KR20050079677A - Method and apparatus for recording management information on optical disc write once - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a write once optical disc and a method of recording management information of an optical disc. In the write once optical disc having a plurality of temporary disc management areas (TDMAs), the plurality of temporary disc management areas (TDMAs) are provided. Is used in a specific order, characterized in that the management information indicating the position of the temporary disk management area (TDMA) currently in use among the plurality of temporary disk management areas (TDMAs) is recorded in a specific area of the disc. By reducing the access time to the position of the TDMA currently being used, there is an advantage that the use efficiency of a write once optical disc utilizing TDMA can be further increased.

Description

Recording method and recording and reproducing apparatus for optical discs and optical discs that can be recorded once {Method and apparatus for recording management information on optical disc write once}

       The present invention relates to a write once optical disc and a method and apparatus for recording management information of an optical disc.

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

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

In connection with this, various standard proposals relating to Blu-ray Discs (BDs) have been prepared, and various standard proposals for write-once Blu-ray Discs (BD-WOs) have been prepared following the rewritable Blu-ray Discs (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 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 BD-RE, the data recorded in the defective area is moved to the spare area for replacement and 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 Blu-ray Disc (BD), the minimum recording unit to be recorded on the disk is the minimum unit of cluster, one cluster is composed of 32 sectors in total, and one sector is composed of 2048 bytes. do.

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). Since only a defect management area of a predetermined size may be provided, in the case of BD-RE, 32 clusters are allocated and used as a 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 usage status information is required. In particular, an optical disc that can be written once has the defect management and disc usage states due to the characteristic of 'one time recording'. More information recording area would be required than a rewritable disc, but there is no unified standard that can accommodate the above requirements. This situation can not be solved.

Accordingly, the present invention has been made in view of the above circumstances, and provides a method for recording disc management information on an optical disc that can be recorded once, a method for initializing a disc, an initial reproducing method, and the like, in particular 1 It is an object of the present invention to provide a method of separately recording and managing management information for improving the use efficiency of a plurality of temporary disk management areas (TDMA) in a write-once optical disc.

In order to achieve the above object, there is provided a management information recording method of an optical disc of write once type, wherein the plurality of temporary disc management areas are provided in a write once type optical disc having a plurality of temporary disc management areas (TDMAs). (TDMA) is used in a specific order, characterized by recording management information indicating the position of the temporary disk management area (TDMA) currently being used among the plurality of temporary disk management areas (TDMA) in a specific area of the disc. ,

Another management information recording method of an optical disc of write once type according to the present invention is characterized in that, in a write once optical disc having a plurality of temporary disc management areas (TDMAs), the plurality of temporary disc management areas (TDMAs) are specified in a specific order. The last used temporary disk management area (TDMA) is used as an extended temporary disk management area (TDMA), and the position of the temporary disk management area (TDMA) currently in use among the plurality of temporary disk management areas (TDMA). Recording first management information indicating a second management information indicating an area currently in use in the extended last temporary disk management area (TDMA) in a specific area of the disc,

According to another method of initializing a writeable optical disc of the present invention, the allocation mode of the spare area is determined, and the allocation size of the last used temporary disk management area (TDMA) is determined according to the determined spare area allocation mode. According to the size of the determined last temporary disk management area (TDMA), the size of the area for recording management information indicating the location of the temporary disk management area (TDMA) currently in use is determined and allocated,

Another initialization method of a write once optical disc of the present invention determines whether or not to extend a spare area including a temporary disk management area (TDMA), and allocates a spare area when the spare area is extended allocated. And determining the allocation size of the temporary disk management area (TDMA) included in the spare area, and considering the size of the determined temporary disk management area (TDMA), managing the temporary disk currently in use in the temporary disk management area (TDMA). Determining and allocating first management information indicating a location of a region (TDMA) and a region for recording second management information indicating a region currently in use in the extended last temporary disk management region (TDMA); Characterized in that,

Another writeable optical disc of the present invention is an optical disc having a management area and a data area, wherein the optical disc includes an area to which a plurality of temporary disk management areas (TDMAs) are allocated, and the plurality of temporary disk management areas ( TDMA) is characterized in that the order of use is determined in a specific order, and in the management area, an area in which management information indicating the position of the temporary disk management area (TDMA) currently being used is recorded.

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 disc management area (TDMA) in which final temporary disc definition structure (TDDS) information is recorded; Confirming final temporary disk definition structure (TDDS) information in the temporary disk management area (TDMA) indicated by the information; and initializing required for recording and reproducing the disc using the checked temporary disk definition structure (TDDS) information. Characterized in that it comprises the step of reproducing the information,

The recording / reproducing apparatus for a write once optical disc according to the present invention includes a pickup unit for recording information in a disc, and a temporary disc management structure (TDMS) information in a plurality of temporary disc management areas (TDMAs) determined to be used in a specific order. Recording, but when the recording of the specific temporary disk management area (TDMA) is completed, the microcomputer controls to record management information on the disk indicating that recording of the specific temporary disk management area (TDMA) is completed through the pickup unit. It is done.

      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.

      2A to 3 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. 2A is a write-once optical disc structure of the present invention and 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 is as follows.

First, 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 plurality of temporary disc management areas (hereinafter referred to as "TDMA") in addition to the conventional defect management area (DMA). Characterized in having a.

In particular, TDMA is classified into two types: temporary disk management areas (TDMA0, TDMA1) having a fixed size (for example, 2048 cluster) in the inner area, and variable sizes in the data area. The spare areas OSA0, OSA1, and ISA1 are divided into temporary disk management areas TDMA2, TDMA3, and TDMA4 provided in association with the size of the spare area.

Whereas TDMA0 and TDMA1 are areas that must be provided in the disk, TDMA2, TDMA3, and TDMA4 are defined as a selectively assignable structure, and various sizes can be determined at the time of allocation, and a quarter size of the spare area is appropriate. Will do. Therefore, the size of TDMA2 and TDMA3 is suitably P = N * 256/4 cluster, and the size of TDMA4 is suitably Q = L * 256/4 cluster. Also, the plurality of TDMAs may be used in a specific order of use, for example, TDMA0 to TDMA4. The identification numbers (TDMA0 to TDMA4) attached to the TDMA are given in serial order in consideration of the order of use.

That is, the write once optical disc of the present invention has a plurality of temporary disk management areas (TDMA) in addition to the defect management area (DMA), and the plurality of provided TDMAs are used in a specific order of use. Information recorded on the TDMA will be described later in detail with reference to FIG. 3.

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 information on which TDMA is currently in use when the optical disc is inserted into a specific recording / reproducing apparatus (Fig. 13). This means that the final defect management and disc usage information recorded in the TDMA currently being used can be easily reproduced early, thereby reducing the initial access time as a whole.

In this regard, the information indicating "TDMA currently in use" will be referred to hereinafter as TLI Location Indicator (TLI), and it will be understood that management information in the present invention means "TLI".

FIG. 2B is a write-once optical disc structure of the present invention, which relates to a single layer disc having one recording layer, and includes a lead-in area, a data area, and a data area; A lead-out area is provided, and spare areas ISA0 and OSA0 are provided in the data area, and temporary disk management areas TDMA0 and TDMA1 are provided in the lead-in area and the outer spare area OSA0. The structure provided is respectively shown.

That is, in the case of a single layer disk, two TDMAs exist (TDMA0, TDMA1), and management information (TLI) designating the TDMA currently being used is recorded in the lead-in area. .

In addition, the management information (TLI) of the present invention mentioned in Figs. 2A and 2B can be provided in various areas of the disc, and in particular, the recording / playback apparatus (Fig. 13) displays various disc information before actual recording and reproducing. Any management area (Lead-In Area, Lead-Out Area, etc.) to be reproduced may be used. However, in the present invention, a recording position of the management information (TLI), which is preferable, will be described later through various embodiments. to be.

Fig. 3 shows various disc defect management and disc usage state information recorded in TDMA of the present invention, for example, and at least one cluster, which is a minimum recording unit, is recorded for each recording, and the information recorded in the TDMA is collectively referred to. It is referred to as Temporary Disc Management Structure (TDMS) information.

In this regard, the TDMS information can be composed of various information as follows, which can be changed or added according to the matter determined by the standard, for example, there can be the following types of information. That is, "TDFL (Temporary Defect List)" for recording the disk defect management information, "Sequential Recording Range Information" and "RRI" applied to the sequential recording mode as information indicating the disk usage status, and random. &Quot; SBM (Space-Bit Map) " applied to the recording mode (Random recording mode) is selectively recorded according to each recording mode. Also, the last sector of one cluster (or a plurality of clusters) is always recorded in the TDFL, SRRI ( or "TDDS (Temporary Disc Definition Structure)" for recording various other information including the latest location information of SBM).

In this regard, the "TDDS" is also called "temporary disc definition structure information" and is a region containing general recording and reproducing information of a disc. As described above, the latest positions of TDFL and SRRI (or SBM) are designated. It contains pointer information, which is information that should always be checked first when the disc is loaded into the recording / playback apparatus (Fig. 13). 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.

Hereinafter, specific structures of the TDFL, SBM, SRRI, and TDDS are not related to the main technical problems of the present invention, and detailed descriptions thereof will be omitted.

As described above, the TDMA for recording the TDMS configured as described above is used in a specific order of use. For example, first, when necessary, the TDMS is updated in the first used TDMA0, and then all TDMA0 is used (recorded). In this case, the TDMS is then updated to TDMA1. The present invention is characterized by having a management information (TLI) that tells which of the TDMA is currently in use among the TDMA used in the specific order of use and a method for recording the same. .

4A to 4B relate to a first embodiment of recording management information (TLI) of the present invention, characterized in that only the location of the TDMA currently being used is specified, and FIG. 4A is a single layer with one recording layer. 4B shows a case of a dual layer having two recording layers.

FIG. 4A is a diagram for explaining a method of recording management information TLI in the case where the write once optical disc of the present invention is a single layer disc having one recording layer as shown in FIG. 2B.

That is, in the case of a single layer disk, two TDMAs exist in the disk (TDMA0, TDMA1), and one cluster is required for TLI information for managing the same. Specifically, clusters in a TLI are defined in a one-to-one correspondence with a specific TDMA, and when the cluster is recorded, the corresponding TDMA is defined as being currently in use.

Therefore, if the TLI 1 cluster of FIG. 4A is not written, the first TDMA0 will be the TDMA currently in use, but if the TLI 1 cluster is written, the second TDMA1 will be the TDMA currently in use.

That is, the optical recording / reproducing apparatus (Fig. 13) uses TDMA0 for the first time, and when the use is completed, the next TDMA1 is used, and the TLI 1 cluster is recorded, indicating that the TDMA currently being used is TDMA1. In relation to the recording in the TLI, it is sufficient to confirm that the cluster is in a recording state, but it may be recorded by using a high frequency signal to more easily check whether the corresponding part is recorded. Dummy data may be recorded, but meaningful actual data may be recorded, and an example of recording real data will be described later with reference to FIG. 8.

FIG. 4B is a diagram for explaining a method of recording management information (TLI) when the writeable optical disc of the present invention is a dual layer disc having two recording layers as shown in FIG. 2A.

That is, in the case of a dual layer disk, up to five TDMAs can exist in the disk (TDMA0 to TDMA4), and four clusters are required for TLI information for managing the same.

Thus, if the TLI 4 cluster of FIG. 4B has not been written, the first TDMA0 will be the TDMA currently in use, and if the first TLI cluster is written, this means that TDMA0 is complete and the TDMA currently in use is TDMA1. If the second TLI cluster has been written, this means that TDMA1 is complete, and the TDMA currently in use is TDMA2, and if the third TLI cluster has been written, it means that TDMA2 is complete and TDMA3 currently in use is TDMA3. If the fourth TLI cluster has been written, this means that TDMA3 is complete and TDMA4 currently in use becomes TDMA4.

Thus, for example, if two clusters are recorded in the TLI as shown in Fig. 4C, this means that TDMA0 and TDMA1 are used, and the currently available TDMA is TDMA2.

That is, when the disc is loaded, the optical recording and reproducing apparatus (FIG. 13) can check the recording state in the TLI and confirm the position of the TDMA currently being used. By reading this, various kinds of initialization information for recording and reproducing can be obtained early. Therefore, if the management information TLI does not exist, the optical recording / reproducing apparatus (Fig. 13) must scan all TDMA regions starting from TDMA0 to find a currently available position, so that the setting time for initial recording / reproducing It will be said that there are issues that this you are spending.

5 to 7 are embodiments of positions where the management information TLI of the present invention is recorded in the disc.

That is, the position where the management information TLI is recorded is a management area excluding the data area, and it is sufficient if it is within an area that can be recognized by the optical recording / reproducing apparatus initially. As a specific embodiment, Fig. 5 is the first temporary disk. The case is provided at the end of the defect management area (TDMA0), and FIG. 6 is the case where it is provided at the head of the first temporary disk defect management area (TDMA0), and FIG. It is shown.

5 to 7 illustrate the case of the dual layer, but the same applies to the case of the single layer.

8 illustrates a specific method of recording the management information (TLI) of the present invention. As described above, the TLI of the present invention may display only the recording state of a corresponding cluster without recording specific data. In this embodiment, by defining specific data when recording the TLI cluster and recording the specific data, the present invention has an advantage of additionally obtaining specific information through the TLI. In particular, through the TLI, the position of the currently available TDMA can be identified, as well as the position of the TDMA where the final TDDS is located.

Specifically, FIG. 8 separately records information indicating the position of the final TDDS when recording a specific cluster in the TLI. As described above, if a specific cluster in the TLI is in a recording state, this means that the TDMA indicated by the cluster is the TDMA currently in use. Generally, the final TDDS will be located in the TDMA currently in use. For example, if the final TDDS is recorded in the last cluster of each TDMA, there may be a case where the TDMA including the last TDDS and the currently available TDMA are different from each other, so that the TDMA in which the final TDDS is located in the TLI is located. This is to prevent the error in advance by recording the information separately.

That is, it will be described in detail as follows. First, the TLI is recorded in the unit of one cluster, which is the minimum recording unit. The first sector (sector0) in the one cluster composed of 32 sectors has an "identifirer" for recognizing TLI information and a "disk associated with the version of the current disk." There is a TLI Format information field and an "update count" field that increments the count value by one each time the TLI is updated. In this regard, the update count field may be used as information indicating the cluster number of the cluster 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 Set to ").

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 TDMA has been used. For example, if "0000 0000b", the last TDDS is assigned to TDMA0. "0000 0001b" means that the last TDDS is in TDMA1, "0000 0010b" means that the last TDDS is in TDMA2, and "0000 0011b" means that the final TDDS is in TDMA3. "0000 0100b" may be defined as meaning that the final TDDS exists in TDMA4.

Thus, if the "Last TDDS location" field is "0000 0000b" with the first cluster in the TLI being written, this means that the currently available TDMA is TDMA1, but the last updated TDDS in the disk is in TDMA0. Done.

Next, in the second sector (sector1), the final TDDS information corresponding to the time of recording in the TLI is also recorded in the TLI, so that the TDMA region can be used to recover some contents when the TDMA area is damaged.

9A to 10B relate to a second embodiment of recording management information (TLI) of the present invention. In the case where the spare area is allocated to the extended mode, the position of the TDMA currently being used is, of course, It is characterized by designating a section currently in use among the sections of the TDMA existing in the extended spare area. FIGS. 9A and 9B show a case of a single layer having one recording layer, and FIGS. 10A and 10B. Shows a case where it is applied to the case of a dual layer having two recording layers.

FIG. 9A illustrates a single layer disk structure according to an extended spare area, and extending a spare area means that a spare area OSA0 existing at the end of the user data area in consideration of future use in initializing the disk. Is assigned within 50% of the maximum disk recording capacity. As the spare area OSA0 expands, the TDMA1 existing in the spare area OSA0 also expands together.

When TDMA1 is extended to a specific size as described above, the TDMA1 region is further divided into a specific number of intervals of the same size, which are defined as M1, M2, and M3, respectively. Therefore, the management information (TLI) of the present invention is a portion indicating the position of the TDMA currently being used (referred to as "first management information (TLI 1)"), and a portion indicating a specific section in the extended TDMA1 (this "Second management information (TLI 2)").

That is, as the size of TDMA1 is significantly larger than that of TDMA0, if simply using "first management information (TLI 1)" to indicate that TDMA1 is currently in use, the TDMA1 is similarly scanned from the beginning and finally recorded. Since the location needs to be confirmed, a problem requiring a long access time eventually occurs. In the present invention, the extended TDMA1 is further divided into a plurality of sections, and when the corresponding section is completed, the second management information ( TLI 2) "can be used to further reduce access time.

In FIG. 9A, an extended TDMA1 is divided into three equal-size periods M1, M2, and M3, and two clusters are allocated for recording "second management information TLI2." For example, if the extended TDMA 1 is divided into m equal-size intervals (M1, M2, ..., Mm), the (m-1) number is used to record the "second management information (TLI 2)" from this. It should be obvious that the cluster should be allocated.

FIG. 9B shows the structure of the management information TLI of the present invention when the TDMA1 extended as shown in FIG. 9A is divided into three equal size sections M1, M2, and M3, and the management information TLI. Is recorded in a specific management area as shown in Figs. 5 to 7, but is shown by way of example when it is located at the end of TDMA0 for convenience of explanation.

Accordingly, the first management information TLI 1 is configured as one cluster and the second management information TLI 2 is configured as two clusters, so that the management information TLI of three clusters is provided.

FIG. 10A illustrates a dual layer disk structure according to an extended spare area. In the case of a dual layer, the spare area existing at the end of the user data area is an inner spare area (ISA1) of the second recording layer. Since the spare area ISA1 is allocated within 50% of the maximum disk recording capacity, and the spare area ISA1 is expanded, the TDMA4 existing in the spare area ISA1 is also expanded. .

When TDMA4 is extended to a specific size as described above, the TDMA4 region is further divided into a specific number of intervals of the same size, which are defined as N1, N2, ..., N5, respectively. Therefore, the management information (TLI) of the present invention is composed of four clusters of the first management information (TLI 1) indicating the position of the TDMA currently being used, and the second management information (TLI) indicating a specific section in the extended TDMA4. 2) shows a case composed of four clusters.

Similarly, as described above in FIG. 9A, if the extended TDMA 4 is divided into n equal-sized intervals (N1, N2, ..., Nn), the " second management information (TLI 2) " It is obvious that (n-1) clusters should be allocated.

FIG. 10B shows the structure of the management information TLI of the present invention when the extended TDMA1 is divided into five equal size sections N1, N2, ..., N5 as shown in FIG. 10A. The location where the information TLI is recorded will be in a specific management area as shown in Figs. 5 to 7, but is shown by way of example when it is located at the end of the TDMA0 for convenience of explanation (Fig. 5).

Accordingly, the first management information TLI 1 is configured as four clusters, and the second management information TLI 2 is also configured as four clusters, so that the management information TLI of eight clusters is provided.

11A and 11B show an example of the method of recording the management information (TLI) of the present invention according to the situation in which the actual TDMA is recorded in Figs. 10A and 10B.

That is, FIG. 11A shows a case where the current disk has finished using TDMA0, TDMA1, TDMA2, and TDMA3 and is using a specific section of the last TDMA4, for example, an N3 section.

When the TDMA is used as shown in FIG. 11A, a method of recording management information (TLI) of the present invention for managing the same will be recorded as shown in FIG. 11B.

That is, since TDMA0, TDMA1, TDMA2, and TDMA3 have been used and the last TDMA4 is being used, all four clusters of the first management information TLI 1 are changed to the recording state. In addition, in the TDMA4 currently in use, the sections N1 and N2 are completed, and finally, when the current location is present in the N3 section in TDMA4, the first and second clusters in the second management information TLI2 are recorded. By changing to the state, it indicates that the N3 section is in use.

12 is related to the disk initialization method of the present invention, which is determined at the time of initializing the first embodiment (Normal Spare Area allocation) and the second embodiment (Expand Spare Area allocation) and managing the present invention according to the determined method. The size of the information TLI is allocated.

In other words, when the disk is initialized, the user or the system determines the spare area mode (120). If the spare area mode is the "Normal" mode, one or more sizes (x-1) than the allocated TDMA number (x) are determined. TDMA management information (TLI) is allocated (121). If the spare area mode is the "Expand" mode, the size of the TDMA existing in the extended spare area and the extended spare area is determined and allocated (122). After dividing the determined extended TDMA size into a specific number y of equal size intervals, TDMA second management information TLI 2 is allocated to a size y-1 less than the divided specific number y. (122). In this case, the TDMA first management information TLI 1 is allocated with a size (x-1) one less than the allocated number of TDMAs (x) (122).

FIG. 13 relates to an optical disc recording and reproducing apparatus to which the present invention is applied. The recording and reproducing apparatus includes a recording and reproducing unit 10 for performing recording and reproducing on an optical disc, and a control unit 20 for controlling the same. The recording and reproducing unit 10 issues a recording or reproducing command to the specific area, and the recording and reproducing unit 10 performs recording and reproducing to the specific area according to the command of the control unit 20. The recording and reproducing section 10 may be considered as an "optical drive".

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.

In the above optical recording and reproducing apparatus, a disc recording and reproducing method using the management information (TLI) of the present invention will be described in detail.

When the optical disc is loaded, the recording / reproducing section 10 should acquire various disc information recorded from the loaded optical disc. In particular, if the loaded optical disc is an optical disc capable of recording once, for example, a BD-WO, the recording / reproducing The microcomputer 16 in the section 10 is the management information of the present invention defined in the standardized position in the management area to confirm the position of the TDMA currently in use on the disc and the position last recorded in the TDMA currently in use. The recording state of the TLI is confirmed.

Therefore, after confirming the location of the TDMA currently being used, the TDMS information obtained by scanning from the beginning of the corresponding TDMA is obtained, and a part of the obtained TDMS information is transmitted to the control unit 20 and then transmitted from the control unit 20. By using the TDMS information, the recording and reproducing unit 10 transmits a command for performing recording and reproducing to the recording and reproducing unit 10, whereby the recording and reproducing by the recording and reproducing unit 10 is performed.

In addition, the method of recording the management information (TLI) of the present invention in the above optical recording and reproducing apparatus will be described in detail as follows.

The microcomputer 16 in the recording / reproducing section 10 records the TDMS information in a specific order of use in a plurality of TDMAs whose use is determined in a specific order. For example, the use of the TDMA0 is started. Upon completion, TDMA0 is used through the pickup unit 11 to control the change of a specific cluster in the TLI to the recording state to indicate that TDMA1 is currently in use.

Of course, the above operation is in the idle state after the completion of the recording process of the disk, or at the time of ejecting the disk, the microcomputer 16 checks the position of the TDMA currently being used, and then in the corresponding TLI. It is also possible to change a specific cluster into a batch recording state.

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 has the advantage of further improving the use efficiency of a write once optical disc utilizing TDMA by reducing the access time to the position of the TDMA currently being used in the write once optical disc.

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

2A and 2B show a disc structure of an optical disc of write once type of the present invention,

3 shows, for example, information recorded in a temporary disk management area (TDMA) of the present invention;

4A to 4C show a first embodiment of recording the TDMA management information (TLI) of the write once optical disc of the present invention;

5 to 7 show an example where the TDMA management information (TLI) of the writeable optical disc of the present invention is recorded, for example.

8 shows information recorded in the TDMA management information (TLI) of the present invention;

9A to 11B show a second embodiment of recording TDMA management information (TLI) of a write once optical disc of the present invention;

12 illustrates an initialization method according to the spare area allocation mode of the present invention.

Fig. 13 shows a recording / playback apparatus of a write once optical disc of the present invention.

-Explanation of Reference Numbers-

10: recording and playback section 20: control section

11: pickup unit 16: microcomputer

Claims (21)

In a write once optical disc having a plurality of temporary disc management areas (TDMAs), The plurality of temporary disk management areas (TDMAs) are used in a specific order. The management information recording method of a writeable optical disc, characterized in that for recording the management information indicating the position of the temporary disk management area (TDMA) currently in use among the plurality of temporary disk management areas (TDMA) in a specific area of the disk. . The method of claim 1, The management information is recorded in an area provided with the number of clusters (n-1 clusters) smaller than the number n of temporary disk management areas (TDMA) existing in the disk. How to record management information. The method of claim 2, And said management information records a corresponding cluster when use of a specific temporary disk management area (TDMA) is completed. The method of claim 1, And said management information is recorded in a temporary disk management area (TDMA0) used first. The method of claim 4, wherein And said management information is recorded at the end of the temporary disk management area (TDMA0) to be used first. The method of claim 1, And the management information is recorded in the disc inner management area. The method of claim 1, And said management information is recorded in a defect management area (DMA). The method of claim 1, And wherein said writeable optical disc has two recording layers (Dual Layer). The method of claim 8, And a total of five temporary disk management areas (TDMA0 to TDMA4) exist in the two recording layers (Dual Layer). The method of claim 9, And a four cluster size management information recording area for indicating the use state of the five temporary disk management areas (TDMA0 to TDMA4). The method of claim 10, And an area for recording the management information is provided in the first temporary disk management area (TDMA0). In a write once optical disc having a plurality of temporary disc management areas (TDMAs), The plurality of temporary disk management areas (TDMA) are used in a specific order, and the last used temporary disk management area (TDMA) is used as an extended temporary disk management area (TDMA), First management information indicating a position of a temporary disk management area (TDMA) currently in use among the plurality of temporary disk management areas (TDMAs), and an area currently in use in the extended last temporary disk management area (TDMA); And recording the second management information to be displayed in a specific area within the disc. The method of claim 12, The first management information is recorded once in an area provided by the number of clusters (x-1 cluster) smaller than the number x of temporary disk management areas (TDMA) existing in the disk. Method for recording management information on an optical disc. The method of claim 12, The second management information is recorded in an area provided with at least one cluster size (y-1 cluster) size than the number y of dividing the size of the last temporary disk management area (TDMA) into the same size. A management information recording method for a write once optical disc. The method according to claim 13 or 14, An area for recording the first management information and the second management information is provided adjacent to each other and is provided in the first temporary disk management area (TDMA0). In the initialization method of a write once optical disc, Determine the allocation mode of the spare area, According to the determined spare area allocation mode, the allocation size of the last used temporary disk management area (TDMA) is determined, According to the size of the determined last temporary disk management area (TDMA), the recording is characterized in that the size of the area for recording management information indicating the position of the temporary disk management area (TDMA) currently in use is determined and allocated. Possible method of initialization of optical disc. In the initialization method of a write once optical disc, Determine whether to allocate an extended spare area including a temporary disk management area (TDMA), When extending the spare area, the allocation size of the spare area and the allocation size of the temporary disk management area (TDMA) included in the spare area are determined. First management information indicating a position of a temporary disk management area (TDMA) currently being used in the temporary disk management area (TDMA) in consideration of the determined size of the temporary disk management area (TDMA); A method for initializing a writeable optical disc, characterized in that the size of the area for recording the second management information indicating the area currently being used in the disk management area (TDMA) is determined and allocated. In an optical disc having a management area and a data area, An area in which the plurality of temporary disk management areas (TDMAs) are allocated is provided in the optical disc, and the order of use of the plurality of temporary disk management areas (TDMAs) is determined in a specific order. And an area in which management information indicating a position of a disc management area (TDMA) is recorded. The method of claim 18, The area in which the management information is recorded includes an area for recording first management information designating a temporary disk management area (TDMA) currently being used, and a section for indicating a section currently being used within the last temporary disk management area (TDMA). 2. An optical disc of write once type, comprising an area for recording management information. When the optical disc is loaded, checking information indicating a temporary disc management area (TDMA) in which final temporary disc definition structure (TDDS) information is recorded; Identifying final Temporary Disk Definition Structure (TDDS) information in the temporary disk management area indicated by the information; And reproducing information necessary for recording and reproducing the disc by using the checked temporary disc definition structure (TDDS) information. A pickup section for recording information in the disc, Records temporary disk management structure (TDMS) information in a plurality of temporary disk management areas (TDMAs) determined to be used in a specific order, and when recording of a specific temporary disk management area (TDMA) is completed, manages specific temporary disks through the pickup unit. An optical recording / reproducing apparatus for a once-recordable optical disc, characterized in that it comprises a microcomputer for controlling recording on the disc management information indicating that recording of the area (TDMA) has been completed.