WO1996006433A1 - Disque optique et unite de disque optique - Google Patents
Disque optique et unite de disque optique Download PDFInfo
- Publication number
- WO1996006433A1 WO1996006433A1 PCT/JP1995/001682 JP9501682W WO9606433A1 WO 1996006433 A1 WO1996006433 A1 WO 1996006433A1 JP 9501682 W JP9501682 W JP 9501682W WO 9606433 A1 WO9606433 A1 WO 9606433A1
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- Prior art keywords
- data
- area
- segment
- optical disk
- servo
- Prior art date
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
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- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
- G11B11/10563—Access of indexed parts
- G11B11/10565—Marks for track change, e.g. prepits, gray codes
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- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
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- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
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- G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
- G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
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- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
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- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
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- G11B19/28—Speed controlling, regulating, or indicating
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- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
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- 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
- G11B20/1258—Formatting, e.g. arrangement of data block or words on the record carriers on discs where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/083—Access to indexed tracks or parts of continuous track on discs
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- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
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- 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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- 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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- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10595—Control of operating function
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- 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
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- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
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- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
Definitions
- the present invention relates to a sample servo type optical disk and an optical disk drive.
- an optical disk system that scans a concentric or spiral track with a laser beam to record various data and reproduce the Z data is an optical disk system.
- Data is recorded and reproduced by rotating the optical disk at a constant linear velocity (CLV) and recording / reproducing data by performing a ZV playback or by rotating an optical disk at a constant angular velocity (CAV).
- CAV type is known.
- CAV type is known.
- a sample servo system that performs tracking control using a servo area provided in the system.
- optical disk a so-called read-only ROM disk, a write-once disk, a recordable so-called RAM disk such as a magneto-optical (M0) disk can be used.
- RAM disk such as a magneto-optical (M0) disk
- a so-called partial having a disk, ROM area and RAM area ROM disks are known.
- the inner peripheral portion of the optical disk has been conventionally used as in the ISOM 0.5.25 inch standard.
- the control information is read from the tracker or the like, and the control operation according to the control information is performed.
- the servo receives the shadow s due to the data, and as the data density increases, the reproduction of the system clock becomes sharper. It is difficult to achieve density. Also, since the group and the pit must be cut at the same time, it is difficult to create a R0M or a partial R0M disk.
- the conventional optical disk requires a dedicated decoding circuit to read the parameter information recorded on the PEP overnight. Also, since there is no address information in the above PEP, it is not possible to confirm the position of the pickup. Furthermore, since the format of the PEP was different from that of the original data recording area, it was necessary to provide a gap between them.
- an object of the present invention is to provide a sample servo type optical disk and an optical disk drive device capable of realizing a large-capacity, high-performance drive system. is there.
- Another object of the present invention is to read parameter information without requiring a dedicated decoding circuit, and furthermore, to provide a pickup level. It is an object of the present invention to provide an optical disk and an optical disk driving device capable of confirming the position.
- a plurality of substantially concentric tracks are formed, and each track is provided with a disk drive.
- a plurality of segments consisting of a servo area provided with servo pits for providing servo information and data areas are formed, and the recording position in the servo area is provided in the servo area.
- the feature is that an identification mark that provides information for identifying the segment is recorded by the.
- a data segment in which the plurality of segment powers, ', and user data are recorded, and an address segment indicating an address of the data segment are provided.
- the data segment and the address segment are identified by the identification mark.
- a sector is formed by a plurality of the above-mentioned segments, and the above-mentioned identification mark is formed by the above-mentioned identification mark.
- the leading segment is identified.
- a sector is formed by a plurality of the above segments, and the above identification sector is formed by the above identification mark.
- the first segment and the segment immediately before it are identified.
- a data segment in which the plurality of segment user data is recorded and an address indicating an address of the data segment are provided.
- a dress segment is included, and a segment is formed by a plurality of the segments.
- the data segment and the address are formed by the identification mark. The segment is identified from the segment, and the segment that is the head of the above-mentioned segment and the segment immediately before the segment are identified.
- the identification mark enables the identification of the segment immediately before the segment that is the head of the sector. Done.
- each track has a servo with respect to the disk drive.
- a servo area provided with servo pits for providing information and a plurality of segments consisting of data areas are formed, and the above-mentioned plurality of segments are radiated from each track in the radiation direction of each track.
- the address segment includes an address segment formed at the same position in the data area and recording the address information in the data area, and a data segment recorded in the user data.
- the address segment includes four addresses in the area corresponding to 11 clocks of the address information and the clock signal. It is recorded as the pit represented by the gray code of the unit, and the upper 2 bits out of the above 4 bits are equivalent to the 5 clocks indicated by the gray code.
- the area and the lower 2 bits are marked with a gray scale, and the area for 5 clocks, and the area for 1 clock between them, consists of the above 1 clock
- the area representing the upper two bits of the gray code and the area representing the lower two bits of the gray code correspond to the area for one clock.
- a pit is formed when the distance is the shortest and when one is the shortest and the other is the longest.
- a plurality of servo pit forces each have an area corresponding to two clocks with respect to the clock signal. Yes, servo pits with an interval of 5 pits or more are recorded.
- a pre-write area in which data of a certain polarity is recorded at the end of the data area of the data segment is provided. Is provided.
- a poster light area in which data of a certain polarity is recorded at the rear end of the data area of the data segment is provided. Have been.
- a plurality of substantially concentric tracks are formed, and each track has a servo with respect to the disk drive.
- Servo pits that provide information are provided, and a plurality of segments consisting of a servo area and a data area are formed in the same radial direction with respect to each of the above tracks. Therefore, a zone is formed for each of a plurality of continuous tracks, and M and N are integers, and one segment is applied.
- the relationship between the number of servo clocks SCK seg per unit and the number of data clocks per segment DCK seg is
- the number of servo clocks SCKseg per one segment is calculated as follows.
- the next zone starts from the next segment. It is started and the start segment of each zone is arranged at the same radial position.
- a plurality of substantially concentric tracks are formed, and each track has a servo with respect to the disk drive.
- Servo pits for providing information are provided, and a plurality of segments consisting of a servo area and a data area are formed in the same radial direction with respect to each of the above-mentioned tracks.
- a plurality of segments are formed at the same position in the radial direction of each track, and an address segment in which the address information grayed out in the data area is recorded. And the data segment in which the user data is recorded.
- the same address information as above is added to the data area of a part of the plurality of tracks.
- Media information grayed out by the method There characterized that you main de I ⁇ information area recorded by one over a period of several bets rack is formed.
- the media information area includes: It is formed over a plurality of continuous tracks.
- media information indicating the same contents is recorded in each data area located at the same angular position of the plurality of continuous tracks. Has been done.
- the optical disk is provided on the inner side and the outer side of the media information area.
- the media information is recorded in each data area of the partial track.
- the address segment is provided on the basis of the servo bit with respect to the information of the address information 2 bits. It is recorded as gray code using an area of five clocks of the clock signal generated by the disk drive. Also, in the optical disk according to the present invention, for example, the address segment includes four addresses in the area corresponding to 11 clocks of the address information power / the clock signal. It is recorded as a bit represented by the gray code of the dot, and the upper 2 bits are the area of 5 clocks indicated by the gray code and the lower 2 bits of the above 4 bits. The area is divided into five clock areas indicated by gray code and one clock area between them. When the pit representing the gray code of the bit and the pit representing the gray code of the lower two bits are located at the shortest distance from the one-clock area, A pit is formed when is the shortest distance and the other is the longest distance.
- the above-mentioned media information, ', and the type of rewritable or read-only media are shown.
- the optical disk according to the present invention a duplication of the above-mentioned part of the track is performed.
- the above media information indicating the same contents is recorded in the number of data eries.
- a plurality of substantially concentric tracks are formed, and each track has a servo with respect to the disk drive.
- a plurality of segments consisting of a servo area provided with a servo pit for providing information and a data area are formed, and the plurality of segments are formed in the direction of radiation of each track.
- a media information area in which media information expressed in gray code is formed in the overnight area between the track and a plurality of tracks near the outer peripheral edge. It is characterized by having been done.
- the present invention provides an optical disk drive for driving an optical disk, wherein the optical disk is formed with a plurality of tracks that are substantially concentric.
- Each track has a servo area provided with servo pits that provide servo information for the disk drive, and a plurality of segments consisting of data areas.
- the servo area has an identification mark that gives information for identifying the segment by the recording position in the servo area, and the optical disk has an optical disk.
- the drive device includes a reproducing unit that reproduces information recorded on the optical disk, and a differential unit that reproduces a reproduction signal reproduced from the identification mark by the reproducing unit.
- the present invention relates to an optical disk drive for driving a recordable optical disk, wherein the optical disk is formed by a plurality of substantially concentric tracks. Each track has a servo writer equipped with servo pits that provide servo information for the disk drive, and a plurality of segments consisting of data areas.
- the optical disk drive is provided with a pre-write area having one polarity unified at the end of the data area.
- Recording / reproducing means for reproducing data from the disk and recording data on the optical disk; and driving the recording / reproducing means to apply a low level reproduction driving power or a low level recording driving power.
- Powering means and recorded A data supply means for supplying the data to the recording / reproducing means, and a pick-up of the recording / reproducing means during recording, from the servo area to a private area for the data area.
- the driving power applying means is controlled so as to switch from the reproduction driving power to the recording driving power at the timing moved to the data, and the data having the same polarity as the one polarity is controlled.
- the data supply means is controlled so that the pick-up is supplied to the pick-up, and the pick-up is controlled at the timing when the pick-up passes through the private area.
- control means for controlling the data supply means so as to supply a desired data to the pick-up.
- FIG. 1 is a diagram showing a segment structure of an optical disk according to the present invention.
- FIGS. 2A to 2E are diagrams mainly showing the format of the servo area when the optical disk is an M0 disk
- FIG. Fig. 2B shows the servo area provided with the segment mark SGM
- Fig. 2C shows the servo area and the data area clock provided with the address mark ADM
- FIG. 2D shows a servo area provided with a first sector mark STM1
- FIG. 2E shows a servo area provided with a second sector mark STM2. Indicates a service area.
- FIG. 3 is a diagram showing a method of detecting the first pit of a servo error in the optical disk.
- FIG. 4 is a diagram showing a format of an address segment in the optical disk.
- FIG. 5 is a diagram showing a part of the access code recorded in the address segment shown in FIG.
- FIG. 6 is a diagram showing a format of a data segment in the optical disk.
- FIG. 7 is a diagram mainly showing the format of a servo error on a ROM disk.
- FIG. 8 is a diagram showing a configuration of one frame and one data sector in the optical disk.
- FIG. 9 shows the data format of the data sector in the above optical disk.
- FIG. 10 is a diagram showing a reproduction signal based on the reference pattern of the data sector in the optical disk.
- FIG. 11 is a diagram showing parameters for setting an area division in the optical disk.
- FIG. 12 is a diagram showing a state of area division in the optical disk.
- FIG. 13 is a diagram showing a format of a data sector in the optical disk.
- FIG. 14 is a diagram showing an arrangement state of GCP segments on the optical disk.
- FIG. 15 is a diagram showing the structure of the above-mentioned GCP segment.
- FIG. 16 is a diagram showing the relationship between the page number of the GCP segment and the frame address of the address segment in the above optical disk.
- FIG. 17 is a diagram showing the contents of the GCP information of page number 1 of the above-mentioned GCP segment.
- FIG. 18 is a diagram showing the contents of the GCP information of page number 2 of the above-mentioned GCP segment.
- FIG. 19 is a diagram showing the contents of the GCP information of page number 3 of the above-mentioned GCP segment.
- FIG. 20 is a diagram showing the contents of the GCP information of page number 4 of the above-mentioned GCP segment.
- FIG. 21 is a diagram showing the content of GCP information of page number 5 of the above GCP segment.
- FIG. 22 is a diagram showing the content of the GCP information of page number 6 of the above GCP segment.
- FIG. 23 is a diagram showing the contents of the GCP information of page number 7 in the above-mentioned GCP segment.
- FIG. 24 is a diagram showing the contents of the GCP information of page number 8 of the above-mentioned GCP segment.
- FIG. 25 is a diagram showing the content of the GCP information of page number 9 of the above-mentioned GCP segment.
- FIG. 26 is a diagram showing the contents of the GCP information of page number 10 of the above-mentioned GCP segment.
- FIG. 27 is a block diagram showing a configuration of the optical disk drive device according to the present invention.
- FIG. 28 is a diagram illustrating a position where the focus is pulled in the optical disk drive device.
- FIG. 29 is a timing chart showing a sampling timing for extracting clock information from the RF signal waveform of the optical disk drive device in the reproduction of a double bit. It is a mining party.
- FIG. 30 is a block diagram showing a configuration of a scramble processing circuit provided in a recording / reproducing circuit in the optical disk drive device.
- FIG. 31 is a diagram showing a scramble table of the above scramble processing circuit.
- the optical disk according to the present invention is an optical disk of a zone CAV and a sample-and-both type.
- the optical disk according to the present invention will be described by taking, as an example, a ROM disk dedicated to reproduction and a recordable MO disk. Unless otherwise specified, the contents that are common to both disks shall be explained.
- the optical disk according to the present invention has a segment of one track; a segment of 1400 (segment 0 to segment 13 9). 9), and the segments are classified into address segment ASEG and data segment DSEG.
- Each track of ASEG contains the position information in the radial direction on the disk, that is, the track number and the position information in the X-axis direction, that is, the segment. Numbers are pre-recorded by pits. That is, a pit is formed when the optical disk is created based on the positional information.
- This address segment ASEG exists every 14 segments, and exists 100 times in one track. Then, as shown in FIG. 8, the force from one address segment ASEG to the next address segment ASEG is' 1 frame, and track 1 There are 100 frames in a lap.
- the data segment DSEG is the 13 segment between the two consecutive address segment ASEGs. Overnight segment DSEG has 1300 segments in one lap.
- Each segment consists of 2 16 servo clocks of area, 24 servo clocks of servo area ARs and 19 2 servo clocks. It consists of a lock area AR d and a lock.
- the data area AR d is composed of an address area AR da and a laser control area AR db.
- ⁇ Servo area ARs have two servo clocks as shown in FIGS. 2A to 2E.
- the three pits P a, P b, and P c having a length of 5 servo clocks are recorded in advance with a distance of 5 servo clocks between them, and 6 pits are recorded in advance.
- a focus sample area AR fs of the length of the clock is provided.
- the pits are formed by setting the pits Pa, Pb, and Pc of the servo area ARs to the length of two servo clocks each. no portion or mirror portion Ri is Do rather small, the ghosting pin Tsu bets such as Ru can and child to Ku the difficulty generating a (of et al generated at the time of disk molding, at the time of access, peer Tsu door P Since the RF signals are reproduced stably from b and P c, various servo signals such as tracking sensor signals are stabilized based on the RF signals reproduced from pits P b and P c.
- the distance between the centers of the pits Pa, Pb, and Pc is set to be equal to or more than a predetermined distance, so that the pits Pa, Pb, and Pc can be generated. Data interference between RF signals reproduced from Pb and Pc can be extremely reduced. Ku To each pin Tsu preparative P a, P b, the distance P c 5 Saboku lock or Hanasuko and is not to demand.
- the second pit Pb located in the 11 to 12 clock period and the third pit Pc located in the 16 to 17 clock period are the 1/4 track in the radial direction of the disk from the track center
- the tracking error is determined by the difference between the amplitude values of the RF signals reproduced from these pits Pb and Pc.
- the servo clock is determined by the difference between the amplitude values of both shoulders of the RF signal reproduced from these pits Pb and Pc. This phase information is given, and by adding this phase information, clock phase information independent of the tracking state is given.
- the first pit Pa at the beginning of the servo area ARs is an address mark ADM indicating that the segment is an address segment ASEG depending on its position.
- the first segment mark STM 1 indicating that the segment is the first segment of the segment, and the next segment is the first segment of the segment. Are classified into the second sector mark STM2 and the segment mark SGM that does not correspond to any of the above.
- This first pit Pa is the address mark ADM when it is located in 3 to 4 clock periods as shown in FIG. 2C, and 4 to 5 as shown in FIG. 2D.
- the starting position of each sector will be described later with reference to FIG.
- the information indicated by the first pit Pa is, for example, as shown in FIG. 3, detected by the maximum difference value detection, that is, by the so-called differential detection method. Thus, it can be identified by examining the position where the reproduced RF signal takes the maximum amplitude value.
- the first mark Pa at the beginning of the servo area ARs allows the address mark ADM or the first sector mark STM 1 and the second sector mark STM 1 and 2 Since the information indicating the sector mark STM 2 is given, it is not necessary to record the sector tamper or track address in each sector.
- the 16-bit track address [AM] is included in the address segment ASEG as the radial position information of the disk. ], [A2], [A3], [A-shi] and their access angle ACC, consisting of the [P] force, and the tangential direction.
- the frame code FRC consisting of the frame addresses [FM] and [FL] is gray-coded and recorded in pits in advance as the position information.
- MSN MSN
- A2 11 to 8 bits
- A3 7 to 4 bits (3SN)
- AL 3 to 0 bits (LSN).
- the least significant bit of the 4-bit only when it is "1", the value obtained by taking the one's complement of the next 4-bit. This ensures that only these access code forces change between adjacent tracks, ie, “1” and “return code”.
- the adjacent bit is calculated as the value obtained by adding the one's complement to the next 4-bit. Only change these access codes between racks; one turn, one turn By doing so, the pits that represent the upper two bits of gray code and the lower two bits that represent the gray code for the central one-clock area
- the above-mentioned central one area clock pitch is Since it is formed, the central 1-pik area does not become a mirror part that is continuous in the radial direction, and the resin flow is made uniform during disk molding, resulting in high quality. This makes it possible to perform disk shaping.
- FIG. 5 shows a part of the access code ACC, the frame code FRC, A Drain Septimius Gume down preparative ASEG data Nji down sheet catcher Le direction information
- This frame code is capable of recording 8 bits of information; ', in fact, its value only exists in the number 0 to 99 of the address segment ASEG.
- the focus sample area AR fs of the servo area AR s is a mirror part, and the optical disk drive has a focus sensor area AR fs.
- the mirror area has an area for 6 clocks as a space for sampling.
- the data area AR d of the data segment DSEG is, as shown in FIG. 6, a data area for the data clock of 1776 to 3668 data clocks for recording the user data. It consists of AR d and a pre-write area for 12 data clocks AR PR and a boss write area AR P0 for 4 data clocks. The number of data clocks changes according to the zone.
- the above-flops Li La Yi example Li A AR PR is, M 0 disk a is a tree to disk Dora Lee Breakfast is from the start of the irradiation of the laser is against the data recording stable temperature It is provided not only to secure the necessary distance for preheating until the temperature becomes low, but also to be used as a clamp error for suppressing DC fluctuation due to birefringence of the MO signal during reproduction. It should be noted that, because the Ru bet the compatibility of Read format, also in a ROM disk, Prin La Yi example Li A AR PR of this is provided. In addition, the post-write area AR PO is provided on the M0 disk at the time of the overwrite, so that the recorded data is not erased. To avoid the evening rain caused by the edge of the group Gr obtained?
- This magneto-optical disk is bulk erased in one direction at the time of shipment. Its to, is against the above-flops Li La Yi example Li A AR PR, in the call to record the Parc erase direction and the same polarity of the data, Ri by the residual heat shortage of the main de I ⁇ since Prin La Yi example data that Li ⁇ AR PR to the data have been recorded even if rather been properly recorded does not change, that Ki out and the child to play a stable signal.
- FIG. 6 is a diagram of a magneto-optical disk. In the case of a ROM disk, the group Gr in FIG. 6 is deleted.
- the area where data is rewritten does not have a pit formed in advance. Both the data and the pit are wider than the read-only optical disk that is formed in advance as a pit. Therefore, as shown in FIG. 6, by providing the group Gr at a portion corresponding to the data area AR d, the mirror portion is reduced and the servo bit is reduced. This can reduce the adverse effects on disk molding. Since the group G r is not used for tracking control, it is not required to have an accuracy such as its depth. In this embodiment, the depth of the laser beam is set to 8/8, where S is the wavelength of the laser beam. As shown in Fig. 7, in the read-only ROM disk, the anchor area Pan has an area for three data clocks at the beginning of the data area ARd. By providing a mirror, the number of mirrors is reduced, and the negative effect on the servo pit during disk molding is reduced.
- one data sector is composed of 66 notes of reference data and 2408 notes of user data (D0 to D 204 7), ECC 25 56, * it (E 1, E 16, 16), CRC 8, 'it (CRC 1 to CRC 8), user defined data 4 It consists of a total of 0 notes (UD), 2 4 1 8 notes, and * notes.
- Figure 9 shows a data format of 2352, * bytes excluding the above-mentioned reference data 66 bytes.
- the waveform of the reproduced RF signal is as shown in Fig. 10, as shown in Fig. 10 for 8 T turns for 4 notes and 2 T patterns for 12 notes.
- Each block consists of 4 blocks, with 1 block as a block, and 2 bytes of all ⁇ notches as a margin for setting further detected information 66 A specific pattern of bytes is recorded.
- the above 8T noise is used to set the ternary level (high H, medium M, low L) for partial response (1, 1) and data detection by Viterbi decoding.
- the 2T return is used to correct a DC-like shift in the pit position due to a change in recording power or the like during reproduction.
- This optical disk is a so-called zone CAV disk, and as shown in FIGS. 11 and 12, a portion corresponding to 736 tracks from the outer peripheral side is used.
- GCP Gram Code P art
- Area 2 tracks of track, 5 tracks, control track of 5 tracks, 2 tracks of track No Track for Tracks, 5 Tracks for Test Tracks, 848 Tracks for User Zones 0 and 864 Tracks User zone 1 for minutes, User zone 2 for tracks 880, User zone 3 for tracks 12 and User zone 4 for tracks 9 and 4 976 Track user zone 5, 1 0 2 4 Track user zone 6, 1 0 5 6 Track user zone 7, 1 1 2 0 Track user zone N 8, 1 1 8 4 Track user zone 9, 1 2 16 Track user zone 10 0, 1 2 9 6 Track user zone 1 1, 1 3 9 2 User zones for tracks 1 2 and 1 4 8 8 User zones for tracks 1 3 and 1 6 9 6 User zones for tracks 1 4 and 7 0 Tracks User zone 1 5, 5 track test track, 2 track buffer track, 5 track control track , 2 tracks of fat track, and 82
- the number of tracks in a zone is defined as Tz
- Dsz the number of data segments required for one sector in a certain zone
- Dt the number of sectors
- the number of tracks should be determined so that Then, the value of K is determined by using a value that is close to the data capacity per zone obtained by dividing the data capacity of the entire disk by the total number of zones as the value of K.
- the number of sectors S z is allocated from the outer zone, and the data clock frequency is set so that the recording density of the innermost track in that zone does not exceed a predetermined density. By determining, you can get all the parameters overnight.
- the capacity of one sector is assumed to be constant. Here, it is 2 3 5 2 Byte.
- the segment is opened from a certain segment.
- the segment ends, and even if there are extra bytes in the last segment, the extra bytes
- the next sector is started from the next segment without the next sector from the next segment.
- the number of sectors may not be the same as the number of other zones in relation to the recording area, but may be a fraction.
- the zone up to the track where the sector ends is the innermost zone.
- the user zone is divided into 16 zones as described above, and the servo clock is generated by multiplying the servo clock SCK by MZN.
- the data clock DCK determines the number of data notes (byte Z seg) and the number of segments per sector (seg Z sector) that fall into one segment. I have.
- M corresponds to the clock value in FIG. 11, and N is 24. That is, if the number of servo clocks in the servo area ARs is N, and the overnight clock DCK is MZN times the servo clock SCK, the servo clock in one segment
- the number of clocks SCK seg and the number of data clocks DCK seg are
- N and M are integers.
- one track is divided into 140 segments, and one hundred three hundred of these are data segments DSEG.
- user data is not recorded, so 100,000 data segments of the DSEG 100 segments should be filled with GCP information such as media information.
- GCP segment As shown in Figure 14, the GCP seg is assigned to the data segment in the middle of each address segment ASEG.
- the GCP segment GCP seg is composed of a servo area ARs, a GCP area AR gcp, and a blank AR blk.
- the area AR gcp contains seven 4-bit data gray-coded in the same way as the access code ACC of the address segment ASEG described above, that is, [GCPH] and [GCP 2]. , [GCP 3], [GCPL] and its The GCP code consisting of the liter [P], and the page numbers [PNH] and [PN] are recorded in pits, respectively.
- the GCP code is provided with a suffix [P] to enable error detection. Also, page numbers [PNH] and [PNL] are added, so that a plurality of media information can be given as GCP information.
- the page numbers [PNH] and [PNL] above are strengthened against errors by recording the same information in [PNH] and [PNL] for up to 16 pages. I can do this.
- the address (frame) recorded in the address segment ASEG is used. Address) by placing each GCP segment GCP seg in a state where the last digit of the GCP seg matches the page number of the GCP seg. You can eliminate misreading of the frame number and GCP segment page number of GCP seg. In addition, since the track has 100 frames in one round, the GCP information of 10 pages, that is, 10 types of GCP information, is repeatedly recorded 10 times. Mistakes in reading each of the 10 types of GCP information can be reduced.
- the GCP information recorded in the GCP segment GCP seg is, for example, as shown in FIG. 17, page number 0 is information indicating the media information Z media type.
- Bits 15 to 14 provide information indicating the physical format of the media, such as the presence or absence of a groove and the presence or absence of a sector mark, and bits 7 to 4 provide media such as MO and ROM.
- Information indicating the media format is given, and bits 3 to 0 provide media generation information.
- the GCP information of page number 1 is data information and information indicating the error correction format.
- Bits 15 to 8 are used for the sample servo method, logical CAV, and NRZI code. Gives data information indicating that the data is an error, etc., and gives information indicating the error correction format in bits 7-0.
- the GCP information of page number 2 is information indicating the physical address of the outer peripheral SFP track as shown in FIG. 19, and the outer peripheral side is indicated by bits 15 to 0. Gives information indicating the physical address of the roll track.
- the GCP information of page number 3 is information indicating the inner SFP track physical address, and bits 15 to 0 Gives information indicating the physical address of the control track on the inner circumference.
- the GCP information of page number 4 is information indicating the maximum read power
- bits 15 to 8 indicate the information indicating the maximum read power.
- Bits 7 to 0 are preliminary information.
- the GCP information of page number 5 is information indicating the number of segments per outer peripheral control track clock ratio Z sector.
- information indicating the number of clocks in the outer control track that is, the clock value M in FIG. 11 is given by bits 15 to 8, and bits 7 to 0 are given.
- the GCP information of page number 6 is information indicating the inner control track clock ratio / the number of segments per sector. Therefore, bits 15 to 8 give information indicating the number of clocks in the inner control track, and bits 7 to 0 provide the segments per sector. Provide information indicating the number of comments.
- the GCP information on page number 7 indicates the number of clocks per segment and the number of sub-clocks per segment as shown in Figure 24.
- bits 15 to 8 give information indicating the number of clocks per segment
- bits 7 to 0 give the number of clocks per segment.
- the GCP information of page number 8 is information indicating the number of segments per track, and is represented by bits 15 to 0. Gives information indicating the number of segments per hit.
- the GCP information for page number 9 is, as shown in Figure 26, Information indicating the number of address segments per track / reserve, information indicating the number of address segments per track in bits 15 to 8 Give a bit? 0 is preliminary information.
- the above control track includes the above-mentioned 20-point, 10-point media such as the GCP information of the unit, laser wavelength and reflectance, and the track pitch.
- 7 Bytes of data such as the number of bytes in the physical information, various physical block address data, the number of fields in various fields, the number of data clocks in various areas, and the number of zones.
- 32 bytes of band information such as system information and definition data of each zone, are recorded.
- information A number of segments / track) indicating the number of segments per track (1 no ⁇ it)
- Information B indicating the start track number (2 bytes) of each zone
- D number of segments / sec evening
- the serial sector address is converted into a zone number E and an offset number F using a table, and the serial number is converted from the offset number F.
- each segment mark STM 1 and STM 2 indicate the data segment DSEG at the head of the sector and the segment immediately before it, so that one segment is used. Even if the term becomes a defect, the sector does not become defective, and the occurrence rate of defective sectors can be reduced.
- a servo pit having a length of two clocks with respect to the generated servo clock SCK is recorded in the servo area ARs.
- the scrambled recording data is recorded as NRZI modulation data in the data segment DSEG, so that the recording pattern is randomized.
- the probability that a fixed pattern occurs continuously can be reduced. Therefore, it is possible to stably perform disk shaping, and to reduce the memory capacity in Viterbi decoding of the reproducing apparatus.
- the private area AR PR and the poster area AR PO provided in the data area AR d of the data segment DSEG are used.
- data can be reliably recorded in the data area ARd.
- servo information and address information are given by the servo area ARs and the address segment ASEG which are arranged at equi-angled positions.
- the address information can be read independently of the recording / playback in a short time by the servo clock SCK obtained based on the servo information, and a stable high-speed seek can be performed. Can be done.
- the control software can be simplified.
- the end segment of the zone and the start segment of the next zone are linked, so that no useless segment is generated.
- the start segment of each zone is placed at the same position of each track in the SB, and each zone starts with the segment of the same segment number. Can be easily managed.
- the GCP area over multiple tracks has the same format as the address information recorded in the address segment ASEG due to the GCP area. Since gray-scaled media information is provided, the decoder can be used also as a decoder for detecting address information without requiring a dedicated decoder for detecting the media information in the reproducing apparatus. Can be done. Also, no special signal generator is required for cutting. Further, the address information can be read during reading of the GCP area on the playback device side, so that the position of the pickup can be reliably managed.
- the media type is provided by the above GCP area.
- Media information indicating types and formats can be provided to the playback device.
- information for reading the control track information can be provided to the reproducing apparatus by the GCP area.
- the GCP area provides the same content of media information multiple times in a track, so that highly reliable media information can be provided. Can be given to the playback device.
- each segment located in the radial direction of each track of the GCP area gives media information of the same content, the playback device side You can read out media information without tracking.
- the same media information is provided by the GCP areas provided near the inner peripheral end and the outer peripheral end. You can select either the port or the outer access start.
- Such a recording / reproducing apparatus using a magneto-optical disk and a ROM disk of a format as a recording medium has a control circuit block 1 as shown in FIG. 27, for example. It consists of a disk drive 200 and a disk drive 200.
- the basic configuration of the recording / reproducing apparatus shown in FIG. 27 is the same as that shown in Japanese Patent Application No. 5-244542.
- commands and data are transmitted and received to and from a host computer 300 connected via a SCSI interface.
- the processing for transmitting and receiving the command and data is performed by the controller 101 of the control circuit block 100.
- Controller 1 above 01 is added to the data from the host computer 300 with a CRC and error correction code, etc., and passed to the disk drive 200.
- error correction is performed on the data from the disk drive 200, and the user data portion is transferred to the host computer 300.
- the servo system of the disk drive 200 and the command to each block are executed digitally to perform necessary processing for the command from the controller 101. This is performed by the signal processing circuit (DSP) 102.
- DSP signal processing circuit
- the DSP 102 is operated in a state where the optical disk 201 is mounted on the spindle motor 203 by the loading mechanism 202.
- the optical disk 201 is turned on and off.
- the spindle driver, '204 is instructed via the I / O block 103 to rotate the spindle motor 203.
- the spindle driver, '204 outputs the spindle on / off signal SPD when the spindle motor 203 reaches a predetermined rotation speed, and the DSP 102 Inform the user that the rotation is stable.
- FIG. 28 for example, as shown in FIG.
- the DSP 102 receives the pickup drive through a pulse width modulation (PWM) circuit 104. 5 until the pick-up 205 comes into contact with the strobes 200 A and 200 B near the outer peripheral edge or the inner peripheral edge of the optical disk 201. Move the beam spot so that it is located in the recording area, for example, the GCP area outside the zones 0 to 15. If focusing is performed by a recording area, there is a risk that data may be erased by mistake, such as in the case of a highly sensitive magneto-optical disk.
- erroneous data erasure can be prevented by performing focus pull-in on an area where data is formed in a pit such as the above-mentioned GCP area.
- the DSP 102 can record whether the optical disk 201 is a read-only optical disk based on the media information reproduced from the GCP area.
- C The above GCP area has the same format as the address information and is grayed out in the GCP area. Since the media information is recorded, the address information and the media information can be read and determined in the same manner. In addition, since the media information that is coded in the gray scale is recorded in the GCP areas of a plurality of tracks, even if the position control of the beam spot is inaccurate, even if the position is incorrect, Dear information can be read reliably.
- the DSP 102 converts the I / O block 106 to DZA from the I / O block 106.
- the laser diode 207 is connected to the laser diode 207 through the detector 107, and the bias current LDB of the laser diode 207 provided in the pickup 205 is set. Then, a command is issued to the servo system timing generator (STG) 108 that controls on / off of the laser diode 207 so as to emit the laser.
- This bias current LDB is set to a high level during recording and set to a low level during reproduction.
- the laser beam When the laser is emitted from the laser diode 207, the laser beam enters a photodetector 208 provided in the pick-up 205, and the laser beam enters the photodetector 208.
- the detection output by the photodetector 208 is output by an I-V conversion block via a current / voltage (I-V) converter & matrix amplifier 209.
- APC signal F APC Input to the multiplexer 109.
- the front APC signal F—APC is digitized by the A / D converter 110 as a signal selected in a time-sharing manner by the multiplexer 1 • 9, and is converted into an IZO block. Input to DSP 102 via clock 111.
- the DSP 102 recognizes the light amount of the laser beam from the digitalized front APC signal F-APC and converts the light amount control data calculated by the built-in digital filter into the light amount control data. By varying the bias current LDB based on this, control is performed so that the amount of light emitted from the laser diode 207 becomes constant.
- the DSP 102 causes the current to flow from the PWM circuit 104 to the focus driver of the pickup driver 105, thereby causing the pick-up.
- the laser light reflected from the optical disk 201 is detected by the photodetector 208, and the photodetector 208 detects the laser beam.
- the detection output by the I-V conversion & matrix amplifier is converted into a voltage by the I-V conversion block of 209, and is converted to a voltage via the matrix-amplifier. Input to the multiplexer 109 as a focus error signal FE.
- the focus error signal FE is a signal selected in a time-sharing manner by the multiplexer 109 in the same manner as the front APC signal F-APC, and is an AZD converter 110 And is input to DSP 102 via block 10 11.
- the DSP 102 converts the focus control data obtained by digitally performing a filtering process on the digitized focusing error signal FE into the PWM circuit 1 described above. 0 4 Power, pick-up drive, ⁇ Return to focus drive of 105 By doing so, a servo loop for focus control is configured. When the focus control is stabilized, it can be obtained by the I-V conversion & matrix amplifier 209 from the detection output by the photo detector 208.
- the servo clock signal SCK from the servo system clock generation (SPLL) circuit 114 and the data clock are supplied to the AZD converter 113 via the clock selector 115.
- the data clock signal DCK from the clock generation (DPLL) circuit 117 is selectively supplied.
- the clock selector 115 selects the servo clock signal SCK for the reproduced RF signal from the servo area, and selects the servo clock signal SCK for the reproduced RF signal from the data area. It is controlled by the servo timing: STG 108 so that the data clock signal DCK is selected.
- the clock at the time of servo pull-in operation is the free-running frequency of the servo system clock generation (SPLL) circuit 114.
- SPLL servo system clock generation
- the SPLL circuit 114 checks the pattern of the pit by checking the amplitude difference of the RF signal digitized by the AZD converter 113. Click on the same sequence of pits as the predetermined servo area, and look for a "turn. Then, when a pattern is found, the next pattern should appear. In other words, open the window with the servo error of the next frame, and then check again whether the pattern matches .. If this operation is repeated a certain number of times, the SPLL circuit 11 Assuming that the phase of the servo clock SCK generated by 4 is ⁇ -clicked with respect to the phase of the optical disk rotation, for example, as shown in Fig.
- phase error data [(2-b1) + (c2-c1)] / 2. .
- ⁇ O Burupi Tsu door P b, 2 pieces of ⁇ O Burupi Tsu door to c is we get in a child taking the amplitude difference between the two shoulders of the P c of the phase information in the mono-Boeing Li ⁇
- the gain fluctuation resulting from the amplitude change due to the tracking position is absorbed.
- the optical disk reproducing apparatus can recognize the scan position of the pickup 205 in units of segments, so that the first bit Pa
- the position can also be recognized, and the window is opened at the four positions A. B, C, and D shown in FIG. 3 described above, and the window is opened at the four positions A, B, C, and D.
- Maximum amplitude in the sampled RF signal Find a location.
- the result is position A, it is an address mark ADM, and it can be recognized that this segment is the address segment and is the head of the frame. Therefore, it is possible to clear the built-in frame counter (not shown) and synchronize the frames. Since one frame consists of 14 segments, a window is opened every 14 segments, and frame synchronization is performed when continuous recognition can be performed as an address mark. Is determined to be locked.
- the access code ACC and the frame code FRC can be recognized by the address deco overnight (ADEC) 116.
- ADEC address deco overnight
- the turn, which is grayed out by 4 bits, is decoded by checking the match with the gray code table shown in Figure 4 above.
- the reproduced RF signal at each of the positions a, b, c, and d shown in FIG. Determined by the differential detection method.
- the reproduced RF signal at each of the positions e, f, and g.h shown in FIG. 4 is sampled, and the position where the amplitude value is maximized is determined.
- the track addresses [AM] to [AL], no, 're-write [P], frame address [FM], and [FL] are decoded.
- the DSP 102 reads out the decoding result stored in this register evening to determine the current position of the pickup 205. Can be detected.
- the table is compared with the table inverted or non-inverted depending on the LSB force, '1J force,' 0 '.
- the first decoded frame code FRC is loaded in the frame counter in the evening, and the frame counter is incremented frame by frame.
- the ADEC 116 decodes the GCP information in the same manner as the above track address and frame code FRC. However, instead of using the addressless segment, the GCP segment where the GCP information is recorded is read out using the GCP seg to read out the decoding result stored in the register. You can check the contents of AR gcp.
- the DSP 102 calculates the moving speed of the pickup 205 while reading the gray-coded track address at the time of seeking, and calculates the PWM Circuit 104, Drive-up, Drive-in 105, Drive-in, Pick-up via Slide motor 205 By moving the pick-up 205, the pick-up 205 is moved to the target track.
- the pickup when the pickup arrives at the target track, it starts a tracking operation.
- the tracking error signal ⁇ ⁇ can be obtained by taking the difference between the amplitude values of the RF signals reproduced from the two wobbled bits in the servo area.
- the DSP 102 performs tracking control data obtained by digitally filtering this value.
- the evening is fed back from the PWM circuit 104 to the pick-up driver 105 to form a servo loop for tracking control.
- STM 2 opens windows at the four positions A, B, C, and D shown in FIG. 3 above, and samples at these four positions A, B, C, and D.
- the position of the maximum amplitude in the RF signal is B, it indicates that it is the first segment of the sector, and when it is C, it indicates one of the first segments. Indicates that this is the previous segment.
- the segment at the beginning of the segment converts the sector address given by the host computer 300 into a physical sector, and determines which power 5, which is determined Tsu by the and the child to calculate the door rats whether it is what th in the back Gume down the door of the click, the probability that the two types of SECTION Tamar click is the de-I full-et-click and at the same time Is empirically less than 10— ID , which makes the probability of defective sectors extremely small.
- the data clock generation (DPLL) circuit 117 is a data clock obtained by multiplying the frame-synchronized servo clock SCK obtained by the SPLL circuit 114 by MZN times. A clock DCK is generated, and the data clock DCK is supplied to a data system timing generator (DTG) 119 and a recording / reproducing circuit 120.
- the data clock DCK generated by the data clock generation (DPLL) circuit 117 is used to reproduce the reference RF signal shown in FIG. Based on the phase in the lead clock phase compensation area, the phase is compensated by the lead clock phase compensation (RCPC) circuit 121.
- the recording Z reproduction circuit 120 supplies user data recorded from the host computer 300 via the controller 101 in the recording operation mode. Is done.
- the recording Z reproduction circuit 120 includes, for example, a scramble processing circuit having a configuration as shown in FIG.
- the scramble processing circuit shown in Fig. 30 adds the seven-stage flip-flop 131, and the outputs of the first stage and the last stage of the flip-flop 131, (EXOR), and the first adder 132, which returns to the first stage of the flip-flop 131, and the output of the first adder 132, and the recording data are added (EXOR). ) And a second adder 13 3.
- This scramble processing circuit is configured such that the flip-flop 1311 is cleared at the start of each sec- tion, for example, as shown in FIG.
- a 127-cycle random number as shown in the scramble table is generated as the output of the first adder 1332, and the second adder 1333 is applied to the recorded data.
- Ri Y X 7 + X + 1 in and the child for adding said random number (EXOR) in SECTION data unit.
- the recording / reproducing circuit 120 converts the user data scrambled in this way into NRZI sequence data synchronized with the data clock DCK. Modulate.
- the initial value is set to “0” for each segment.
- the modulation signal WDAT is supplied to the magnetic head 211 via the magnetic head driver 210.
- the magnetic head 211 generates a magnetic field corresponding to the modulation signal WDAT, and the magnetic field is heated to the Curie temperature by the laser beam emitted from the laser diode 207.
- the NRZI sequence data is recorded by applying the data to the data array ARd of the magneto-optical disk 201.
- the pickup 205 is read from the above servo area.
- the laser diode 207 is switched so as to switch from the reproduction driving power to the recording driving power.
- Nozzle 206 is controlled by the servo timing generator (STG) 108 described above. Its to, above Kipi kup 2 ⁇ 5 is in the pre-La Yi example Li A AR PR evening Lee Mi in g that has passed through the, the particular polarity data of the above-flops Li La Lee Bok et
- the recording Z reproducing circuit 120 is controlled by the data system timing generator (DTG) 119 so as to record the rear ARPF ⁇ .
- the above-mentioned of the particular polarity of the data is the above-flops Li La Yi example Li A bulk erase the same and the polarity data of the AR PR.
- Ni will Yo of this, and a pair of the above-flops Li La wells E Li ⁇ AR PR, Roh, in a 'torque erase direction and the child to record the same polarity data of, residual heat lack of media since the pre-La Yi example data that re-a AR PR to the data have been recorded even if rather Rena normally recorded does not change Ri by the, Ru can and child to play a stable signal.
- the playback obtained by the I-V conversion & matrix amplifier 209 from the detection output by the photo detector 208 is used.
- the M0 signal is clamped to an appropriate potential by the selector & clamp 112 and then AZD-converted by the AZD converter 113 to convert the signal to the above-mentioned signal. It is supplied to the reproduction circuit 120.
- the recording Z reproduction circuit 210 matches the partial response (1, 1) of the reproduction M0 signal digitized by the A / D converter 113 to the reproduction M0 signal.
- the NRZI sequence data is decoded by Viterbi decoding.
- the NRZI sequence data is converted into NRZ sequence data in segment units, and then descrambled in segment units to be converted into reproduced data.
- This playback data Is transferred to the host computer 300 via the controller 101.
- the data pattern is randomized and the value cannot be determined during Viterbi decoding.
- the probability that the data sequence will continue is reduced, and the memory capacity for Viterbi decoding can be reduced.
- the pit arrangement is randomized on the R0M disk, the ratio of the presence or absence of the pit on the board approaches 50%, and the disk Molding becomes easier.
- the tracks formed concentrically or spirally are composed of a plurality of segments each composed of a servo area ARs and a data area ARd.
- Address segment that is formed by being divided into multiple sectors and tracks addresses are recorded
- the address mark indicating ASEG and the data at the beginning of the sector are recorded
- the data segment DSEG to be recorded and the segment indicating the previous segment are applied to the recording and Z playback control means for the magneto-optical disk recorded in the servo area. Therefore, by detecting the maximum difference value with respect to the reproduced signal of the servo area, the address mark and each sector mark recorded in the servo area ARs are detected, and the target sector is detected. Record data for data Playback can be performed.
- the recording / reproducing apparatus uses a medium that is converted from the GCP zone of the magneto-optical disk into a medium coded in the same format as the address information of the address segment ASEG. Read the media information and read this media The control information can be read from the control track based on the information, and the control operation can be performed based on the control information.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/632,428 US5978350A (en) | 1994-08-25 | 1995-08-24 | Optical disc and optical disc driving device |
JP50794796A JP3383977B2 (ja) | 1994-08-25 | 1995-08-24 | 光ディスク及び光ディスク駆動装置 |
AU32649/95A AU3264995A (en) | 1994-08-25 | 1995-08-24 | Optical disk and optical disk drive device |
KR1019960702110A KR960706167A (ko) | 1994-08-25 | 1995-08-24 | 광디스크 및 광디스크 구동 장치(Optical disc and optical disc driving device) |
DE69528574T DE69528574T2 (de) | 1994-08-25 | 1995-08-24 | Optische platte und optisches plattenantriebsgerät |
EP95929222A EP0726572B1 (en) | 1994-08-25 | 1995-08-24 | Optical disk and optical disk drive device |
US09/686,319 US6292451B1 (en) | 1994-08-25 | 2000-10-10 | Optical disc and optical disc driving device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20087794 | 1994-08-25 | ||
JP6/200877 | 1994-08-25 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/082,733 Division US6282162B1 (en) | 1994-08-25 | 1998-05-21 | Optical disc and optical disc driving device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996006433A1 true WO1996006433A1 (fr) | 1996-02-29 |
Family
ID=16431732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/001682 WO1996006433A1 (fr) | 1994-08-25 | 1995-08-24 | Disque optique et unite de disque optique |
Country Status (8)
Country | Link |
---|---|
US (3) | US5978350A (ja) |
EP (2) | EP1008985A2 (ja) |
JP (1) | JP3383977B2 (ja) |
KR (1) | KR960706167A (ja) |
CN (3) | CN1106640C (ja) |
AU (1) | AU3264995A (ja) |
DE (1) | DE69528574T2 (ja) |
WO (1) | WO1996006433A1 (ja) |
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EP1026670B1 (en) | 1999-02-02 | 2001-12-12 | Matsushita Electric Industrial Co., Ltd. | Optical recording medium and recording/reproduction method and apparatus therefor |
US6552982B1 (en) * | 1999-03-08 | 2003-04-22 | Matsushita Electric Industrial Co., Ltd. | Information recording medium, information recording and reproduction method, and information recording and reproduction apparatus |
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1995
- 1995-08-24 AU AU32649/95A patent/AU3264995A/en not_active Abandoned
- 1995-08-24 DE DE69528574T patent/DE69528574T2/de not_active Expired - Fee Related
- 1995-08-24 US US08/632,428 patent/US5978350A/en not_active Expired - Fee Related
- 1995-08-24 EP EP00104708A patent/EP1008985A2/en not_active Withdrawn
- 1995-08-24 CN CN95190983A patent/CN1106640C/zh not_active Expired - Fee Related
- 1995-08-24 KR KR1019960702110A patent/KR960706167A/ko not_active Application Discontinuation
- 1995-08-24 WO PCT/JP1995/001682 patent/WO1996006433A1/ja active IP Right Grant
- 1995-08-24 JP JP50794796A patent/JP3383977B2/ja not_active Expired - Fee Related
- 1995-08-24 EP EP95929222A patent/EP0726572B1/en not_active Expired - Lifetime
-
1998
- 1998-05-21 US US09/082,733 patent/US6282162B1/en not_active Expired - Fee Related
-
2000
- 2000-10-10 US US09/686,319 patent/US6292451B1/en not_active Expired - Fee Related
-
2002
- 2002-05-06 CN CN02119319A patent/CN1388531A/zh active Pending
- 2002-08-27 CN CN02132187A patent/CN1419233A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0536208A (ja) * | 1990-06-13 | 1993-02-12 | Hitachi Ltd | マルチメデイア対応再生専用デイスク、その記録方法及び再生装置 |
JPH04362575A (ja) * | 1991-06-07 | 1992-12-15 | Sony Corp | 光ディスク媒体のグレーコードの形成方法及びトラックアドレス再生装置 |
JPH06195878A (ja) * | 1991-06-14 | 1994-07-15 | Sony Corp | 光ディスク記録再生装置 |
JPH05314664A (ja) * | 1991-07-09 | 1993-11-26 | Hitachi Ltd | 情報記録媒体、情報記録再生方法並びに情報記録再生装置 |
JPH05135507A (ja) * | 1991-11-08 | 1993-06-01 | Sony Corp | 光デイスク及びその記録再生方式 |
JPH05144194A (ja) * | 1991-11-15 | 1993-06-11 | Sony Corp | 光磁気デイスクの再生方式 |
JPH0628776A (ja) * | 1992-07-08 | 1994-02-04 | Sony Corp | 光学式記録再生装置の同期方法およびその光学式記録媒体 |
JPH06150569A (ja) * | 1992-10-30 | 1994-05-31 | Ricoh Co Ltd | 光ディスク装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0726572A4 * |
Also Published As
Publication number | Publication date |
---|---|
CN1106640C (zh) | 2003-04-23 |
US5978350A (en) | 1999-11-02 |
CN1136359A (zh) | 1996-11-20 |
AU3264995A (en) | 1996-03-14 |
CN1419233A (zh) | 2003-05-21 |
EP0726572A1 (en) | 1996-08-14 |
EP1008985A2 (en) | 2000-06-14 |
US6282162B1 (en) | 2001-08-28 |
US6292451B1 (en) | 2001-09-18 |
EP0726572B1 (en) | 2002-10-16 |
DE69528574T2 (de) | 2003-05-22 |
JP3383977B2 (ja) | 2003-03-10 |
DE69528574D1 (de) | 2002-11-21 |
CN1388531A (zh) | 2003-01-01 |
EP0726572A4 (en) | 1998-01-28 |
KR960706167A (ko) | 1996-11-08 |
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