WO2015087467A1 - 光ディスク記録方法、光ディスク装置、および光ディスク媒体 - Google Patents
光ディスク記録方法、光ディスク装置、および光ディスク媒体 Download PDFInfo
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- WO2015087467A1 WO2015087467A1 PCT/JP2014/004252 JP2014004252W WO2015087467A1 WO 2015087467 A1 WO2015087467 A1 WO 2015087467A1 JP 2014004252 W JP2014004252 W JP 2014004252W WO 2015087467 A1 WO2015087467 A1 WO 2015087467A1
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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
- G11B20/12—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
- G11B20/1252—Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
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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
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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
- 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
- G11B7/0079—Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas
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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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
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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
- G11B2007/00754—Track shape, e.g. address or synchronisation information in wobbled track or sidewall
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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
- G11B2020/1218—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc
- G11B2020/1242—Formatting, e.g. arrangement of data block or words on the record carriers on discs wherein the formatting concerns a specific area of the disc the area forming one or more zones, wherein each zone is shaped like an annulus or a circular sector
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- 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
- G11B2020/1267—Address data
- G11B2020/1268—Address in pregroove [ADIP] information
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- 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
- G11B2020/1277—Control data, system data or management information, i.e. data used to access or process user data for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones
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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
- G11B2020/1291—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting serves a specific purpose
- G11B2020/1294—Increase of the access speed
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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
- G11B7/005—Reproducing
- G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
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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
- G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
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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
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
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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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24082—Meandering
Definitions
- the present disclosure relates to an optical disc medium on which data is optically recorded, a recording method for recording / reproducing data on the optical disc medium, and an optical disc apparatus.
- optical disks such as DVDs and Blu-ray (registered trademark) disks (hereinafter referred to as BDs) are used as information recording media for storing video or data.
- BDs Blu-ray (registered trademark) disks
- HDDs hard disk devices
- magnetic tapes magnetic tapes.
- the use of optical discs is expanding from the conventional use of recording AV (Audio Video) data such as video or audio to the use of storing data for a long period of time.
- AV Audio Video
- the amount of data that can be stored per volume of an optical disk is only about 1/3 of that of an HDD or magnetic tape. Therefore, from the viewpoint of space efficiency at the time of storage, there has been a demand for technical development to improve the capacity of data that can be stored per volume without increasing the cost of the optical disc, and research and development has been continued energetically. Recently, among BDs, BDXL having a recording density of about 33.4 GB per layer has been put on the market as an optical disk with the highest volume recording density.
- optical discs can store data for 50 years or more. From the viewpoint of long-term storage of data, these optical discs have a storage reliability of 10 times or more compared to the life of HDD of about 5 years. Therefore, by moving data for long-term storage from the HDD to the optical disk, it is possible to achieve both long-term storage reliability and reduction in storage cost. In particular, compared with HDDs that consume power when storing data, optical discs that do not require power when storing data can reduce carbon dioxide emissions as green storage, and power consumption in data centers has become a major problem in recent years. It also leads to reducing
- the address information recorded by the wobbling of the groove track has the same number of address information per track from the inner circumference to the outer circumference, and the density of the address information per track length is on the outer circumference. It gets lower.
- the recording surface of the optical disk medium is divided into a plurality of zones in the radial direction in order to make the recording density substantially constant within the recording surface of the optical disk medium. I manage. Specifically, in the generation of a recording clock for recording data from the wobble signal obtained from the wobbling of the track, by setting the frequency of the recording clock to a predetermined magnification corresponding to the radius ratio with respect to the frequency of the wobble signal, The recording density is almost constant in each zone.
- FIG. 6 is a diagram for explaining an arrangement structure of data and addresses with respect to an optical disk medium in Patent Document 1 which is a conventional technique.
- FIG. 6 shows an arrangement structure in the vicinity of the boundary between zones A-1 and A, which are adjacent zones.
- Zone A-1 has a range of ADIP (ADdress In Pregroove) indicating addresses indicating the positions of tracks arranged by wobbling, and N-4, N-3, N-2, N-1, and zone A , ADIP ranges are N, N + 1, N + 2, N + 3.
- ADIP Address In Pregroove
- the length of ADIP differs from the length of recorded data. Therefore, ADIP and data address are not in a one-to-one relationship.
- While recording and managing recorded data continuously in any zone when recording data for the first time in any zone, the recording start position is determined from ADIP, and then data is additionally recorded in the same zone. In this case, an additional recording start position is determined from the data address information of the recorded data, and linking recording is performed. Thereby, data can be recorded even if the length of ADIP is different from the length of data.
- FIG. 7 is a diagram showing a configuration of an optical disc device 70 in Patent Document 1 which is a conventional technique.
- an optical disk device 70 includes an optical disk medium 700, an optical head 701, a spindle motor 702, a servo controller 703, a reproduction PLL (Phase Locked Loop) circuit 704, a data demodulation circuit 705, an error correction decoding circuit 706, and a laser driving circuit 707.
- I / F interface
- Spindle motor 702 rotates optical disk medium 700.
- the optical head 701 records data on the optical disk medium 700 and reproduces data from the optical disk medium 700.
- the servo controller 703 controls the optical head 701 and the spindle motor 702 to control the light beam irradiated from the optical head 701 onto the optical disc medium 700 to be condensed and scanned on a track provided on the optical disc medium 700. , Move control to access the target track.
- the I / F circuit 715 receives recording data to be recorded on the optical disc medium 700 from the host 716 and sends reproduction data reproduced from the optical disc medium 700 to the host 716.
- the error correction encoding circuit 709 adds a parity for error correction to the recording data received from the I / F circuit 715.
- the data modulation circuit 708 modulates the recording data including the parity from the error correction coding circuit 709 according to a predetermined modulation rule, and converts the recording data into a recording pattern to be recorded on the optical disc medium 700.
- the laser driving circuit 707 converts the recording pattern modulated by the data modulation circuit 708 into an optical pulse to drive the laser of the optical head 701 in order to accurately form a mark on the optical disc medium 700.
- the wobble detection circuit 710 extracts a wobble signal by filtering from the reproduction signal of the optical disc medium 700.
- the wobble PLL circuit 711 generates a wobble clock by multiplying the wobble signal by a predetermined magnification.
- the ADIP reproduction circuit 713 reproduces ADIP information from the wobble signal and the wobble clock.
- the channel PLL circuit 712 operates so that the phase of the clock obtained by dividing the wobble clock by m and the phase of the clock obtained by dividing the recording clock by n are synchronized to generate a recording clock having a frequency of n / m.
- the reproduction PLL circuit 704 extracts a synchronous clock for demodulating the reproduction signal from the optical disc medium 700.
- the data demodulation circuit 705 demodulates the recorded data from the reproduction signal.
- the error correction decoding circuit 706 corrects and recovers errors in the demodulated data.
- the system controller 714 controls each block and also controls communication with the host 716.
- the system controller 714 controls each unit of the optical disc device 70 so as to record data based on the recording clock generated by the channel PLL circuit 712.
- the data modulation circuit 708, the laser drive circuit 707, and the optical head 701 record data based on the recording clock.
- the I / F circuit 715 acquires the recording data transmitted from the host 716.
- the error correction encoding circuit 709 adds a parity code for correcting an error during reproduction to the recording data transferred through the I / F circuit 715.
- the data modulation circuit 708 modulates the recording data to which the parity code is added into a recording pattern in accordance with, for example, a modulation rule of 1-7PP code which is one of run length limited codes.
- the laser driving circuit 707 converts a recording pattern modulated by a 1-7PP code into 2T to 9T recording marks and spaces into a castle-type pulse waveform in order to accurately form recording marks on the optical disc medium 700. Conversion is performed and a drive signal for driving the laser is output to the optical head 701.
- the optical head 701 records a recording pattern by irradiating the optical disk medium 700 with a laser pulse.
- the optical disc medium 700 has a structure in which ADIP is given in a radial pattern. Therefore, the recording clock for recording data is controlled so that the linear density of the recording data in the recording surface of the optical disc medium 700 is substantially constant.
- the channel PLL circuit 712 controls the recording clock.
- the wobble detection circuit 710 detects a wobble signal corresponding to the wobbling of the track.
- the wobble PLL circuit 711 generates a wobble clock synchronized with the wobble signal based on the wobble signal.
- the channel PLL circuit 712 operates so that the phase of the clock obtained by dividing the wobble clock by m and the phase of the clock obtained by dividing the recording clock by n are synchronized, and the recording clock having a frequency n / m times the wobble clock is generated. Generate.
- the recording surface of the optical disc medium 700 is divided into a plurality of zones in the radial direction. In a plurality of zones, the frequency of the recording clock or the recording speed is changed.
- the system controller 714 matches the recording start position of the recording pattern recorded on the optical disc medium 700 with the ADIP boundary at each start position of the plurality of zones.
- the data demodulating circuit 705 demodulates the already recorded recording pattern, detects the synchronization mark and data address included therein, and locates the position with 1T accuracy. Identify. With the position specified by the data demodulation circuit 705 as a reference, a newly recorded recording pattern is recorded so as to be continuous from the end position of the already recorded recording pattern. By continuously writing, the recorded data in the zone can be reproduced without interruption while detecting the data address and confirming the continuity.
- zone A-1 In the vicinity of the boundary between zone A-1 and zone A in FIG. 6, in zone A-1, recording patterns are continuously recorded with data addresses M-2 and M-1. At the start position of zone A, the boundary between ADIP N and the data address M of the recording pattern coincides, and the recording pattern is continuously recorded at data address M + 1. Further, when a new recording pattern is recorded next, it is recorded continuously at the data address M + 2.
- the same optical disk medium while changing the data linear density.
- the capacity of the optical disk medium can be increased only by the recording / playback signal processing technique without substantially changing the structure of the optical disk medium, and the storage cost can be reduced.
- the optical disc recording method of the present disclosure is an optical disc recording method in which data is divided into predetermined block units and recorded on an optical disc medium.
- the optical disc medium has a track on which data is recorded, formed by wobbling, in the radial direction. It is divided into a plurality of zones, and a clock ratio n / m (n, m: a natural number of 1 or more) of the recording clock to the wobble clock is preset for each zone, and a wobble signal corresponding to wobbling from the optical disk medium is set.
- the data address current position is specified from the current position, the ADIP start position of the recording target zone, the data address start position of the recording target zone, and the clock ratio n / m, and the recording start position is specified based on the data address current position.
- a step of recording data from the recording start position of the recording target zone.
- the current position of the data address can be specified from the current position of the ADIP regardless of the linear density of the data, so that the track density and the linear density can be increased without degrading the access performance.
- FIG. 1 is a diagram illustrating a configuration of an optical disc device according to an embodiment.
- FIG. 2 is a diagram showing zones of the optical disk medium according to the embodiment.
- FIG. 3 is a diagram showing a state in which a plurality of blocks are recorded on the optical disc medium according to the embodiment.
- FIG. 4 is a diagram showing a data and address arrangement structure for the optical disc medium in the embodiment.
- FIG. 5 is a diagram showing the configuration of the data address of the present embodiment.
- FIG. 6 is a diagram for explaining an arrangement structure of data and addresses with respect to a conventional optical disk medium.
- FIG. 7 is a diagram showing a configuration of a conventional optical disc apparatus.
- the present disclosure has been made to solve the above-described problem, and can improve both track density and linear density without degrading access performance in data recording / reproduction, and can record data on the volume of an optical disk medium. It is an object of the present invention to provide an optical disc recording method, an optical disc apparatus, and an optical disc medium that improve density.
- FIG. 1 is a diagram showing a configuration of an optical disc apparatus 20 in the present embodiment. 1 includes an optical head 201, a spindle motor 202, a servo controller 203, a reproduction PLL circuit 204, a data demodulation circuit 205, an error correction decoding circuit 206, a laser drive circuit 207, a data modulation circuit 208, an error correction code.
- Spindle motor 202 rotates optical disc medium 200.
- the optical head 201 records data on the optical disk medium 200 and reproduces data from the optical disk medium 200.
- the servo controller 203 controls the optical head 201 and the spindle motor 202, and performs control to focus and scan the light beam irradiated from the optical head 201 onto the optical disk medium 200 onto a track provided on the optical disk medium 200. , Move control to access the target track.
- the I / F circuit 216 receives recording data to be recorded on the optical disc medium 200 from the host 217 and sends reproduction data reproduced from the optical disc medium 200 to the host 217.
- the error correction encoding circuit 209 adds parity for error correction to the recording data received from the I / F circuit 216.
- the data modulation circuit 208 modulates the recording data including the parity from the error correction encoding circuit 209 according to a predetermined modulation rule, and converts the recording data into a recording pattern to be recorded on the optical disc medium 200.
- the laser driving circuit 207 converts the recording pattern modulated by the data modulation circuit 208 into an optical pulse to drive the laser of the optical head 201 in order to accurately form a mark on the optical disc medium 200.
- the wobble detection circuit 210 extracts a wobble signal from the reproduction signal from the optical disc medium 200.
- the wobble PLL circuit 211 generates a wobble clock obtained by multiplying the wobble signal by a predetermined magnification.
- the ADIP reproduction circuit 213 reproduces ADIP information from the wobble signal and the wobble clock.
- the channel PLL circuit 212 operates so that the phase of the clock obtained by dividing the wobble clock by m and the phase of the clock obtained by dividing the recording clock by n are synchronized to generate a recording clock having a frequency of n / m.
- the timing interpolation circuit 214 specifies the position where the recording data is recorded from ADIP and the value of n / m.
- the reproduction PLL circuit 204 extracts a synchronous clock for demodulating a reproduction signal from the optical disk medium 200.
- the data demodulation circuit 205 demodulates the recorded data from the reproduction signal.
- the error correction decoding circuit 206 corrects the error of the demodulated data and restores it.
- the system controller 215 controls each block and also controls communication with the host 217.
- the system controller 215 controls each unit of the optical disc apparatus 20 so as to record data based on the recording clock generated by the channel PLL circuit 212 and the recording position specified by the timing interpolation circuit 214.
- the data modulation circuit 208, the laser drive circuit 207, and the optical head 201 record data based on the recording clock and the recording position.
- the data modulation circuit 208, the laser drive circuit 207, and the optical head 201 are collectively defined as a recording unit.
- FIG. 2 is a diagram showing zones of the optical disc medium 200 according to the present embodiment.
- the recording surface of the optical disc medium 200 is divided into Z zones (Z is a natural number of 2 or more) in the radial direction.
- Z is a natural number of 2 or more
- the wobbling of the track is configured radially, and the length is longer toward the outer periphery.
- the linear density is lowered toward the outer periphery, and the recording capacity is reduced. Therefore, by changing the ratio of the unit length of data to the length of wobbling according to the radius, it is possible to obtain a substantially constant linear density over the entire surface.
- the track is composed of a groove track formed by grooves and a land track formed between adjacent groove tracks. Data can be recorded on either the groove track or the land track.
- the I / F circuit 216 acquires the recording data transmitted from the host 217.
- the recording data is divided into blocks of a predetermined unit and sent to the error correction encoding circuit 209 for each block.
- the error correction encoding circuit 209 adds a parity code for correcting an error during reproduction to the recording data in units of blocks.
- the data modulation circuit 208 modulates the recording data to which the parity code is added into a recording pattern according to a modulation rule of 1-7PP code, for example.
- the laser driving circuit 207 converts the recording pattern modulated by the 1-7PP code into 2T to 9T recording marks and spaces into a castle type pulse waveform in order to accurately form the recording marks on the optical disc medium 200. Conversion is performed, and a drive signal for driving the laser is output to the optical head 201.
- the optical head 201 records a recording pattern by irradiating the optical disk medium 200 with a laser pulse.
- the optical disk medium 200 has a structure with radial ADIP. Therefore, the recording clock for recording data is controlled so that the linear density of the recording data in the recording surface of the optical disc medium 200 is substantially constant.
- the channel PLL circuit 212 controls the recording clock.
- the wobble detection circuit 210 detects a wobble signal corresponding to the wobbling of the track.
- the wobble PLL circuit 211 generates a wobble clock synchronized with the wobble signal based on the wobble signal.
- the channel PLL circuit 212 operates so that the phase of the clock obtained by dividing the wobble clock by m and the phase of the clock obtained by dividing the recording clock by n are synchronized, and the recording clock having a frequency n / m times the wobble clock is generated. Generate.
- the system controller 215 controls such a recording operation. First, the system controller 215 determines a track for recording the recording data acquired by the I / F circuit 216. Although the recording data is divided into blocks, a plurality of blocks relating to one recording data are continuously recorded on one of the groove track or the land track of the same layer.
- FIG. 3 is a diagram showing a state in which a plurality of blocks are recorded in the optical disc medium 200 of the present embodiment.
- the data a is divided into three, and is continuously recorded on the groove track as DTa1, DTa2, and DTa3.
- the data b is divided into four, and is continuously recorded on the land track as DTb1, DTb2, DTb3, and DTb4.
- the position movement is small when the recorded data is reproduced, and the data can be read in a short time.
- data a when DTa1 and DTa2 are not continuous in a groove track, DTa1 is a groove track, DTa2 is a land track, or even if the same groove track is recorded on a groove track with a distant radial position,
- reproducing data a after reproducing DTa1, it is necessary to move to a land track or move to a groove track with a distant radial position in order to reproduce DTa2, so that all of data a is obtained until DTa2 is obtained. Will not be available and will take longer to play.
- the system controller 215 determines a zone for recording recording data.
- FIG. 4 is a diagram for explaining a data and address arrangement structure for the optical disc medium 200 of the present embodiment.
- FIG. 4 shows an arrangement structure in the vicinity of the boundary between zones A-1 and A, which are adjacent zones.
- Zone A-1 has ADIP ranges N-4, N-3, N-2, and N-1 arranged by wobbling, and Zone A has ADIP ranges N, N + 1, N + 2, and N + 3. .
- zone A-1 a recording pattern is recorded continuously with data addresses M-2 and M-1 surrounded by a solid line.
- the boundary between ADIP N and the data address M of the recording pattern coincides, and the recording pattern is continuously recorded at data address M + 1.
- the recording start position of each zone should be matched with the ADIP boundary position. Different values of n / m are determined for zones A-1 and A, and the length of the zone is not an integral multiple of the length of the data block. Therefore, as shown in FIG. 4, an area where no data is recorded remains from the end of the last data block M-1 of the zone A-1 to the start of the zone A.
- the optical head 201 moves the laser irradiation position to a position in front of the recording target position.
- the ADIP is reproduced by the wobble detection circuit 210, the wobble PLL circuit 211, and the ADIP reproduction circuit 213 to identify the physical current position.
- a distance Ld obtained by converting the calculated distance Lw into a reference for the block length of the recording data is calculated.
- the data block unit reference position of the data blocks M-2 and M-1 recorded in the zone A-1 with the start point Pm of the zone A as a base point can be calculated.
- Data blocks M-2 and M-1 surrounded by a broken line indicate virtual positions when the starting point position Pm of zone A is used as a base point. Even if the target position to be accessed is the zone A and the current position is the zone A-1 and crosses the zone boundary, the virtual current position Pd is used. There is no break.
- the current position Pd based on the data block unit with the start point of the zone A as the reference position can be obtained.
- the channel PLL circuit 212 uses the value of n / m determined in zone A to operate so that the phase of the clock obtained by dividing the wobble clock by m is synchronized with the phase of the clock obtained by dividing the recording clock by n.
- a recording clock having a frequency n / m times the wobble clock is generated.
- the timing interpolation circuit 214 operates the data timing interpolation counter with the generated recording clock based on the specified data block unit reference current position Pd, and interpolates the boundary of the subsequent data block with 1 channel bit accuracy. it can.
- the data timing interpolation counter indicates the target position for recording data
- the data modulation circuit 208 and the laser drive circuit 207 operate to start recording data.
- FIG. 5 is a diagram showing the configuration of the data address of the present embodiment.
- the data address is composed of a recording layer number, a block number, and groove track / land track information.
- the recording layer number is information indicating the number of the recording layer in which data is recorded
- the block number is information indicating the block number of the data
- the groove track / land track information is the place where the data is recorded Is information indicating whether it is a land track or a groove track.
- the data block number is M + 2.
- the recording data to which the data address is added is modulated by the data modulation circuit 208 and recorded on the track of the optical disc medium 200 by the laser driving circuit 207 and the optical head 201.
- the current position Pd based on the data block unit can be determined at the first time after the scanning of the track is started, but is used to determine whether or not a deviation occurs in the data timing interpolation counter thereafter. be able to.
- the current position on the basis of the data block unit is obtained, and the obtained position information is compared with the value of the data timing interpolation counter, thereby confirming whether the synchronization position for recording data for ADIP is shifted. .
- the recording operation of the optical disc device 20 in the embodiment of the present disclosure has been described, but the same applies to the reproducing operation.
- the reproduction PLL circuit 204 when the position of the data block to be reproduced is reached, the reproduction PLL circuit 204, the data demodulation circuit 205, and the error correction decoding circuit 206 operate to reproduce the data. .
- the management information of the optical disk medium 200 As the management information of the optical disk medium 200, the above-described list table of the start ADIP reference position Pwo of each zone, the start data block reference position Pm of each zone, and the ratio n / m of the wobble clock to the recording clock of each zone is configured. Is done.
- This management information is recorded on the optical disc medium 200 in one predetermined zone.
- the system controller 215 first controls each block so as to read this management information, and performs the recording operation as described above according to the read management information.
- linear density information indicating the linear density for recording data may be recorded in a predetermined zone.
- the system controller 215 first controls each block so as to read the line density information, generates the management information list table according to the read line density information, and according to the generated management information as described above. Recording operation.
- the management information or linear density information may be recorded as data, or may be recorded by track wobbling as in ADIP. When recorded as data, it is reproduced as data by the reproduction PLL circuit 204, the data demodulation circuit 205, and the error correction decoding circuit 206. When recorded by wobbling, it is reproduced by the wobble detection circuit 210, the wobble PLL 211, and the ADIP reproduction circuit 213.
- the position can be identified stably only from ADIP regardless of the linear density of data.
- the effect that it does not become can be acquired.
- the optical disc apparatus of the embodiment of the present disclosure not the data address included in the recorded data, but the data address that is virtually continuous is extracted from the start position of the target zone to be accessed and ADIP. Therefore, the tracking of the data address is not interrupted at the zone boundary, and the access time is not prolonged.
- the present disclosure is useful for an optical disc medium on which data is optically recorded, an optical disc apparatus that records and reproduces data on an optical disc medium, and an optical disc recording method.
- Optical disk device 200 700 Optical disk medium 201, 701 Optical head 202, 702 Spindle motor 203, 703 Servo controller 204, 704 Reproduction PLL circuit 205, 705 Data demodulation circuit 206, 706 Error correction decoding circuit 207, 707 Laser drive circuit 208, 708 Data modulation circuit 209, 709 Error correction coding circuit 210, 710 Wobble detection circuit 211, 711 Wobble PLL circuit 212, 712 Channel PLL circuit 213, 713 ADIP reproduction circuit 214 Timing interpolation circuit 215, 714 System controller 216, 715 I / F circuit 217, 716 Host
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- Signal Processing (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
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- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
図1は、本実施の形態における光ディスク装置20の構成を示す図である。図1に示す光ディスク装置20は、光ヘッド201、スピンドルモータ202、サーボコントローラ203、再生PLL回路204、データ復調回路205、誤り訂正復号回路206、レーザ駆動回路207、データ変調回路208、誤り訂正符号化回路209、ウォブル検出回路210、ウォブルPLL回路211、チャネルPLL回路212、ADIP再生回路213、タイミング補間回路214、システムコントローラ215、I/F回路216、ホスト217を備える。
200,700 光ディスク媒体
201,701 光ヘッド
202,702 スピンドルモータ
203,703 サーボコントローラ
204,704 再生PLL回路
205,705 データ復調回路
206,706 誤り訂正復号回路
207,707 レーザ駆動回路
208,708 データ変調回路
209,709 誤り訂正符号化回路
210,710 ウォブル検出回路
211,711 ウォブルPLL回路
212,712 チャネルPLL回路
213,713 ADIP再生回路
214 タイミング補間回路
215,714 システムコントローラ
216,715 I/F回路
217,716 ホスト
Claims (11)
- データを所定のブロック単位に分割して光ディスク媒体に記録する光ディスク記録方法であって、
前記光ディスク媒体は、
データが記録されるトラックは、ウォブリングにより形成され、半径方向に複数のゾーンに分割されており、前記ゾーン毎にウォブルクロックに対する記録クロックのクロック比n/m(n、m:1以上の自然数)が予め設定されており、
前記光ディスク媒体からウォブリングに応じたウォブル信号を検出するステップと、
前記ウォブル信号を所定の倍率に逓倍したウォブルクロックを生成するステップと、
前記ウォブル信号と前記ウォブルクロックからトラックの位置を示すADIPを再生して現在位置を特定するステップと、
前記ウォブルクロックに対し、前記クロック比n/mの記録クロックを生成するステップと、
前記現在位置と記録対象ゾーンのADIPの始端位置と前記記録対象ゾーンのデータアドレスの始端位置と前記クロック比n/mとからデータアドレス現在位置を特定し、前記データアドレス現在位置に基づいて記録開始位置を特定するステップと、
前記記録対象ゾーンの前記記録開始位置からデータを記録するステップと、を含む、光ディスク記録方法。 - 前記光ディスク媒体は、前記ゾーン毎の、ADIPの始端位置とデータアドレスの始端位置とクロック比n/mとを管理情報として記録されており、
前記管理情報は所定のゾーンに記録されている、請求項1記載の光ディスク記録方法。 - 前記光ディスク媒体は、前記データを記録する線密度を示す線密度情報が記録されており、前記ゾーン毎の、ADIPの始端位置とデータアドレスの始端位置とクロック比n/mを算出するステップをさらに含む、
請求項1記載の光ディスク記録方法。 - 前記光ディスク媒体は、複数の記録層を含み、前記記録層は、グルーブにより形成されたグルーブトラックと、隣接するグルーブトラックの間に形成されたランドトラックとを備え、
前記記録するステップは、連続するデータを同じ層の前記グルーブトラックあるいは同じ層の前記ランドトラックのいずれかに連続して記録する、
請求項1記載の光ディスク記録方法。 - 前記データアドレスは、データが記録される前記記録層と前記グルーブトラックまたは前記ランドトラックを識別可能な情報と、記録するデータのブロック番号を識別可能な情報とを含む、
請求項4記載の光ディスク記録方法。 - データを所定のブロック単位に分割して光ディスク媒体に記録する光ディスク装置であって、
前記光ディスク媒体は、
データが記録されるトラックは、ウォブリングにより形成され、半径方向に複数のゾーンに分割されており、前記ゾーン毎にウォブルクロックに対する記録クロックのクロック比n/m(n、m:1以上の自然数)が予め設定されており、
前記光ディスク媒体からウォブリングに応じたウォブル信号を検出するウォブル検出回路と、
前記ウォブル信号を所定の倍率に逓倍したウォブルクロックを生成するウォブルPLL回路と、
前記ウォブル信号と前記ウォブルクロックからトラックの位置を示すADIPを再生して現在位置を特定するADIP再生回路と、
前記ウォブルクロックに対し、前記クロック比n/mの記録クロックを生成するチャンネルPLL回路と、
前記現在位置と記録対象ゾーンのADIPの始端位置と前記記録対象ゾーンのデータアドレスの始端位置と前記クロック比n/mとからデータアドレス現在位置を特定し、前記データアドレス現在位置に基づいて記録開始位置を特定するタイミング補間回路と、
前記記録対象ゾーンの前記記録開始位置からデータを記録する記録部と、を備える、光ディスク装置。 - データが所定のブロック単位で記録されるトラックは、ウォブリングにより形成され、半径方向に複数のゾーンに分割されており、
前記ゾーン毎の、トラックの位置を示すADIPの始端位置とデータアドレスの始端位置とウォブルクロックに対する記録クロックのクロック比n/m(n、m:1以上の自然数)とを管理情報として記憶される、
光ディスク媒体。 - 複数の記録層を有し、
前記記録層は、グルーブにより形成されたグルーブトラックと、隣接するグルーブトラックの間に形成されたランドトラックとを有する、
請求項7記載の光ディスク媒体。 - 前記データアドレスは、
データが記録される前記記録層を識別可能な情報と、
データが記録されるトラックが、前記ランドトラックか前記グルーブトラックかを識別可能な情報と、
前記ブロックの位置を示す情報と、を含む、
請求項7記載の光ディスク媒体。 - 前記データが記録される線密度を示す線密度情報が記録された、
請求項7記載の光ディスク媒体。 - 前記管理情報は、所定のゾーンに記録される、
請求項7記載の光ディスク媒体。
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