WO2004081938A1 - 記録媒体、記録装置、再生装置、記録方法、再生方法 - Google Patents
記録媒体、記録装置、再生装置、記録方法、再生方法 Download PDFInfo
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- WO2004081938A1 WO2004081938A1 PCT/JP2004/003358 JP2004003358W WO2004081938A1 WO 2004081938 A1 WO2004081938 A1 WO 2004081938A1 JP 2004003358 W JP2004003358 W JP 2004003358W WO 2004081938 A1 WO2004081938 A1 WO 2004081938A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10305—Improvement or modification of read or write signals signal quality assessment
- G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
- G11B20/10425—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by counting out-of-lock events of a PLL
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
- G11B20/00115—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers wherein the record carrier stores a unique medium identifier
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1883—Methods for assignment of alternate areas for defective areas
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
- G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/1075—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data
- G11B2020/10759—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data content data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10898—Overwriting or replacing recorded data
- G11B2020/10907—Overwriting or replacing recorded data using pseudo-overwriting, i.e. virtually or logically overwriting data on WORM media by remapping recorded blocks to alternate areas
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
- G11B2020/1288—Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B2020/1873—Temporary defect structures for write-once discs, e.g. TDDS, TDMA or TDFL
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/218—Write-once discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/23—Disc-shaped record carriers characterised in that the disc has a specific layer structure
- G11B2220/235—Multilayer discs, i.e. multiple recording layers accessed from the same side
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2541—Blu-ray discs; Blue laser DVR discs
Definitions
- Recording medium recording device, reproducing device, recording method, reproducing method
- the present invention particularly relates to a recording medium such as an optical disk as a write-once bright type medium, and a recording apparatus, a recording method, a reproducing apparatus, and a reproducing method for the recording medium.
- a recording medium such as an optical disk as a write-once bright type medium
- a recording apparatus a recording method, a reproducing apparatus, and a reproducing method for the recording medium.
- optical disks including magneto-optical disks
- CDs Compact Disks
- MDs Mini-Disks
- DVDs Digital Versatile Disks
- An optical disk is a general term for a recording medium that irradiates a disk, which is a thin metal plate protected with plastic, with laser light and reads signals by changes in the reflected light.
- Optical discs include read-only type discs, for example, known as CDs, CD-ROMs, and DVD-ROMs, and MD, CD_R, CD-RW, DVD-R, DVD-RW, and DVD + RW.
- 'Recordable type data can be recorded by using a magneto-optical recording method, a phase change recording method, a dye film change recording method, or the like.
- the dye film change recording method is also called a write-once recording method, which is suitable for data storage and the like because data can be recorded only once and cannot be rewritten.
- the magneto-optical recording method and the phase change recording method can rewrite data. It is used for various purposes such as recording various content data such as music, video, games and application programs.
- data recording / reproducing is performed under the condition of a combination of a laser with a wavelength of 450 nm (a so-called blue laser) and an objective lens with an NA of 0.85, and a track pitch of 0.32 ⁇ m.
- a laser with a wavelength of 450 nm (a so-called blue laser) and an objective lens with an NA of 0.85, and a track pitch of 0.32 ⁇ m.
- a disc with a diameter of 12 cm 23.3 GB (gigabyte) capacity can be recorded and reproduced.
- write-once and rewritable discs have been developed.
- a guide means for tracking data tracks is required.
- a groove (group) is formed in advance as a pre-group, and the group or land (a plateau-like portion sandwiched between the groups) is used as the data h rack.
- this address information may be recorded by making the group move (meander). is there. That is, a track for recording data is formed in advance as, for example, a pre-group, and the side wall of this pre-group is wobbled according to the address information.
- the address can be read from the wobbling information obtained as the reflected light information.
- the address can be read.
- the data can be recorded / reproduced at a desired position without forming the pit data shown on the track in advance.
- the absolute time (address) information represented by such a group subjected to wobbling is called ATIP (Absolute Time In Pregroove) or ADIP (Adress In Pregroove).
- Japanese Unexamined Patent Application Publication No. 2000-520218, Japanese Patent Application Laid-Open No. Sho 60-740, and Japanese Patent Application Laid-Open No. 11-39801 disclose these defects. Management techniques are disclosed.
- optical recording media that can be recorded once, such as CD_R, DVD-R, and even write-once discs as high-density discs, it is naturally not possible to record data in the recorded area. It is impossible.
- the specifications of file systems recorded on optical recording media are defined on the assumption that most of them are used on non-recordable read-only media (ROM type discs) or rewritable media (RAM type discs). .
- the file system for the one-time recording license recording medium has functions. The specifications are limited and special functions are added.
- Write-once media is widely used because it is useful for data storage, etc., but if it can be applied to the above FAT file system, etc. with general specifications, the usefulness of write-once media Will be even higher.
- the recording surface of the disc may be damaged when the optical disc is taken in and out of the disc drive device, or depending on the storage condition and handling of the disc. For this reason, a defect management method has been proposed as described above. Naturally, even write-once media must be able to cope with such flaws.
- the present invention makes it possible to rewrite data in a write-once type recording medium having a plurality of recording layers, and by performing appropriate defect management, the usefulness of the write-in type recording medium is improved.
- the purpose is to further improve.
- the recording medium of the present invention has a plurality of recording layers, and in a write-once recording area where data can be written once in each recording layer, a normal recording / reproducing area for recording / reproducing data; A replacement area for performing data recording by replacement processing according to a defect or data rewriting in the area, a first replacement management information area for recording replacement management information for managing replacement processing using the replacement area, and an update process. There is provided a second replacement management information area for recording the replacement management information (before finalization) in an updatable manner. Further, the data has been written in a predetermined area for each data unit of the write-once recording area. Is written, indicating whether or not the information is written.
- the second replacement management information areas provided in the recording layers are sequentially exhausted as areas for update recording of the replacement management information.
- the write presence / absence indication information is recorded in the second replacement management information area, and the second replacement management information area provided in each recording layer is provided with the replacement management information.
- the second replacement management information area provided in each recording layer is provided with the replacement management information.
- the recording device of the present invention is a recording device for the above-mentioned recording medium, and includes a writing unit for writing data and a control unit.
- the control means writes to the writing means for updating the writing presence / absence indication information in accordance with data writing and writing for updating the replacement management information in accordance with the replacement processing.
- control is performed so that the second replacement management information areas provided in the recording layers are sequentially exhausted as areas for updating.
- the control means may perform writing for updating the write presence / absence indication information in accordance with data writing or writing for updating the replacement management information in accordance with the replacement processing.
- a reproducing apparatus of the present invention is a reproducing apparatus for the recording medium, and includes a reading unit for reading data and a control unit.
- the control unit is configured to control the second replacement management information area provided in each of the recording layers in order of exhaustion in order of the replacement management information and the writing presence / absence indication information.
- Valid replacement management information and write presence / absence indication information are discriminated, and when a data read request is made, the data reading operation by the reading means is controlled based on the valid replacement management information and write presence / absence indication information.
- the recording method of the present invention is a recording method for the recording medium, When performing writing for updating the write presence / absence information in accordance with writing and writing for updating the replacement management information in accordance with the replacement processing, the information is provided in each of the recording layers.
- the second replacement management information area described above is written in such a way that the second replacement management information area is exhausted in order as an area for updating.
- the write presence / absence indication information or the replacement management information contains information indicating the write presence / absence indication information and the replacement management information that are valid in the second replacement management information area.
- the reproduction method of the present invention is a reproduction method for the recording medium, wherein the replacement management information recorded in such a manner that the second replacement management information areas provided in the recording layers are sequentially exhausted.
- valid replacement management information and write presence / absence information are determined from the above write presence / absence information, and data is read out based on the valid replacement management information and write presence / absence information when a data read request is made. Perform the operation.
- a normal recording / reproducing area a spare area, a first spare management information area, and a second spare management information area are provided. Further, write presence / absence indication information is recorded. For example, the writing presence / absence indication information is recorded in the second replacement management information area.
- the second replacement management information area is an area for realizing rewriting of replacement management information by additionally writing replacement management information related to replacement processing.
- the second replacement management information area is provided in each recording layer. Are used in order to update the replacement management information and the writing presence / absence indication information. For example, assuming a two-layer disc, first, in the replacement management information area of the first layer, the replacement management information, the presence / absence indication information for the first layer, and the presence / absence indication information for the second layer are recorded. . The replacement management information, the write presence / absence information for the first layer, and the write presence / absence information for the second layer may be updated at any time due to the progress of the subsequent write operation. Writing is performed in the second replacement management information area in the first layer. If the second replacement management information area in the first layer is exhausted (depleted) from writing for these updates, the second replacement management information area in the second layer is used, Writing for updating is performed. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is an explanatory diagram of an area structure of a disk according to an embodiment of the present invention.
- FIG. 2 is an explanatory diagram of the structure of the single-layer disc according to the embodiment.
- FIG. 3 is an explanatory diagram of the structure of the double-layer disc according to the embodiment.
- FIG. 4 is an explanatory diagram of the DMA of the disk according to the embodiment.
- FIG. 5 is an explanatory diagram of the contents of the DDS of the disk of the embodiment.
- FIG. 6 is an explanatory diagram of the contents of the DFL of the disk of the embodiment.
- FIG. 7 is an explanatory diagram of DFL and TDFL differential list management information of the disk of the embodiment.
- FIG. 8 is an explanatory diagram of DFL and TDFL replacement address information of the disk of the embodiment.
- FIG. 9 is an explanatory diagram of TDMA of the disk of the embodiment.
- FIG. 10 is an explanatory diagram of a space bitmap of the disk of the embodiment.
- FIG. 11 is an explanatory diagram of the TD FL of the disk of the embodiment.
- FIG. 12 is an explanatory diagram of the TDDS of the disk of the embodiment.
- FIG. 13 is an explanatory diagram of I S A and O S A of the disk of the embodiment.
- FIG. 14 is an explanatory diagram of the data recording order in the TDMA of the embodiment.
- FIG. 15 is an explanatory diagram of the use state of the TDMA of the dual-layer disk according to the embodiment.
- FIG. 16 is a block diagram of the disk drive device according to the embodiment.
- FIG. 17 is a flowchart of the data writing process according to the embodiment.
- FIG. 18 is a flowchart of the user data writing process according to the embodiment.
- FIG. 19 is a flowchart of the overwrite function process according to the embodiment.
- FIG. 20 is a flowchart of the replacement address information generation processing according to the embodiment.
- FIG. 21 is a flowchart of the data reading process according to the embodiment.
- FIG. 22 is a flowchart illustrating a TDFL / space bitmap update process according to the embodiment.
- FIG. 23 is a flowchart of the replacement address information reorganization processing according to the embodiment.
- Fig. 24 AB and C are explanatory diagrams of the replacement address information reorganization processing of the embodiment.
- FIG. 25 is a flowchart of the conversion process to the compatible disk according to the embodiment.o Best mode for carrying out the invention
- This optical disk can be implemented as a license type disk in the category of a high-density optical disk system called a so-called Blu-ray disk.
- the optical disk of this example has a diameter of 120 mm and a disk thickness of 1.2 mm. In other words, these points are similar to CD (Compact Disc) type discs and DVD (Digital Versatile Disc) type discs in terms of external shape.
- CD Compact Disc
- DVD Digital Versatile Disc
- NA for example, 0.85
- a high linear density for example, recording linear density of 0.12 / ⁇ m
- Figure 1 shows the layout (area configuration) of the entire disk.
- a lead-in zone, data zone, and lead-out zone are arranged from the inner circumference side.
- the prerecorded information area PIC on the innermost side of the lead-in zone is a read-only area, and the area from the management area of the read-in zone to the lead-out zone is a write-once area in which recording can be performed once.
- a recording track is formed in a spiral shape by an overlapping group (a meandering groove).
- the groove is used as a guide for tracking when tracing with a laser spot, and the group of parentheses is used as a recording track for recording and reproducing data.
- an optical disk on which data is recorded in a group is assumed.
- the present invention is not limited to such an optical disk of group recording, and a land recording method for recording data on a land between a group and a group.
- the present invention can be applied to an optical disc of the type described above, and also to an optical disc of a land group recording system for recording data in groups and lands.
- the group of recording tracks has a meandering shape according to the wobble signal. Therefore, disk drive devices for optical disks In, the two edge positions of the group are detected from the reflected light of the laser spot irradiated on the group, and the fluctuation component of the two edge positions in the disk radial direction when the laser spot is moved along the recording track. By extracting the signal, the wobble signal can be reproduced.
- the wobble signal is modulated by address information (physical address, other additional information, etc.) of the recording track at the recording position. Therefore, the disk drive device can perform address control and the like at the time of data recording and reproduction by demodulating address information and the like from the wobble signal.
- the lead-in zone shown in FIG. 1 is, for example, an area inside a radius of 24 mm.
- a radius of 22.2 to 23.1 mm in the lead-in zone is defined as a prerecorded information area PIC.
- disc information such as recording / reproducing power conditions, area information on the disc, and information on copy protection are recorded in advance as read-only information by group publishing. It is recorded. Note that such information may be recorded by embossing or the like.
- BCA Burst Cutting Area
- PIC pre-recorded information area
- BCA is a record of the unique ID unique to the disc recording medium so that it cannot be rewritten. In other words, by forming the recording marks so as to be arranged concentrically, barcode-shaped recording data is formed.
- a range of a radius of 23.l to 24 mm is set as the management / control information area.
- the control / data area and DMA (Defect A predetermined area format including a Management Area), a TDMA (Temporary Defect Management Area), a test area (OPC), a buffer area, and the like is set.
- management Z control information area In the control data area in the management Z control information area, the following management Z control information is recorded.
- the disc type, disc size, disc version, layer structure, channel bit length, BCA information, transfer rate, data zone position information, recording linear velocity, recording / reproducing laser power information, etc. are recorded.
- a test write area (OPC) provided in the management / control information area is used for trial writing when setting data recording / reproducing conditions such as laser power during recording Z reproduction. That is, it is an area for adjusting recording and reproduction conditions.
- a DMA is provided in the management / control information area, usually in the field of optical discs, a DMA records replacement management information for defect management.
- the DMA records not only the replacement management of the defective part but also management / control information for realizing data rewriting in this write-once disk.
- the management information of I S A and O S A described later is recorded.
- a TDMA is provided.
- the replacement management information is additionally recorded in TDMA and updated.
- the last (latest) replacement management information finally recorded in the TDMA is recorded in the DMA.
- the data zone is the area where user data is actually recorded and reproduced.
- the start address ADdts and end address ADdte of the data zone are indicated in the data zone position information of the control data area described above.
- an ISA Inner Spare Area
- an OSA Outer Spare Area
- IS A and OS A are replacement areas for defects and data rewriting (overwriting) as described later.
- OSA is formed with a predetermined number of cluster sizes from the end position of the data zone to the inner peripheral side.
- the sizes of I S A and O S A are described in the above DM A.
- the section between ISSA and OSA is defined as the user data area.
- This user data area is a normal recording / reproducing area normally used for recording / reproducing user data.
- the position of the user data area that is, the start address ADus and the end address ADue are described in the DMA.
- the outer periphery side of the data zone for example, a radius of 58.0 to 58.5 mm is defined as a lead out zone.
- the readout zone is used as a management Z control information area, and a control data area, a DMA, a buffer area, and the like are formed in a predetermined format.
- control data area for example, various management / control information is recorded in the same manner as the control data area in the lead-in zone.
- the DMA is provided as an area for recording the management information of the ISA and the OSA in the same manner as the DMA in the lead-in zone.
- Figure 2 shows the management Z control information area on a single-layer disc with one recording layer. 2 shows an example of the structure.
- each of the DMA 2, OPC (test area), TDMA, and DMA 1 are formed in the lead-in zone.
- each area of DMA 3 and DMA 4 is formed except for an undefined section (reserve).
- control data area is not shown, it is omitted from the drawing, for example, because a part of the control data area is actually a DMA and the structure related to the DMA is the gist of the present invention. did.
- a TDMA is provided, and the replacement management information is initially recorded using the TDMA, and the replacement management information is additionally recorded in the TDMA as replacement processing occurs due to data rewriting and defects. It will be updated as it goes.
- FIG. 3 shows a case of a two-layer disc having two recording layers.
- the first recording layer is also called layer 0, and the second recording layer is also called layer 1.
- the progress of the physical address value is also in this direction. In other words, layers At 0, the address value increases from the inner circumference to the outer circumference, and in layer 1, the address value increases from the outer circumference to the inner circumference.
- DMA 2 In the layer 0 read-in zone, DMA 2, OPC (test area), TDMA0, and DMA1 areas are formed as in the case of the single-layer disc. Since the outermost side of layer 0 is not a lead-out, it is simply called outer zone 0. Then, DMA 3 and DMA 4 are formed in the outer zone 0.
- the outermost circumference of layer 1 is outer zone 1.
- DMA 3 and DMA 4 are also formed in the outer zone 1.
- the innermost circumference of Layer 1 is a closed door zone. In this readout zone, DMA2, OPC (test area), TDMA1, and DMA1 areas are formed.
- the size of the layer 0 read-in zone and the size of the layer 1 read-in zone are the same as those of the single-layer disc.
- the size of the outer zone 0 and the outer zone 1 is the same as the read zone of the single-layer disc.
- DMA The structure of the DMA recorded in the lead-in zone and lead-out zone (and outer zones 0 and 1 in the case of a dual-layer disc) will be described.
- Figure 4 shows the structure of the DMA.
- the size of the DMA is 32 clusters (32 x 6553 bytes) An example is shown below. Note that a cluster is the minimum unit of data recording. Of course, the DMA size is not limited to 32 clusters.
- the data positions of the respective contents in the DMA are shown as cluster numbers 1 to 32 of the 32 clusters.
- the size of each content is shown as the number of clusters.
- DMA digital advanced trademark of the Dowred Disc
- the contents of this DDS will be described in FIG. 5.
- the DDS has the size of one cluster, and is recorded four times repeatedly in the section of the four clusters.
- the section of the four clusters of cluster pickers 5 to 8 is the first recording area (DFL # 1) of the differential list DFL.
- the structure of the differential list DFL is described in Fig. 6, but the differential list DFL is data of 4 cluster sizes, and the configuration is such that the individual replacement address information is restored in it.
- the section of the four clusters 9 to 12 is the second recording area (DFL # 2) of the differential list DFL.
- the recording area of the third and subsequent differential list DFL # 3 to DFL # 6 is prepared for every four clusters. Recording area (DFL # 7).
- the byte position indicates the first byte of the DDS, which is 655336 bytes, as byte 0.
- the number of bytes indicates the number of bytes of each data content.
- DDS Identifier “DS” is recorded to identify the cluster as a DDS cluster.
- One byte at position 2 contains a DDS format number (format purge
- the update count of the DDS is recorded in four bytes at byte positions 4 to 7.
- the replacement management information is written in the DMA itself at the time of finalization and is not updated, and the replacement management information is performed in the TDMA. Therefore, at the time of final finalization, the number of updates of DDS (TDDS: temporary DDS) performed in TDMA is recorded at the byte position.
- the first physical sector address (AD DRV) of the drive area in the DMA is recorded.
- the head physical sector address (AD DFL) of the differential list DFL in the DMA is recorded.
- the four bytes of the pipe positions 32 to 35 are the start position of the user data area in the data zone, that is, the position of LSN (logical sector number) "0", and the position of PSN (phisical sector number: Physical sector address).
- the four locations, 36 to 39, are located in the data zone.
- the end position of the data area is indicated by LSN (logical sector address).
- the four bytes at byte positions 40 to 43 indicate the size of the I S A in the data zone (I S A of a single-layer disc or I S A of a layer 0 of a two-layer disc).
- the four bytes at bit positions 48 to 51 indicate the size of the IS A in the data zone (I SA of layer 1 of a dual-layer disc).
- One byte at byte position 52 indicates a replacement area use flag indicating whether data rewriting is possible using ISA and OSA.
- the spare area available flag shall indicate when all the ISAs or OSAs have been used.
- the DDS includes the address of the user data area, the size of the IOSA, the size of the OSA, and the flag for using the spare area. In other words, it is management / control information that manages the area of IS A and OS A in the data zone.
- FIG. 6 shows the structure of the diff list D FL.
- the direct list DFL is recorded in the recording area of four clusters.
- the number of bytes indicates the number of bytes as the size of each data content.
- the first 64 bytes of the diff list DFL are used as the list management information.
- This differential list management information includes information that identifies the cluster as a differential list, purge information, the number of updates to the differential list, and the number of entries in the differential list. Is recorded.
- replacement address information a ti of eight bytes is recorded as the contents of the entry in the differential list.
- Figure 7 shows the 4-byte direct list management information.
- the character string "DL" is recorded in byte position 0 to byte 2 as the identifier of the diff list DFL.
- One byte at byte position 2 indicates the format number of the direct list DFL.
- the four bytes from byte position 4 indicate the number of times the differential list D FL has been updated. Note that this is a value that takes over the number of updates of the temporary diff list TDFL described later.
- Figure 8 shows the structure of the replacement address information ati. That is, it is information indicating the contents of each entry that has been subjected to the replacement processing.
- the total number of replacement address information at i is a maximum of 3 2 7 5 9 for a single-layer disc.
- One replacement address information ati is composed of 8 bytes (64 bits). Each bit is indicated as bits b63 to b0.
- Bits b63 to b60 record the status information (status 1) of the entry.
- the status information is set to “0000”, indicating a normal replacement processing entry.
- Bits b59 to b32 indicate the first physical sector address PSN of the replacement cluster. That is, the cluster replaced by a defect or rewrite is indicated by the physical sector address PSN of the first sector.
- Bits b31 to b28 are reserved. Note that another status information (status 2) in the entry may be recorded. Bits b27 to b0 indicate the physical sector address PSN of the head of the replacement cluster.
- the replacement cluster is indicated by the physical sector address PSN of the first sector.
- the above-described replacement address information ati is taken as one entry, and the replacement source cluster and the replacement destination cluster for one replacement process are indicated.
- the replacement management information is recorded in the above data structure. However, as described above, this information is recorded in the DMA. Is when the disc is finalized, in which case the latest replacement management information in TDMA is reflected.
- TDMA temporary DMA
- replacement management information is additionally recorded in response to data rewriting and replacement processing occurring in response to the detection of a defect. Will be updated.
- Figure 9 shows the structure of TDMA.
- the size of TDMA is, for example, 2048 clusters.
- a space bitmap for layer 0 is recorded.
- a space bitmap is assigned one bit for each cluster of the data zone, which is the main data area, and the lead-in zone, which is the management / control area, and one read-out zone (one zone of data). Is the write / non-presence indicator information indicating whether or not each cluster has been written.
- the space bitmap all clusters from the lead-in zone to the lead-out zone (outer zone) are assigned to one bit, but this space bitmap can be composed of one cluster size.
- the cluster with cluster number 2 has a space bit mask for Layer 1. It is said that Of course, in the case of a single-layer disc, there is no need for a space bitmap for layer 1 (second layer).
- TDFL temporary effect list
- the first TDFL is recorded from the position of cluster number 2. Then, in accordance with the occurrence of the replacement process, TDFL is additionally recorded at a cluster position where no space is left thereafter.
- the size of TD FL is from one cluster to a maximum of four clusters. Since the space bit map indicates the writing status of each cluster, it is updated as data writing occurs. In this case, a new space bitmap is created from the beginning of the empty area in TDMA, as in TDFL.
- a space bitmap or TDFL is added as needed in TDMA.
- the structure of the space bit map and TDFL will be described below.
- Figure 10 shows the configuration of the space bitmap.
- the space bitmap indicates the recorded / unrecorded state of one cluster on the disk with one bit, and sets, for example, “1” to the bit corresponding to the case where the cluster is unrecorded.
- This is a bitmap.
- two layers In the case of a disk, this is an example of a bitmap that holds independent information for each layer.
- the capacity of 25 GB of one recording layer can be constituted by a bit map having a size of 25 sectors.
- FIG. 10 shows 32 sectors in one cluster as sector 0 31.
- the byte position is shown as a byte position in the sector.
- space bit map management information is recorded in the first sector 0 in the first sector 0 in the first sector 0 in the first sector 0 space bit map management information is recorded.
- Two bytes from byte position 0 of sector 0 are recorded as a space bitmap ID (Un-allocated Space Bitmap Identifier) (JB or JB).
- a format version (type number) is recorded, and is set to, for example, “0h”.
- the layer naming is recorded. That is, whether the space bit map corresponds to the layer 0 or the layer 1 is indicated.
- the 48th byte from byte position 16 contains the bitmap information.
- the bitmap information is composed of zone information corresponding to each of three zones: inner zone, data zone, and outer zone (, one Information for Inner Zone) ⁇ , ⁇ Information for Data Zone (Zone Information for Outer Zone).
- Each zone information includes the start position of the zone (Start Cluster First PSN), the start position of bitmap data (Start Byte Position of Bitmap data), and the size of bitmap data (Validate Bit Length in Bitmap data) and the reserve are composed of 16 bytes, each of which is 4 bytes.
- start position of the zone (Start Cluster First PSN)
- start position of the zone on the disk that is, the start address when bit-mapping each zone is indicated by PSN (physical sector address).
- the start position of the bitmap data indicates the start position of the bitmap data for the zone relative to the Un-al located Space Bitmap Identifier at the head of the space bitmap. This is indicated by the number of bytes as a position.
- the size of bitmap data indicates the size of bitmap data of the zone in terms of the number of bits.
- the size of the bitmap data is one sector per 1 GB.
- the area up to the last sector (sector 31) is reserved and is set to ⁇ 00hj.
- TDD is recorded in the last sector (sector 31) of the space bitmap.
- the management based on the above bitmap information is as follows. First, a space bitmap in which a layer 0 is indicated as a layer picker at byte position 4, that is, a space bitmap for layer 0 of a single-layer disc or a double-layer disc will be described.
- the Zone Information for Inner Zone indicates the information of the inner zone of Layer 0, that is, the information of the lead-in zone.
- the start position of the zone (Start Cluster First PSN) is indicated by a solid arrow.
- the PSN of the start position of the lead-in zone is indicated.
- the bitmap data size (Validate Bit Length in Bitmap data) indicates the size of the bitmap data for the lead-in zone.
- the Zone Information for Data Zone indicates information on the data zone of Layer 0.
- the PSN of the start position of the data zone is indicated as indicated by a solid arrow.
- the bitmap data size (Validate Bit Length in Bitmap data) indicates the size of the bitmap data for the data zone.
- the Zone Information for Outer Zone indicates the information of the outer zone of Layer 0, that is, the read zone of a single-layer disc or the zone 0 of the outer layer of a two-layer disc.
- the PSN of the start position of the lead-out zone is indicated as shown by a solid arrow.
- the bitmap data size indicates the size of the bitmap data for the lead-out zone (or for the outer zone 0).
- the Zone Information for Inner Zone indicates the information of the inner zone of layer 1, that is, the lead-out zone.
- the PSN of the start position of the readout zone is indicated as indicated by a dashed-dotted arrow. Is the starting position).
- the bitmap data size (Validate Bit Length in. Bitmap data) indicates the size of the bitmap data for the lead-out zone.
- Zone Information for Data Zone information on the data zone of Layer 1 is shown.
- the PSN of the start position of the data zone is indicated as shown by the dashed line arrow.
- the bitmap data size (Validate Bit Length in Bitmap data) indicates the size of the bitmap data for the data zone.
- Zone Information for Outer Zone indicates information on outer zone 1 of layer 1.
- the PSN of the start position of the outer zone 1 is indicated as indicated by a dashed line arrow.
- the bitmap data size indicates the size of the bitmap data for the outer zone 1.
- TD FL temporary D FL
- the TDFL is recorded in the vacant area following the space bit map in the TDMA, and is added to the head of the vacant area every time it is updated.
- Figure 11 shows the configuration of the TD FL.
- the TD FL consists of 1 to 4 clusters. As can be seen from the comparison with the DFL in Fig. 6, the first 64 bytes are used as the descriptor list management information, and the replacement address information ati for each 8 bytes is recorded after the pipe position 64. In the same way, the next eight address bytes after the last replacement address information ati #N are the termination of the replacement address information.
- TDFL of 1 to 4 clusters is different from DFL in that temporary DDS (TDDS) is recorded in 248 bytes which is the last sector.
- TDDS temporary DDS
- the last address of the cluster to which the alternate address information end belongs Fill up to 0h before the last sector. And TDD S is recorded in the last sector. If the end of the replacement address information belongs to the last sector of the cluster, it shall be padded with zeros up to the last sector of the next cluster, and the TDDS shall be recorded in the last sector.
- the 64-byte differential list management information is the same as the DFL differential list management information described with reference to FIG.
- serial number of the diff list is recorded as the number of update of the 4-byte directory list from byte position 4.
- the serial number of the directory list management information in the latest TDFL indicates the number of times of updating the differential list.
- the number of entries in the differential list DFL of the 4 bytes from the byte position 1 and 2 forces, that is, the number of replacement address information ati, and the replacement area of the 4 bytes from the byte position 24 forces ISA 0
- the value at the time of updating the TDFL is recorded.
- the structure of the replacement address information ati in the TDFL is also the same as the structure of the replacement address information ati in the DFL shown in FIG. 8, and the replacement address information ati is regarded as one entry and the replacement for one replacement process is performed.
- the original cluster and the replacement cluster are indicated. Such an entry is registered in the temporary factor list TDFL having the structure shown in FIG.
- the status 1 of the TD FL replacement address information ati may be “0 1 0 1” or “1 0 1 0” in addition to “0 0 0 0”.
- Status 1 S “0 1 0 1” “1 0 1 0” means that when multiple physically contiguous clusters are collectively replaced, the multiple clusters are collectively replaced and managed (burst transfer). Management). That is, when the status 1 is “0 1 0 1”, the first physical sector address of the replacement source cluster of the replacement address information ati and the first physical sector address of the replacement destination cluster are the first physical sector address of a plurality of physically continuous clusters. It indicates the replacement source and replacement destination for the cluster.
- the first physical sector address of the replacement source cluster and the first physical sector address of the replacement cluster in the replacement address information ati are the last physical sector addresses of a plurality of physically continuous clusters. It indicates the replacement source and replacement destination for the cluster of.
- the force S which has basically the same structure as the DFL, that the size can be expanded to 4 clusters
- the TDD S is recorded in the last sector
- the replacement address information ati and It has features such as burst transfer management.
- the space bit map and TDF are recorded as shown in Fig. 9, but as described above, the 2048 bytes as the last sector of the space bit map and TDFL have TDD S (temporary disc). definition structure) is recorded.
- 'TDD S is composed of one sector (2048 bytes). And it contains the same contents as DDS in DMA described above. Note that the DDS is one cluster (65536 bytes). However, as described in FIG. 5, the actual contents of the DDS are defined only up to byte position 52. It is. In other words, the actual contents are recorded in the first sector of one cluster. For this reason Even if the TDD S is one sector, the contents of the DDS can be included.
- TDD S has the same contents as DDS from byte positions 0 to 53. However, from byte position 4 the TDDS serial number, from byte position 16 the physical address of the start of dry area in the TPMA, and from byte position 24 the physical address of the TDFL in the TDMA (AD DFL) .
- the outermost physical sector address L R ⁇ in which data is recorded in the user data area is recorded in four bytes from byte position 1024. In the four bytes from byte position 1028, the start physical sector address (AD BP0) of the latest space bitmap for layer 0 in TDMA is recorded.
- the start physical sector address (AD BP1) of the latest space bit map for layer 1 in TDMA is recorded.
- One byte at the pipe position 1 036 contains a flag that controls the use of the overwrite function.
- the TDS includes the address of the user data area, the size of the IS A, the size of the O 'S A, and the flag for the use of the spare area.
- it is management / control information for managing the areas of ISA and OSA in the data zone. In this respect it is similar to DDS.
- AD DFL latest valid temporary DFL
- the TDD is recorded in the last sector of the space bitmap and the TDFL
- a new TDDS is recorded after the space bitmap or the TDFL is added. Therefore, in the TDMA of FIG. 9, the last added space bitmap or TDDS in the TDFL becomes the latest TDDS, and the latest space bitmap and TDFL are shown therein.
- Figure 13 shows the positions of IS A and OS A.
- ISA inner spare area
- OSA outer spare area
- IS A and OS A are also used as replacement areas for actually recording data to be written to the target address when there is a request for writing to a recorded address, that is, data rewriting.
- FIG. 13 (a) shows the case of a single-layer disc, in which IS A is provided on the innermost circumference of the data zone and OS A is provided on the outermost circumference of the data zone.
- FIG. 13 (b) shows a case of a two-layer disc, in which ISOA is provided on the innermost periphery of the data zone of layer 0, and OSOA is provided on the outermost periphery of the data zone 'of layer 0. Further, I S A 1 is provided on the innermost side of the layer 1 data zone, and O S A 1 is provided on the outermost side of the layer 1 data zone.
- the size of ISA 0 and ISA 1 on a dual-layer disc may be different.
- OSA 0 and OSA 1 are the same size.
- the sizes of ISA (or ISA 0, I, SA 1) and OSA (or OS A0, OSA 1) are defined in the above DDS and TDDS.
- the size (size) of IS A is determined at the time of initialization, and the size after that is fixed, but the size of OS A can be changed even after data is recorded. That is, when the TDD is updated, the OSA size can be enlarged by changing the value of the OSA size recorded in the TDDS.
- the replacement process using these ISAs and OSAs is performed as follows.
- the case of data rewriting is taken as an example. For example, suppose that a data write, that is, a rewrite request has occurred in a cluster in the user data area where data has already been recorded. In this case, the data cannot be written to the cluster because it is a write-once disk.
- This replacement processing is managed as an entry of the above-mentioned replacement address information ati.
- one replacement address information ati is entered as the replacement source is the cluster address where the data recording was originally performed, and the replacement destination is the cluster address in which the rewrite data is written in the ISA or OSA.
- the rewriting data is recorded in the ISA or OSA, and the replacement of the data position due to the rewriting is managed by the replacement address information ati in the TD FL in the TDMA, so that the write one can be performed. It is a disk that can actually rewrite data (for example, when viewed from the host system's OS and file system).
- 3-3 TDMA usage method As described above, in TDMA, the space bitmap and TDFL are updated as needed in accordance with data writing and replacement processing.
- Fig. 14 shows how TDMA updates.
- FIG. 14 (a) shows a state in which a space bitmap (for layer 0), a space bitmap (for layer 1), and TDFL are recorded in TDMA.
- TDDS temporary DDS
- TDD S3 in the last sector of TDFL is the latest TDDS.
- this TDD S has information indicating the position of the latest valid space bit map (AD BP0, AD BPl) and information indicating the position of the latest valid TD FL (AD DFL).
- effective information is indicated as shown by a solid line (AD BP0), a broken line (AD BP1), and a dashed line (AD DFL).
- the TDFL including itself is designated as an effective TDFL by the address (AD DFL).
- the space bitmap (for layer 0) and the space bitmap (layer 1) are specified as addresses (AD BP0, AD BPl) as valid space bit maps.
- Fig. 14 (b) free space A new space bitmap (for layer 0) is recorded at the beginning of the.
- TD DS 4 of the last sector becomes the latest TD DS, and valid information is specified by the address (AD BP0, AD BP1, AD DFL) in that.
- the space bitmap (for layer.0) including itself is specified as valid information by the address (ADBP0).
- the address (AD BP1, AD DFL) specifies the same space bitmap (layer 1) as in Fig. 14 (a) and TDFL as valid information.
- the space bitmap (for layer 0) including itself is designated as valid information by the address (AD BP0).
- the address (AD BP1, AD DFL) specifies the same space bit map (layer 1) as in Fig. 14 (a) and (b) and TDFL as valid information.
- the TDD in the last sector of the latest information indicates the valid information (TD FL / space bitmap) in TDMA.
- the disk drive can refer to the last recorded TDFL or TDDS in the space bitmap to determine a valid TDFL / space bitmap.
- FIG. 14 described the case of the dual-layer disc. That is, In this case, a sub-bit map (for layer 0) and a space bit map (for layer 1) are recorded.
- the TDMA in the second layer, Layer 1 is used after the Layer 0 TDMA is exhausted.
- FIG. 15 shows a state in which the TDMA of layer 0 has been used up by N recordings of the TDFL / space bit map. This is the case where the space bitmap (for layer 1) has been continuously updated after Fig. 14 (c).
- FIG. 15 shows a state in which two space bitmaps (for layer 1) are further recorded in the layer 1 TDMA after the layer 0 TDMA is exhausted. At this time, TDDSN + 2 of the last sector of the latest space bitmap (for layer 1) is the latest TDDS.
- valid information is indicated as shown by a solid line (AD BP0), a broken line (AD BP1), and a dashed line (AD DFL).
- the space bitmap (for layer 1) including itself is specified as valid information by the address (ADBP1) '.
- the address (AD BP0, AD DFL) specifies the same space bitmap (for layer 0) as in Fig. 14 (c) and TDFL as valid information (updated latest information).
- TD FL space bitmap (for layer 0)
- space bitmap for layer 1
- each recording layer layers 0 and 1
- these are used for updating the TDFL / space bitmap while being exhausted in order.
- the TDMA of each recording layer is used as one large TDMA, and a plurality of TDMAs can be used efficiently.
- the effective TDFLZ space bit map can be grasped simply by taking the last recorded TDDS.
- the embodiment assumes a single-layer disc and a double-layer disc, a disc having three or more recording layers is also conceivable.
- the TDMA of each layer may be used while being exhausted in the same order as described above.
- Disk Drive Device Next, a disk drive device (recording / reproducing device) corresponding to the above write-once type disk will be described.
- the disk drive of this example is a write-once type disk, for example, in a state where only the pre-recorded information area PIC of FIG. 1 is formed.
- the write-once area shall be able to form the disk layout in the state described in Fig. 1 by performing formatting processing on the disk in which nothing is recorded. Data is recorded / reproduced in the user data area for such formatted discs.
- record in TDMA, ISA, OSA and update Z Things When necessary, record in TDMA, ISA, OSA and update Z Things.
- Figure 16 shows the configuration of the disk drive.
- the disc 1 is the write-once disc described above.
- the disk 1 is mounted on a turntable (not shown), and is rotated at a constant linear velocity (CLV) by a spindle motor 52 during a recording / reproducing operation.
- the optical pickup (optical head) 51 reads out the management z control information as ADIP address embedded as the wobbling of the groove track on the disk 1 and pre-recorded information.
- management / control information and user data are recorded on tracks in the license area by optical pickup, and at the time of reproduction, data recorded by the optical pickup is read.
- a laser diode serving as a laser light source, a photodetector for detecting reflected light, an objective lens serving as an output end of the laser light, and laser light are irradiated onto the disk recording surface via the objective lens.
- An optical system (not shown) for guiding the reflected light to the photodetector is formed.
- the objective lens is held movably in the tracking direction and the focus direction by a biaxial mechanism.
- the entire pickup 51 can be moved in the radial direction of the disc by a thread mechanism 53.
- the laser diode of the pickup 51 is driven to emit laser light by a drive signal (drive current) from the laser driver 63.
- the information on the reflected light from the disc 1 is detected by a photodetector in the pickup 51, and is supplied to the matrix circuit 54 as an electric signal corresponding to the amount of received light.
- the matrix circuit 54 is provided with a current-voltage conversion circuit, a matrix calculation / amplification circuit, and the like corresponding to output currents from a plurality of light-receiving elements as photodetectors, and generates necessary signals by matrix calculation processing.
- a push-pull signal is generated as a signal related to the coupling of the group, that is, a signal for detecting the coupling.
- matrix circuit 54 may be integrally formed in the pickup 51 in some cases.
- the reproduced data signal output from the matrix circuit 54 is supplied to the reader / writer circuit 55, the focus error signal and the tracking error signal are supplied to the service circuit 61, and the push-pull signal is supplied to the towable circuit 58. .
- the reader / writer circuit 55 performs a binarization process on the playback data signal, a playback clip generation process using a PLL, etc., and plays back the data read out by the pickup 51 to form a modulation / demodulation circuit 5. Supply to 6.
- the modulation / demodulation circuit 56 has a functional part as a decoder at the time of reproduction and a functional part as an encoder at the time of recording.
- demodulation of run-length limited code is performed as a decoding process based on the playback clock.
- the ECC encoder Z decoder 57 performs an ECC encoding process for adding an error correction code during recording and an ECC decoding process for performing error correction during reproduction.
- the data demodulated by the modulation and demodulation circuit 56 is taken into the internal memory, and error detection / correction processing and interleave processing are performed. Obtain playback data.
- the data decoded to the reproduction data by the ECC encoder Z decoder 57 is read out based on the instruction of the system controller 60, and connected devices, for example, an AV (Audio-Visual) system 1 2 Transferred to 0.
- AV Audio-Visual
- the push-pull signal output from the matrix circuit 54 as a signal related to the coupling of the group is processed in the coupon circuit 58.
- the push-pull signal as ADIP information is demodulated into a data stream forming an ADIP address in a wobbled circuit 58 and supplied to an address decoder 59.
- the address decoder 59 decodes the supplied data, obtains an address value, and supplies it to the system controller 60.
- the address decoder 59 generates a clock by PLL processing using the enable signal supplied from the enable circuit 58, and supplies it to each section as, for example, an encoding clock at the time of recording.
- the push-pull signal output from the matrix circuit 54 as a signal related to group wobbling, the push-pull signal as pre-recorded information PIC is subjected to bandpass filter processing in the Supplied to 5-5. Then, after being binarized and converted into a data bit stream, the data is subjected to ECC decoding and dinterleaving by an ECC encoder / decoder 57 to extract data as prerecorded information. The extracted pre-recorded information is supplied to the system controller 60.
- the system controller 60 can perform various operation setting processing and copy protection processing based on the read pre-recorded information.
- the power S from which the recording data is transferred from the AV system 120 the recording data is sent to the memory in the ECC encoder / decoder 57 and buffered.
- the ECC encoder / decoder 57 adds an error correction code, an interleave, and a subcode as encoding processing of the buffered recording data.
- the ECC encoded data is subjected to, for example, RLL (1-7) PP modulation in a modulation / demodulation circuit 56, and is supplied to a reader / writer circuit 55.
- the clock generated from the wobble signal is used as the encode clock serving as a reference clock for these encoding processes at the time of recording.
- Record data generated by the encoding process is transferred to the reader / writer circuit.
- the laser driver 63 supplies the supplied laser drive pulse to the laser diode in the pickup 51 to drive the laser emission. As a result, a pit corresponding to the recording data is formed on the disc 1.
- the laser driver 63 has a so-called APC circuit (Auto Power Control), and monitors the laser output power by the output of the laser power monitor detector provided in the peak-up 51, and changes the laser output to temperature. It is controlled to be constant irrespective of the conditions.
- the target value of the laser output at the time of recording and reproduction is given from the system controller 60, and the laser output level becomes the target value at the time of recording and reproduction, respectively. Control.
- the servo circuit 61 generates various servo drive signals of focus, tracking, and thread from the focus error signal and the tracking error signal from the matrix circuit 54, and executes the servo operation.
- a focus drive signal and a tracking drive signal are generated according to the focus error signal and the tracking error signal, and the focus coil and the tracking coil of the two-axis mechanism in the pickup 51 are driven.
- a pickup 51, a matrix circuit 54, a servo circuit 61, and a tracier servo loop and a focus servo loop formed by a two-axis mechanism are formed.
- the servo circuit 61 turns off the tracking servo loop and outputs a jump drive signal in response to a track jump command from the system controller 60 to execute a track jump operation. Also, the servo circuit 61 generates a thread drive signal based on a thread error signal obtained as a low-frequency component of the tracking error signal, an access execution control from the system controller 60, and the like.
- Drive mechanism 5 3 Although not shown, the thread mechanism 53 has a mechanism including a main shaft for holding the pickup 51, a thread motor, a transmission gear, etc., and drives the thread motor in accordance with a thread drive signal. Then, the required slide movement of the pickup 51 is performed.
- the spindle servo circuit 62 controls the spindle motor 52 to rotate CLV.
- the spindle servo circuit 62 obtains the clock generated by the PLL process for the wobble signal as the current rotation speed information of the spindle motor 52, and compares this with predetermined CLV reference speed information. Generate spindle error signal. At the time of data reproduction, the reproduction clock generated by the PLL in the reader / writer circuit 55 (clock that serves as a reference for the dude processing) becomes the current rotation speed information of the spindle motor 52. The spindle error signal can be generated by comparing this with the specified CLV reference speed information.
- the spindle servo circuit 62 outputs the spindle drive signal generated in response to the spindle error signal, and causes the spindle motor 52 to perform the CLV rotation.
- the spindle servo circuit 62 generates a spindle drive signal in accordance with the spindle kick Z brake control signal from the system controller 60, and also executes operations such as starting, stopping, accelerating, and decelerating the spindle motor 52. .
- a system controller 60 formed by a microcomputer.
- the system controller 60 executes various processes in response to a command from the AV system 120.
- the system controller 60 when a write command (write command) is issued from the AV system 120, the system controller 60 first moves the pickup 51 to the address to be written.
- the ECC encoder / decoder 57 and the modulation / demodulation circuit 56 encode the data (for example, video data of various formats such as MPEG2, audio data, etc.) transferred from the AV system 120 as described above. Execute the process. Then, as described above, recording is executed by supplying the laser drive pulse from the reader Z writer circuit 55 to the laser driver 63.
- a read command for requesting the transfer of certain data (such as MPEG 2 video data) recorded on the disc 1 from the AV system 120 When is supplied, seek operation control is first performed for the specified address. That is, a command is issued to the servo circuit 61, and the access operation of the pickup 51 is executed with the address specified by the seek command as a target.
- the operation control required to transfer the data in the specified data section to the AV system 120 is performed. That is, data is read from the disk 1, and decode / buffering in the reader / writer circuit 55, the modulation / demodulation circuit 56, the ECC encoder 7 decoder 57, and the like are executed, and the requested data is transferred.
- the system controller 60 can control access and recording / reproducing operation using the ADIP address detected by the cobbled circuit 58 and the address decoder 59.
- the system controller 60 stores the unique ID recorded in the BCA of the disc 1 (if the BCA is formed) and the reproducing group in the read-only area. Reads the pre-recorded information (PIC) recorded as data.
- PIC pre-recorded information
- seek operation control is first performed for BCA and pre-recorded data zone PR. That is, a command is issued to the servo circuit 61 to make the pickup 51 access the innermost circumference of the disk.
- a reproduction trace is performed by the pickup 51, a push-pull signal as reflected light information is obtained, and a decoding process is performed by the cobble circuit 58, the reader / writer circuit 55, and the ECC encoder // decoder 57.
- the system controller 60 reads the BCA information thus read out. Performs laser power setting / copy protection processing, etc., on the basis of prerecorded information.
- FIG. 16 shows the cache memory 60 a in the system controller 60.
- the cache memory 60a is used for, for example, holding ⁇ of the TDFL / space bitmap read from the TDMA of the disk 1, and updating it.
- the system controller 60 controls, for example, each unit when the disc 1 is loaded to execute reading of the TDFL / space bitmap recorded in the TD ⁇ , and stores the read information in the cache memory 60 a. To be kept.
- the TDFL / space bitmap in the cache memory 60a is updated. For example, replacement processing is performed by writing data, rewriting data, etc., and when updating the space bitmap or TDFL, the TDFL or space bitmap is additionally recorded in the TDMA of disk 1 each time. That's good, but doing so will quickly consume TDMA on Disk 1.
- the TDFL / space bitmap is updated in the cache memory 60a. Then, the final (latest) TDFL / space bitmap in the cache memory 60a is written to the TDMA of the disk 1 at the time of an ejection or the like. Then, many updates of the TDFL / space bitmap are collectively updated on the disk 1, and the TDMA consumption of the disk 1 can be reduced.
- the cache memory 60 a In the operation processing such as recording described later, the cache memory 60 a The following description is based on the method of reducing the TDMA consumption of the disk 1 by using the method. However, needless to say, according to the present invention, the TDFL no-space bitmap may be updated every time as writing to the disk 1 without using the cache memory 60a.
- the configuration example of the disk drive device in FIG. 16 is an example of a disk drive device connected to the AV system 120.
- the disk drive device of the present invention is connected to, for example, a personal computer or the like. You can do it.
- the device may be not connected to another device.
- an operation unit and a display unit are provided, and the configuration of the interface unit for data input / output is different from that in Fig. 16.
- recording and reproduction are performed according to the user's operation, and a terminal unit for inputting / outputting various data may be formed.
- a write request or read from a host device such as the AV system 120 is performed.
- the target address is specified by the logical sector address.
- the disk drive converts this into a physical sector address and performs the processing. The logical-to-physical address conversion will not be described one by one.
- the “starting physical sector address of the user data area” recorded in TDD may be added to the logical sector address.
- step F101 the specified address (cluster) has been recorded with reference to the space bitmap taken into the cache memory 60a (or the latest space bitmap updated in the cache memory 60a). Check whether it is recorded or not.
- step F102 proceeds to the user data writing process shown in FIG. '
- step F103 proceeds to the overwriting process shown in FIG.
- the user data intrusion process in FIG. 18 is a normal write process because it is a write command for an address for which recording has not yet been performed. 'However, if an error occurs at the time of writing due to scratches on the disc, replacement processing may be performed.
- step F111 the system controller 60 executes control for writing data to the specified address.
- the pickup 51 is made to access the specified address, and the data requested to be written is Execute data recording.
- step F112 When the data writing is completed normally, the process proceeds from step F112 to F113 to update the space bitmap in the cache memory 60a.
- the bit corresponding to the cluster written this time is set to a value indicating that writing has been completed.
- step F111 if the data writing in step F111 cannot be completed normally and the replacement processing function is turned on, go to step F113 .
- step F112 whether or not the replacement processing function is enabled in step F112 is determined by whether or not ISA and OSA are defined. If at least one of I S A and O S A is defined, replacement processing is possible, so the replacement processing function is assumed to be effective.
- I S A and O S A are defined when the size of I S A and O S A is not zero in the TDD S in the above TDMA.
- at least one of IS A and OS A is defined as an actual (non-zero size) replacement area when formatting disk 1, and the first TDMA is recorded.
- OSA is redefined and the size is no longer zero.
- step F112 If the replacement processing function is invalidated in step F112 (when neither ISA nor OSA exists), the process proceeds to step F113, and in this case, the cache memory 60a The bit corresponding to the specified address is recorded in the space bit map in You. An error ends for a write request.
- the written bit is set for the space bit map as in the case of normal termination. This allows the defective area to be managed as written in the space bitmap. As a result, even if there is a write request to the defective area where the error has occurred, efficient processing can be performed by referring to the space bitmap.
- step F112 If it is determined in step F112 that the replacement processing function is ON, and if the processing proceeds to step F114, it is first determined whether the replacement processing is actually possible. In order to perform the replacement process, at least a spare area (either ISA or OSA) for writing this data is available, and an entry of replacement address information ati that manages the replacement process is added ( In other words, the TDFL is updated.) It is necessary that there is room in TDMA.
- a spare area either ISA or OSA
- the processing of the system controller 60 proceeds from the step F114 to the step F115, and the pickup 51 To the ISA or OSA, and record the data requested to be written this time to a free address in the ISA or OSA.
- step F116 the TDFL and the space bitmap are updated in the cache memory 60a in accordance with the current write including the replacement processing.
- the content of the TD FL is updated so that the replacement address information ati of FIG. 8 indicating the current replacement process is newly added. Also in response to this, Adds the number of registered direct list in the direct list management information and subtracts the number of unrecorded clusters of ISA / OSA. In the case of one cluster replacement process, one is added to the number of registered differential lists, and the value of the number of unrecorded clusters in ISA / OSA is further reduced by one.
- the bits corresponding to the address (cluster) for which a write request was made and a write error occurred, and the address (cluster) to which the data was actually written in the ISA or OSA are stored. Mark it as recorded.
- the processing for the write request is completed.
- a write error occurred for the address specified in response to the write request, but the data write was completed by the replacement process. From the viewpoint of the host device, the writing is normally completed.
- step F114 if it is determined in step F114 that there is no free space in the spare area (ISA or OSA) or if there is no free space for updating the TDFL in TDMA, the replacement process can no longer be performed. Proceed to step F117 to return an error to the host device and end the process.
- step F101 of Fig. 17 above when the address specified for writing from the host device is determined to have been written by the space bitmap, and the process proceeds to step F103. Performs the overwrite function processing of FIG. In that case, the system controller 60 first determines whether or not the overwriting, that is, the data rewriting function is valid, in step F122. This judgment is to confirm the overwrite function use enable / disable flag in the TDDS shown in FIG.
- step F122 If the overwrite function availability flag is not "1" (if it is not valid), the process proceeds to step F122, and the host is determined to be incorrect in address specification. An error is returned to the monitoring device and the processing ends.
- the process proceeds to step F123, and first, it is determined whether or not a replacement process for data rewriting is actually possible.
- the spare area either ISA or OSA
- the spare area has at least a free space for writing this data, and the entry of the replacement end address information ati that manages the replacement process. (That is, updating the TDFL) must have room for TDMA.
- step F123 the processing of the system controller 60 proceeds from step F123 to step F124, and the pickup 51 To the ISA or OSA, and record the data requested to be written this time to a free address in the ISA or OSA.
- step F125 the TDFL and the space bitmap are updated in the cache memory 60a in accordance with the replacement process performed for the current data rewrite.
- the content of the TDFL is updated so that the replacement address information ati in FIG. 8 indicating the current replacement process is newly added.
- the replacement address information ati registered in the TDFL is used. Searches for the entry that corresponds to the replacement source address. If the replacement address information a t i corresponding to the replacement source address has already been registered, the replacement address in the replacement address information a t i is stored in the I S A or O recorded this time.
- the replacement address information ati When the replacement address information ati is added, the number of registered directory listings in the list management table shown in FIG. 7 is added. Further, the value of the number of unrecorded clusters of I S A / O S A is subtracted.
- the bit corresponding to the address (cluster) where the data was actually written in the ISA or OSA by replacement processing for data rewriting is recorded.
- the system controller 60 can respond to a write request for an already recorded address, that is, a data rewrite request, by using the ISA and the OSA.
- step F 1 2 3 If there is no free space in both OSA and ISA in step F 1 2 3 or if there is no free space in TDMA for update, the replacement process cannot be performed and data rewriting cannot be supported. Proceed to 1 26, return an error to the host system that there is no write area, and end the processing.
- step F116 of Fig. 18 and step F12'5 of Fig. 19 the force S for newly generating the replacement address information ati according to the replacement processing.
- the processing is as shown in FIG.
- step F151 it is determined whether or not the cluster to be subjected to the replacement process is a plurality of physically continuous clusters.
- step F154 Replacement of one cluster or multiple clusters that are not physically continuous
- the process proceeds to step F154 to generate replacement address information ati for each of one or a plurality of clusters.
- the status 1 of the replacement address information ati is set to “0 0 0 0” (see FIG. 8).
- step F155 the generated replacement address information ati is added to the TD FL.
- a read request for a certain address comes from a host device such as the AV system 120 to the system controller 60.
- step F201 the process of the system controller 60 checks in step F201 whether or not the requested address has data recorded with reference to the space bitmap. If the requested address has not been recorded, the process proceeds to step F202, in which the designated address is incorrect, an error is returned to the host device, and the process is terminated.
- step F203 search the replacement address information ati recorded in the TDFL, and register the address specified this time as the replacement source address. Check if it is.
- step F203 If the specified address is not the address registered in the replacement address information ati, the process proceeds from step F203 to step F204, where data reproduction is performed from the specified address and the process ends.
- step F203 if the address related to the read request is the address registered in the replacement address information ati in step F203, the process proceeds from step F203 to step F205, and the replacement address Get the replacement address from the information ati. That is, the address in IS A or OS A.
- step F206 the system controller 60 executes data reading from the address of the ISA or OSA ⁇ registered as the replacement address, and transmits the reproduced data to the host such as the AV system 120. Transfer it to the device and finish the process.
- the time at which the TDMA update recording is performed on the disk 1 is not particularly limited, but is most preferably performed, for example, when the disk 1 is ejected. Of course, regardless of the event, it may be performed when the disk drive is turned off or periodically.
- FIG. 22 shows a process of updating the TDMA on the disk 1.
- the system controller 60 determines whether or not it is necessary to update the TDMA contents, that is, the TDFL and the space bitmap, and updates the information in the TDMA as necessary. I do.
- the system controller 60 executes the TDFL / space bitmap update process from step F301 in FIG. First, in step F302, it is checked whether TDFL has been updated in the cache memory 60a. If the TDFL has been updated, proceed to step F303 to add the TDDS (see FIG. 12) to the last sector of the updated TDFL.
- step F304 the pickup 51 records TDFL from the beginning of the empty area in the TDMA of the disk 1.
- the space bit map is updated in the cache memory 60a.
- the cache memory 60a is used.
- the space bitmap has been updated within Check whether or not.
- the space bitmap is updated. Also, since this is the case where the replacement process has been performed, the space bitmap is updated according to the replacement process.
- the space bitmap is updated as data is written, even if there is no replacement process.
- step F306 After adding TDDS (see Fig. 12) to the last sector of the space bitmap in the cache memory 60a, in step F307, the pickup 51 selects the free space in the TDMA of the disk 1 in step F307. Record the space bitmap from the beginning of the space. Then, the writing to the TDMA at the time of the ijietat is completed.
- step F304 Regarding the recording of the TD FL in step F304 and the recording of the space bitmap in step F304 on the TDMA of the disc 1, as described in FIGS. 14 and 15, It goes to the empty area in TDMA sequentially from the top. In the case of a two-layer disc, recording is performed using the layer 0 TDM'A, and after the layer 0 TDMA is exhausted, the layer 1 TDMA is used.
- the last TDFL in the TDMA or the TDD S added to the last sector in the space bitmap becomes a valid TDD S.
- a valid TD FL and space bitmap are shown.
- Figure 23 shows an example of this processing. This may be performed, for example, immediately before step F303 in FIG.
- step F355 the content of each replacement address information ati is searched in the TD FL in the cache memory 60a, and whether or not there is replacement address information ati indicating a physically continuous cluster exists. Check.
- step F352 If there is no plurality of replacement address information a ti in which both the replacement destination and the replacement source address are physically continuous, the process proceeds from step F352 to step F303 of FIG. 11 as it is. move on.
- step F 3 53 the process proceeds to step F 3 53, and the reorganization processing for combining the replacement address information ati is performed. I do.
- This reorganization process is a process like the example shown in FIGS. 24A, B and C.
- a data write request is generated separately for each of clusters CL1, CL2, CL3, and CL4, and these are respectively referred to as OSA clusters CL11, CL12. , CL 13, and CL 14 are assumed to be replaced and data rewritten.
- the four clusters are physically continuous at both the replacement source and the replacement destination.
- a write-once (write-once) disk as in this example, data can be written only once to one area, so the TDMA method is used to update replacement information while adding replacement management information.
- the address replacement information is registered for the first time when the replacement process occurs.
- the size of the TD FL is variable, and as the number of clusters to which the replacement process is applied increases.
- TD FL is large However, by enabling multiple replacement clusters to be managed collectively as described above, it is possible to reduce the TD FL expansion.
- the format of the DFL to be recorded is the rewritable optical disc. It is hoped that this will be the same as
- writing to the DMA is performed as a process at the time of finalizing the disc, for example.
- Writing to the DMA means a process of converting the disc 1 of the present example into a disc having playback compatibility with a rewritable disc.
- the system controller When writing the DMA, that is, converting the data to a compatible disk, the system controller first stores the TD FL / space bitmap in the cache memory 60a to the TDMA in step F401 of FIG. Perform the process of recording. This is the same as the processing of FIG. 22 performed at the time of the above-described ejection, and thus the detailed description is omitted.
- step F402 the latest TDDS recorded in the last recording sector in TDMA is read, and information of the DDS (see FIG. 5) is created.
- step F403 the replacement address information ati in the TD FL is Check if it is 1 or more. To do this, first read the latest TD FL recorded in TDMA. As described in Fig. 14 etc., the effective TD FL recording position can be obtained from TDDS. Then, the number of registered replacement address information ati is acquired from the number of registered differentials in the differential list management information in the TD FL.
- step F404 the process proceeds to step F404, and the data obtained by deleting TDDS from TDFL is set to DFL (see FIG. 6). This is because TDDS exists in the last sector of TDFL (Fig. 11).
- step F408 the created DDS and DFL are recorded in DMA1, DMA2, DMA3, and DMA4 on the disk 1, and the process is terminated.
- step F403 If the number of the replacement address information ati is one or more in step F403, then it is checked whether or not there is a replacement process for the continuous area.
- step F405 the replacement address information ati that has been entered is sequentially read, and the status 1 is confirmed. If the status 1 has the replacement address information ati of “0 1 0 1”, it means that the replacement processing has been performed on the continuous area.
- step F406 the data obtained by deleting TDDS from TDF′L is set to DFL.
- step F410 the replacement address with status 1 "0 1 0 1" Get the address information ati, and use this as the start address SA. Then, the replacement address information ati written is acquired, and this is set as the end address EA.
- step F411 the status 1 is set to "0000”, and the replacement address information ati of the start address SA is recorded in DFL.
- status 1 is recorded as “0 0 0 0”, and replacement address information at i of address S A + 1 is recorded in D FL. This is repeated in order, and repeated until the address reaches the end address EA.
- steps F411 and F411 is applied to all the replacement address information in which the status 1 is "0 1 0 1" in the TD FL.
- step F406 the created DFL is rearranged in ascending order using the replacement source address of the replacement address information as a key.
- step F408 the created DDS and DFL are recorded in DMA1, DMA2, DMA3, and DMA4 on the disk 1, and the process is terminated.
- the status of the replacement process is checked by reading the DMA, but the data in this example in which the DMA is recorded as described above For disk 1, as in a normal rewritable disk, it will be possible to check the status of the replacement process from the DMA and perform the corresponding process.
- a write-once type disk can respond to a write request for the same address, and therefore, a file system that cannot be used with a conventional write-once type disk Can be used.
- a file system corresponding to various OSs such as a FAT file system, can be applied as it is, and data can be exchanged without being aware of the OS differences.
- video data and music data can be used as an updatable medium as long as the unrecorded area of the ISA and OSA remains.
- the recording status of the replacement area can be managed, the address of the replacement destination when performing defect replacement processing or logically writing can be obtained without accessing the disk.
- the management / control information area of the disk such as the lead-in zone and the lead-out zone, can be managed by the space bit 1 and the map, so that the recording status of the management z control information can be managed.
- it is effective to manage the laser power adjustment area and test area (OPC).
- OPC laser power adjustment area and test area
- the user in order to find the address to be written in the OPC area, the user actually accesses the disk to search, but an area recorded with low power may be judged as unrecorded. By managing the OPC area with a space bit map, this false detection can be prevented.
- the update process of the TDFL and space bitmap which is the replacement management information, is additionally recorded in TDMA, and the information indicating the effective TDFLZ space bitmap is recorded at each time.
- TDFL / space bitmap the disk drive device can appropriately grasp the update state of the replacement management information.
- Recording the space bitmap in the TDMA means that the space zone map is not recorded in the data zone that is the main data area. For example, it does not use IS A or the like. For this reason, it is possible to use the data zone effectively and perform the replacement process that makes effective use of the replacement areas, ISSA and OSA. For example, it is possible to select which of IS A and OS A is to be used in the replacement process, for example, to be closer to the replacement source address. In this way, the operation when accessing the data that has undergone the replacement processing is made more efficient.
- a certain area is registered in the TDFL as a defective cluster to which a replacement destination has not been assigned, and is processed as a record on the space bitmap. .
- the disk drive device determines that the data has been written from the space bitmap and can record data without error by the overwrite function. It becomes.
- the data configuration is the same as that of a rewritable optical disk, so that even in a system that reproduces only rewritable optical disks, the disk of this example can be reproduced.
- the recording medium of the present invention can be applied to a recording medium other than an optical disk medium, for example, a magneto-optical disk, a magnetic disk, and a medium using a semiconductor memory.
- a write-once recording medium can be used as a substantially rewritable recording medium. Therefore, a file system such as FAT corresponding to a rewritable recording medium can be used for a write-once type recording medium, and a write-once type recording medium can be used.
- the FAT file system which is a standard file system in an information processing device such as a personal computer, is a file system capable of recording and reproducing a rewritable recording medium from various OSs (operating systems).
- the FAT file system can be applied to write-once recording media as it is, and data can be exchanged without being aware of differences in OS. This is also suitable for maintaining compatibility.
- a write-once type recording medium can be used as a data rewritable recording medium as long as a spare area and an area for updating the spare management information remain, so that a write-once recording medium can be used. Can be used effectively, and there is also an effect that waste of resources can be reduced.
- each data unit (each cluster) of each recording layer on the recording medium has been written, based on the write presence / absence indication information (space bitmap).
- the write presence / absence indication information space bitmap
- recording and reading data to and from an address specified by a host computer or the like is a process with a large load.For example, when a write request is issued, the address specified from the write presence / absence information is used. If it is known that has already been recorded, it is possible to return an error without accessing the recording medium, or to shift to data rewriting processing by replacement processing. In particular, it is possible to determine whether or not to execute the data rewriting function without accessing the recording medium.
- the processing load on the recording device and the reproducing device when realizing random access recording / reproducing on the recording medium can be reduced. Further, according to the write presence / absence information, the recording status of the spare area can be managed, so that the address of the replacement destination when performing the replacement process for the defect or the data rewriting can be obtained without accessing the recording medium.
- a management / control information area such as a lead-in Z lead-out can be managed by the write presence / absence indication information. For this reason, it is also suitable for grasping the used range of the OPC for adjusting the laser power, for example. That is, when searching for a test writing area for laser power adjustment in the OPC, it is not necessary to access the recording medium, and erroneous detection of whether or not recording has been performed can be prevented. In addition, since the area having a defect at the time of writing and its surrounding area are recorded with the write presence / absence indicator information, it is possible to omit the recording process for the address having the defect such as the time-consuming scratch. Also, by combining this with the rewrite function, it becomes possible to perform write processing apparently without write errors to the host.
- the second replacement management information area is provided in each recording layer, and is used for updating the replacement management information and the writing presence / absence indication information (space bitmap for each recording layer) while being exhausted in order. Is done.
- the second replacement management information area of each recording layer is used as one large second replacement management information area. Therefore, the plurality of second replacement management information areas can be used efficiently.
- the writing to be performed is performed.
- the validity in the second replacement management information area at each time is Replacement management information and write presence / absence indication information can be determined. That is, the recording device and the reproducing device can appropriately grasp the update state of the replacement management information and the write presence / absence indication information. Recording and playback equipment Thus, the device can realize efficient processing using the above-mentioned writing presence / absence indication information and replacement management information.
Abstract
Description
Claims
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BR0403952-1A BRPI0403952A (pt) | 2003-03-12 | 2004-03-12 | Meio de gravação e aparelhos e métodos de gravação e de reprodução |
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EP04720258A EP1612790B1 (en) | 2003-03-12 | 2004-03-12 | Recording medium, recording device, reproduction device, recording method, and reproduction method |
US10/513,971 US7203139B2 (en) | 2003-03-12 | 2004-03-12 | Recording medium, recording device, reproduction device, recording method and reproduction method |
US11/560,249 US7440374B2 (en) | 2003-03-12 | 2006-11-15 | Recording medium, recording apparatus, reproduction apparatus, recording method and reproduction method |
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US11/560,249 Continuation US7440374B2 (en) | 2003-03-12 | 2006-11-15 | Recording medium, recording apparatus, reproduction apparatus, recording method and reproduction method |
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WO2005065054A1 (en) * | 2004-01-05 | 2005-07-21 | Samsung Electronics Co., Ltd. | Support d'enregistrement optique, dispositif et procede d'enregistrmenet/reproduction de donnees sur le support d'enregistrment optique et a partir dudit support |
WO2005066943A1 (en) * | 2004-01-05 | 2005-07-21 | Samsung Electronics Co., Ltd. | Optical recording medium, apparatus for recording/reproducing data on/from optical recording medium and method of recording/reproducing data on/from optical recording medium |
EP1600975A3 (en) * | 2004-05-21 | 2007-06-06 | Samsung Electronics Co., Ltd. | Optical recording medium, recording/reproducing apparatus and method, and recording medium storing program for executing the method |
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TWI260606B (en) * | 2002-10-05 | 2006-08-21 | Samsung Electronics Co Ltd | Read-only information storage medium and method of reproducing data from the same |
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Also Published As
Publication number | Publication date |
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BRPI0403952A (pt) | 2005-02-22 |
KR100971813B1 (ko) | 2010-07-22 |
US7203139B2 (en) | 2007-04-10 |
CN100446110C (zh) | 2008-12-24 |
US7440374B2 (en) | 2008-10-21 |
TWI251215B (en) | 2006-03-11 |
EP1612790B1 (en) | 2012-10-24 |
EP1612790A1 (en) | 2006-01-04 |
ES2394431T3 (es) | 2013-01-31 |
US20050219979A1 (en) | 2005-10-06 |
TW200426793A (en) | 2004-12-01 |
KR20050109894A (ko) | 2005-11-22 |
JP4026519B2 (ja) | 2007-12-26 |
US20070086281A1 (en) | 2007-04-19 |
CN1698122A (zh) | 2005-11-16 |
JP2004280866A (ja) | 2004-10-07 |
EP1612790A4 (en) | 2008-07-23 |
MXPA04010873A (es) | 2005-07-14 |
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