KR20050015381A - 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 easily perform a disk defect management and a general management by using plural TDMAs(Temporary Defect Management Areas), and to separately record management information to easily obtain final TDDS(Temporary Disk Definition Structure) information, thereby increasing usage efficiency of the disk. CONSTITUTION: Plural TDMAs are used in specific order, and TDDS information is recorded within the TDMAs as disk management information. Among the plural TDMAs, management information which indicates a TDMA where final TDDS information is recorded is recorded within a specific area of a disk. The management information is recorded in an inner area of the disk, and is recorded by being adjacent to a DMA(Defect Management Area).

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. 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 addition, an inner spare area (ISA) and an outer spare area (OSA) are provided in the data area in the inner and outer peripheries of the data area, respectively, in the center of the user area (User Data). Area) is provided.

If a defective area exists in the data area while data is being recorded on the rewritable Blu-ray Disc, the data recorded in the defective area is moved to the spare area to perform alternative recording. As the management information on the defect area, information such as the position related to the defect area and the alternatively recorded area is recorded in the defect management areas DMA1, 2, 3, and 4 provided in the lead-in / out area to perform defect management. do. 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 defect management area of a predetermined size may be provided. In the case of the BD-RE, 32 clusters are allocated and used as the defect management area (DMA).

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. Defect management has also become an important issue. Therefore, even in a disc that can be written once, a management area for recording defect management and disc management information is required. In the case of an optical disc that can be written once, an area for recording management information is rewritten by the characteristic of 'one time' of recording. It will be needed more than possible discs, but it is not equipped with a unified standard that can accommodate the above requirements, and cannot be solved in any of the existing standards related to write-once optical discs. to be.

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. It is an object of the present invention to provide a method for separately recording and managing management information having a plurality of temporary defect management areas therein and increasing the use efficiency of the plurality of temporary defect management areas.

In order to achieve the above object, there is provided a method of recording management information of an optical disc of write once type, wherein the plurality of temporary defect management areas of a write once type optical disc having a plurality of temporary defect management areas and a defect management area. Are used in a specific order, and in the temporary defect management area, temporary disk definition structure (TDDS) information is recorded as disc management information every time recording, and the final temporary disk definition structure (TDDS) information of the plurality of temporary defect management areas is recorded. Characterized in that to record the management information indicating the temporary defect management area recorded in the specific area of the disk,

According to another aspect of the present invention, in the method of recording management information of an optical disc of write once type, in the write once optical disc having a plurality of temporary defect management areas and a defect management area, the plurality of temporary defect management areas are used in a specific order, And recording management information indicating the currently available temporary defect management areas among the temporary defect management areas.

Another method of recording management information of an optical disc of the present invention according to the present invention is a method of recording management information on an optical disc having a plurality of temporary defect management areas (TDMAs) and a defect management area (DMA). In this case, the plurality of temporary defect management areas are used in a serial order, and in each temporary defect management area, temporary disk definition structure (TDDS) information is recorded as disk management information, and a final temporary of the plurality of temporary defect management areas is recorded. The management information indicating the temporary defect management area in which the disk definition structure (TDDS) information is recorded is recorded in a specific area of the disk, and when the disk is finalized, the latest information recorded in the temporary defect management area is recorded in the defect management area (DMA). Characterized in that the previous recording within,

An optical disc of write once type according to the present invention includes a management area and a data area, and an area in which the plurality of temporary defect management areas are allocated is provided in the optical disc, and the plurality of temporary defect management areas are used in a specific order. And an area in which the management information indicating the location of the currently available temporary defect management area is recorded in the management area.

Another write once optical disc of the present invention includes a management area and a data area, and a plurality of temporary defect management areas are assigned to the optical disc, and the plurality of temporary defect management areas are used in a specific order. In the management area, management records the temporary disc definition structure (TDDS) information as disc management information at each recording time, and indicates the temporary defect management area in which the last temporary disc definition structure (TDDS) information is recorded among the plurality of temporary defect management areas. Characterized in that an area for recording information is provided in a specific area within the disc,

An initial reproducing method of a write once optical disc according to the present invention comprises the steps of: when an optical disc is loaded, checking information indicating a temporary defect management area in which final temporary disc definition structure (TDDS) information is recorded; Confirming the final temporary disk definition structure (TDDS) information in the temporary defect management area, and reproducing initialization information necessary for recording and reproducing the disc by using the identified temporary disk definition structure (TDDS) information. Characterized in that,

The recording / reproducing apparatus of the write once optical disc according to the present invention, when the optical disc is loaded, checks the information indicating the temporary defect management area in which the final temporary disc definition structure (TDDS) information is recorded, and is indicated by the information. A recording and reproducing unit for checking the final temporary disc definition structure (TDDS) information in the defect management area, and reading and temporarily storing initialization information necessary for recording and reproducing the disc using the identified temporary disc definition structure (TDDS) information; And a control unit for transferring a recording / reproducing command from the temporarily stored initialization information to the optical disc.

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 and 3 are specific 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 dual layer disc having two recording layers, each having a first recording layer (Layer0) and a second recording layer (Layer1). Each recording layer is provided with a management area (Inner Area, Outer Area) in the inner and outer peripheral areas. In FIG. 2, the characteristic optical disk structure of the present invention compared with the conventional one can be the following two types.

Firstly, due to the characteristics of an optical disc that can be written once, a large number of areas for recording various types of management information on the disc must be secured, and thus, a number of temporary defect management areas (Temporary Defect) in addition to the conventional defect management area (hereinafter referred to as 'DMA'). Or "TDMA" below the Management Area. 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. It is provided in the recording layer, and these are named PTDMA0 and PTDMA1, respectively. Next, an auxiliary temporary fault management area (hereinafter referred to as 'ATDMA') in conjunction with the size of the spare area in the spare areas OSA0, OSA1, and ISA1 having a variable size among the spare areas in the data area is provided. 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, 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 has a plurality of temporary defect management areas (TDMA) in addition to the defect management area (DMA), and the relationship between DMA and TDMA is that the disc no longer performs recording. In this case, the last information of the TDMA is previously recorded in the DMA, which is generally referred to as finalize. Details of the information recorded on the TDMA and the method of transferring to the DMA at the time of final will be described later.

Secondly, an area for recording management information for managing the plurality of TDMAs is provided separately. The term 'managing TDMA' means that a plurality (up to five) of TDMAs exist in the present invention, so that when the optical disc is inserted into a specific recording / reproducing apparatus (Fig. 14), the last information in the previously recorded TDMA is stored. This means that it is possible to easily identify which of the plurality of TDMAs, thereby reducing the time required for the recording and reproducing apparatus (Fig. 14) to secure initialization information. In particular, as will be described later with reference to FIG. 3, since the last information of the temporary disc definition structure (TDDS), which is always recorded last among the information recorded in the TDMA, needs to be quickly reproduced at the time of initialization, in the present invention, Such management information is named TLI (TDDS Location Indicator or TDMA Location Indicator). The management information (TLI) of the present invention can exist in various areas of the disc, and in particular, any area can be reproduced by the recording / reproducing section (FIGS. 14 and 10) to initially acquire the disc's initialization information. something to do. In the present invention, a preferred recording position of the management information (TLI) will be described later through various embodiments.

FIG. 3 shows various types of disc management information recorded in TDMA of the present invention, for example, in which at least one cluster, which is a minimum recording unit, is recorded for each recording, and temporary disc definition structure (TDDS) information is always recorded in the last sector of one cluster. Characterized in that to record.

The TDDS is an area containing general management information of a disc. The TDDS includes not only information for defect management but also pointer information for designating a location of other management information. , 10) is always the first thing to check. 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, it is possible to confirm all kinds of management information on the current disk usage status.

In addition, in TDMA, as a defect management information, a temporary defect list (hereinafter referred to as a TDFL) for managing a defective area on an optical disc that can be written once is created, and then combined with the TDDS to create one cluster. The data is recorded in TDMA (PTDMA or ATDMA). 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.

Also, as management information recorded in TDMA, 'SBM' (Space Bit-Map) and 'T-Info (Track-Information)' indicating the disk recording status are recorded. 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. It is a record. In particular, the SBM and the T-Info are managed as SBM information when the disc is to be randomly used according to the mode of the disc, and when the disc is used sequentially, it is managed as the T-Info information. The structure of the specific TDFL, SBM, T-info is not significantly related to the main technical problem of the present invention, and the detailed description of the same name will be omitted in the same name, but the patent application 2003-33008, Patent application 2003-37618 describes this in detail.

4, 5, 6, 9, and 12 are specific embodiments of a position of recording management information (TLI) of the present invention. In particular, FIG. 9 shows a case of recording management information (TLI) in a defect management area (DMA). 12 shows a case where the management information TLI is recorded in the temporary defect management area TDMA.

First, the management information (TLI) of the present invention will be described in detail. As already mentioned in the overall conceptual description of the present invention of FIG. 2, the TLI is used as the following meaning as information for managing a plurality of TDMAs. .

First, TLI is information indicating the position of the final TDDS. That is, the TDDS is information updated every time in the TDMA, and it is most important to identify the position of the final TDDS. Of course, it is also possible to search all the TDMA (up to five) areas on the disk to check the final TDDS location, but this may cause excessive initialization time. Used to indicate if TDDS exists.

Secondly, the TLI can be used as information indicating where the currently available TDMA area is. In general, the usable TDMA area becomes the area where the final TDDS is located. However, in some cases, the usable TDMA and the final TDDS are different. For example, if the order of TDMA is defined as PTDMA0-> PTDMA1-> ATDMA0-> ATDMA1-> ATDMA2, then the last TDDS is recorded in the last cluster of PTDMA0. However, the usable TDMA will be PTDMA1 and may be different from each other. However, except for the special case, as described above, the usable TDMA region and the region where the final TDDS is located will be the same region.

In the present invention, various usage methods will be described according to the definition of the TLI.

4 to 12 show an embodiment relating to a position where a TLI is recorded in a disc and an embodiment relating to a method of recording a TLI.

The location where the TLI is recorded is sufficient in the management area except for the data area, but as an example of the specific recording location, in FIG. 4, 5 and 6, the location is recorded adjacent to the defect management area (DMA), and FIG. The case is recorded in the defect management area (DMA), and FIG. 12 relates to the case where it is recorded in the temporary defect management areas PTDMA0 and PTDMA1.

First, Figs. 4, 5 and 6 show the case where the TLI is recorded adjacent to the defect management area (DMA) in the disc, and Fig. 4 generally shows the case where the TLI is recorded adjacent to the DMA. Since the DMA will become an area checked by the recording and playback section (Figs. 14 and 10) first when the disc is loaded, it is possible to check the TLI first by recording the TLI adjacent to the DMA. Fig. 5 shows a case where the TLI is recorded adjacent to only the DMA located in the inner area of the disc. When the disc is loaded, it is common for the recording / playback section (Figs. 14 and 10) to check the management area of the inner circumference. The TLI may be located only in the inner peripheral area. 6 shows a case where TLI is recorded adjacent to the DMA of the first recording layer in the dual layer.

7 and 8 illustrate an embodiment of a method for recording a TLI of the present invention. FIG. 7 illustrates a case in which a TLI is configured by four clusters when up to five TDMAs exist. FIG. 8 illustrates a case where up to five TDMAs exist. This is the case when TLI consists of 5 clusters.

FIG. 7A shows a case of a single layer having one recording layer, and FIG. 7B shows a case of a dual layer having two recording layers. As described above, in the single layer, only two TDMAs exist (PTDMA0, ATDMA0), but in the dual layer, there are up to five TDMAs (PTDMA0, PTDMA1, ATDMA0, ATDMA1, ATDMA2).

First, in order to apply the present invention, the order of use of TDMA should be determined. This can be determined in various ways during the specification establishment process. In the present invention, for convenience of description, it is assumed that the dual layer is used in the order of PTDMA0-> PTDMA1-> ATDMA0-> ATDMA1-> ATDMA2.

Initially, the optical disc will use the PTDMA0 area as the first management area, but if all of the corresponding areas are used, then the PTDMA1 will be used second. At this time, the TLI is information for designating a TDMA area in which the last TDDS is located in the current disk. If the available TDMA area is changed to PTDMA1, the TLI is also written to the first cluster in the TLI. That is, in FIG. 7B, if the cluster is recorded as a 'PTDMA0 full indicator' in the TLI, this means that the TDMA region PTDMA0 indicated by the cluster is full. In this case, 'recording in the TLI' means to make the cluster in the TLI in a recording state, and what information is actually recorded is a side issue. In the present invention, specific recording information will be described later with reference to FIG. Is expected. Therefore, if the recording / reproducing section (FIGS. 14, 10) searches the TLI area when the optical disc is loaded, and only the first cluster is in the recording state, the recording / reproducing section (FIGS. 14, 10) indicates the 'PTDMA0' area of the first cluster. It is no longer available and it is determined that the final TDDS is recorded in PTDMA1. Likewise, when the use of PTDMA1 is completed, the second cluster of TLI is written into the recording state, which means that the next TDMA ATDMA0 is currently in use and the last TDDS is located in ATDMA0. Continued recording of TDMA and TLI in the same manner as above means that when the use of the fourth TDMA ATDMA1 is completed, the fourth cluster of TLI is written, meaning that the next ATDMA2 is currently in use and the last TDDS is located in ATDMA2. In this case, the cluster in all TLIs is in the recording state. If ATDMA2 is used even in this state, the disk is finalized and no further writing to the disk is allowed. Therefore, the latest information recorded in the TDMA is recorded. Is previously recorded in the final management area DMA.

Therefore, if the finalization concept is applied together as described above, the TLI can display up to 5 TDMA regions with only 4 clusters in total.

FIG. 8 shows another method of recording in TLI, where FIG. 8A is for a single layer with one recording layer, and FIG. 8B is for a dual layer with two recording layers. Therefore, in the case of the dual layer, a total of five clusters are used to write in the TLI. The specific recording method is the same as in FIG. 7, but when the last TDMA, ATDMA2, can no longer be recorded, the fifth (last) cluster of TLI is made into a recording state, and the entire TDMA is full, and the disk is finalized. It is defined as meaning that it is. Therefore, when the recording and reproducing section (FIGS. 14 and 10) confirms that all TLI regions are in the recording state with respect to the TLI recorded as shown in FIG. 8, the corresponding disk can be determined to be finalized.

7 and 8 show an embodiment in which the TLI is recorded, which is recorded in substantially the same manner, but only one cluster is allocated in the case of FIG. 8 depending on whether the disk finalization is represented as a TLI. There will be a difference.

9 shows a case where the TLI is recorded in the defect management area (DMA). In the case of a single layer, a method of allocating an area for recording TLI at the beginning of each DMA (composed of 32 clusters) is used.In the case of a dual layer, an area for recording TLI is allocated at the beginning for each DMA (composed of 64 clusters). That's the way. In particular, in the case of the dual layer, since the same DMA located in each recording layer is used as one area, the head of the DMA means only the DMA area of the first recording layer Layer0. For example, the first recording layer DMA1 (32 clusters) + the second recording layer DMA1 (32 clusters) = dual layer DMA1 (64 clusters), and the head of the DMA1 (64 clusters) is always in the first recording layer. The same applies to DMAs 2, 3 and 4.

10 and 11 show a structure in which the TLI is recorded in the DMA when the TLI is recorded in the DMA as shown in FIG. 9, FIG. 10 shows a case of a single layer, and FIG. 11 shows a case of a dual layer. In particular, the TLI in the DMA is recorded every time TDMA becomes full, but the rest of the area in the DMA is recorded only when the final disk is final, as described above.

Fig. 10 is a single layer, one DMA is composed of 32 clusters in total, TLI is allocated to the first four clusters, and the area for recording the remaining T-Info (or SBM) + DDS and DFL is stored in TDMA. As the final information, the T-Info (or SBM) + TDDS cluster and the TDFL cluster are transferred and recorded, respectively. In this case, in order to maintain maximum compatibility with the DMA structure of the BD-RE, the TDFL is repeatedly recorded up to six times in the DFL area similarly to the BD-RE. FIG. 11 shows a case of dual layer, in which one DMA is composed of 64 clusters in total, TLI is allocated to the first four clusters, and the area for recording the remaining T-Info (or SBM) + DDS and DFL is stored in TDMA. As the final information, the T-Info (or SBM) + TDDS cluster and the TDFL cluster are transferred and recorded, respectively.

10 and 11, the detailed recording method of the TLI will be the same as described above with reference to FIGS. 7A and 7B. That is, in FIG. 11, when the TDMA becomes full, the TLI area in the DMA is written to each cluster by one cluster. Finally, when the TLI area becomes full until the last TDMA ATDMA2, the disk is finalized. The remaining DMA areas are recorded in a predefined manner.

Therefore, when the disc is loaded, the recording and reproducing unit (FIGS. 14 and 10) first checks the DMA area. If the TLI area is in the recording state, the corresponding TDMA becomes full, and in which TDMA the final TDDS information is located. If the remaining area of the DMA is recorded, the disc can not be written any more as the finalized case, and the DFL. Final disk management information such as SBM, T-Info, etc. can be obtained from the DMA.

In the case of recording the TLI in the DMA, the recording method as shown in Fig. 7 which allocates four clusters in the TLI area is preferable. In the case of allocating five clusters as shown in Fig. 8, compatibility with the existing DMA may occur. Since the remaining DMA area is used, there is no need to indicate the final status by allocating one more cluster.

Fig. 12 shows the case where TLI of the present invention is recorded in TDMA. In particular, the method of recording in the head area of PTDMA0 or / and PTDMA1 located in the inner area of the TDMA. This embodiment is applicable when there is no free space for recording the TLI in the management area of the BD-WO, and may be recorded by applying any one of the TLI recording methods of FIG. 7 or 8. In the present embodiment, the TLI in PTDMA0 may be used in actual application, and TLI is additionally recorded in PTDMA1 as a concept of replacing TLI information in PTDMA0.

As can be seen from Figure 3 to Figure 12, the present invention confirmed that the TLI can be recorded in various ways as management information for confirming the location of the final TDDS. In other words, the TLI records the recording / reproducing section (Figs. 14 and 10) in the management area that acquires the initial information when the disc is loaded, thereby reducing the overall initialization time by allowing the recording / reproducing section to acquire the final TDDS faster. Will be.

Figure 13 illustrates a specific method of recording the TLI of the present invention. In particular, FIG. 13 enables to obtain specific information through the TLI by newly defining the information recorded in the TLI. In particular, the TLI enables the identification of the TDMA where the final TDDS is located, as well as the location of the currently available TDMA. It is possible.

In detail, the present invention separately records information indicating the location of the final TDDS in the TLI. As described above with reference to FIGS. 7 and 8, when a specific cluster in the TLI is in a recording state, the TDMA indicated by the cluster indicates a full state, which means that the next TDMA is available. The TDDS will be located in the available TDMA, but in special cases, for example, if the last TDDS is recorded in the last cluster of PTDMA0, the TDMA area containing the last TDDS (PTDMA0) and the next available TDMA area (PTDMA1). This may be different, and the information is previously recorded in the TLI to indicate which TDMA the final TDDS is located in order to prevent an error in advance.

The TLI recording method of Fig. 13 is specifically described as follows. First, the TLI is recorded in units of one cluster, which is a minimum recording unit, and is recorded when the TDMA indicated by the cluster becomes full. At this time, the first sector (sector0) in the cluster consisting of 32 sectors has an identification field (identifirer) for recognizing TLI information, a TLI Format field related to the current disk version, and a count value each time TLI is updated. There is an update count field in increments. The update count field may also be used as information indicating the number of clusters in the TLI. Next, there is a field that provides information about the TDMA where the last TDDS is located (Last TDDS location), and the remaining area of the first sector (sector0) is written to a preset value (for example, "00h"). setting).

The "Last TDDS location" field of the first sector (sector0) is information indicating a TDMA area in which the last TDDS is recorded, regardless of whether the TDMA is full. For example, "0000 0000b" indicates that the last TDDS is "0000 0001b" means that the last TDDS is in PTDMA1, "0000 0010b" means that the last TDDS is in ATDMA0, and "0000 0011b" means that the final TDDS is in ATDMA1. "0000 0100b" means that the present TDDS is present in ATDMA2.

Next, after the second sector (sector1), the contents of the final TDDS are recorded directly. Since the TDDS is composed of one sector, the last TDDS information corresponding to the time of writing to the TLI is also recorded in the TLI, so that the TDMA area can be used to recover some contents in case of damage to the TDMA area.

Fig. 14 relates to a recording / playback apparatus for an optical disk to which the present invention is applied, and the recording / playback apparatus is composed of a recording / playback section 10 for recording and playback on an optical disk and a control section 20 for controlling it. 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, for example a BD-WO, the microcomputer 16 in the recording / reproducing section 10 will try to confirm the final TDDS information in the disc, and for this purpose, By reproducing the management information (TLI) defined at the location, the location of the TDMA to which the final TDDS belongs is first identified. From this, the TDMA area is searched to obtain final TDDS information, and from the final TDDS information, disk management information in the TDDS and other management information indicated by the TDDS (ex, TDFL, SBM, T-Info, etc.) You will get them. The information obtained through the above process may be referred to as 'initial information', and some of the initialization information may be transmitted to the control unit 20 for use in disc recording and reproducing, and the initialization information may be stored in the recording and reproducing unit 10. Temporarily stored in the memory 15 to be used for the next command execution from the control unit 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 disk defect management and general management by using a plurality of TDMAs in a write-once optical disc, and separately records management information (TLI) for easily acquiring the final TDDS information recorded in the TDMA. According to Doom, there is an advantage that the use efficiency of a write once optical disc using TDMA can be further increased.

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

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

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

Fig. 4 shows one embodiment in which the management information TLI of the write once optical disc of the present invention is recorded adjacent to the defect management area DMA,

Fig. 5 shows another embodiment in which management information TLI of a writeable optical disc of the present invention is recorded adjacent to a defect management area DMA;

Fig. 6 shows another embodiment in which management information TLI of a writeable optical disc of the present invention is recorded adjacent to a defect management area DMA;

7A and 7B show one embodiment in which management information (TLI) of a writeable optical disc of the present invention is recorded,

8A and 8B show another embodiment in which management information (TLI) of a writeable optical disc of the present invention is recorded,

Fig. 9 shows an embodiment in which the management information TLI of the writeable optical disc of the present invention is recorded in the defect management area DMA;

FIG. 10 shows a method for recording a defect management area (DMA) in the single layer in the case of FIG.

FIG. 11 shows a method for recording a defect management area (DMA) in the dual layer in the case of FIG.

Fig. 12 shows an embodiment in which the management information TLI of the write once optical disc of the present invention is recorded in the temporary defect management area TDMA;

Fig. 13 shows in detail the method of recording management information (TLI) of the present invention;

Fig. 14 shows a recording and reproducing apparatus of the write once optical disc of the present invention.

Claims (27)

In a write once optical disc having a plurality of temporary defect management areas and a defect management area, The plurality of temporary defect management areas are used in a specific order. In the temporary defect management area, temporary disk definition structure (TDDS) information is recorded as disk management information every time recording is performed. Recording management information of a write once type optical disc, wherein management information indicating a temporary defect management area in which the last temporary disc definition structure (TDDS) information of the plurality of temporary defect management areas is recorded is recorded in a specific area of the disc; Way. The method of claim 1, And the management information is recorded in the disc inner peripheral area. The method of claim 1, And the management information is recorded adjacent to the defect management area. The method of claim 3, wherein And said management information is recorded adjacent to a defect management area located in a disk inner circumference area. The method of claim 1, And the management information is recorded in the defect management area. The method of claim 1, And the management information is recorded in the temporary defect management area. The method of claim 1, And wherein said writeable optical disc has two recording layers. The method of claim 7, wherein And said management information is recorded in the defect management area of the first recording layer (L0) of the two recording layers. The method of claim 7, wherein And said management information is recorded in the temporary defect management area of the inner peripheral area of each of the two recording layers. The method of claim 7, wherein And a plurality of temporary defect management areas exist up to five times. The method of claim 1, The management information records the minimum recording unit in the area for recording the management information every time the temporary defect management area including the final temporary disc definition structure (TDDS) information is changed. How to record information. The method of claim 11, And the minimum recording unit is a cluster. The method of claim 12, And all the clusters in the area for recording the management information are in the recording state, and the defect management area is also in the recording state, indicating that the disc is finalized. The method of claim 12, And when the disc is finalized, final temporary disc definition structure (TDDS) information is recorded in the defect management area. In a write once optical disc having a plurality of temporary defect management areas and a defect management area, And wherein the plurality of temporary defect management areas are used in a specific order and record management information indicating a currently available temporary defect management area among the plurality of temporary defect management areas. The method of claim 15, And the management information is recorded in the disc inner peripheral area. The method of claim 15, And the management information is recorded adjacent to the defect management area. The method of claim 15, And the management information is recorded in the defect management area. The method of claim 15, And the management information is recorded in the temporary defect management area. The method of claim 15, And wherein the management information includes information indicating the location of the temporary defect management area where the final temporary disc definition structure (TDDS) information is located. A method of recording management information on an optical disc having a plurality of temporary defect management areas (TDMA) and a defect management area (DMA), While the disk is in use, the plurality of temporary defect management areas are used in a sequence, and in each temporary defect management area, temporary disk definition structure (TDDS) information is recorded as disk management information. Among the plurality of temporary defect management areas, management information indicating a temporary defect management area in which final temporary disk definition structure (TDDS) information is recorded is recorded in a defect management area (DMA), And recording the latest information recorded in the temporary defect management area into the defect management area (DMA) before the disc is finalized. The method of claim 21, And the management information is recorded at the head of the defect management area. The method of claim 22, And the management information records a minimum recording unit each time the temporary defect management area in which the last temporary disc definition structure (TDDS) information is recorded is changed. In an optical disc having a management area and a data area, In the optical disc, an area to which a plurality of temporary defect management areas are allocated is provided, and the order of use of the plurality of temporary defect management areas is determined in a specific order, and the positions of the currently available temporary defect management areas in the management area. And an area in which management information indicating is recorded. In an optical disc having a management area and a data area, A plurality of temporary defect management areas are allocated to the optical disc, and the plurality of temporary defect management areas are used in a specific order. In the temporary defect management area, temporary disc definition structure (TDDS) information is used as disc management information for each recording. And a recording area for recording management information indicating a temporary defect management area in which the last temporary disk definition structure (TDDS) information is recorded, among the plurality of temporary defect management areas, in a specific area of the disc. Recordable optical disc. When the optical disc is loaded, checking the information indicating the temporary defect management area in which the final temporary disc definition structure (TDDS) information is recorded; Identifying final Temporary Disk Definition Structure (TDDS) information in the temporary defect management area indicated by the information; And reproducing initialization information necessary for recording and reproducing the disc using the checked temporary disc definition structure (TDDS) information.  When the optical disc is loaded, the information indicating the temporary defect management area in which the final temporary disk definition structure (TDDS) information is recorded is checked, and the final temporary disk definition structure (TDDS) information in the temporary defect management area indicated by the information is indicated. A recording and reproducing unit for reading and temporarily storing initialization information necessary for recording and reproducing the disc using the identified temporary disc definition structure (TDDS) information; And a control unit which transmits a recording / reproducing command from the temporarily stored initialization information to the optical disc.