KR100953633B1 - Method for managing a defect area on high density optical disc write once - Google Patents

Abstract

The present invention relates to a method for managing a defect area of a write once high density optical disc, and replaces data of a defect area existing on a high density optical disc such as a write once Blu-ray disc (BD-WO) with a spare area. In addition to recording, defect management information such as disc definition structure (DDS) information and defect list (DFL) information for accessing the data alternately recorded in the spare area is generated and recorded in the defect management area (DMA). The defect management area is allocated to a specific recording section in the data area, and the recording size of the defect management area is extended according to the update of defect management information such as the disc definition structure information and the defect list information. This allows more efficient allocation and expansion of defect management areas for high density optical discs, such as write once Blu-ray discs. Very useful inventions that are able to use.

Blu-ray Disc (BD-WO) recordable once, defect management area, defect management information, disc definition structure information, defect list information, user data area, logical sector number

Description

Method for managing a defect area on high density optical disc write once}             

1 schematically shows a configuration of a general optical disk device,

FIG. 2 illustrates a defect area management method of a general rewritable Blu-ray Disc (BD-RE).

3 illustrates an embodiment in which the defect management area of a write once Blu-ray Disc (BD-WO) to which the present invention is applied is extended.

4 shows another embodiment in which the defect management area of a write once Blu-ray Disc (BD-WO) to which the present invention is applied is extended.

FIG. 5 illustrates an embodiment in which the defect management area of a write once dual layer Blu-ray disc (BD-WO) to which the present invention is applied is extended.

FIG. 6 illustrates another embodiment in which the defect management area of a write once type dual layer Blu-ray Disc (BD-WO) to which the present invention is applied is extended.

7 shows an embodiment of disc definition structure information recorded and managed according to the present invention.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup

12: VDR system 13: encoder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defect area management method for a write once high density optical disc such as a write once Blu-ray Disc Write Once (BD-WO).

Recently, new high-density optical discs, such as rewritable Blu-ray discs (BD-REs), which can record and store high-quality video data and high-quality audio data for a long time, are expected to be developed and released.

On the other hand, an optical disc apparatus for recording or reproducing data on the BD-RE includes an optical pickup 11 for recording or reproducing a signal on the optical disc 10, as shown in FIG. A VDR (Video Disc Recorder) system (12) for processing a signal read out from the optical pickup (11), or modulating and signal processing a data stream input from the outside into a recording signal suitable for recording; The encoder 13 may be configured to encode an analog signal input from the outside and output the same to the VDR system.

In addition, as shown in FIG. 2, a lead-in area (LIA: lead-in area), a data area (Data Area), and a lead-out area (LOA: lead-out area) are separately allocated to the BD-RE. In addition, an inner spare area (ISA) and an outer spare area (OSA) are separately allocated to the front and rear ends of the data area, and a logical sector number (LSN) is interposed therebetween. Is assigned to a user data area (User Data Area).

The lead-in area LIA includes a defect management area (DMA) area, and the DMA area includes a disc definition structure (DDS) for managing the defect area. Information and defect list (DFL) information are recorded and managed, and the DDS information includes the last logical sector number (Last LSN) of the user data area.

Meanwhile, in the VDR system 12 of the optical disk device, after encoding and modulating external input data into a recording signal suitable for recording, a cluster corresponding to an ECC block unit having a predetermined recording size is provided. In this case, as shown in FIG. 2, if a defect area exists in the data area while data is being recorded, cluster data recorded in the defect area is recorded in the spare area. A series of replacement recording operations for performing replacement recording is performed.

Then, defect list (DFL) information for accessing the data alternatively recorded in the spare area is recorded and managed. The defect list information has a predetermined recording size, for example, a fixed recording size of 4 clusters. And a plurality of defect entries (Defect_Entry # 1 to #n) in which the recording position information for the defect area and the recording position information of the data alternately recorded in the spare area are recorded together.                         

Therefore, in the VDR system 12 of the optical disk device, even when a defect area exists in the data area of the BD-RE, after cluster data is recorded in the spare area after cluster data is recorded in the spare area. And generating and recording the defect list information, and reading and reproducing the data recorded in the spare area by referring to the defect list information to perform data recording error in advance. do.

Meanwhile, in recent years, the development of the BD-RE and the standardization of a write once high density optical disc such as a write once Blu-ray disc (BD-WO) have been discussed among related companies. Since there is no optimal defect area management plan, there is an urgent need to develop a solution.

Accordingly, the present invention was created in view of the above circumstances, and is intended to more efficiently manage the defect area of a write once high density optical disc such as a write once Blu-ray disc (BD-WO). SUMMARY OF THE INVENTION An object of the present invention is to provide a defect area management method for a write once high density optical disc.

In order to achieve the above object, the defect area management method for a write once high density optical disc according to the present invention includes the defect management information in the defect management area allocated after the user data area to which a logical sector number is assigned. In addition to recording, the recording size of the defect management area is extended according to the update of the defect management information, and the logical sector number of the user data area is updated and recorded in the defect management information.

In addition, the defect area management method for a write once high density optical disc according to the present invention allocates a defect management area to a user data area given a logical sector number, records defect management information, and records the user. Wherein the logical sector number of the data area is updated and recorded in the defect management information.

In addition, the write once high-density optical disc according to the present invention has a defect management area assigned after a user data area given a logical sector number, and at least one defect management information is stored in the defect management area. And the last logical sector number of the user data area is recorded in the defect management information.

In addition, in the write-once high density optical disc according to the present invention, the first defect management area and the second defect management area are allocated after the user data areas of the first and second layers to which logical sector numbers are assigned. In addition, at least one defect management information is recorded in the first defect management area and the second defect management area, and the last logical sector number and the second logical sector number of the first user data area are recorded in the defect management information. And the last logical sector number of the user data area is recorded.

Hereinafter, a preferred embodiment of a defect area management method of a write once high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

First, the defect area management method of a write once high density optical disc according to the present invention is applicable to a write once Blu-ray disc (BD-WO), as shown in FIG. The lead-in area LIA, the data area, and the lead-out area are separately allocated, and the data area is simultaneously assigned a physical sector number PSN and a logical sector number LSN. It may be divided into a user data area and a non-user data area to which only a physical sector number PSN is assigned.

Meanwhile, an inner spare area ISA and an outer spare area OSA for alternately recording data of a defect area may be allocated to the non-user data area, and between the user data area and the outer spare area, a disc may be allocated. A defect management area (DMA) for recording and managing definition structure (DDS) information and defect list (DFL) information can be allocated to a predetermined recording size set in advance.

Further, defect management information recorded in the defect management area, for example, disc definition structure information and defect list information, is updated and recorded in accordance with an alternative recording operation for alternately recording data in the defect area into the spare area. For example, it may be defined as temporary disk definition structure information (TDDS: Temporal DDS), temporary defect list information (TDFL: Temporal DFL), and temporary defect management area (TDMA: Temporal DMA), respectively.

3, the recording size of the TDMA area can be extended and used according to the update recording of the TDDS information and the TDFL information. For example, the recording size of the TDMA area is M errors. It may be extended to a predetermined recording size unit, such as a correction block unit or N sector units, and may also be limited to a preset maximum TDMA size.

For example, as shown in FIG. 3, when recording and managing first TDDS information and first TDFL information in an initially allocated TDMA area, the first logical sector of the user data area is included in the first TDSS information. In the case of newly updating and recording the second TDDS information and the second TDFL information in the initially allocated TDMA area, the last LSN of the user data area is included in the second TDSS information. The same number (Last LSN) is recorded including the same.

On the other hand, when it is no longer possible to record new third TDDS information and third TDFL information in the initially allocated TDMA area, the third TD area may be extended by a predetermined recording size unit and then the third size is allocated. The TDDS information and the third TDFL information are recorded. In this case, the third TDDS information includes the last logical sector number (Last LSN (new)) of the newly changed user data area due to the expansion of the TDMA area. .

Therefore, in the VDR system 12 of the optical disk apparatus constructed as described above with reference to FIG. 1, an alternative recording operation for performing replacement recording of data in the defect area into the spare area is performed, and the replacement recorded data is accessed. And recording and managing TDDS information and TDFL information for management in an initially allocated TDMA area, and then extending the recording size of the TDMA area to record and manage new TDDS information and TDFL information, thereby recording the size of the TDMA area. You will be able to scale up as efficiently as you need.

Meanwhile, the recording size of the outer region may be allocated to N clusters or may be unassigned to zero, and in another embodiment according to the present invention, as shown in FIG. TDMA of a predetermined recording size at the time when TDDS information and TDFL information are not separately allocated to the previous recording position of the outer spare area that may be unassigned to zero or allocated to N clusters, instead. The area is newly assigned to the previous recording position of the outer spare area and recording management is performed.

In this case, the TDDS information includes the last logical sector number (Last LSN) of the newly changed user data area due to the allocation of the TDMA area, and is then recorded. Then, the new TDDS information and the TDMA information are updated and recorded. For example, as shown in FIG. 4, when it is no longer possible to record new third TDDS information and third TDFL information in the allocated TDMA area, the recording size of the TDMA area is extended by a predetermined recording size unit. Done.

The third TDDS information and the third TDFL information are recorded in the extended TDMA area, wherein the third TDDS information includes the last logical sector number of the user data area newly changed due to the expansion of the TDMA area. Last LSN) is recorded.

Meanwhile, as illustrated in FIG. 5, in the case of a BD-WO Dual Layer having a first layer (Layer 0) and a second layer (Layer 1), the lead-in area (LIA) and the first inner are formed in the first layer. The spare area ISA0, the user data area, and the first outer spare area OSA0 are sequentially allocated in the disc circumferential direction, and the second layer includes the lead-out area LOA, the second inner spare area ISA1, and the user. The data area and the second outer spare area OSA1 are sequentially allocated in the disc circumferential direction.

The logical sector numbers assigned to the user data areas of the first layer and the second layer gradually increase from the inner circumference of the first layer and the outer circumference of the second layer as shown in FIG. 5. In this case, between the second inner spare area and the user data area, a TDMA area for recording and managing TDDS information and TDFL information may be previously allocated to a predetermined recording size.

In addition, when recording and managing first TDDS information and first TDFL information in the initially allocated TDMA area, the first TDSS information includes the last logical sector number (Last LSN) of the user data area. In addition, when newly updating and recording second TDDS information and second TDFL information in an initially allocated TDMA area, the second logical data number (Last LSN) of the user data area is equally included in the second TDSS information. Is recorded.

When the third TDDS information and the third TDFL information can no longer be recorded in the initially allocated TDMA area, the first recording size of the TDMA area is extended and allocated by a predetermined recording size unit. The third TDDS information and the third TDFL information are recorded, wherein the third TDDS information includes the last logical sector number (Last LSN (new)) of the newly changed user data area due to the expansion of the TDMA area. do.

Meanwhile, in another embodiment according to the present invention, as shown in FIG. 6, the TDMA0 region of the first layer is allocated between the user data region and the outer spare region OSA of the first layer, and the second layer is allocated. The TDMA1 area of the second layer may be allocated between the inner spare area ISA1 and the user data area.

In the case where the recording size of the TDMA0 area is extended and used, as described above, the TDDS information generated at that time includes the last logical of the user data area of the first layer newly changed due to the expansion of the TDMA0 area. The sector number (Last LSN 0) is recorded.

When the recording size of the TDMA1 area is extended and used, the TDDS information generated at that time includes the last logical sector number (Last LSN) of the user data area of the second layer newly changed due to the expansion of the TDMA1 area. 1) is recorded to include.

Meanwhile, as described above with reference to FIGS. 3 to 6, the recording size of the extended TDMA area may be limited to a preset maximum recording size. In the state where the TDMA area is extended to the maximum recording size, When the TDDS information and the TDFL information can no longer be recorded, the TDDS information updated immediately before the recording includes the TDMA size information and the TDMA full flag as shown in FIG. do.

Then, the last logical sector number of the user data area changed by the TDMA extension is recorded and recorded. For example, when the TDMA area is separately allocated to the first layer and the second layer, as shown in FIG. Likewise, the last logical sector number (Last LSN 0 of User Data Area) of the first layer and the last logical sector number (Last LSN 1 of User Data Area) of the second layer are recorded.

Therefore, the optical disk apparatus can accurately recognize the newly changed user data region due to the expansion of the TDMA region by referring to the last logical sector number of the user data region included in the TDDS information. By using the size information and the TDMA full flag information, the TDMA area is extended or used, or the defect management operation is automatically stopped.

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

According to the present invention, the defect area management method for a write-once optical disc according to the present invention comprises a spare area for data of a defect area existing on a high-density optical disc such as a write once Blu-ray disc (BD-WO). And recording defect management information such as disc definition structure (DDS) information and defect list (DFL) information for accessing the data recorded in the spare area. Record management in the defect management area, and assigning the defect management area to a specific recording section in the data area and updating the defect management information such as the disc definition structure information and the defect list information. By more efficient use, the defect management area of high density optical discs such as Blu-ray discs that can be written once can be allocated more efficiently. And it is a very useful invention that can be extended to use.

Claims (26)

An optical disc comprising a data area assigned with a physical sector number, the data area including a user data area assigned with a logical sector number and a non-user data area assigned with a logical sector number. (a) allocating a defect management area in the non-user data area; And (b) disc definition structure information including information indicating the last logical sector number of the user data area and the size of the assigned defect management area in the assigned defect management area, and the defect area in the optical disc. And recording defect list information. The method of claim 1, Expand the assigned defect management area according to the update of the defect list; Updating and recording the disk definition structure information including the last logical sector number of the user data area changed according to the expansion of the defect management area into the assigned defect management area. How to manage the effect area. The method of claim 1, The optical disc is a single-layer Blu-ray disc that can be written once, and in the step (a), the defect management area is recorded before the outer spare area of the non-user data area or before the lead-out area of the optical disc. And a defect area management method for assigning to a recording position of the optical disc. The method of claim 1, The optical disc is a dual-layer Blu-ray disc that can be written once, and in the step (a), the defect management area is assigned to a recording position after the inner spare area of the second layer of the optical disc. Defect area management method. The method of claim 1, The optical disc is a dual-layer Blu-ray disc that can be written once, and in the step (a), the defect management area includes a recording position after the inner spare area of the second layer of the optical disc, and an outer zone of the first layer. 18. A defect area management method of an optical disc, characterized in that each of them is assigned to a previous recording position. The method according to any one of claims 1 to 5, In the step (a), the defect management area is allocated to a predetermined recording size unit in advance. The method according to any one of claims 1 to 5, In the step (a), the defect management area management method of an optical disc, characterized in that the allocation within the maximum recording size set in advance. The method according to any one of claims 1 to 5, And the disc definition structure information includes a flag indicating whether the allocated defect management area is full. In an optical disc having a data area assigned with a physical sector number, The data area includes a user data area to which a logical sector number is assigned and a non-user data area to which a logical sector number is not assigned. And a defect management area allocated to the non-user data area, wherein the assigned defect management area includes information indicating the last logical sector number of the user data area and the size of the assigned defect management area. And definition structure information and defect list information for a defect area in the optical disc. The method of claim 9, The assigned defect management area is expanded according to the update of the defect list. And the defect management information including the last logical sector number of the user data area changed in accordance with the expansion of the defect management area is updated and recorded in the assigned defect management area. 10. The method of claim 9, The optical disc is a single-layer Blu-ray disc that can be written once, and the defect management area is allocated to a recording position before an outer spare area of the non-user data area or a recording position before a lead-out area of the optical disc. Optical disk. 10. The method of claim 9, And the optical disc is a write-once dual-layer Blu-ray disc, and the defect management area is allocated to a recording position after the inner spare area of the second layer of the optical disc. The method of claim 9, The optical disc is a dual-layer Blu-ray disc that can be written once, and the defect management area is assigned to a recording position after the inner spare area of the second layer of the optical disc and a recording position before the outer zone of the first layer, respectively. An optical disc, characterized in that. The method according to any one of claims 9 to 13, And the defect management area is allocated in units of a predetermined recording size set in advance. The method according to any one of claims 9 to 13, And the defect management area is allocated within a preset maximum recording size. The method according to any one of claims 9 to 13, And the disc definition structure information includes a flag indicating whether the allocated defect management area is full. An optical disc comprising a data area to which a physical sector number is assigned, wherein the data area includes a user data area to which a logical sector number is assigned and a non-user data area to which a logical sector number is not assigned. A pickup configured to record data on the optical disc, wherein the pickup includes a last logical sector number of the user data area and a size of the assigned defect management area in a defect management area allocated to the non-user data area; And disc definition structure information including information indicating the < RTI ID = 0.0 > indicative < / RTI > and defect list information for the defect area in the optical disc. The method of claim 17, The assigned defect management area is extended in accordance with the update of the defect management information, and the pickup is configured to manage the allocated logical sector number of the last logical sector number of the user data area changed according to the expansion of the defect management information. And an update disk in the area. The method of claim 17, The optical disc is a single-layer Blu-ray disc that can be written once, and the defect management area is assigned to a recording position before an outer spare area of the non-user data area or a recording position before a lead-out area of the optical disc. An optical disk device. The method of claim 17, And the optical disc is a write-once dual-layer Blu-ray disc, and the defect management area is allocated to a recording position after the inner spare area of the second layer of the optical disc. The method of claim 17, The optical disc is a dual-layer Blu-ray disc that can be written once, and the defect management area is assigned to a recording position after the inner spare area of the second layer of the optical disc and a recording position before the outer zone of the first layer, respectively. The optical disk device, characterized in that. The method according to any one of claims 17 to 21, The defect management area is allocated in units of a predetermined recording size set in advance. The method according to any one of claims 17 to 21, And the defect management area is allocated within a preset maximum recording size. The method according to any one of claims 17 to 21, And the disc definition structure information includes a flag indicating whether the allocated defect management area is full. delete delete

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