KR20050024552A - Method for recording management information on optical disc write once - Google Patents

Abstract

PURPOSE: A write-once optical disk and a management information recording method of the optical disk are provided to record management information finally recorded within a corresponding TDMA(Temporary Defect Management Area) to a DMA(Defect Management Area) whenever each TDMA is full, thereby easily obtaining final management information. CONSTITUTION: Plural TDMAs are used in specific order. Whenever each TDMA is full, management information finally recorded in a corresponding TDMA is transferred to a DMA to be recorded in the DMA. The transferred management information consists of disk recording state information and TDDS(Temporary Disk Definition Structure) information. The TDMAs can be comprised in 2 to the maximum if one recording layer exists. If two recording layers exist, the TDMAs may be comprised in 5 to the maximum.

Description

Method for recording management information on optical disc write once}

       The present invention relates to an optical disc which can be recorded once and a method of recording management information of the optical disc.

As optical recording media, optical disks capable of recording large amounts of data are widely used. Recently, new high-density optical recording media (HD-DVD), for example, Blu-ray Disc, which can record and store high-quality video data and high-quality audio data for a long time, have been developed.

Blu-ray Disc, the next-generation HD-DVD technology, is a next-generation optical recording solution that can store data that significantly surpasses existing DVDs. Recently, world-standard technical specifications have been established.

Blu-ray Disc, one of the world's standard HD-DVDs, uses a 405nm blue-violet laser, which is much denser than current DVDs that use 650nm red lasers, and has a thickness of 1.2mm and a diameter of 12cm with a 0.1mm light transmission layer. You can store more data on your disc than your current DVD.

Various standard proposals related to Blu-ray Discs have been prepared, and various standard proposals for a write once Blu-ray Disc (BD-WO) have been prepared following the rewritable Blu-ray Disc (BD-RE).

Fig. 1 schematically shows the recording area structure of a rewritable Blu-ray Disc (BD-RE). The Blu-ray disc of Fig. 1 shows the structure of a recording area for a disc having a single recording layer, for example, and a lead-in area and a data area when viewed from the inner circumference of the disc. ), Which is divided into a lead-out area. In the data area, an inner spare area ISA0 and an outer spare area OSA0 for replacing the defective area are provided inside and outside of the data area, respectively. Area) is provided.

If a defective area exists in the user data area while data is being recorded on the rewritable Blu-ray Disc BD-RE, the data recorded in the defective area is moved to the spare area and replaced. Defect management is performed by recording information such as a location related to a defective area and an alternate recorded area, etc., in the defect management area (hereinafter referred to as "DMA") provided in the lead-in / out area as management information on the defective area. Will be performed. In the case of a BD disc, the minimum recording unit recorded on the disc is a cluster, the minimum unit. One cluster is composed of 32 sectors in total, and one sector is composed of 2048 bytes.

In the case of the rewritable disc, since any area of the disc can be rewritten, not only a special recording method can be used, but also the entire area of the disc can be used at random, and the management information can be rewritten in the defect management area (DMA). Only a predetermined size of the defect management area (DMA) may be provided. Therefore, in case of a rewritable Blu-ray disc (BD-RE), 32 clusters are allocated to the defect management areas (DMA1, 2, 3, and 4), respectively. It was.

However, in a disc which can be written once, recording on a specific area of the disc can be performed only once, so that there are many limitations on the recording method, and in a high-density once-writable disc such as the recent BD-WO, data is recorded. The management of defect areas has also become an important issue. Therefore, even in a disc that can be written once, a management area for recording disc management information including defect management information is required. In particular, in the case of an optical disc that can be written once, an area for recording management information by the characteristic of 'one time' of recording is recorded. It would be more necessary than this rewritable disc, but there is no unified standard to accommodate the above requirements, and it can be solved in any of the existing standards related to once-writable optical discs. There is no situation.

Accordingly, the present invention has been made in view of the above circumstances, and it is intended to provide a method for recording disc management information in an optical disc that can be recorded once and an initial reproducing method for a related disc. A plurality of temporary defect management areas (also referred to as " TDMA ") are provided therein, and information indicating the usage status of the plurality of temporary defect management areas (TDMA) is recorded in the defect management area (DMA) in the disc. The purpose is to provide a way to manage.

In order to achieve the above object, a method of recording management information of an optical disc of write once type according to the present invention is characterized in that in a write once type optical disc having a plurality of temporary defect management areas (TDMA) and a defect management area (DMA), A plurality of temporary defect management areas are used in a specific order, and each time the temporary defect management areas become full, the management information recorded last in the temporary defect management area is transferred to the defect management area. ,

Another management information recording method of a write-once optical disc of the present invention, before a disc finalize in a write-once optical disc having a plurality of temporary defect management areas (TDMA) and a defect management area (DMA) Each time the temporary defect management area becomes full, the management information recorded last in the temporary defect management area (TDMA) is transferred to the defect management area (DMA), and when disk finalizes, Characterized in that the last recorded management information in the entire temporary defect management area (TDMA) is transferred to the defect management area (DMA),

An optical disc of write once type according to the present invention includes a plurality of temporary defect management areas (TDMA) and a defect management area (DMA) in a management area, and before the disc finalize in the defect management area (DMA). Each time the temporary defect management area becomes full, the area for recording the last management information in the temporary defect management area previously, and the entire temporary defect management area (DMA) at the time of disk finalization. Characterized in that it comprises an area for recording the last recorded management information,

According to an exemplary embodiment of the present invention, a method of initial reproducing an optical disc capable of recording once includes checking whether an loaded disc is finalized from a defect management area (DMA) in the disc when the optical disc is loaded, and the disc is finalized. If it is not finalized, checking the position of the currently available temporary defect management area (TDMA) from the recording state of the defect management area and reproducing management information necessary for recording and reproducing the disc; and finalizing the disc. And, if necessary, reproducing management information necessary for recording and reproducing the disc in the defect management area.

The recording / reproducing apparatus of the write once optical disc according to the present invention, when the optical disc is loaded, checks the defect management area (DMA), checks whether or not the loaded disc is finalized from the defect management area, A recording / reproducing unit which determines an area to acquire final management information of the loaded disc according to the finalize, reads out and temporarily stores the final management information of the disc from the area, and an optical disc using the management information. And a control unit for transmitting a recording / playback command to the controller.

      Hereinafter, a preferred embodiment of a management information recording method of a write once optical disc according to the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, a case of a write once Blu-ray Disc (BD-WO) will be described as an example.

      In addition, the terms used in the present invention was selected as a general term widely used as possible now, but in certain cases, the term is arbitrarily selected by the applicant, in which case the meaning is described in detail in the description of the invention, The present invention is to be understood as the meaning of terms rather than names.

      2, 3, and 4 are detailed diagrams of a write once optical disc structure and a method of recording management information to which the present invention is applied.

      FIG. 2 is a write once optical disc structure of the present invention, which relates to a single layer disc having one recording layer, and FIG. 3 is a write once optical disc structure of the present invention, which has a dual recording layer having two recording layers. A dual layer disc, comprising a first recording layer (Layer0) and a second recording layer (Layer1), each of which has a management area (Inner Area, Outer Area) in the inner and outer areas. It is provided. 2 and 3, the characteristic optical disk structure of the present invention compared with the prior art is as follows.

Firstly, a number of temporary defect management areas (TDMAs) are provided because a large number of areas for recording various types of management information on the disks must be secured due to the characteristics of an optical disc that can be written once. In particular, TDMA can be classified into two types. First, the primary defect management area (hereinafter referred to as "PTDMA") having a fixed size (for example, 2048 cluster) in the inner area is referred to as each. It is provided in the recording layer, and these are named PTDMA0 and PTDMA1, respectively. Next, an auxiliary temporary defect management area (hereinafter referred to as "ATDMA") is provided in the spare area (OSA0, OSA1, ISA1) having a variable size among the spare areas in the data area in association with the size of the spare area. They are named ATDMA0, ATDMA1, and ATDMA2, respectively. The ATDMA can be made of an selectively assignable structure, and the allocation of the ATDMA size can be variously determined, so that a quarter size of the spare area is appropriate. Therefore, the size of ATDMA0 and ATDMA1 is suitable for P = N * 256/4 cluster, and the size of ATDMA2 is suitable for Q = L * 256/4 cluster. That is, the write once optical disc of the present invention is characterized by including a plurality of TDMAs in addition to DMA.

Secondly, if the DMA is provided and the disc no longer writes, the last management information in the TDMA is transferred to the DMA beforehand (this is generally called finalize), or even before the disc finalize. The information indicating that the TDMA is in use can be recorded in the DMA. That is, the management information will be recorded using TDMA while the write-once disk is in a recordable state, but the DMA will play the role of previously recording management information recorded in the TDMA in a specific case. The reason for using DMA separately in addition to the above is that when the disc is loaded into the recording / reproducing apparatus (Fig. 10), the recording / reproducing apparatus first checks the DMA in the management region. Therefore, it is necessary to first record important management information in the DMA region. There is.

In other words, when a disc is loaded, it is necessary to first determine whether the disc is finalized. If the disc is not finalized, it is necessary to find the final management information recorded in the TDMA and quickly acquire initial management information necessary for disc recording and playback. However, in the present invention, a plurality of (maximum five) TDMAs exist, so that the final management information is recorded in which TDMA will eventually have to search all TDMAs and find them one by one. It takes a lot of time to obtain the management information recorded in the system, which not only burdens the system but also causes inconvenience to the user.

Therefore, the present invention not only indicates whether the disk is finalized in the DMA, but also records which TDMA is valid when not finalized, so that the final management information in the valid TDMA can be easily confirmed.

In order to understand the technical features of the present invention, first of all, the meanings of "management information" and "final management information" used in the present invention will be elucidated through FIGS. 4, 5 and 6.

First, FIG. 4 shows various types of disc management information recorded in TDMA of the present invention, for example. Whenever management information is recorded in TDMA, at least one cluster, which is a minimum recording unit, is recorded, and the management information recorded in TDMA is large. It is classified into three kinds. This is called Temporary Disc Definition Structure (hereinafter also referred to as "TDDS") information, and disc recording status information (these are "T-Info" and "SBM", which will be described later) and Temporary Defect List, respectively. List: hereinafter also referred to as "TDFL". The management information recorded in the TDMA will be described in detail as follows.

For convenience of description, the present specification intends to use "TDMA" as a generic term for PTDMA 0,1 and ATDMA 0,1,2, and unless otherwise specified, the description of the specification corresponding to TDMA is common to all PTDMA and ATDMA. This is to be applied to.

First, the TDDS always records the management information in the last sector every time (updating) the management information in the TDMA. The TDDS is an area containing general management information of a disc, and contains not only information for defect management but also pointer information for designating the location of other management information. 10) is the information to check first. Since the information in the TDDS is continuously updated according to the use state of the disk, the information in the TDDS is always recorded in the last sector every time it is recorded in the management area TDMA. Therefore, only after confirming the final TDDS on the current disk, it is possible to check all the various management information on the current disk usage status.

In addition, the TDFL is a defect management information. When a defective area occurs on a writeable optical disc, a TDFL generates a defect list for managing the defect area, which is combined with the TDDS and recorded in the TDMA (TDFL + TDDS). The defect list is written as one entry for one defect area. If the entry exceeds one cluster, the defect list is written in the next two clusters. Therefore, TDFL + TDDS should be minimized at each recording. It is recorded in more than one cluster. For example, considering the total size of a disc, a single-layer BD-WO disc with one recording layer requires up to four clusters (1 <= N <= 4), and a dual-layer BD- with two recording layers. In the case of a WO disk, up to eight clusters are required (1 <= N <= 8).

The TDMA also records "SBM (Space Bit-Map)" and "T-Info (Track-Information)" as management information indicating the disk recording status. It is very important to find out which area of the disc is recordable or unrecorded in the write-once optical disc. Therefore, the information for managing the data is recorded in one cluster in the TDMA, and TDDS is always recorded in the last sector of the cluster. Record it together (T-Info (or SBM) + TDDS). In particular, the SBM and T-Info are managed as SBM information when the disc is to be used randomly according to the recording mode of the disc, and as T-Info information when the disc is used sequentially. In other words, when the disc is initialized, the recording mode of the disc is determined. In the sequential recording mode, the recording is performed in the form of "T-Info + TDDS". In the random recording mode, the recording mode is "SBM + TDDS". Since the recording mode determined once cannot be changed during the disc use, "T-Info" and "SBM" will not be used at the same time. The "recording mode" information is also recorded in the TDDS. However, the specific structure of the "SBM", "T-Info" is not significantly related to the main technical problem of the present invention, the detailed description will be omitted in this specification, but the patent application filed earlier by the present applicant 2003-33008, patent application 2003-37618, describes this in detail.

5 and 6 show a case in which management information is recorded in the TDMA, in which a specific TDMA is full, and specifically shows what information is " final management information " in the TDMA.

First, in the present invention, as shown in FIG. 2, when there is one recording layer, up to two TDMAs can exist, and the two TDMAs define the order of use as PTDMA0-> ATDMA0. In addition, as shown in FIG. 3, up to five TDMAs can exist, and five TDMAs are defined as PTDMA0-> PTDMA1-> ATDMA0-> ATDMA1-> ATDMA2. The order of use suggests the most preferable order of use in consideration of the mode of use of the disk, but it will be apparent that the order of use may be different in actual application.

FIG. 5 shows a state in which, for example, the first used PTDMA0 of the TDMA is recorded to the end and is full, and there is no area to record. Thus, when a specific TDMA becomes full, the corresponding TDMA is no longer recorded. Since this is impossible, the state of use of the TDMA is recorded in the DMA. In the DMA recording method, " TDDS " and " T-Info (or SBM) " of the final management information in the full PTDMA0 are previously recorded in the DMA. A specific method of transferring to DMA will be described later with reference to FIG. 7.

Fig. 6 shows a state in which, for example, the last (single layer) or the third (dual layer) ATDMA0 used in TDMA is recorded to the end, and there is no more area to write. ), "TDDS" and "T-Info (or SBM)" of the last management information recorded in ATDMA0 are previously recorded in DMA. Compared with FIG. 5, for example, FIG. 5 shows the case where the last recorded management information of PTDMA0 is " TDFL + TDDS ", and FIG. 6 shows the last recorded management information of ATDMA0. The case of "T-Info (or SBM) + TDDS" is shown. Especially in the case of single layer, ATDMA0 is the last TDMA, so if ATDMA0 is full, this means that there is no more management area and the disk will be finalized automatically.

Hereinafter, a method of recording management information in the DMA, particularly before the disc is finalized and at the time of finalization, will be described. Particularly, when the management information is recorded in the DMA before finalization, the specific TDMA is full. (Full) to be the case where the last management information in the TDMA is transferred to the DMA.

First, the disc finalization will be described. In the case of a disc which can be written once, when the disc is no longer written to the disc, the disc is finalized and managed. Therefore, in the case of finalizing, the recording / playback apparatus (FIG. 10) does not physically leave the user data area to be recorded on the disk anymore, or if all the areas of TDMA recording management information become full. The disk is automatically finalized, and the disk is finalized by the finalization command if desired by the user even if the above is not the case.

7 shows a method of recording management information in the DMA in the case of a single-layer BD-WO.

In Fig. 7, four DMAs (DMA1, 2, 3, 4) exist in a single-layer BD-WO disk, and the same contents are recorded in the same structure in each DMA, and each DMA is composed of 32 clusters in total. It is. The DMA recording structure records "DDS (Disc Definiton Structure)" and "T-Info (or SBM)" in the first four clusters (clusters 1, 2, 3, and 4), and "DFL (Defect List) in the remaining 28 clusters. ) Is configured to repeat recording four times in four clusters, which is to maintain compatibility with the BD-RE.

Specifically. The DDS area in the DMA is an area where TDDS information of TDMA is previously recorded, and the DFL area in the DMA is an area where TDFL information of TDMA is previously recorded.

In the recording of the first four clusters in the DMA, if the PTDMA0 area becomes full before finalization, it is recorded in the first cluster (cluster 1) in the DMA, and the "final TDDS" information of the management information in the PTDMA0 area is stored in the DDS area. Is recorded before, and " final T-Info (or SBM) " information is previously recorded in the T-Info (or SBM) area. For example, the final management information of the hatched portion in Fig. 5 becomes the information previously recorded. Accordingly, in this state, the recording / reproducing apparatus (Fig. 10) can know that the current disc is an area where PTDMA0 is not available, and that the next ATDMA0 should be used as an area for updating management information.

If the disc is finalized while recording continues in this state, the last management information recorded in the TDMA is transferred to the DMA in the remaining areas of the DMA, and the final " TDDS ", " T-Info (or SBM) " , "TDFL" are all recorded in DMA, and the final "TDDS" and "T-Info (or SBM)" are each one 3 clusters (3 clusters 2, 3, 4) among the first 4 clusters in DMA. The TDFL is repeatedly recorded seven times, and the TDFL is repeatedly recorded seven times by four clusters in the remaining 28 clusters in the DMA.

Therefore, when the disc is loaded, the recording / reproducing apparatus (Fig. 10) can know whether the disc currently loaded is the finalized disc from the recording state in the DMA, and if the disc is not finalized, the currently available TDMA area is displayed. You will know where it is. The reason for the above-mentioned confirmation is to know the final management information recorded in the currently loaded disc for recording or reproduction at the beginning of the disc, so that it is possible to quickly determine in which area the final management information is obtained. If finalized, the final management information can be obtained from the information recorded in the DMA, and if not finalized, the final management information can be obtained from the currently valid TDMA. Also, the final management information previously recorded in the DMA before finalization can be used as information that can be restored so that the management information is lost in the TDMA.

FIG. 8 is a diagram illustrating a case where the present invention is applied to the dual-layer BD-WO of the present invention. In particular, the structure of the DMA is illustrated in detail. That is, the dual layer has two recording layers (Layer 0, 1), and each recording layer has four DMAs (DMA1, 2, 3, 4), respectively. At this time, DMAs having the same code for each recording layer are treated as one DMA and recorded.

In FIG. 8, the thick dotted line indicates the direction in which each DMA is recorded, and since each DMA for each recording layer is composed of 32 clusters as in a single layer, two DMAs having the same reference numeral in the case of a dual layer are one complete DMA. Therefore, it can be seen that each DMA consists of a total of 64 clusters. That is, DMA1 (Layer0) + DMA1 (Layer1) = DMA1 (Dual Layer).

FIG. 9 shows a method of recording management information in a DMA in the dual-layer BD-WO as shown in FIG.

In Fig. 9, the four DMAs (DMA1, 2, 3, 4) existing in the dual-layer disc are all recorded in the same structure, and each DMA is composed of 64 clusters in total. "DDS (Disc Definiton Structure)" and "T-Info (or SBM)" were recorded in the cluster, and the remaining 56 clusters were configured to repeat "DFL (Defect List)" seven times in eight clusters. This is to maintain compatibility with the BD-RE case as in the single layer of FIG. In particular, the first 8 clusters are divided into the areas recorded before finalization (4 clusters) and the areas recorded after finalization (4 clusters), and before each finalization, each TDMA becomes a full TDMA. The final management information in the previous record.

In the recording of the first four clusters in the DMA, if the PTDMA0 area becomes full before finalization, it is recorded in the first cluster (cluster 1) in the DMA, and the "final TDDS" information of the management information in the PTDMA0 area is stored in the DDS area. Is recorded before, and " final T-Info (or SBM) " information is previously recorded in the T-Info (or SBM) area. For example, the hatched final management information in Fig. 5 becomes the information previously recorded. Accordingly, in this state, PTDMA0 means an unusable area, and it can be seen that PTDMA1 is used as an area for updating management information next time.

Similarly, when the PTDMA1 area used in the next order (second) becomes full, it is recorded in the second cluster (cluster 2) in the DMA, and the "final TDDS" information of the management information in the PTDMA1 area is previously recorded in the DDS area. , "Final T-Info (or SBM)" information is previously recorded in the T-Info (or SBM) area. In addition, when the ATDMA0 area used in the next order (the third) becomes full, it is recorded in the third cluster (cluster 3) in the DMA, and "final TDDS" information of the management information in the ATDMA0 area is previously recorded in the DDS area. , "Final T-Info (or SBM)" information is previously recorded in the T-Info (or SBM) area. Also, if the ATDMA1 area used in the next order (fourth) becomes full, it is recorded in the fourth cluster (cluster 4) in the DMA, and "final TDDS" information of the management information in the ATDMA1 area is previously recorded in the DDS area. , "Final T-Info (or SBM)" information is previously recorded in the T-Info (or SBM) area. Also, if the ATDMA2 area used as the last order (the fifth) becomes full, this means that there is no longer an area for recording management information, so the disk is automatically finalized, and all the remaining clusters in the DMA are automatically finalized. Although the "final TDDS" information of the management information in the entire TDMA is previously recorded in the DDS area, the "final T-Info (or SBM)" information is previously recorded in the area such as T-Info (or SBM), and "final" TDFL "information is previously recorded in the" DFL "area.

If the disk is recorded as described above in the first four clusters (clusters 1, 2, 3, 4) in the DMA and the remaining area is in an unrecorded state (i.e., before the finalization step), the recording / reproducing apparatus (Fig. 10) When loaded, the recording / playback apparatus (FIG. 10) checks the recording status of the DMA of the loaded disk, so that the loaded disk is in the pre-finalization stage, and the currently available TDMA is ATDMA2. The initial management information can be easily obtained by searching the ATDMA2 area.

Fig. 10 relates to a recording / playback apparatus on an optical disk to which the present invention is applied, and the recording / playback apparatus is composed of a recording / playback section 10 which performs recording / reproduction on an optical disk and a control section 20 controlling the same. The control unit 20 issues a recording or reproducing command to the recording / reproducing section 10 to the specific area, and the recording / reproducing section performs recording / reproducing to the specific area according to the command of the control section. Specifically, the recording and playback section 10 includes an interface section 12 for communicating with the outside, a pickup section 11 for directly recording or reproducing data on an optical disc, and a playback signal received from the pickup section. A data-processor 13 for restoring a signal value or modulating a signal to be recorded into a signal recorded on an optical disk, and transferring the data-processor 13 to pick up a signal accurately from the optical disk or to accurately record a signal on the optical disk. Servo unit 14 for controlling unit 11, memory 15 for temporarily storing various information and data including management information, and microcomputer 16 for controlling the components in the recording / reproducing unit 10. It can consist of.

A method of initially reproducing the management information of the present invention in the optical recording and reproducing apparatus as described above is as follows.

When the optical disc is loaded, the recording and reproducing section 10 should acquire various management information recorded in the loaded optical disc. In particular, if the loaded optical disc is a write once optical disc, e.g. a BD-WO, the microcomputer 16 in the recording / playback section 10 will try to confirm the final management information in the disc. The position of the area to which the final management information belongs is checked first by reproducing the recording state defined in.

That is, if the DMA has been recorded in the entire area, it is determined that the loaded disk is finalized and the final management information (DDS, T-Info (or SBM), DFL) is obtained from the corresponding DMA area, and the DMA is partially. When the recording is completed in the area, it is determined that the loaded disk has not been finalized, and at the same time, the position of the currently available TDMA is checked, and the final management information (in this case, TDDS) is searched first. , T-Info (or SBM), TDFL) is obtained.

The management information obtained through the above process may be specifically referred to as 'initialization information', and some of the initialization information may be transmitted to the control unit 20 for use in disc recording and reproduction, and the initialization information may be recorded and reproduced by the recording and reproducing unit 10. The memory 15 is temporarily stored in the memory 15 to be used for executing the next instruction from the controller 20. In the present invention, the above process is called 'initial regeneration method' for obtaining initialization information.

As mentioned above, preferred embodiments of the present invention are disclosed for the purpose 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.

The present invention facilitates disc defect management and general management by using a plurality of TDMAs and DMAs in a write once optical disc, and also makes it possible to easily obtain final management information from the recording state in the DMA during initial loading of the disc. Overall, there is an advantage that can further increase the efficiency of use of the optical disk.

Fig. 1 schematically shows the structure of a conventional rewritable optical disc,

Fig. 2 shows the structure of a single layer of a write once optical disc of the present invention;

Fig. 3 shows a dual layer structure of the write once optical disc of the present invention;

4 shows management information recorded in a temporary defect management area (TDMA) of an optical disc of write once type according to the present invention;

5 and 6 show the case where the temporary defect management area (TDMA) of the write once optical disc of the present invention becomes full;

Fig. 7 shows a recording method of a defect management area (DMA) of a write once type single-layer optical disc of the present invention,

Fig. 8 shows the structure of a defect management area (DMA) in a write once type dual-layer optical disc of the present invention,

Fig. 9 shows a method for recording a defect management area (DMA) of a write once type dual-layer optical disc of the present invention,

Fig. 10 shows a recording and reproducing apparatus of the write once optical disc of the present invention.

-Description of the main parts of the drawing-

10: recording and playback section 20: control section

16: micom 15: memory

Claims (10)

In a write once optical disc having a plurality of temporary defect management areas (TDMA) and a defect management area (DMA), The plurality of temporary defect management areas are used in a specific order, and each time each temporary defect management area becomes full, the management information recorded last in the temporary defect management area is transferred to the defect management area. A management information recording method of an optical disc, which can be written once. The method of claim 1, And management information recorded before the defect management area are disc recording status information (T-Info or SBM) and temporary disc definition structure (TDDS) information. The method of claim 1, And said temporary defect management area is provided with a maximum of two recording layers in the case of one recording layer. The method of claim 1, And said temporary defect management area is provided with a maximum of five when there are two recording layers. In a write once optical disc having a plurality of temporary defect management areas (TDMA) and a defect management area (DMA), Prior to finalizing the disk, each time the temporary defect management area becomes full, the management information recorded last in the temporary defect management area (TDMA) is transferred to the defect management area (DMA), A method of recording management information for a write once optical disc, characterized in that, at the disc finalizing, the management information recorded last in the entire temporary defect management area (TDMA) is transferred to the defect management area (DMA). The method of claim 5, The management information previously recorded in the defect management area before the finalize is disc recording status information (T-Info or SBM) and temporary disc definition structure (TDDS) information. Method for recording management information on an optical disc. The method of claim 5, The final management information previously recorded in the defect management area at the time of finalization is disk recording status information (T-Info or SBM), temporary disk definition structure (TDDS) information, and temporary defect list (TDFL). A management information recording method of an optical disc of write once type, characterized in that. In an optical disc having a management area, A plurality of temporary defect management areas (TDMA) and a defect management area (DMA) as the management area; Whenever each temporary defect management area becomes full before disk finalization in the defect management area (DMA), an area for previously recording the final management information in the temporary defect management area, and a disc final And an area for previously recording management information recorded last in the entire temporary defect management area (DMA) at the time of finalization. When the optical disc is loaded, checking whether or not the loaded disc is finalized from a defect management area (DMA) in the disc; If the disc is not finalized, recognizing the position of the currently available temporary defect management area (TDMA) from the recording state of the defect management area (DMA) and reproducing management information necessary for recording and reproducing the disc; And reproducing management information necessary for recording and reproducing the disc in a defect management area (DMA) if the disc is finalized.  When the optical disc is loaded, it checks a defect management area (DMA), checks whether the loaded disc is finalized from the defect management area, and finally manages the loaded disc according to the finalize. A recording and reproducing section which determines an area to acquire information, reads and temporarily stores final management information of the disc from the area; And a control unit which transmits a recording / reproducing command to the optical disc by using the management information.