JP2007265605A - Recording medium having data structure for managing at least data area of recording medium, and recording and reproducing method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording medium having data structure for managing data area of the recording medium, and a reproducing method and an apparatus. <P>SOLUTION: The data structure on the recording medium includes a temporary defect management area storing a data block. The data block includes temporary definition structure. The temporary definition structure indicates a recording mode of the recording medium. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording medium having a data structure for managing at least a data area of the recording medium, and a method and apparatus for recording and reproduction.

  Standardization of new high-density read-only and rewritable optical discs capable of recording large amounts of data is rapidly progressing, and products related to new high-density optical discs are expected to be commercially available soon. . For example, Blu-ray Disc (BD), which belongs to next-generation HD-DVD technology, is a next-generation optical recording solution that far exceeds the recording capacity of existing DVDs.

  Blu-ray discs are written and read using a blue-violet laser with a wavelength of 405 nm, which is much denser than the red laser with a wavelength of 650 nm used for current DVDs. A much larger amount of data can be stored on the BD.

  At least one standard related to BD (Blu-ray Disc) such as rewritable Blu-ray Disc (BD-RE) has been developed, and write-once Blu-ray Disc (BD-WO) Other standards are still under development. Standards such as BD-RE provide a data structure for managing defects in the data area of a recording medium. However, BD-WO presents a problem that current BD standards such as BD-RE do not face because of the one-time nature of recording, and an efficient data structure and method for managing defects is BD. -The WO standard is still under development.

  The recording medium according to the present invention includes a data structure for managing at least one data area of the recording medium.

  In one embodiment, a temporary defect management area of the recording medium stores data. This data block includes a temporary definition structure (temporary definition structure), and the temporary definition structure indicates a recording mode of the recording medium. For example, the recording mode can be one of sequential recording and random recording.

  This data block can also include usage state information of the data area of the recording medium. This usage state information provides information regarding the use of a data area for storing data. When the recording mode is sequential recording, the data block provides information regarding a continuous recording area in the data area of the recording medium. When the recording mode is random recording, the data block includes a space bitmap indicating the recording status of the data area of the recording medium.

  Another embodiment of the present invention provides a method for formatting a write-once recording medium. In this method, input related to a desired recording mode of the recording medium is received, and an indicator of the desired recording mode is recorded in a temporary definition structure in the temporary defect management area of the recording medium. For example, the desired recording mode can be one of a sequential recording mode and a random recording mode. The method further includes sequentially recording information in the temporary defect management area when the recorded recording mode indicator indicates the sequential recording mode. The sequential recording information provides information regarding the continuous recording area in the data area of the recording medium. The method also further includes recording a space bitmap in the temporary defect management area when the recorded recording mode indicator indicates a random recording mode. The space bitmap provides information regarding the recording state of the data area of the recording medium when the recorded recording mode indicator indicates the random recording mode.

  A further embodiment of the present invention provides a method for recording management information on a write-once recording medium. In this embodiment, the recording mode indicator is reproduced from the temporary definition structure in the temporary defect management area of the recording medium, and the recording mode of the recording medium is determined based on the recording mode indicator. Then, the usage status information of the recording medium is recorded in the temporary defect management area based on this determination step. The usage state information provides information regarding the use of the data area of the recording medium that stores data.

  A further embodiment of the present invention provides a method for recording management information on a write-once recording medium. In this embodiment, the usage status information is updated by recording updated usage status information in the temporary defect management area of the recording medium when an event occurs. The usage state information provides information regarding the use of the data area of the recording medium that stores data.

  In another embodiment of the present invention, the temporary defect management area of the recording medium stores a plurality of defect lists of various sizes. Each defect list indicates a defect in the data area of the recording layer of the recording medium when the defect list is recorded. The temporary defect management area also stores a plurality of fixed size temporary definition structures. Each temporary definition structure provides usage state information regarding the data area of one layer of the recording medium when the temporary definition structure is recorded.

  A further embodiment of the present invention provides a method for recording management information on a write-once recording medium. In this embodiment, at least one defect list is recorded in the temporary defect management area. This defect list lists defects in the data area of the recording layer of the recording medium. The recorded defect list contains new defects compared to the previously recorded defect list, so that the recorded defect list and the previously recorded defect list have different sizes. This embodiment further includes recording at least one temporary definition structure in the temporary defect management area. Each temporary definition structure provides usage state information regarding the data area of one layer of the recording medium when the temporary definition structure is recorded. This recorded temporary definition structure consumes the same amount of space on the recording medium as the previously recorded temporary definition structure.

  A further embodiment of the present invention provides a method for recording management information on a write-once recording medium having a temporary defect management area in which at least one temporary definition structure associated with each recording layer of the recording medium is stored. Each temporary definition structure includes usage state information that provides information regarding the use of a data area in an associated recording layer that stores data. The method includes recording the most recent temporary definition structure associated with each recording layer in a defect management area of the recording medium.

  The present invention further provides an apparatus and method for recording and reproducing a data structure according to the present invention.

  The above features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

  In order that the present invention may be fully understood, embodiments of the present invention will be described with reference to the accompanying drawings. For convenience, a write-once Blu-ray disc is used as an example of a write-once disc in this embodiment.

<Data structure of recording medium>
1 and 2 show the data structure of a write-once optical disc, and more specifically, management information according to an embodiment of the present invention.

  The structure of the write-once optical disc shown in the figure is described in detail in Korean Patent Application No. 2003-15634.

  As illustrated, the write-once optical disc in this example is a single-layer disc having one recording layer. This disk includes a spare area (ISA0 / OSA0) for recording data that cannot be recorded in the main data area due to a defect in the main data area (for example, a physical defect). Information for managing replacement of a defective portion of data with a spare area portion is recorded on a temporary defect management area (TDMA).

  In general, a rewritable optical disc as opposed to a one-time writable disc has a limited DMA because data can be repeatedly written to and erased from a defect management area (DMA). A write-once optical disc requires more space to manage defects because data is written only once and cannot be erased. Therefore, TDMA is used to record this information because the defect management information changes during use of the optical disc. When the disc is completed, the last version of the defect management information is copied from the TDMA on the write-once optical disc to the DMA.

  Referring to FIG. 1, TDMA includes TDMA1 allocated to a lead-in area having a fixed size and TDMA allocated to a spare area OSA0. The TDMA has a size that is linked to the size of the spare area. For example, the size of the spare area OSA0 is N × 256 clusters, and the TDMA2 forms a P cluster. The number P of clusters is determined according to P = (N × 256) / 4. In each TDMA, temporary defect management information in the form of a temporary defect list (TDFL), temporary disk definition information (TDDS), and disk use state information can be recorded.

  As described above, when the defective area exists in the data area, the spare area (ISA0 / OSA0) replaces the defective area. The TDFL provides information for managing this process in the form of a list. For example, this list shows a defective area and a spare area that replaces the defective area. According to one embodiment of the present invention, the size of the TDFL varies between 1 and 4 clusters depending on the amount of information in the TDFL. In contrast, according to one embodiment of the present invention, the amount of space dedicated to TDDS remains fixed at one cluster. According to an embodiment, this data block includes TDDS and disk usage information, as will be described in detail with reference to FIGS. 2, 5A-5B, and 7A-7B. As will be described in more detail below, the disc use state information can be sequentially recorded information (for example, track information) or space bitmap (SBM) depending on the recording mode of the write-once optical disc.

  First, referring to FIG. 2, the disc management information of a conventional rewritable optical disc will be compared with the contents included in the TDDS of the present invention.

  In the case of a rewritable optical disk, the DDS consumes a very small portion of a disk of about 60 bytes per cluster (one cluster has 32 sectors). The remaining area of this cluster is set by “zero padding”. However, in this embodiment of the present invention, in addition to the area (60 bytes) used for the conventional rewritable optical disk, the remaining area is used as disk management information. Therefore, in the TDDS of the present invention, not only the DDS used in the existing rewritable optical disc but also information peculiar to the write once optical disc is sequentially recorded in one sector (2048 bytes). For example, the information specific to the write-once optical disc includes a recording mode indicator that indicates the recording mode of the recording medium from a plurality of possible recording modes. Multiple recording modes and recording mode indicators will be discussed in detail below. This information can also include location information of the last TDFL.

  As shown in FIGS. 1 and 2, the disk usage state information (for example, as described in detail below, depending on the recording mode of the recording medium, sequential recording information such as track information or space bitmap information) Recording is performed on the remaining 31 sectors of one cluster including the TDDS. Alternatively, the disk usage status information can be configured in 31 sectors before the TDDS, and the TDDS can be configured in the last 32 sectors. Disc usage information varies depending on the user's use of the disc and provides information that can be used to accurately search for additional recordable areas through the classification of recorded / unrecorded area information, as discussed in detail below. To do.

  Accordingly, the TDDS used in this disclosure should be interpreted broadly as described above and should not be interpreted as a term defined by one particular standard.

<Recording mode and initialization method>
FIG. 3 shows an optical disc initialization method based on a recording mode according to an embodiment of the present invention.

  As described above, the present invention is also intended to support various recording methods for a write-once optical disc, and this method includes a “sequential recording mode” and a “random recording mode”. ) ”.

  The “sequential recording mode” includes a DAO (Disc At Once) mode for recording the entire disc at one time and an incremental recording mode for sequentially recording information in a continuous recording area of the disc. Is a recording mode including In the sequential recording mode of the present invention, the number of additional recordable areas on the disc is not limited in the incremental recording mode. Continuous recording in which data is sequentially recorded is referred to as a track at the time of the conference, and sequential recording information can be referred to as track information. This track information will be discussed in detail below.

  The “random recording mode” is a recording mode that enables free recording over the entire area of the disc. That is, this mode does not limit the order of recording data in the recording area of the disc. Here, the space bitmap (SBM) is used as disc usage status information indicating the recording status of the disc. This SBM will be discussed in detail below.

  The present invention supports multiple recording modes as described above, and when a write-once disc is used for the first time, the recording mode is determined and the disc is initialized for that recording mode. That is, the user, the manufacturer of the disc, or the host (hereinafter collectively referred to as “host”) determines the recording mode of the disc and sets the recording mode in the designated management area of the disc. Specifically, when the host inputs the recording mode of the disk, the disk recording system sets 1 byte in the TDD to indicate the recording mode, and determines the format of the disk usage status information associated with the recording mode. For example, if the recording mode is the sequential recording mode, the system sets the recording mode to “0000 0000b” and sets “track information” as the usage state information. If the recording mode is the random recording mode, the system sets the recording mode to “0000 0001b” and sets “SBM” as the usage state information. Therefore, when the disc is used later, the system records data on the disc according to the determined recording mode, and updates one of the corresponding usage state information as the disc management information.

  As a result, when initialization is completed and a disk write-once type is loaded, the system first determines the recording mode of the corresponding disk, and determines one of a plurality of disk usage status information according to the recording mode determination. The usage status information determined in the disk management area set in the corresponding disk is updated.

  Hereinafter, a detailed structure and recording method of “track information” and “SBM” managed in association with a TDDS recording mode will be described, and a method of recording TDDS and TDFL in TDMA and DMA will be described.

<Type of track>
With reference to FIG. 4, the track type and physical structure of a disk according to an embodiment of the present invention will be described. A continuous recording area in which data is sequentially recorded is called a track. FIG. 4 shows various types of basic tracks of a write-once optical disc according to an embodiment of the present invention. Specifically, FIG. 4 shows a plurality of continuous recording areas or tracks having various states assuming use between write-once discs for a certain period. As shown in the figure, tracks 1 and 2 correspond to open tracks that store data in their head areas, each having a later area where additional recording is possible. Tracks 3 and 4 correspond to complete or closed tracks that are completely filled (track 4) or closed for further recording (track 3). When track 3 is closed by track 3 so that no further recording into the track is allowed, as shown, the unrecorded area is padded with “zero” (the hatch in FIG. 4). The track 3 is different from the track 4 in this respect).

  The track 5 provides an example of the last track including an area where additional recording is possible. This track is called an intermediate track. Accordingly, there are three types of tracks: open, closed, and intermediate.

  Each of the tracks has the last recorded address (LRA) regardless of the type of track. LRA is the last address at which actual data is recorded on the track. Thus, for track 3, the position (or address) before track 3 is padded with zeros is the track 3 LRA. More specifically, assuming that the unit for recording data on the optical disk is a cluster, if there are 32 sectors in one cluster and there are fewer than 32 sectors in it, the remaining sectors are padded with zeros. The The last sector address before padding is LRA. For each of the open and intermediate tracks other than the closed track, a next writable address (NWA) indicating the next address where data can be written can be determined. The NWA is obtained from the LRA as the next sector address following the LRA.

<Data structure of track information on recording medium>
First, the present invention does not limit the number of open tracks. Therefore, there may be a plurality of open tracks and completion tracks. The present invention provides a data structure on a recording medium for efficiently managing this potential. As shown in FIG. 5A, the recording mode indicator in the TDDS indicates the sequential recording mode, and the disk use state information is track information. An example of a track information data structure is described in detail with respect to FIG. 5B.

  As shown in the figure, sequential recording, more specifically, track information includes three parts: a header to indicate that the data structure provides track information, a track information list providing track information, and A terminator indicating the end of track information.

  The header is arranged at the head portion in the track information, includes a “track information structure identifier” field, and indicates that information following this identifier is track information. The next indicator “track information format” indicates track information. This is followed by a “layer number (0 or 1)” field representing the recording layer corresponding to the track information. The example so far has been for a single-sided recording layer write once optical disc, but the optical disc can also have multiple recording layers and / or double-sided.

  The header includes a “total number of tracks” field that represents the number of tracks in the data area of the recording layer corresponding to the track information, and a “total number of open tracks” field that represents the number of open tracks in the data area. Before reading the track information list, the total track information can be confirmed.

  The track information list is recorded after the header, and a track information list terminator, which will be described in more detail below, indicates the end of the track information. Therefore, the track information includes a continuously recorded header, a track information list, and a terminator.

  An example of the track information list will be described in more detail. The track information list includes one entry for each track in the corresponding data area of the disc. Each entry is allocated, for example, 8 bytes. This track information entry includes track state information, first address information of the corresponding track, and address information recorded at the end of the track.

  The track status information indicates the type of track (ie, open, closed, intermediate) and can be represented by 4 bits as shown in FIG. 3B. In this embodiment of the present invention, an open track on which additional recording is possible is indicated by “0000b” as track state information. The intermediate track is indicated by “0001b” as the track state information, and the completed track for which additional recording is not permitted is indicated by “1000b” as the track information. The track status information is represented as specific bits, as described above, to help sort the track information list entries described later in this disclosure.

  In the example shown in FIG. 5B, the first address information of the entry is a “track start PSN (physical sector number)” field. This field provides the sector address of the first sector forming the track. The last recorded address information in the example shown in FIG. 5B is the LRA of this track. Therefore, by reading one entry, the track type, start position, and LRA of the track can be determined.

  The track state information in each entry can include a session start bit (eg, one of the bits in the track state information can be used as session start information). The session state indicates whether the track is the first track in the session. Here, clustering into track groups is called a session.

<Space bitmap structure and recording method>
FIG. 6 illustrates the direction in which different areas of the optical disc are recorded. This description will be helpful in understanding the data structure of the SBM described below in connection with FIGS. 7A and 7B.

  Although FIG. 1 shows an example of a single-layer optical disc, the BD-WO may have a plurality of recording layers. Thus, the aspect of the single-layer optical disc according to the present invention can be applied to both layers. For the purpose of explanation, FIG. 6 schematically shows areas of a plurality of layers in an optical disc write-once type such as BD-WO.

  In the BD-WO shown in FIG. 6, first and second recording layers Layer 0 and Layer 1 (hereinafter referred to as “L0” and “L1”) can exist. Each recording layer includes an inner area, an inner spare area, a user area, an outer spare area, and an outer area. In the case of a two-layer disc, the inner area of the first recording layer L0 becomes a lead-in area, and the inner area of the second recording layer L1 becomes a lead-out area. However, in the case of a single layer disc, the outer area becomes the lead-out area.

  FIG. 6 shows that the first recording layer L0 is used from the inner periphery to the outer periphery, and only the outer spare area OSA0 is used from the outer periphery to the inner periphery. The second recording layer L1 is used from the outer periphery to the inner periphery, and only the inner spare area ISA1 is used from the inner periphery to the outer periphery. Therefore, the start position of each area is determined according to the direction of use of the area. However, this only corresponds to the usage efficiency of the disk. If the direction of use of each area changes, the start position of that area also changes.

  In the state where the use direction and the start position of each area of the disc are defined as described above, a method for indicating the SBM that changes depending on the use state of the disc will be described in detail below.

  As shown in FIG. 7A, the recording mode indicator in the TDDS indicates the random recording mode, and the disc use state information is SBM. FIG. 7B shows an example of the data structure of the SBM. As shown, the SBM includes three parts: a header that allows the SBM to be recognized, an SBM information that directly indicates the SBM, and an SBM terminator that indicates the end of the SBM.

  The header includes a recording layer information field and a format version field in addition to indicating this information field as SBM. The recording layer information field indicates which recording layer (for example, layer number 0 or 1) is associated with the SBM. The format version field indicates which format version the SBM conforms to.

  As shown in FIG. 4B, the SBM information is prepared for each divided area of the disk, and whether or not to update the SBM is determined by a user, a disk manufacturer, or a host (hereinafter collectively referred to as a host). You can decide as needed. Specifically, the SBM information part includes start position information (Start Cluster First PSN) of each area, length information of the corresponding area, and bitmap data for each area. In one embodiment, the bitmap information is updated only when start position information and length information are set. This method is called an SBM on / off function, and is for actively responding to various requests of the host. In the case of BD-WO, defect management may not be performed when the usage environment supports real-time recording. In this case, the spare area is not allocated, and it is not necessary to update the SBM of the corresponding area.

  Also, in one specific case, only the user area, which is the area where the actual user data is recorded, is managed by the SBM, and the SBM is not updated for changes to other areas. Operating according to this embodiment is beneficial because if the SBM is updated whenever management information is changed, frequent updates to the SBM may be required. This embodiment can prevent the available TDMA area on the disk from being used up immediately. Therefore, when it is desired to perform the SBM update of the user data area using only the SBM on / off function and not update the remaining area, the start position information and the length information of the other areas are set to specific values, for example, “ Set to zero value.

  As can be appreciated, with each update of the SBM, a new SBM + TDDS data block is recorded in the TDMA, where the SBM provides a cumulative indication of the recording status of the disc. Thus, with each update of the SBM, the TDDS is updated to indicate, among other things, the new location of the SBM.

<Track information update method>
When to update the disk usage information can be a design parameter established by the system or system designer. However, examples of events that trigger updates are described in detail below.

  When a new track is generated or when the track is closed in the sequential recording mode, the track information is newly generated, so that the track information can be updated. Similarly, the SBM is updated when a new recordable area is changed during random recording. Also, when the disk is removed from the driver or the driver is turned off, the use of the disk is at least temporarily suspended. At these times, “track information” is updated.

<TDMA and DMA recording method>
FIGS. 8 and 9 show embodiments of the TDMA and the method of recording information in the DMA according to the present invention, respectively. FIG. 8 shows a method of recording the TDDS information, the disk usage status information, and the TDFL information during the use of the disc in the TDMA, and FIG. 9 shows the last or last recorded in the TDMA when the disc is terminated. It shows how to transfer the latest version of information to DMA.

  FIG. 8 shows only the case of TDMA1 existing in the lead-in area. However, it will be apparent that this method can also be performed with TDMA existing in other areas of the disc. In accordance with the present invention, TDFL and TDDS are recorded in TDMA through the following method.

  The TDFL is recorded and managed in the order in which defect areas occur regardless of the recording layer, and has a variable size. That is, when recording exceeds cluster 1 due to an increase in defect area, the size of TDFL may increase in the range of 1-8 clusters. The number of clusters is obtained taking into account the total disc capacity when multi-layer BD-WO is applied (eg, 4 clusters for a single recording layer disc and 8 clusters for a dual recording layer disc).

  Next, the TDD having a fixed size is recorded and managed by dividing it into a plurality of recording layers. That is, the TDDS of each recording layer is recorded alternately after TDFL as shown in FIG. This corresponds to the fact that “track information” and “SBM” recorded together with the TDDS are divided and recorded in the respective recording layers. In TDDS, an area is allocated to record “the newest TDFL position information (4 bytes)” and “the newest TDDS position information (4 bytes) of other recording layers” in the area. The above information is updated whenever the TDDS is updated. In this way, by reading the last recorded TDDS information (regardless of the recording layer), all information related to the corresponding disc, for example, the disc recording mode, the latest usage status information (track information or SBM), the most The new TDFL position information and the newest TDDS position information of other recording layers are confirmed to realize efficient management of the disc.

  FIG. 9 shows data recording for only DMA1 and DMA2 existing in the lead-in area. However, it will be apparent that this recording method can also be performed with a DMA present in another area of the disc.

  First, recording to DMA is done when no further recording is possible (this can happen when TDMA or the spare area is full) or when the user optionally exits the disc There is. The content recorded in the DMA is the final TDDS (with disc usage status information) / TDFL information in TDMA. This information is transferred as DDS / DFL to DMA. Therefore, the TDDS / TDFL information is recorded in the DDS / DFL because there is no change in the recorded content. DDS / DFL means the final recording of a disk in DMA, and has the same structure and content as TDDS / TDFL.

  According to the present invention, DDS and DFL are recorded through the following method.

  The DMA according to an embodiment of the present invention includes 64 clusters in the case of a plurality of recording layers. The eight preceding clusters provide an area for recording DDS information, and the remaining 54 clusters provide an area for recording DFL information.

  The DDS in the DMA has the same structure as the TDDS. In the upper sector 1 of the cluster 1 of the DDS, an area for recording the same information as that used in the BD-RE and information used only in the BD-WO (for example, disc recording mode, latest use state information (track information Or SBM), the latest TDFL position information, the latest TDDS position information of other recording layers, etc.) are provided. In the remaining 31 sectors, “track information” or “SBM” determined in association with the recording mode as the disk use state information is divided and recorded in the respective recording layers.

  Further, the sequential recording is performed in the order of the TDDS of the first recording layer (L0 TDDS) and the second recording layer (L1 TDDS), and the repeated recording is performed in the second recording layer (L1 TDDS) and the second recording layer. It is performed in the order of TDDS of one recording layer (TDDS of L0). This recording method takes into account the actual structure of the disk and provides for the possibility of DMA information being damaged due to the scratch direction (mainly the horizontal direction) of the disk.

  Also, the DMA DFL has the same contents as the final TDFL, and the TDFL is recorded using a maximum of 8 clusters, so that repeated recording is performed as many times as required by the system. At this time, the maximum number of repetitions is seven.

  As described above, the method of recording optical disc write-once management information according to the present invention enables selective recording of disc usage status information (“track information” and “SBM”) according to a determined recording mode, Enables efficient recording of TDMA and DMA information, thus achieving efficient and continuous disk use.

  FIG. 10 is a schematic diagram showing an embodiment of an optical disk recording and reproducing apparatus according to the present invention. As illustrated, the encoder 9 receives and encodes data (for example, still image data, audio data, video data, etc.). The encoder 9 outputs the encoded data together with coding information and stream attribute information. The multiplexer 8 multiplexes the encoded data based on the coding information and the stream attribute information to create, for example, an MPEG-2 transport stream. The source packetizer 7 packetizes the transport stream from the multiplexer 8 into source packets according to the audio / video format of the optical disc. As shown in FIG. 10, the encoder 9, the multiplexer 8, and the source packetizer 7 are controlled by the controller 10. The controller 10 receives user commands relating to recording operations and provides control information to the encoder 9, the multiplexer 8 and the source packetizer 7. For example, the controller 10 instructs the encoder 9 on the type of encoding to be performed, instructs the multiplexer 8 regarding the transport stream to be created, and instructs the source packetizer 7 regarding the format of the source packet. The controller 10 further controls the drive 3 to record the output signal from the source packetizer 7 on the optical disc.

  The controller 10 also creates navigation and management information for managing the reproduction of data recorded on the optical disc. For example, the controller 10 controls the drive 3 to record one or more of the data structures shown in FIGS. 1 to 9 on the optical disc, and performs the recording and reproducing methods described above.

  During playback or further recording operations, the controller 10 controls the drive 3 to reproduce this data structure. Based on the information contained in the data structure and the user input received via the user interface, the controller 10 controls the drive 3 to reproduce data from the optical disc as described above and / or to store data on the optical disc. Or record.

  The reproduced source packet is received by the source depacketizer 4 and converted into a data stream (for example, an MPEG-2 transport stream). The demultiplexer 5 demultiplexes the data stream into encoded data. The decoder 6 decodes the encoded data and generates the original data fed to the encoder 9. During playback, the controller 10 controls the operation of the source depacketizer 4, the demultiplexer 5 and the decoder 6. The controller 10 receives a user command related to the reproduction operation, and provides control information to the decoder 6, the demultiplexer 5, and the source depacketizer 4. For example, the controller 10 instructs the decoder 6 on the type of decoding to be performed, instructs the demultiplexer 5 regarding the transport stream to be demultiplexed, and instructs the source depacketizer 4 regarding the source packet format.

  Although FIG. 10 is illustrated as a recording and playback device, it will be understood that a recording only or playback only device can be provided using the portion of FIG. 10 that provides playback or recording functionality.

  Information about the use of a write-once optical disc management data structure and a recording medium for storing data is provided by a method of recording and reproducing the data structure and updating the management data.

The data structure and method for managing at least the data area of the high-density recording medium according to the embodiment of the present invention enables efficient and continuous use of the write-once recording medium such as BD-WO. As is apparent from the above description, the present invention also provides an apparatus for recording a data structure on a high density recording medium that manages at least the data area of the recording medium. Although the present invention has been described with respect to a limited number of embodiments. Those skilled in the art having the benefit of this invention will appreciate numerous modifications and variations therefrom. For example, the Blu-ray write-once optical disc has been described in some examples, but the present invention is not limited to the optical disc of this standard. All such modifications and variations that fall within the spirit and scope of the present invention are contemplated.

1 is a diagram showing a single-layer write-once optical disc according to an embodiment of the present invention. It is a figure which shows the comparison of the disc management information of this invention, and the disc management information of the conventional rewritable optical disk. It is a figure which shows the initialization method of the optical disk based on the recording mode based on one Example of this invention. It is a figure which shows the various kinds of track | truck of the write-once type | mold optical disk based on one Example of this invention. It is a figure which shows the data structure of the write-once type | mold optical disk which concerns on one Example of this invention, specifically, temporary disk management information. It is a figure which shows the data structure of the write-once type | mold optical disk which concerns on one Example of this invention, specifically, temporary disk management information. It is a figure which shows the direction where various area | regions of an optical disk are recorded. It is a figure which shows the case where SBM (Space Bitmap) is recorded on the 31 preceding sector in a cluster, and TDDS (Temporary Disc Definition Structure) is recorded on the remaining sectors. It is a figure which shows an example of the data structure of SBM. FIG. 5 is a diagram showing an embodiment of a TDMA and a method for recording information in the DMA according to the present invention. FIG. 5 is a diagram showing an embodiment of a TDMA and a method for recording information in the DMA according to the present invention. It is a figure which shows one Example of the recording / reproducing apparatus which concerns on this invention.

Claims (26)

A method of recording management information on a recording medium,
Updating the data block including the usage status information by recording the updated usage status information in the temporary management area of the recording medium when the event occurs, wherein the usage status information is stored in the user area of the recording medium; Providing information regarding usage status.   The method of claim 1, wherein the event is that the recording medium is removed from a driver of the recording medium.   The method according to claim 1, wherein the event is creation of a new recording area in a user area.   The method according to claim 1, wherein the event is that a recording area of a user area is changed to a recording completion area.   2. The method according to claim 1, wherein the use state information is one of sequential recording that provides information on a continuous recording area of a user area of a recording medium and a space bitmap that provides information on a recording state of the user area. A method characterized in that The method of claim 1, comprising:
Reproducing a recording mode indicator indicating a recording mode of the recording medium from the temporary management area, wherein the updating step updates the usage state information according to a format related to the recording mode indicated by the recording mode indicator. And how to. An apparatus for recording management data relating to a recording medium,
A pickup for recording data on a recording medium;
A controller that controls a pickup and updates a data block including usage status information by recording updated usage status information in a temporary management area of a recording medium when an event occurs, wherein the usage status information is And a controller for providing information on a use state of a user area of the recording medium.   8. The apparatus according to claim 7, wherein the event is that a recording medium is removed from the apparatus.   8. The apparatus according to claim 7, wherein the event is creation of a new recording area in the user area.   8. The apparatus according to claim 7, wherein the event is that the recording area of the user area is changed to a recording completion area. A method of reproducing data from a recording medium,
Reproducing at least part of the data recorded on the recording medium based on the data block recorded in the temporary management area of the recording medium, wherein the data block is used to indicate a use state of the user area of the recording medium Including state information, wherein the usage state information is updated when an event occurs.   The method of claim 11, wherein the event is that the recording medium is removed from a driver of the recording medium.   12. The method according to claim 11, wherein the event is creation of a new recording area in the user area.   12. The method according to claim 11, wherein the event is that the recording area of the user area is changed to a recording completion area. An apparatus for reproducing data from a recording medium,
A pickup for reading data from a recording medium;
A controller that controls the pickup and reads a data block from the temporary management area of the recording medium, wherein the data block includes a controller including usage status information indicating a usage status of a user area of the recording medium, and the usage status information includes: A device that is updated when an event occurs.   16. The apparatus according to claim 15, wherein the event is that a recording medium is removed from the apparatus.   16. The apparatus according to claim 15, wherein the event is creation of a new recording area in the user area.   16. The apparatus according to claim 15, wherein the event is that the recording area of the user area is changed to a recording completion area. A recording medium,
A temporary management area for storing a data block including usage status information, wherein the usage status information includes a temporary management area for providing information on a usage status of a user area of a recording medium, and the usage status information is an event occurrence A recording medium that is updated when the recording is performed.   20. The recording medium according to claim 19, wherein the event is that the recording medium is taken out from a driver of the recording medium.   The recording medium according to claim 19, wherein the event is creation of a new recording area in a user area.   20. The recording medium according to claim 19, wherein the event is that the recording area of the user area is changed to a recording completion area. A method of recording management information relating to a recording medium having a temporary management area in which usage state information is provided that provides information relating to the use of a user area of a related recording layer for storing data,
A method comprising recording the latest usage state information related to each recording layer in a final management area of a recording medium.   24. The method according to claim 23, wherein the recording step records the latest usage state information related to each recording layer twice or more in the final management area. 24. The method of claim 23, comprising:
The recording medium includes first and second recording layers,
The recording step includes, in sequence, the latest usage state information related to the first recording layer, the latest usage state information related to the second recording layer, and the latest usage state related to the second recording layer. Recording the status information and the most recent usage status information associated with the first recording layer. A recording medium having at least one recording layer,
Temporary management area for storing a plurality of defect lists of different sizes, each defect list is a temporary defect area indicating a defect in the user area of the recording layer of the recording medium when the defect list is recorded,
What is claimed is: 1. A recording medium comprising: a temporary management area for storing a plurality of fixed size use state information relating to a user area of a recording layer of a recording medium when user state information is recorded.

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