temporary defect management information at least once immediately before the recording disc is ejected from the disk drive, And the second temporary defect management area is an area for recording temporary defect management information updated in a predetermined operation unit for recording data. The method of claim 12, According to the size change command of the at least one area for defect management assigned to the data area, area allocation information including changed size information of at least one area for the defect management is recorded in the predetermined area, and And updating the area allocation information. The method of claim 14, And the area allocation information recording step is a step of recording the area allocation information in at least one cluster from a start position of the temporary defect management information area. delete delete delete delete delete delete delete delete delete delete delete delete delete Accessing a predetermined area of the write once disk to obtain area allocation information; And And obtaining, from the area allocation information, position information of at least one area for defect management allocated to the data area of the recording disc once. The method of claim 38, wherein And the area allocation information includes information about a size of an area allocated to the data area. The method of claim 38, wherein And the predetermined area in which the area allocation information is recorded is a temporary defect management information area provided in at least one of a lead-in area, a data area, and a lead-out area provided on the recording disc once. The method of claim 38, wherein And the area allocated to the data area for defect management is at least one of a spare area, a temporary defect management information area, a temporary defect information area, and a temporary defect management area. delete delete delete delete A write once disc comprising at least one recording layer, At least one data area for recording user data; And And at least one predetermined area for recording area allocation information indicating whether at least one area for defect management has been allocated to the at least one data area. 47. The method of claim 46 wherein And the area allocation information includes information indicating the size of an area allocated to the data area. 47. The method of claim 46 wherein And an area allocated to the data area for defect management is at least one of a spare area, a temporary defect management information area, a temporary defect information area, and a temporary defect management area. 47. The method of claim 46 wherein And when the area for defect management is not allocated to the data area, the area allocation information is information indicating that the size of the area not allocated to the data area is substantially " 0 ". In the recording medium, A first area having a first size for storing defect management information; A second area adjacent to the first area, the second area having a second size used for recording user data; And a third area having a third size for storing data for replacing a defect unit detected in the second area based on the defect management information. 51. The method of claim 50, And the first area is at least one of a lead-in area and a lead-out area on the recording medium. 51. The method of claim 50, And second and third sizes of respective corresponding areas of the recording medium are changed by reinitializing the recording medium to update the respective sizes. The method of claim 52, wherein And the size of the third area is set to zero to maximize the size of the second area when no defect management is performed. 51. The method of claim 50, And the recording medium is a write-once optical disc. The method of claim 54, And the first area is at least one of a lead-in area and a lead-out area on the write-once optical disc. The method of claim 55, And the first area is divided into a plurality of defect management areas located adjacent to each other. The method of claim 56, wherein And second and third sizes of respective corresponding areas of the write once optical disc are changed by reinitializing the write once optical disc to update respective sizes. The method of claim 57, And the size of the third area is set to zero to maximize the size of the second area when no defect management is performed. The method of claim 56, wherein And at least one of the plurality of defect management areas is a space bit map area representing bitmap information corresponding to a data recordable area, and the recording / reproducing apparatus can quickly access a desired area. The method of claim 38, The portion allocated to the data area for disc defect management includes a spare area, a temporary disc defect structure area, a temporary defect list area, or a temporary defect management area. And a data reproducing method. The method of claim 38, The disk further includes a first temporary defect management area formed in the lead-in area and a second temporary defect management area formed in the data area, The area allocation information indicates the allocation of the second temporary defect management area to the data area, and the predetermined area in which the area allocation information is recorded is one of the first and second temporary defect management areas. How to play data.

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