WO2000045382A1 - Support de stockage de type disque et procede de poursuite utilisant celui-ci - Google Patents
Support de stockage de type disque et procede de poursuite utilisant celui-ci Download PDFInfo
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- WO2000045382A1 WO2000045382A1 PCT/JP2000/000434 JP0000434W WO0045382A1 WO 2000045382 A1 WO2000045382 A1 WO 2000045382A1 JP 0000434 W JP0000434 W JP 0000434W WO 0045382 A1 WO0045382 A1 WO 0045382A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
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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
- G11B7/00745—Sectoring or header formats within a track
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
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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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
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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
- G11B2020/1238—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 track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
- G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
- G11B2020/1267—Address data
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- 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
- G11B2020/1287—Synchronisation pattern, e.g. VCO fields
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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
- G11B2020/1292—Enhancement of the total storage capacity
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/216—Rewritable discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2525—Magneto-optical [MO] discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2525—Magneto-optical [MO] discs
- G11B2220/2529—Mini-discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—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
- G11B2220/2575—DVD-RAMs
Definitions
- the present invention relates to a disk-shaped storage medium and a tracking method using the same.
- the present invention relates to a disk-shaped storage medium for reproducing and recording data using laser light, and a tracking method using the disk-shaped storage medium.
- optical discs have been put to practical use as large-capacity data files, music and video storage media as disc-shaped storage media, but the capacity is being increased for more applications.
- a method is generally used in which recording data is divided into sectors having a fixed unit data size, and this sector is used as a basic rewriting unit for recording and playback. ing.
- An address for identifying the sector, which is a basic unit of rewriting, is added to each sector. The address is usually recorded on the optical disc as a pit due to the unevenness.
- a land Z groove recording method using grooves between track guides in order to increase the density in the track direction has become popular.
- 1001 is a substrate
- 1002 is a recording film
- 1003 is a first track
- 1004 is a second track
- 1005 is a track
- 1006 is the address for identifying the sector
- 1006 Reference numeral 7 denotes a data recording area in which recording is performed overnight.
- the first track 1003 is constituted by a groove
- the second track 1004 is constituted by grooves interposed between the grooves of the first track. Further, as shown in FIG. 12A, the first track 1003 and the second track 1004 have a structure that is alternately repeated for each turn.
- the tracking of the light beam is performed using this groove as a guide, but since the first track 1003 is on the groove and the second track 1004 is between the grooves, the track between the first track and the second track is used.
- the transition requires the reversal of the tracking polarity.
- a polarity inversion mark 1008 is provided at a switching portion between the first track and the second track.
- the optical disc device uses the polarity reversal mark 1008 to perform tracking polarity reversal.
- the address 1006 and the data recording area 10007 are arranged as shown in FIG. 12 (b).
- the address 1006 added for identifying the sector 10005 is a sector mark 10009 indicating the sector start point and the address VF0 mark used to generate a clock for reproducing the section 1 0 1 0, address mark 1 0 1 1 indicating the start of address data, sector number 1 0 1 2, track number 1 It consists of 0 1 3 and error detection code 1 0 1 4. Since the sector mark 1 0 9 and the address mark 1 0 1 1 are data patterns for identifying the start of address data, the sector number 1 0 1 2, the track number 1 0 1 3, and the error detection It must be a special pattern that does not appear in the command line.
- the address data of the sector number 101, the track number 101, and the error detection code 10014 are processed after bi-phase modulation or run-length limit modulation (RLL modulation). Has been recorded.
- RLL modulation run-length limit modulation
- data that does not appear from other data modulation rules Therefore, a unique data pattern that does not follow this modulation rule is used for the section mark 1109 and the address mark 1101.
- a mark having a length sufficient to easily identify the start of the address area even when the synchronization PLL clock is not locked is used as the sector mark of 1909.
- the modulation of the address data part bi-phase modulation for modulating 0 to 0 or 11 and modulating 1 to 10 or 0 1 is used.
- a pattern in which three or more 1s or 0s are continuous becomes a unique pattern that does not follow the modulation rule. Therefore, in the conventional example shown in FIG. 12, the address mark 1 0 1 1 is 1 0 00 1 1 1 0 and the sector mark 1 00 9 is 1 1 1 1 1 1 1 1 1 1 0 0 00 as a pattern that does not follow the modulation rule. 0 0 0 is assumed.
- the conventional method of reproducing the address portion will be briefly described below.
- a sector mark is detected.
- the sector mark has a unique pattern consisting of eight consecutive 1's and 0's. If a mark longer than a certain length is detected using the PLL's free-running clock, the sector mark 1'09 can be easily detected. I can get out.
- the PLL clock for address demodulation is locked by the following VFO 1 10. After the PLL clock is locked, a decision is made between 1 and 0 of the reproduced data using the PLL clock, and the decision data is obtained. If the pattern of address mark 1 0 1 1 1 0 0 0 1 1 1 0 is detected from this judgment data, the following data is sector number 1 0 1 2, track number 1 0 1 3, error
- the detection code is 1014.
- the detection of the address mark 101 1 turns out that the following data is the sector number 101 2 to be demodulated, the track number 101 3 and the error detection code 101 4 to be demodulated.
- the demodulation is performed overnight.
- a VFO mark 11010 for clock synchronization is provided in the address portion 106, but a method for obtaining a clock for demodulation of the addressless data by another means is also performed. A conventional example of this type will be described with reference to FIGS.
- Fig. 13 (a) 1101 is the substrate, 1102 is the recording film, 1103 is the track, 1104 is the sector that divides the track, and 1105 is the sector that is further divided
- the segment 1106 is an address for identifying a sector, and 1107 is a data recording area for recording data.
- a wobbled bit 1108 for obtaining a signal for tracking is followed by a port for demodulating addresses and data.
- a clock pit 1109 for generating a clock is provided.
- the address 111 added to identify the section 1104 is an address mark 111 indicating the start of the addressless session. 0, sector number 1 1 1 1, track number 1 1 1 2 and error detection code 1 1 1 3
- the address mark 111 is a special pattern that does not appear in the sector number 111, the track number 111, and the error detection code 111.
- bi-phase modulation is used as the modulation of the address portion and 10000 0 1 110 is used as the address mark 111 in the same manner as in the above conventional example.
- a PLL clock for address demodulation is generated by multiplying the frequency of the clock pit detection signal by N by the PLL using the clock pit.
- the determination of 1 or 0 of the reproduced data is performed as in the above-described conventional example, and the determination data is obtained. From this judgment data, the address mark 1 1 1
- the following data becomes sector number 1 1 1 1, track number 1 1 1 2, and error detection code 1 1 1 3 .
- the detection of the address mark 1 11 0 reveals that the following data is the sector number 1 1 1 1 to be demodulated, the track number 1 1 1 2 and the error detection code 1 1 1 3 An overnight demodulation takes place.
- the conventional magneto-optical disk is provided with a detection pole for reversing the tracking polarity in order to continuously reproduce the first track and the second track, which is also a factor for reducing the recording / reproducing data area. Had become. Also, with the 1-bit polarity reversal detection pit, it was difficult to ensure sufficient reliability against disk defects and disk surface scratches. Disclosure of the invention
- the present invention has been made in order to solve the above-described problems, and has an object to provide an optical disk capable of reducing the redundancy of an address portion and capable of recording information at a high density, and tracking using such an optical disk. It aims to provide a method.
- a track is divided into a plurality of areas, and address data is allocated to the plurality of areas.
- the first disk-shaped storage medium it is preferable that data common between the adjacent tracks is arranged at a track pitch that can be reproduced either on the tracks or between the tracks. This makes it possible to read information useful for control from the optical disk without tracking control.
- a second disk-shaped storage medium has two tracks having different tracking polarities of tracks alternately arranged for each round, and the track is divided into a plurality of areas.
- an error detection code is added, and the data common to the adjacent tracks is arranged at a track pitch that can be reproduced on either of the tracks or between the tracks.
- the address data is distributed in the plurality of areas one bit at a time.
- address data when address data is reproduced, common data and the common data are identified in order to identify common data between adjacent tracks. There is no need to increase the speed of the shift register for storing another error detection code, and the data synchronization processing can be facilitated.
- the second disk-shaped storage medium two tracks having different tracking polarities alternately arranged for each turn are shifted left and right across the track center in a plurality of divided areas of the track. It is preferable that the track is arranged at a position separated by a certain distance in the track running direction, and the track is controlled by a pair of wobbled marks whose positions are alternately changed.
- the tracking control by performing the tracking control by changing the arrangement of the double marks, that is, changing the polarity of the tracking error signal for each rotation, it is possible to maintain a single spiral track structure that is advantageous for continuous recording or reproduction of large-capacity data. Therefore, it is possible to increase the track pitch.
- a tracking method has two tracks having different tracking polarities of a track, the track is divided into a plurality of areas, and address data is partially stored in the plurality of areas.
- An error code for identifying the common data is added to the common data between adjacent tracks including the circumferential position information of the address data, and the common data is added.
- a disk-shaped storage medium arranged at a track pitch that can be reproduced on both the tracks and between the tracks, a starting point of the address data based on the common data and the error detection code.
- determine the tracking polarity from the position information determine the tracking polarity from the position information, and perform tracking control. It is characterized by performing. With this method, it is possible to easily detect the switching of the tracking polarity.
- the pit for generating the timing for demodulating the address is on a track or between tracks.
- the tracks are arranged at a track pitch that can be reproduced.
- a track formed only between grooves or between grooves is divided into a plurality of areas, and address data is arranged in the plurality of areas.
- a reference position for generating a timing for performing demodulation of the addressless data is generated from a start end or an end of the track groove by using a disk-shaped storage medium.
- a track formed by a groove or a groove is divided into a plurality of areas, and address data is represented by 1 bit as a start or end position of the groove divided into the plurality of areas. It is preferable to dispose them in the plurality of regions at a time.
- the groove or the track formed between the grooves is divided into a plurality of areas, and the address data is defined as 1 bit as the position of the start end of the groove divided into the plurality of areas. It is preferable that the grooves are divided into the plurality of regions and the ends of the grooves divided into the plurality of regions are aligned at the same radial position.
- the tracking polarity switching position can be detected before the tracking pull-in operation, a stable tracking pull-in operation can be performed on an optical disc having a high track pitch. Furthermore, by performing tracking control using signals from the wobbled bits while recording / reproducing only in the grooves, narrower track pitches and inter-track spacing are achieved. And the elimination of the difference in the recording / reproducing characteristics can be realized at the same time.
- FIGS. 1 (a), 1 (b), and 1 (c) are an overall structure diagram, a segment structure diagram, and a diagram showing an address area, respectively, of an optical disc according to the first embodiment of the present invention. is there.
- FIG. 2 is a block diagram of an address demodulator when the optical disc according to the first embodiment of the present invention is used.
- FIG. 3 is a diagram illustrating an address demodulation operation when the optical disc according to the first embodiment of the present invention is used.
- FIG. 4 is a diagram for explaining a synchronization process at the time of address demodulation when the optical disc according to the first embodiment of the present invention is used.
- FIGS. 5 (a), 5 (b), and 5 (c) are an overall structure diagram, a segment structure diagram, and a diagram showing an address area, respectively, of an optical disc according to the second embodiment of the present invention. is there.
- FIG. 6 is a diagram showing a tracking structure of the optical disc according to the second embodiment of the present invention.
- FIG. 5 is a block diagram of a tracking polarity detector when the optical disc according to the second embodiment of the present invention is used.
- FIGS. 8 (a) and 8 (b) are an overall structure diagram and a segment structure diagram of an optical disc according to the third embodiment of the present invention, respectively.
- FIGS. 9 (a), 9 (b) and 9 (c) are views for explaining the data arrangement of the address portion of the optical disc according to the third embodiment of the present invention.
- FIGS. 0 (b) is an overall structure diagram and a segment structure diagram of the optical disc according to the fourth embodiment of the present invention, respectively.
- FIGS. 11 (a) and 11 (b) show a fifth embodiment of the present invention, respectively.
- 1A and 1B are an overall structure diagram and a segment structure diagram of an optical disc according to an embodiment.
- FIGS. 12 (a), 12 (b), and 12 (c) are diagrams respectively showing an overall structure diagram, a segment structure diagram, and an address area of a conventional optical disc.
- FIGS. 13 (a), 13 (b), and 13 (c) are diagrams showing the overall structure, segment structure, and address area of another conventional optical disk, respectively.
- 1 (a), 1 (b) and 1 (c) show the overall structure, segment structure and address area of an optical disc according to the first embodiment of the present invention, respectively.
- 101 is a substrate
- 102 is a recording film
- 103 is a track
- 104 is a sector obtained by dividing a track
- 105 is a segment obtained by further dividing a sector
- 100 is a figure.
- Reference numeral 6 denotes an address for identifying a sector
- reference numeral 107 denotes a data recording area for recording data overnight.
- the track 103 one round of the disk is divided into 32 sectors 104. Further, the sector 104 is divided into 40 segments 105, and an address 106 is recorded in the first segment.
- a clock pit 108 for generating a clock
- a cobb pit 109, 11 for obtaining a signal for tracking.
- the tracking method according to the present embodiment employs a sample system that performs tracking so that the amount of reflected light from the wobbled pits 109 and 110 becomes equal. It is a method.
- an address 106 added to identify the sector 104 has an 8-bit sector number 111, an error detection code 111 for identifying the sector number, It consists of 16-bit track number 113 and address data error detection code 114.
- An address format in which an error detection code 112 for identifying the common data is added to data common between adjacent tracks (sector number 111 in the present embodiment) This is one of the major features of the present invention.
- the address data can be synchronized.
- an 8-bit CRC error detection code is used as the sector number error detection code 112
- a 14-bit CRC error detection code 114 is used as the address number error detection code 114.
- An error detection code was used.
- conventional address modulation such as bi-face is not performed on the address data 1 1 1, 1 1 2, 1 1 3, 1 1 4, and recording is performed as a 1/0 bit string. ing.
- This kind of addressless data is recorded after being subjected to bi-phase modulation.
- When demodulating a dress it is necessary to synchronize demodulated data instead of the conventional address mark. This method will be described below.
- FIG. 2 is a block diagram of an address demodulator that performs demodulation of the address 106 using the optical disc according to the present embodiment.
- FIG. 3 is a timing chart of the address demodulator. With reference to FIGS. 2 and 3, a method of reproducing the address 106 on the optical disc according to the present embodiment will be described.
- reference numeral 201 denotes a clock pit detector
- reference numeral 202 denotes a PLL for generating a clock for address demodulation from the clock pit
- reference numeral 203 denotes a falling edge of the PLL clock, which is used for address data recovery.
- the 204 is a 16-bit shift register that can store the 8-bit sector number 11 1 and 8-bit sector number error detection codes 112, and the 205 is a 204 shift register.
- CRC error detector to detect the error of the evening content
- 206 is the track number 1 13 and the error detection code of the address data 1 14 Generates the demodulation timing of the error detection code 1 14 A shift register in which the number is stored
- 208 is a CRC error detector that detects an error in the address data.
- the reference clock is generated from clock pit 108.
- the clock bit 108 at the beginning of the segment 105 and the clock bit 108 at the beginning of the next segment are represented by two bits as shown at 301 in FIG. 0 Address data bit. If a clock with a frequency of 200 times is generated by the PLL 202 based on the clock pit signal 302 detected by the clock pit detector 201, the clock synchronized with the address data bit can be obtained. 30 is obtained.
- the decision unit 203 decides 1 ⁇ 0, and the demodulated data of 304 is obtained. This demodulated data 304 is read into shift register 204. The contents of the shift register 204 are judged to be error by the error detector 205.
- FIG. 4 shows the operation of the shift register 204 and the error detector 205.
- a sector number CRC error occurs only when all of the sector number 1 1 1 and the sector number error detection code 1 1 2 have been loaded into the shift register 204.
- Output of the error detector 205 becomes 0.
- the timing generator 206 From the output 305 of the error detector 205, the timing generator 206 generates a timing signal 3 for operating the track number shift register 207 and the address data error detector 208. 0 6 and 3 0 7 (see Figure 3) can be generated. Based on the timing signals 306 and 307, if the shift register 207 for storing track numbers and the error detector 209 are operated, demodulation of the address can be performed.
- the address section can be demodulated without applying any modulation to the address data, and the redundancy of the address section is greatly reduced. can do.
- FIGS. 5 (a), 5 (b), and 5 (c) show the entire structure, segment structure, and address area of an optical disc according to the second embodiment of the present invention, respectively.
- 501 is a substrate
- 502 is a recording film
- 503 is a first track
- 504 is a second track
- 505 is a sector obtained by dividing the track
- Reference numeral 506 denotes a segment obtained by further dividing the sector
- 507 denotes an address for identifying the sector
- 508 denotes a data recording area for performing data recording.
- the first track 503 and the second track 504 divide one turn of the disk into 32 sectors 505. Further, the sector 505 is divided into 40 segments 506, and an address 507 is recorded in the first segment. The remaining 2nd to 40th segments become the data recording area 508 overnight.
- a clock pit 509 for generating a clock and a pair of wobbled bits 5 for obtaining a signal for tracking. 10 and 5 1 1 are provided.
- the tracking method in the present embodiment is also a sample-spot method as in the first embodiment.
- the first track 503 and the second track 504 having different tracking polarities of the sample servo system are alternately repeated for every turn. ing.
- FIG. 6 shows the positional relationship between the paired tracks 510 and 511 with respect to the first track 503 and the second track 504.
- the first track 503 and the second track 504 are alternately repeated for each rotation of the disk, and the tracks are spirally continuous (hereinafter, a single spiral).
- Polarity switching type sample support system the arrangement of the wobbled bits 510 and 511 is different, and the tracking polarity is inverted. In this way, double track pitch is realized by using two positive and negative polar positions of the tracking signal.
- a detection pit (polarity reversal mark) 1008 for reversing the polarity is provided at the switching section of tracks having different polarities, and the tracking polarity is determined based on this pit.
- the tracking polarity is determined based on this pit.
- switching of the tracking polarity between the first track 503 and the second track 504 is realized without the polarity switching detection pit.
- the address 507 in the present embodiment includes an 8-bit sector number 512, a sector number error detection code 513, and a first track 503. Track number 514, address data error detection code 515 for track 1 503, track number 516 for track 2 504, and address data error code for track 504 Detection code 5 17 As in the first embodiment, an error detection code 513 is added to data common between adjacent tracks (sector number 511 in this embodiment), and the address 507 is also picked up.
- a major feature of the present invention is that the port arrangement is as shown in FIG.
- the data 512, 513 common between tracks adjacent in the radial direction of the disk are located at the same position in the first track 503 and the second track 504. It is recorded and has a structure arranged at a different position from 514, 515 and 516, 517, which are different data between adjacent tracks.
- the sector number 5 1 2 and its error detection code 5 1 3 are arranged very densely in the radial direction of the disk and are data common between adjacent tracks, so there is no tracking control. Can be played.
- the distance between tracks adjacent to the disk in the radial direction is, for example, between the center of the address pit and the center of the adjacent address pit, near the half-value width of the spot due to the light beam, or more. It is set to be below.
- the first track 50 The tracking polarity inversion process at the boundary between the third track and the second track 504 can be performed. This method will be described with reference to FIG.
- FIG. 7 is a block diagram of the tracking polarity detector according to the present embodiment.
- reference numeral 701 denotes a clock pit detector
- reference numeral 702 denotes a PLL for generating a clock for address demodulation from the clock pit 509
- reference numeral 703 denotes an address data 1 at the falling edge of the PLL clock.
- Judgment unit for judging 0, 704 is an 8-bit sector number 511 and 16-bit shift register that can store 8-bit sector number error detection code 513
- 705 Is a CRC error detector for performing error detection on the contents of the shift register 704.
- the configuration up to here is the same as that of the first embodiment.
- a polarity switching sector determiner 706 for detecting a polarity switching sector from the read sector number and a tracking polarity inverter are further provided. It consists of 707.
- the sector number 5 12 and the accompanying sector number error detection code 5 13 can be reproduced in the tracking off state.
- the error detector 705 can determine that the sector number has been correctly read.
- the polarity switching sector determiner 706 determines that the sector number read correctly is the sector whose tracking polarity switches, and the tracking polarity switcher 707 switches (reverses) the tracking polarity.
- the position where the tracking polarity changes can be detected before the tracking operation.
- the tracking polarity switching position is detected only after the tracking operation is performed. There was a problem that the tracking pull-in near the device became unstable.
- the optical disk according to the present embodiment as described above, since the tracking polarity switching position can be detected before the tracking pull-in operation, a stable tracking pull-in operation can always be performed.
- the demodulation of the address 507 in the present embodiment can be performed by the same method as in the first embodiment.
- the polarity switching sector determiner 706 determines that the sector number determined to be correctly read by the error detector 705 is the sector whose tracking polarity is to be switched, and the tracking is performed.
- the configuration has been described in which the polarity inverter 707 switches (inverts) the tracking polarity.
- FIGS. 8 (a) and 8 (b) show the entire structure and the segment structure of an optical disc according to the third embodiment of the present invention, respectively.
- reference numeral 800 denotes a substrate
- reference numeral 800 denotes a recording film
- reference numeral 803 denotes a first track
- reference numeral 804 denotes a second track
- reference numeral 805 denotes a track divided into 128. Segment.
- a clock pit 806 for generating a clock and a pair of wobbled bits 807 for obtaining a signal for tracking are provided.
- the racking method is a single spiral polarity switching type sample support method as in the second embodiment.
- the present embodiment has a great feature in that the addressless data is decomposed into 1-bit units and arranged in the segment 805.
- the CRC error detectors 205 and 705 perform 16 shift operations while the 204 and 704 shift registers shift 1 bit. There is a need. Therefore, a high-speed clock was required, and it was difficult to increase the address transfer rate.
- the present embodiment by dispersing the address pits 809 and arranging them in the segment 805, one bit of the address pit 809 is reproduced and then the next address pit 809 is reproduced. There is some extra time before playback. Since the error detector can operate during this time, the system can operate at high speed.
- 811 is a segment number
- 812 is an error detection code for detecting an error of the segment number 811
- 813 is a track number of the first track 803
- 814 Is the error detection code of the track number 813
- 815 is the track number of the second track 804
- 816 is the error detection code of the track number 815.
- the structure is such that a set of address information is generated by collecting address pits 809 of 80 segments. Since one track is a 1280 segment, 16 pieces of address information can be generated per track.
- the error detection code is added to the sector number as common information between adjacent tracks. However, in the present embodiment, the one corresponding to the sector number is the segment number 8 1 Has become 1.
- the segment number 811 and its error detection code 812 which are common information between the adjacent tracks, are recorded on both the first track 803 and the second track 804, as shown in FIG. It is possible to read without tracking control. Therefore, similarly to the second embodiment, the segment number can be detected with tracking off, and the tracking polarity inversion processing can be similarly realized.
- the track number 813 of the first track 803 and its error detection code 814 and the track number 815 of the second track 804 and its error detection code 816 are shown in FIG.
- the address pits 808 did not exist in adjacent tracks. This is to reduce an address read error due to crosstalk from an adjacent track.
- the address pits 809 in the segment 805 are collected, the format becomes the same as that of the first embodiment, and the synchronization and demodulation of the address are performed in the same manner as in the first embodiment. Yes, and can achieve the same effect.
- FIGS. 10 (a) and 10 (b) show the entire structure and the segment structure of an optical disc according to the fourth embodiment of the present invention, respectively.
- the fourth embodiment is different from the clock pit 806 in the third embodiment in the tracking method.
- 1001 is a substrate
- 1002 is a recording film
- 1003 is a first track
- 1004 is a second track
- 1005 is a track divided into 1280. Segment.
- the first track 1003 is formed between the grooves divided by the segment 1005, and the second track 1004 is formed by the grooves divided by the segment 1005.
- these two tracks are land group singles, which are alternately arranged every other lap. It has a spiral configuration.
- FIG. 10 (b) An enlarged view of segment 1005 is shown in FIG. 10 (b).
- the area where the recording is performed overnight is composed of the groove 106 and the groove 106, and the groove 106 is divided for each segment 105, and the divided groove is formed.
- An address pit 107 is arranged between the groove and the groove.
- the start position 1008 or the end position 1009 of the groove 1006, which is a data recording area, is arranged radially, and this is clock position information. This is equivalent to the function of the clock pit in the third embodiment.
- the terminal end 109 is used as the clock position information, but the start end 109 may be used as the clock position information.
- the tracking method of the present embodiment is a single spiral polarity switching type groove tracking method using the intensity of diffracted light or reflected light from the groove 106. Also in this method, the demodulation of the address pit 107 can be demodulated by the PLL clock extracted from the clock position information 1009. Therefore, the same effect as in the second and third embodiments can be obtained in the switching of the tracking polarity and the demodulation method of the address. Further, the format of the address gathering the address bit information 107 is the same as that of the third embodiment, and the same effect as that of the third embodiment can be obtained.
- 11 (a) and 11 (b) show the entire structure and the segment structure of an optical disc according to the fifth embodiment of the present invention, respectively.
- the form of the clock pit 806 and the address pit 809 in the third embodiment are different.
- 1101 is a substrate
- 1102 is a recording film
- 1103 is a first track
- 1104 is a second track
- 1105 is a track of 1280.
- a groove 1106, which is an area for recording data, and a pair of double bits 1107, 1108 for obtaining signals for tracking are arranged.
- the starting position 1109 of the groove 1106, which is the data recording area changes according to the address data 1 and 0.
- the address data is distributed one bit at a time and placed in segment 1105.
- the starting end position 1109 of the groove portion 1106 is equivalent to the address pit in the third embodiment.
- the terminal positions 110 of the grooves 1106 are aligned, and this becomes clock position information, which is equivalent to the clock pit in the third embodiment.
- the starting end 1109 is used as the address bit information, and the ending end 111 is used as the clock position information. Conversely, the starting end 1109 is used as the clock position information.
- the terminal position 1 1 1 0 may be used as address bit information.
- the clock detection reference position 111 0 which is the end of the groove 110 6, and the start end position 110 9 of the groove 1 106 corresponding to the address bits 1 and 0 are different. And the distance between them becomes shorter. The jitter accuracy of the clock extracted from the end position 1 110 becomes worse as the distance from the end position 1 110 increases. Since the address demodulated using this clock is also affected by jitter, the address detection accuracy increases as the address bit position is closer to the end position 1 1 1 0, which is the reference position of the clock. Error rate decreases. For the above reasons, a better effect can be obtained by setting the start position 1109 as the address bit data and the end position 1110 as the clock position information.
- the tracking method of the present embodiment is a single spiral polarity switching type sample servo method as in the second and third embodiments. Therefore, in tracking control, the second and third embodiments An effect equivalent to the above is obtained.
- the format of the address in which the address bit information 1109 is collected is the same as that of the third embodiment, and the same effect as that of the third embodiment can be obtained.
- the region where the recording is performed overnight is formed by the groove 110.
- the tracking control information from the groove is limited to about 1.2 times the half width of the light beam.
- a land-group method is used, in which data is recorded both in and between grooves.
- the cross-sectional structure of the track is different between the grooves and in the grooves, it has been a major problem that the recording and reproducing characteristics are different between the grooves and in the grooves.
- the difference in this characteristic is due to the super-resolution reproduction represented by the front aperture method, the in-plane vertical center-aperture method, the double mask method, the domain wall movement method, etc., which require complicated operation of the recording / reproducing film in the reproduction operation In other words, it was a bigger issue.
- the tracking control is performed with the signal obtained from the double bits 1107 and 1108. It is possible to realize a track pitch of 1.2 times or less the half width of the light beam.
- the sector number and the segment number have been described as examples of data common between adjacent tracks.
- the present invention is not limited to these. Is included in the zone in the case of a ZCLV or ZCAV optical disc divided into zones in the radial direction. This includes zone numbers in the zone, zone configuration information necessary for playing the zone, and security information for playing the optical disc.
- an optical disk has been described as an example of a disk-shaped storage medium.
- the present invention provides, for example, a magneto-optical data file (MO) that can be recorded and reproduced, and a phase that can be recorded and reproduced. It can be applied to changeable discs (PD, DVD-RAM), read-only ROM discs, and music recording / playback discs (eg, MD).
- MO magneto-optical data file
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00901949A EP1079376A4 (en) | 1999-01-29 | 2000-01-27 | PLATFORM RECORDING MEDIUM AND TRACK PURGING METHOD THEREFOR |
US09/647,283 US6628578B1 (en) | 1999-01-29 | 2000-01-27 | Disklike storage medium and tracking method using the same |
AU23198/00A AU2319800A (en) | 1999-01-29 | 2000-01-27 | Disklike storage medium and tracking method using the same |
US10/639,191 US7002883B2 (en) | 1999-01-29 | 2003-08-11 | Disk-shaped storage medium and tracking method using the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2188499 | 1999-01-29 | ||
JP11/21885 | 1999-01-29 | ||
JP2188599 | 1999-01-29 | ||
JP11/21884 | 1999-01-29 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/647,283 A-371-Of-International US6628578B1 (en) | 1999-01-29 | 2000-01-27 | Disklike storage medium and tracking method using the same |
US10/639,191 Division US7002883B2 (en) | 1999-01-29 | 2003-08-11 | Disk-shaped storage medium and tracking method using the same |
Publications (2)
Publication Number | Publication Date |
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WO2000045382A1 true WO2000045382A1 (fr) | 2000-08-03 |
WO2000045382B1 WO2000045382B1 (fr) | 2000-09-14 |
Family
ID=26359016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/000434 WO2000045382A1 (fr) | 1999-01-29 | 2000-01-27 | Support de stockage de type disque et procede de poursuite utilisant celui-ci |
Country Status (6)
Country | Link |
---|---|
US (2) | US6628578B1 (ja) |
EP (1) | EP1079376A4 (ja) |
KR (1) | KR100376377B1 (ja) |
CN (1) | CN1203471C (ja) |
AU (1) | AU2319800A (ja) |
WO (1) | WO2000045382A1 (ja) |
Cited By (2)
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EP1324336A1 (en) * | 2000-10-02 | 2003-07-02 | Matsushita Electric Industrial Co., Ltd. | Record medium, its recorder, its recording method, its reproducing apparatus, and its reproducing apparatus |
US7167436B2 (en) | 2002-05-20 | 2007-01-23 | Canon Kabushiki Kaisha | Optical recording medium having servo area and groove section |
Families Citing this family (11)
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JP3487582B2 (ja) | 1999-11-19 | 2004-01-19 | 松下電器産業株式会社 | 光ディスク及び光ディスク装置 |
JP3507775B2 (ja) * | 2000-07-31 | 2004-03-15 | 株式会社東芝 | 情報記録方法 |
US7050386B2 (en) * | 2000-08-31 | 2006-05-23 | Matsushita Electric Industrial Co., Ltd. | Optical recording medium and misalignment measuring instrument |
JP2002342942A (ja) * | 2001-05-14 | 2002-11-29 | Toshiba Corp | 情報記憶媒体、情報記録方法、および情報記録再生装置 |
TW583650B (en) * | 2001-06-18 | 2004-04-11 | Samsung Electronics Co Ltd | Optical recording medium |
CN101075461A (zh) * | 2002-09-02 | 2007-11-21 | 三星电子株式会社 | 再现存储在光学信息存储介质中的信息的设备 |
KR100545800B1 (ko) * | 2002-10-01 | 2006-01-24 | 엘지전자 주식회사 | 이중 트랙 구조를 갖는 광디스크와, 광디스크 장치에서의데이터 기록 및 재생방법 |
TWI231933B (en) * | 2003-09-29 | 2005-05-01 | Mediatek Inc | Method of detecting data structure of non-return-to-zero data in an optical storage device |
US7133227B2 (en) * | 2004-01-21 | 2006-11-07 | Seagate Technology Llc | Head polarity detection algorithm and apparatus |
JP2007200454A (ja) * | 2006-01-26 | 2007-08-09 | Fujitsu Ltd | データ記録媒体および記憶装置 |
JP5085392B2 (ja) * | 2008-03-31 | 2012-11-28 | 株式会社東芝 | 磁気記憶制御装置、磁気記憶制御方法、磁気記憶装置 |
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- 2000-01-27 KR KR10-2000-7010696A patent/KR100376377B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
EP1079376A1 (en) | 2001-02-28 |
WO2000045382B1 (fr) | 2000-09-14 |
AU2319800A (en) | 2000-08-18 |
CN1203471C (zh) | 2005-05-25 |
EP1079376A4 (en) | 2006-08-02 |
CN1297562A (zh) | 2001-05-30 |
US6628578B1 (en) | 2003-09-30 |
KR100376377B1 (ko) | 2003-03-17 |
KR20010034695A (ko) | 2001-04-25 |
US7002883B2 (en) | 2006-02-21 |
US20040047279A1 (en) | 2004-03-11 |
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