WO2005041174A1 - Dispositif d'enregistrement de donnees, procede d'enregistrement de donnees et support d'enregistrement contenant un programme - Google Patents

Dispositif d'enregistrement de donnees, procede d'enregistrement de donnees et support d'enregistrement contenant un programme Download PDF

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Publication number
WO2005041174A1
WO2005041174A1 PCT/JP2004/010486 JP2004010486W WO2005041174A1 WO 2005041174 A1 WO2005041174 A1 WO 2005041174A1 JP 2004010486 W JP2004010486 W JP 2004010486W WO 2005041174 A1 WO2005041174 A1 WO 2005041174A1
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WO
WIPO (PCT)
Prior art keywords
recording
area
setting
speed
information
Prior art date
Application number
PCT/JP2004/010486
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiyuki Sasaki
Original Assignee
Ricoh Company, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Company, Ltd. filed Critical Ricoh Company, Ltd.
Publication of WO2005041174A1 publication Critical patent/WO2005041174A1/fr

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Classifications

    • 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
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • 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
    • 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
    • G11B7/00456—Recording strategies, e.g. pulse sequences
    • 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
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • 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
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1278—Physical format specifications of the record carrier, e.g. compliance with a specific standard, recording density, number of layers, start of data zone or lead-out
    • 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
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1285—Status of the record carrier, e.g. space bit maps, flags indicating a formatting status or a write permission
    • 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
    • G11B2220/216—Rewritable discs
    • 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
    • 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
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • 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
    • G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
    • G11B2220/257—DVDs belonging to the plus family, i.e. +R, +RW, +VR

Definitions

  • Information recording apparatus information recording method, and recording medium recording program
  • the present invention relates to an information recording apparatus and an information recording apparatus for performing random recording on an information recording medium on which data can be overwritten, such as a CD-RW disc, a DVD-RW disc, a DVD + RW disc, and a DVD-RAM disc.
  • the present invention relates to a recording method and a recording medium on which a program is recorded.
  • phase change materials have a reversible change property, and are rapidly cooled after being given heat, become an amorphous (non-crystalline) state having a low reflectivity.
  • a crystal state with high reflectivity is obtained by gradually cooling the crystal, a mark in an amorphous state is formed with the crystal state as an unrecorded or erased state.
  • CD-RW discs and DVD + RW discs are so-called one-beam overwritable phase-change information recording media, and the erasing and re-recording steps can be performed by one focused light beam.
  • the overwriteable phase change medium in order to form an amorphous mark, it is necessary to heat the recording layer to a temperature equal to or higher than the melting point and then rapidly cool the recording layer. If the cooling rate is low, recrystallization is likely to occur. In general, the higher the recording speed, the higher the cooling speed, and the lower the recording speed, the lower the cooling speed.
  • the temperature distribution in the beam running direction and the mark width direction which is a direction perpendicular to the beam running direction, becomes steeper as the speed at the time of overwriting is generally higher. Is difficult to maintain for a certain period of time.
  • phase change type information recording medium can rewrite data, there is a problem that the recording performance required by the user is lower than that of the write-once type information recording medium.
  • phase change type information recording medium is commercially available with the entire surface unrecorded, so that it is not necessary to erase the recording mark in the case of the first recording.
  • phase change type information recording medium is in the initial state or in a completely erased and crystalline state, there is no need to perform erasing (overwriting) requiring crystallization. Focusing on the point that only recording (non-crystallization) is required, phase-change information recording is performed by performing the first recording (for example, formatting) on a commercially available optical disc at a higher speed than the recording speed at the time of overwriting. It enables the improvement of recording performance for media.
  • UDF Universal Disc Format
  • the background format in response to a format request from the user, only a part of the lead-in area is recorded (initial processing) and the format completion is notified to the user, and the remaining area is not accessed by the user. Use dummy time to record dummy data.
  • the processing up to the initial processing is performed in the foreground, and the processing after the initial processing is performed in the background.
  • the format completion is notified to the user when the initial processing is completed, the format is completed to the user after the initial processing, that is, the dummy data recording in all the remaining areas is completed. You need to behave.
  • the dummy data recording in the knock-ground format is started.
  • the dummy data recording by the format and the data recording requested by the user are performed in parallel.
  • Patent document 1 JP 2000-11380
  • Patent Document 2 JP-A-11-134799
  • the dummy data recording and the recording requested by the user are performed in a state where the data recorded area and the unrecorded area exist in the recording area at random.
  • the present invention has been made in view of the above points, and corrects the recording state of a recording area requested by a user for an information recording medium on which data is randomly recorded in an unrecorded area. It is an object of the present invention to make full use of the advantage that it is possible to perform recording only in an unrecorded area at high speed by discriminating and switching the speed.
  • Recording means for randomly recording data in a recording area of an information recording medium on which data can be overwritten, identification means for identifying a recorded area and an unrecorded area in the recording area,
  • An information recording apparatus comprising: setting means for setting an optimum recording speed in the recorded area and the unrecorded area identified by the identification means.
  • An information recording method comprising: a setting step of setting an optimum recording speed in the recorded area identified by the identification step with respect to a step and an unrecorded area.
  • An information recording apparatus, an information recording method, and a recording medium according to the present invention are capable of accurately identifying a recording state of a recording area requested by a user for an information recording medium in which data is randomly recorded in an unrecorded area, By switching between them, it is possible to make full use of the advantage that it is possible to perform recording only in the unrecorded area at high speed.
  • FIG. 1 is a block diagram showing a configuration of an information recording device according to an embodiment of the present invention.
  • FIG. 2 is a program configuration diagram.
  • FIG. 3 is a waveform diagram showing a laser emission waveform of one-beam overwrite in the information recording device shown in FIG. 1.
  • FIG. 4 is an explanatory diagram showing a recording process in a background format and a background format in the information recording device shown in FIG. 1.
  • FIG. 5 is a diagram showing a configuration of an FDCB for storing bitmap information of a DVD + RW disc 12.
  • FIG. 6 is an explanatory diagram showing a recording process in an area including an undefined area where a recorded area and an unrecorded area cannot be identified in the information recording apparatus shown in FIG.
  • FIG. 7 is an explanatory diagram showing a recording speed setting process in a case where a recorded area and an unrecorded area coexist within a predetermined range of at least the minimum recording unit or more after the start address in the information recording apparatus shown in FIG.
  • FIG. 8 is an explanatory diagram showing a recording process in the case where a background format is resumed on a DVD + RW disc on which a TLO has been recorded in the information recording apparatus shown in FIG. 1;
  • FIG. 9 is a flowchart showing a format process in the information recording device shown in FIG. 1.
  • FIG. 10 is a flowchart showing a data recording process in a background format in the information recording device shown in FIG.
  • FIG. 11 is a flowchart showing a day process in a background format in the information recording apparatus shown in FIG. 1.
  • FIG. 1 is a block diagram showing a configuration of an information recording apparatus according to an embodiment of the present invention. is there
  • This information recording device is an optical disk drive such as a DVD + RW drive for recording data on an information recording medium (optical disk) on which data can be overwritten, such as a DVD + RW disk, and a spindle motor for rotating the optical disk 12. And the like, a rotation control system unit 4 for controlling the rotation of the motor 1, and an optical pickup 2 for irradiating the optical disc 12 with a laser beam L for recording and reproducing data.
  • an optical disk drive such as a DVD + RW drive for recording data on an information recording medium (optical disk) on which data can be overwritten, such as a DVD + RW disk, and a spindle motor for rotating the optical disk 12.
  • a rotation control system unit 4 for controlling the rotation of the motor 1, and an optical pickup 2 for irradiating the optical disc 12 with a laser beam L for recording and reproducing data.
  • the information recording device includes an optical pickup control system section 6 for controlling the light emission drive of the laser beam L by the optical pickup 2, and a coarse movement motor for moving the optical pickup 2 in the radial direction of the optical disk 12. 3, a coarse motor control system unit 5 for controlling the rotational drive of the coarse motor 3, and a signal processing system unit 7 for controlling the input / output of the reproduction signal from the optical pickup 2 and the recording signal to the optical pickup 2.
  • a microcomputer controller 9 having the same functions as the CPU 30, the ROM 31, and the RAM 32. The controller 9 performs a process of an information recording method according to the present invention described later.
  • each of these means is realized by a recording unit 33, an identification unit 34, a setting unit 35, a background format unit 36, a knock ground format recording speed setting unit 37, and an interruption unit 38. Is done.
  • the information recording device temporarily stores data such as data to be recorded on the optical disk 12 and data reproduced from the optical disk 12, and temporarily stores the data when the controller 9 executes various processes. It also has a cache memory (buffer memory) 8 used as an area for storing data in an external memory, and an external interface 10 for exchanging data with an externally connected host computer 11.
  • a cache memory (buffer memory) 8 used as an area for storing data in an external memory
  • an external interface 10 for exchanging data with an externally connected host computer 11.
  • the host computer 11 is realized by a microcomputer having the same functions as the CPU 30, the ROM 31, and the RAM 32 as described above, and instructs the information recording apparatus to record data and reproduce data.
  • the host computer 11 also performs processing for generating recording data and using reproduction data obtained from the information recording / reproducing device.
  • the information recording medium 12 conforms to the DVD + RW standard (format of the rewritable DVD standard standardized by the DVD + RW Alliance).
  • DVD + RW disc 12 is hereinafter referred to as a DVD + RW disc 12.
  • the controller 9 performs minimum recording on the DVD + RW disc 12 as information on the positions of a recorded area and an unrecorded area that are mixed in an area where data is randomly recorded in the background format for formatting in the background.
  • the management table information (bit map information) indicating the data recording state by a 1-bit flag for each ECC block (16 sectors) as a unit is recorded in a predetermined area in the lead-in area on the DVD + RW disc 12.
  • the controller 9 reads the bitmap information from the lead-in area of the DVD + RW disc 12, holds the bitmap information in the cache memory 8, and receives a recording request from the host computer 11; Referring to the bitmap information, the recording area within the recording area is identified as a recording area or an unrecorded area. Data recording is performed by setting the optimum recording speed in the recorded area and the unrecorded area.
  • bitmap information does not exist in the lead-in area
  • data recording is performed randomly in an unrecorded area.
  • Any information recording device that retains information on the positions of the recorded area and the unrecorded area in the cache memory may be used, and the management table information (bitmap information) may not be in the form of a bitmap.
  • FIG. 3 is a waveform diagram showing a laser emission waveform of one-beam overwriting in the information recording device shown in FIG.
  • the laser emission waveform (write strategy) according to the multi-noise shown in the figure is applied to the 8/16 modulated EFM (NRZI) recording information (recording data).
  • the data (information) is recorded by irradiating and creating two states with different reflectivities, crystalline state (erased) and amorphous state (recorded), as shown in the group in the figure.
  • Period A is a repetitive multi-pulse waveform of write power Pw and read power Pr, and a pit train having a width of 3T to 11T is formed depending on the pulse length (number of pulses) of the repetitive multipulse.
  • the crystal state between the pits is formed by the laser light of erase power Pe.
  • 8/16 modulated pits similar to those of a read-only DVD are formed, and the recorded information can be reproduced according to the read signal shown in FIG.
  • dummy data recording is performed by referring to the bitmap information and avoiding a recorded area where data from the host computer 11 is randomly recorded.
  • recording in the format is basically recording in an unrecorded area (however, when a DVD + RW disc being formatted is inserted, one ECC block immediately before the recorded area becomes an undefined area). It is possible to perform faster than the speed at which overwriting is possible. Therefore, the controller 9 sets the recording speed at the time of formatting in the background to a higher recording speed than the recording speed at which data can be overwritten, and performs the formatting.
  • FIG. 4 shows a background format and a background format in the information recording apparatus shown in FIG.
  • FIG. 9 is an explanatory diagram showing a recording process during a ground format.
  • the controller 9 When receiving a format request from the host computer 11 for the blank DVD (unrecorded) DVD + RW disc 12, the controller 9 reads the lead-in area (Lead in Area) on the DVD + RW disc 12. ) Is only recorded (initial processing), the format completion is notified to the host computer 11, and then the unrecorded area (data area) in the recording area is recorded with dummy data. (See (a) in Fig. 4).
  • the FDCB (Formatting) is an area for storing management table information (bitmap information) on the positions of a recorded area and an unrecorded area that are mixed in an area where data is randomly recorded in the background format.
  • Disc Control Cock is recorded in a predetermined area in the lead-in area, and bitmap information is recorded in the FDCB by data recording and format.
  • the bitmap information in the FDCB is copied into the cache memory 8.
  • the controller 9 Since the initial processing for a blank disk is recording in an unrecorded area, the controller 9 sets the recording speed for formatting in the background higher than the recording speed at which data can be overwritten. Set the recording speed (recording speed higher than the overwrite speed) and format.
  • the controller 9 when the controller 9 receives a data recording request from the host computer 11 after notifying the host computer 11 of the completion of the format, the controller 9 suspends the dummy data recording and stops the requested data recording (( (b) user data) (see (b) in Fig. 4).
  • the controller 9 refers to the FDCB bitmap information in the cache memory 8 to identify the recording state of the requested recording area and switch the recording speed.
  • the controller 9 identifies the area designated as the recording destination in the recording area as a recording area or an unrecorded area based on the bitmap information, and determines the recording area as the recording area according to the identification result. Data recording is performed by setting an optimum recording speed in an unrecorded area.
  • the recording area where the host computer 11 has requested the recording of the user data is all the unrecorded area, and the controller 9 sets the first recording speed at which overwriting is possible (overwriting).
  • User data recording is performed at the second recording speed higher than (speed).
  • the bitmap information corresponding to the recording area is “recorded”.
  • the area where the recording is not performed is recorded by the dummy data.
  • the dummy data recording is basically a recording in an unrecorded area, and is performed by the controller.
  • the dummy data recording in the format is a recording in an area that has been confirmed to be unrecorded by the bitmap information, and is basically a recording in an unrecorded area. No problem.
  • the bitmap information corresponding to the position information of the recording area is set to "recorded".
  • the controller 9 sends the area A1 from the bitmap information in the cache memory 8 to the area A1. Is a recorded area and the area A2 is an unrecorded area.
  • the controller 9 first shifts the area A1 to a first recording speed (overwriting speed) at which overwriting is possible (overwriting is possible), and Then, the area A2 is shifted to a second recording speed higher than the overwrite speed (first recording speed) to record user data.
  • the optimum recording state can be obtained. Recording can be performed by setting the recording speed.
  • FIG. 5 is a diagram showing a configuration of the FDCB for storing bitmap information of the DVD + RW disc 12.
  • the FDCB is data management information composed of 1 ECC blocks (16 sectors) for storing general information related to recording in the background format, and is a predetermined area in the lead-in area. Is recorded to
  • the content 'descriptor (Contents Descriptor) is an ID indicating what DCB the DCB is.
  • drive ID (Drive ID) information on the information recording device that records the FDCB is recorded.
  • FDCB update count is information on the background format and is information specific to the FDCB.
  • Formatting "Status” and “mode” indicates the status of the background format (during formatting, completion of format, or recording status of lead-out).
  • the last written address is a continuous data record.
  • the last "verified” address (Last verified address (LVA)) is the last address that is continuously verified. If verification is not performed, "00" is recorded.
  • bitmap start address (Bitmap start address) is an address in the data area indicated by the first bit of the bitmap area.
  • Bitmap 'length indicates the size of the effective bitmap area. You. The entity of the bitmap area is recorded in the formatting bitmap, and the information of the recording area and the unrecorded area that are mixed in the data area is stored in this area.
  • the area managed by the bitmap information of the DVD + RW disc 12 ranges from the address specified by the bitmap 'start' address (Bitmap start address) to the bitmap length (Bitmap length).
  • the data in the area before the address indicated by the bitmap start address (Bitmap start address) must be recorded.
  • bitmap 'start' address (Bitmap start address) must be set before the LWA.
  • the disc ID (Disc ID) records # 3 information unique to the disc.
  • the application dependent (Application dependent) is reserved as an area for recording information to be used for a specific purpose in the future, and "00" is recorded.
  • List of DCBs (List of DCBs) records DCB information existing in the lead-in area.
  • the DVD + RW disc 12 can record up to 16 types of DCBs on the disc, and the list "DCBs" (List of DCBs) contains the content of each DCB "Descriptor (Content Descriptor)". Is recorded.
  • bitmap information in the FDCB is copied in the cache memory 8 of the information recording device, and the bitmap information in the cache memory 8 is updated after data recording.
  • bitmap information does not exist on the disc
  • an information recording apparatus that randomly records data on an information recording medium
  • the position of the recorded area and the unrecorded area in the cache memory is determined. Any device may be used as long as it is an information recording device that holds information about the information.
  • the information recording apparatus performs recording by setting an optimal recording speed by using information on the data recording (information on the positions of the recorded area and the unrecorded area mixed in the data area). That is, when a recording request is issued from the host computer, the information recording apparatus identifies the recording state (recorded area or unrecorded area) in the recording area, and randomly records the information in the unrecorded area.
  • the data recording can be performed at the optimum recording speed even in the information recording device that performs the recording. For example, if data is recorded in the recording area, the information recording device records at a recording speed at which overwriting is possible, and if no data is recorded, the information recording device records at a recording speed higher than the overwriting recording speed. Records can be made.
  • the information recording apparatus needs to generate predetermined data (dummy data recording pattern) and transfer it to the host computer 11. There is.
  • the information recording device When reading recorded data, the information recording device performs a seek operation to move the optical pickup in front of a sector which is a target reproduction area (reproduction target address).
  • the address information on the RW disk 12 is traced, and the read data is taken into the cache memory 8 inside the information recording device (drive) from the time when the reproduction target address is detected.
  • the information recording device acquires the spindle servo signal and the address signal by referring to the frame synchronization signal and the position signal in the read data. Therefore, in order to reproduce the data from the target address normally, When tracing the target address, the address signal must be obtained normally.
  • the minimum recording unit on the DVD + RW disc 12 is used as information on the positions of a recorded area and an unrecorded area that are mixed in the area recorded randomly in the background format.
  • the management table information (bitmap information) indicating the data recording state by a 1-bit flag for each ECC block is recorded in a predetermined area in the lead-in area.
  • the bitmap information corresponding to the recorded area is changed to a state indicating “recorded”. Make it mandatory.
  • the information recording device can record only the unrecorded area with dummy data by referring to the bitmap information.
  • the bitmap information on the area recorded by the host computer must be changed to "recorded”, but the bitmap information corresponding to the run-in block recorded immediately before the requested recording area is required. It is not determined whether the bitmap information to be changed is changed to "recorded” or remains as “unrecorded”.
  • the bitmap information corresponding to the run-in block is "recorded" and the requested reproduction area is the run-in block, the area immediately before that area is also unrecorded. Therefore, the information recording device cannot read normally.
  • this area is not the area where the host computer has performed recording, so the information recording device must generate a dummy data pattern and transfer it to the host computer.
  • this area is a run-in block. This is because there is no means for discriminating the presence or absence of user data, and dummy data cannot be generated.
  • the information recording device can generate dummy data and transfer it to the user. Since the run-in block is not the area where the user has recorded, there is no problem with the information recording device transferring dummy data.
  • the information recording device determines the recording state (recorded area or unrecorded area) of this area.
  • bitmap information corresponding to the run-in block is set to "recorded"
  • the information recording apparatus is unrecorded immediately before the recording area determined from the bitmap information. It is possible to record at a high recording speed, but conversely, if the bitmap information power corresponding to the run-in block is set to "unrecorded", the information recording device determines from the bitmap information. Immediately before the already recorded area, data is recorded.
  • the controller 9 sets and records a first recording speed at which data can be overwritten as a recording speed in an undefined area where a recorded area and an unrecorded area cannot be identified.
  • FIG. 6 is an explanatory diagram showing a recording process in an area including an undefined area where a recorded area and an unrecorded area cannot be identified in the information recording apparatus shown in FIG. [0118]
  • the DVD + RW disc 12 in the middle of formatting is inserted, and as shown in Fig. 6 (a), the controller 9 reads the area A from the bitmap information in the FDCB in the lead-in area. Is a recorded area, area B is an unrecorded area, area C is a recorded area, and area D is an unrecorded area.
  • the area B is divided into an unrecorded area B1 and an undefined area B2, as shown in FIG.
  • the controller 9 sets the unrecorded area B1 at an overwriting speed (a first recording speed at which data can be overwritten). Also, set a high second recording speed, record at the second recording speed, and set an overwrite speed for the undefined area B2 and record at the first recording speed at which the data can be overwritten. For area D, set a recording speed higher than the overwrite speed and record.
  • the controller 9 can avoid a problem that the recorded data cannot be read out by performing the high-speed recording when the data is recorded in the undefined area B2.
  • the controller 9 reduces the risk of recording the already recorded area at high speed. It is possible to avoid.
  • the data recording state of one ECC block immediately before the recording area determined from the bitmap information cannot be determined strictly for the reasons described above.
  • the speed at which the controller 9 can overwrite recording in such an area thus, it is possible to guarantee that the recorded data is normally read regardless of whether the recording state of the area is a recorded area or an unrecorded area.
  • the controller 9 overwrites data when a recorded area and an unrecorded area exist within a predetermined range of at least the minimum recording unit or more after the recording start address for starting recording on the DVD + RW disc 12. Set the first recording speed at which recording is possible.
  • FIG. 7 shows a recording speed setting process when a recorded area and an unrecorded area are mixed within a predetermined range of at least the minimum recording unit or more after the start address in the information recording apparatus shown in FIG. FIG.
  • the controller 9 refers to the bitmap information in the FDCB in the cache memory 8 and, as shown in (a ′) of FIG.
  • the controller 9 determines from the bitmap information that the area A1 of the predetermined range A is an unrecorded area, the area A2 is a recorded area, It is assumed that the area A3 is an unrecorded area, the area A4 is a recorded area, the area A5 is an unrecorded area, the area A6 is a recorded area, and the area A7 is an unrecorded area. I do.
  • the controller 9 starts recording on the area 20 where recording of the DVD + RW disc 12 is started. If a predetermined number of recorded and unrecorded areas are present in the specified range A after the start address, set the overwrite speed (the first recording speed at which data can be overwritten) and record. Gear shifts do not occur.
  • the controller 9 refers to the bitmap information in the same manner as described above, and Detects the recording state of the predetermined range A after the recording start address of.
  • the controller 9 sets the recording speed higher than the overwrite speed and performs the recording. I do.
  • the controller 9 determines the recording state in a predetermined range after the recording start address, thereby enabling the recording to be performed with the optimum speed set.
  • the predetermined range targeted for the recording state identification may be set to an optimum range for each information recording device.
  • the recording range may be switched between recording by a user request and recording of dummy data by a background format.
  • the setting may be made variable.
  • the recording start address may be included in the already recorded area.
  • the controller 9 performs recording by setting, for example, a recording speed at which overwriting is possible, and when the recording area is switched to an unrecorded area, the recording state for a predetermined range after the switching address is changed. Can be determined again to determine whether to change the recording speed.
  • the controller 9 may set the overwriting speed when the switching position between the recorded area and the unrecorded area is equal to or more than a predetermined number within a predetermined range.
  • the controller 9 performs recording at a speed at which overwriting can be performed, thereby preventing the recording performance from being degraded due to shifting. Can be prevented.
  • the controller 9 performs recording at a speed at which overwriting can be performed, thereby preventing the recording performance from being degraded due to shifting. Can be prevented.
  • the bitmap information of the DVD + RW disc indicates that recording has been performed up to the TLO start address, and that no recording has been performed after the TLO start address.
  • the TLO (dummy data having the lead-out attribute) is recorded and the format of the DVD + RW disc is resumed, the TLO is set to the dummy (having the user data attribute). Overwrite with data.
  • the controller 9 sets a recording speed at which data can be overwritten as the recording speed when the background format is restarted by overwriting the TLO, and recording is performed.
  • the controller 9 identifies the TLO as a recorded area, and sets a recording speed higher than a recording speed at which data can be overwritten for recording in an area after the TLO.
  • the controller 9 is provided when the DVD + RW disc 12 is being formatted. Set the recording speed at which data can be overwritten and record.
  • FIG. 8 is an explanatory diagram showing a recording process when the background format is restarted on the DVD + RW disc on which the TLO is recorded in the information recording apparatus shown in FIG.
  • the TLO size is not defined in the DVD + RW disc 12, and information indicating the TLO area does not exist in the FDCB. For example, when formatting is resumed, the DVD + RW disc 12 is searched. By doing so, the TLO area can be specified.
  • the controller 9 can specify the TLO area as shown in (a) of Fig. 8.
  • the controller 9 When restarting the background format for such a DVD + RW disc 12, the controller 9 overwrites the TLO and records dummy data.
  • the controller 9 records the TLO, which is the area A, at a recording speed capable of overwriting before completing the formatting, and interrupts the formatting in the background.
  • the overwriteable recording speed recording speed at which data can be overwritten.
  • bitmap information indicating recorded or unrecorded in the data area is cleared, initial information is recorded, and dummy data is recorded (overwritten) in the data area.
  • D + RW disc is formatted from a blank state or if the formatted disc is being reformatted.
  • the controller 9 sets a recording speed at which data can be overwritten and records the data.
  • the controller 9 records information indicating that it has been reformatted in a predetermined area of the DVD + RW disc 12.
  • the controller 9 sets a recording speed at which data can be overwritten, and records the data.
  • FIG. 9 is a flowchart showing a format process in the information recording device shown in FIG.
  • Controller 9 formats data from the host computer in step (indicated by "S" in the figure) 1 Upon receiving the request, step 2 determines whether the format requested by the host computer is a new format or a format restart.
  • step 2 When the host computer determines in step 2 that a new format has been requested
  • step 2 determine whether the DVD + RW disc inserted in step 3 is a blank disk.
  • step 3 If it is determined in step 3 that the disc is not a blank disc, the re-use (Re_use) bit is set in step 4 to indicate that the disc has been reformatted in the FDCB, and in step 5, the overwrite speed (data Set the overwriteable recording speed), record the initial area in step 6, notify the host computer of the format completion report in step 7, and shift to the background format processing shown in FIG.
  • the overwrite speed data Set the overwriteable recording speed
  • step 3 If it is determined in step 3 that the inserted DVD + RW disc is a blank disc, the recording speed is higher than the overwriting speed in step 8 (the recording speed is higher than the recording speed at which data can be overwritten). (High-speed recording speed), record the initial area in step 6, report the format completion report to the host computer in step 7, and shift to the background format processing shown in Fig. 10.
  • step 2 if the host computer requests format resumption in the processing of step 2 (when N is N in step 2), it is determined whether or not the DVD + RW disc inserted in step 9 is being formatted. .
  • step 9 If it is determined in step 9 that the disc is not a DVD + RW disc being formatted, an error is reported to the host computer in step 11, and this process is completed (terminated). If it is determined in step 9 that the disc is a DVD + RW disc that is in the process of being formatted, the FDCB information is updated to the information that is being formatted in the background in step 10, and the host computer is formatted in step 7. Notify the completion report and move to the background format processing shown in Fig. 10.
  • the information is recorded on the DVD + RW disc, so that when a disc that is being formatted is inserted, the management table indicating the recorded area and the unrecorded area is displayed. The validity of the information can be determined, and the high-speed recording for the unrecorded area can be fully utilized.
  • FIG. 10 is a flowchart showing a data recording process in a background format in the information recording device shown in FIG.
  • the controller 9 determines in step (indicated by "S" in the figure) 12 whether or not there is a recording request power S from the host computer.
  • controller 9 determines in the processing of step 12 that a recording request has been received from the host computer, it determines in step 13 whether or not recording is in progress.
  • step 13 the controller 9 determines whether or not dummy data is being recorded in the background format.
  • step 13 If the controller 9 determines that the day ice is being performed in the process of step 13, the day ice process is interrupted in step 14, and the FDCB is updated in step 15. This is because bitmap information, LWA, etc. are changed due to recording by the digital eye. Step 14 corresponds to an interruption step or an interruption procedure. [0190] If the controller 9 determines in the process of step 13 that the vehicle is not in the ice condition, it skips the processes of steps 14 and 15 and proceeds to step 16.
  • step 16 the controller 9 acquires the recording address A u and the recording size Su requested by the host computer, and proceeds to the recording processing in step 17 and subsequent steps.
  • the controller 9 first determines in step 17 whether the DVD + RW disc has been formatted from the blank state or whether the formatted disc has been reformatted. Judge by referring to the reuse bit in FDCB
  • the controller 9 determines in step 17 whether or not the reuse bit is set. If the reuse bit is set, the controller 9 determines in step 27 that the overwriting speed (data overwriting) has been performed. Set the recording speed (the first recording speed at which recording is possible), record, and return to step 12.
  • step 17 if the controller 9 determines that the reuse bit is not set, then in step 18, the recording address Au requested by the host computer is an address in an unrecorded area. Determine whether or not.
  • step 18 when the controller 9 determines that the recording address Au is not an address in the unrecorded area, that is, when the recording address Au requested from the host computer is a recorded area or an undefined area.
  • step 19 the predetermined range after the recording area requested by the host computer is changed. It is determined whether or not the area is an unrecorded area, that is, whether or not a recorded area or an undefined area exists in the area.
  • step 27 determines in step 27 that the overwrite speed (data overwrite Set the recording speed (the first recording speed at which recording is possible), perform recording, and return to step 12.
  • the overwrite speed data overwrite Set the recording speed (the first recording speed at which recording is possible)
  • step 20 The controller 9 determines whether the recording address Au requested by the host computer is an address in the TLO.
  • step 27 the overwriting speed (the first recording speed at which data can be overwritten) is set. To record and return to step 12.
  • step 17 to step 20 described above corresponds to an identification step or an identification procedure.
  • step 20 if the controller 9 determines that the recording address Au is not an address in the TLO, then in step 21, the recorded address after the recording address Au requested by the host computer is recorded.
  • the start address Aw of the area or the undefined area is detected and obtained, and the controller 9 determines whether or not the recording area requested by the host computer includes the start address Aw in step 22, ie, whether Au + Su> Aw. Judge.
  • step 23 If the controller 9 determines that the recording area requested by the host computer does not include the start address Aw in the process of step 22, that is, Au + Su> Aw, the controller 9 proceeds to step 23. The process is skipped, and recording is performed in step 24 by setting a recording speed higher than the overwriting speed (the first recording speed at which data can be overwritten). Steps 24 and 27 correspond to a setting step and a recording step or a setting step and a recording step.
  • step 25 the controller 9 determines whether there is an unrecorded area among the recording areas requested by the host computer, that is, whether there is any remaining recording.
  • step 12 If it is determined in step 12 that there has been no recording request from the host computer, the controller 9 shifts to the de-ice processing in the background format shown in Fig. 11.
  • the overwrite speed may be set.
  • FIG. 11 is a flowchart illustrating the data ice processing in the background format in the information recording apparatus shown in FIG.
  • the controller 9 determines in step (indicated by "S" in the figure) 28 whether or not the ice is under ice.
  • step 28 If it is determined in the process of step 28 that the vehicle is in the dry state, the process returns to step 12 of Fig. 10 and the controller 9 determines whether or not there is a recording request from the host computer.
  • step 29 the controller 9 determines whether or not an unrecorded area exists.
  • step 29 If it is determined in step 29 that there is an unrecorded area, the controller 9 acquires the FDCB force and LWA in step 30 and refers to the FDCB bitmap information in step 31 to perform de-ice. Obtain and determine the size Sd.
  • step 32 the controller 9 checks whether the DVD + RW disc has been formatted from a blank state or whether the formatted disc has been reformatted in the FDCB. Judge by referring to the reuse bit. That is, it is determined whether or not the reuse bit is set.
  • step 32 If it is determined in step 32 that the reuse bit is set, the controller 9 sets the overwrite speed (the first recording speed at which data can be overwritten) in step 41. Make a record of the ice cream and return to step 12 in Figure 10 to the host computer. Determine if there is a force recording request.
  • the overwrite speed the first recording speed at which data can be overwritten
  • step 32 determines in next step 33 whether the LWA is an address in TL #.
  • step 33 If it is determined in step 33 that the LWA is an address in the TLO, the controller 9 obtains the end address At of the TL ⁇ in step 38, and in step 39, the de-ice area sets the end address At. It is determined whether or not LWA + Sd> At.
  • step 33 determines in the next step 34 whether the LWA is an address in the undefined area. .
  • an area of one ECC block before the start address of the recorded area acquired from the bitmap area is an undefined area.
  • step 34 If it is determined in step 34 that the LWA is an address in the undefined area, the controller 9 sets the overwrite speed (the first recording speed at which data can be overwritten) in step 41. Then, record the day ice and return to step 12 in FIG. 10 to judge whether or not there is a recording request from the host computer.
  • the overwrite speed the first recording speed at which data can be overwritten
  • step 34 If it is determined in step 34 that the LWA is not an address in the undefined area, the controller 9 determines in step 35 whether an undefined area exists within a predetermined range after the LWA. I do.
  • the controller 9 determines in the process of step 35 that an undefined area exists within the predetermined range, the controller 9 sets the overwrite speed (the first recording speed at which data can be overwritten) in step 41. After setting, record the ice cream, return to step 12 in Fig. 10, and return to the host computer. To determine whether there is a recording request from the data.
  • the overwrite speed the first recording speed at which data can be overwritten
  • step 32 to step 35 described above corresponds to a background format recording speed setting step or a background format recording speed setting procedure.
  • Step 37 and step S41 correspond to a background formatting step or a background formatting procedure.
  • step 12 in FIG. 10 After the start of the de-ice process, the process returns to step 12 in FIG. 10 to determine again whether or not there is a recording request from the host computer.
  • step 29 If it is determined in step 29 that there is no unrecorded area, this process is completed (terminated).
  • the overwrite speed can be set.
  • the information recording apparatus, the information recording method, and the program according to the present invention include a management unit that manages information about random data recording, and performs recording in an unrecorded area at a speed higher than a speed at which overwriting is possible. It can be applied to all information recording devices. It can also be applied to personal computers such as desktop personal computers and notebook personal computers.

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

L'invention concerne un dispositif de commande (9) conçu pour identifier une zone préalablement enregistrée et une zone vierge dans une zone d'enregistrement d'après des données en mode point dans un FDCB sur le disque DVD+RW (12) utilisé en tant que support d'enregistrement de données sur lequel il est possible de procéder à une réécriture. Lors de l'enregistrement des données sur la zone préalablement enregistrée, le dispositif de commande (9) fixe une première vitesse d'enregistrement à laquelle les données peuvent être écrasées. Lors de l'enregistrement des données sur la zone vierge, le dispositif de commande (9) fixe une seconde vitesse d'enregistrement plus rapide que la première vitesse d'enregistrement. Ainsi, les données sont enregistrées de manière aléatoire.
PCT/JP2004/010486 2003-10-22 2004-07-23 Dispositif d'enregistrement de donnees, procede d'enregistrement de donnees et support d'enregistrement contenant un programme WO2005041174A1 (fr)

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JP2003362061A JP2005129120A (ja) 2003-10-22 2003-10-22 情報記録装置と情報記録方法とプログラム

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JP4828548B2 (ja) * 2005-12-21 2011-11-30 パイオニア株式会社 情報記録装置及び方法
WO2007091618A1 (fr) * 2006-02-10 2007-08-16 Pioneer Corporation Dispositif et méthode d'enregistrement d'informations, programme informatique et support d'enregistrement d'informations
JP4719801B2 (ja) * 2009-03-06 2011-07-06 富士通株式会社 デバイス管理装置、デバイス初期化方法、デバイス初期化プログラムおよびデバイスシステム

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Publication number Priority date Publication date Assignee Title
JP2002352435A (ja) * 2001-05-23 2002-12-06 Toshiba Corp 情報記録媒体、情報記録装置、及び情報記録方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352435A (ja) * 2001-05-23 2002-12-06 Toshiba Corp 情報記録媒体、情報記録装置、及び情報記録方法

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