WO1996025736A1 - Disque optique et dispositif d'enregistrement/de reproduction sur disque optique - Google Patents

Disque optique et dispositif d'enregistrement/de reproduction sur disque optique Download PDF

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Publication number
WO1996025736A1
WO1996025736A1 PCT/JP1996/000353 JP9600353W WO9625736A1 WO 1996025736 A1 WO1996025736 A1 WO 1996025736A1 JP 9600353 W JP9600353 W JP 9600353W WO 9625736 A1 WO9625736 A1 WO 9625736A1
Authority
WO
WIPO (PCT)
Prior art keywords
track
address
signal
reproducing
recording
Prior art date
Application number
PCT/JP1996/000353
Other languages
English (en)
Japanese (ja)
Inventor
Takahiro Nagai
Isao Satoh
Yuji Takagi
Yuji Hisakado
Yoshito Aoki
Shunji Ohara
Takashi Ishida
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to MXPA96004888A priority Critical patent/MXPA96004888A/es
Priority to KR1019960705811A priority patent/KR100251018B1/ko
Priority to EP96902467A priority patent/EP0757343B1/fr
Priority to DE69608370T priority patent/DE69608370T2/de
Publication of WO1996025736A1 publication Critical patent/WO1996025736A1/fr
Priority to HK98114590A priority patent/HK1016819A1/xx

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00718—Groove and land recording, i.e. user data recorded both in the grooves and on the lands
    • 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
    • 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
    • G11B7/0904—Dithered tracking systems
    • 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

Definitions

  • the present invention relates to an optical disc and an optical disc recording and reproducing apparatus. More specifically, the present invention relates to an optical disc in which an information pit row of a sector address is hopped and arranged between a land track and a groove track, and an optical disc recording / reproducing apparatus using the optical disc.
  • Optical discs have excellent interchangeability and random access properties, and their use in personal computers and various other information equipments is becoming increasingly widespread. Accordingingly, demands for increasing the storage capacity of optical discs are increasing. Is growing. A harmful optical disk requires sector-by-sector management for data recording and reproduction.Therefore, when manufacturing a disk, a groove for tracking control is formed, and sector address information is formed as pits. Often done. In the current write-type optical disk, a 6-m uneven groove track (each about 50 mm in width) is formed in a spiral shape on a disk-shaped substrate, and the groove track is recorded on the track surface.
  • Thin films composed of materials are formed by sputtering or other methods.
  • the disk substrate is copied in large quantities as a substrate made of polycarbonate or the like by using a stamper created based on an original obtained by cutting bits such as concave grooves and sector addresses by irradiating a light beam.
  • the optical disc having the above structure is irradiated with a light beam at a predetermined recording power to either the concave track or the convex track, and information is recorded by forming a mark on the record.
  • information is reproduced by irradiating one of the concave track and the convex track with a predetermined reproducing power with a light beam and detecting reflected light from the recording.
  • the recording density can be increased by reducing the width of each track (hereinafter referred to as the track pitch).
  • the track pitch can be increased. It is necessary to make the track pitch 1/2 of the pitch, but half of the track bite concave and convex tracks are created with a stable width, stun, ⁇ , and the disk is duplicated from the manufacturing method Very difficult.
  • FIG. 38 is a diagram of a conventional optical disk having a sector structure.
  • reference numeral 200 denotes a disk
  • 201 denotes a track
  • 202 denotes a sector
  • 203 denotes a sector address area
  • 204 denotes a data area.
  • FIG. 39 is an enlarged view of a sector address area and is a schematic view of a conventional intermediate address.
  • reference numeral 206 denotes an address pit
  • reference numeral 207 denotes a recording mark
  • reference numeral 208 denotes a groove track
  • reference numeral 209 denotes a land track
  • reference numeral 210 denotes a light spot.
  • each address pit 206 is arranged so that its center is shifted by ⁇ ⁇ ⁇ / 2 from the center of the groove track 208 in the radial direction of the disk.
  • FIG. 40 is a block diagram of a conventional tracking control and a signal processing for reading a signal on an optical disk.
  • Reference numeral 200 denotes a disk
  • reference numeral 201 denotes a track
  • reference numeral 210 denotes a light spot
  • reference numeral 211 denotes a disk motor for rotating the disk 200.
  • Reference numeral 212 denotes an optical head for optically reproducing the signal on the disk 200, a semiconductor laser 213, a collimating lens 214, an objective lens 2115, and a half 161 It consists of a mirror, 217 light-receiving parts, and 218 actuators.
  • Reference numeral 220 denotes a tracking error signal detection unit that detects a tracking error signal indicating an amount of shift S in the ⁇ direction between the light spot 210 and the track 201, and includes a differential circuit of 222 and a tracking error signal of 222. It is composed of LPF ( ⁇ -pass' filter).
  • Reference numeral 2 23 denotes a compensator for generating a drive signal for driving the optical head from the tracking error signal, and reference numeral 2 2 4 denotes an actuator 2 1 8 in the optical head 2 1 2 based on the auxiliary signal. This is a head drive unit.
  • 2 25 is a circuit for adding the signal from the light receiving section 2 17, 2 26 is a waveform equivalent section for preventing inter-symbol interference of the reproduced signal, and 2 27 is a data slice for binarizing the reproduced signal at a predetermined slice level.
  • 228 is binarized PLL PLL (Phase Locked Loop) that generates the word synchronized with the symbol
  • 229 is the AM detector that detects AM (Address Mark)
  • 230 is the playback
  • a demodulator that demodulates the signal, 231, a switch that separates the inverted signal into data and an address
  • 232 a CRC (Cyclic Redundancy Check) discriminator that discriminates the error of the address signal
  • 233 Is a bit correction unit that corrects the data signal.
  • Reference numeral 234 denotes an address reproduction unit composed of 225 to 232.
  • C R C is a beach detection code generated from the address number and the ID number.
  • the position g control of the focus direction (focus direction) of the light spot 210 is performed, but the description of the general focus control is omitted.
  • the tracking control operation will be described below.
  • the laser beam emitted from the semiconductor laser 21 3 is collimated by the collimator lens 214 and condensed on the disk 200 via the objective lens 2 15.
  • the laser beam reflected by disk 200 is half
  • the light amount distribution determined by the relative position S between the light spot 2 10 on the disk and the track 201 is detected as a compress signal.
  • the difference between the 2 17a and 2 17b of the light receiving section is detected by the differential circuit 2 21 and the differential signal is detected.
  • the differential circuit 2 21 By extracting the low band with LPF 222, a tracking error sign is detected.
  • the tracking error signal is used so that the tracking error signal becomes 0 (the light amount distribution of the light receiving sections 2117a and 2177b is equal).
  • 3 generates a drive signal, moves the actuator 218 by the head drive unit 224 according to the drive signal, and controls the position S of the objective lens 215.
  • the light spot 210 follows the track 201, the light is interfered by the light at the recording mark 207 and the address bit 206 of the track.
  • the output of the light receiving unit 2 17 becomes high because the amount of reflected light increases in the portion without pits.
  • the total amount of light output from the light-receiving unit corresponding to the mark 207 and the address pit 206 is obtained by the adder circuit 225, passed through the waveform equalizer 226, and passed to the predetermined slice level in the data slicer 227. Is converted to a signal sequence of “0” and “1”. Data and a read clock are extracted from the binarized signal by PLL228.
  • the reinstatement device 230 demodulates the data recorded in the transformed IB and converts it into a data format that can be processed externally. If this data is a signal in the data area, the error correction section 233 corrects the data error to obtain a data signal.
  • the AM detector 229 detects the AM signal for distinguishing the address portion from the signal train constantly output from the PLL 228, the switch 231 is switched.
  • the demodulated data is processed as an address signal.
  • the CRC discriminator 2 32 determines whether there is an error in the read address signal, and if not, outputs it as address data.
  • Fig. 41 shows the playback cycle (RF #) and the tracking error signal (TE signal) when passing through the sector address area 203 through the light spot 210 in the above configuration.
  • the light spot 210 is located at the center of the track, or immediately after entering the sector address area 203, the light spot 210 and the address pit 206 have a sudden displacement.
  • the TE signal fluctuates greatly I do.
  • the light spot 210 cannot suddenly follow the address pit 206, but gradually approaches the address pit 206 like a breach.
  • the sector address area 203 is short, the light spot 210 or the data area 205, which is a groove, before completely following the address pits 206, is to be removed from the off-track Xadr state. Tracking control is performed.
  • the RF signal amplitude Aadr changes depending on the distance between the light spot 210 and the address pit 206. That is, Aadr becomes smaller as the distance concept moves away, and Aadr becomes larger as the distance approaches.
  • the distance between the light spot and the address pit also becomes g in the sector address area.
  • the amplitude of the reproduced signal in the address pit area will be larger, but if the optical spot is closer to the address pit, the address pit area will be larger. In some cases, the amplitude of the reproduced signal in the memory becomes smaller, and the address reading becomes worse.
  • the S-shape of the address pits in the sector address portion it is possible to reduce the read error of the address signal due to the track shift and to reduce the track shift after passing the sector address.
  • the objective is to provide an optical disk that can reduce the number of tracks, and that enables the separation of tracks between lands and groups, and an optical disk recording / reproducing device S using the optical disk.
  • An optical disc according to the present invention is an optical disc having a spiral first track and a spiral second track that are adjacent to each other, and on which information is recorded or reproduced on the first and second tracks, A first address block formed so as to extend over both the first track and the second track which is adjacent to the first track of the nucleus at an outer periphery of the first track; and And a second address block formed so as to straddle both the second track and the second track that makes K contact on the outer peripheral side of the first track.
  • a land group recording / reproducing optical disk having a plurality of sectors having a sector address area and a data area, wherein the nuclear sector address area has a plurality of address blocks, At least two address blocks of the plurality of address blocks that are W-contacted in the circumferential direction are formed at positions shifted to the opposite side with respect to the center of the track, and the plurality of address blocks are formed.
  • Each has a portion indicating an address number for identifying the other sector, and a portion indicating an ID number for identifying the ffi number of address blocks in the sector address area.
  • the at least two adjacent address blocks are formed at a position S shifted from the center of the track to the inner side or the outer side by about half of the track pitch along the radial direction.
  • the portion indicating the address number has a data pattern common to the plurality of address blocks within the same sector address area.
  • each of the II-number address blocks has non-bit data at the beginning and the end.
  • the length of the non-bit data is longer than a disk rotation accuracy in a laser cutting process for manufacturing a disk master.
  • a first address block is longer than a reproduced clock synchronization signal section included in another address block and includes a reproduced clock synchronization section.
  • the sector address area has a block composed of information irrelevant to the identification of the address number, and the block is located on the outer circumferential side or the outer circumferential side from the track center. It is formed at a position shifted by about half of the track pitch along the radial direction. In one embodiment, a gap is formed along the circumferential direction between the at least two K-contact address blocks. In one embodiment, in the sector address area, the address blocks are arranged in the circumferential direction so that the phases of the arrangement S of the pits constituting the address blocks on both sides of one track match.
  • An optical disk SS / Z reproducing apparatus is an optical disk recording / reproducing apparatus for a land / groove recording / reproducing type optical disk having a plurality of sectors having a sector address area and a data area.
  • the sector address area has a plurality of address blocks, and at least two address blocks adjacent in the circumferential direction among the plurality of address blocks are shifted to the S ⁇ side with respect to the track center.
  • Each of the tt number of address blocks includes a portion indicating an address number for identifying the plurality of sectors and a number of address blocks in the sector address area for identifying the number of addresses.
  • the recording / reproducing apparatus irradiates the optical disk with a light beam and reflects the light from the optical disk.
  • An optical head for receiving light and outputting a reproduction signal;
  • An address signal reproducing unit for reading out the address number and the ID number when reproducing the address.
  • the apparatus further includes an address correction unit that corrects the address number read for each address block in accordance with the I ′D number using a common notation indicating whether the data is land reproduction or group reproduction.
  • a memory for writing the address number read by the address signal reproducing unit in association with the ID number continued by the address signal reproducing unit;
  • a comparator for comparing two or more address numbers respectively associated with the above ID numbers with each other and detecting whether or not the two or more address numbers match, and reproducing based on the output of the comparison S.
  • a tracking error signal detection unit that detects a tracking error signal indicating a shift amount between a track and an optical spot, and a timing generator that generates a gate pulse signal synchronized with each address block in the sector address area.
  • An inner-peripheral value sample-and-hold unit that samples and holds the level of the tracking error signal with respect to the address block; a differential circuit that calculates the difference between the outer-peripheral value sample.
  • a gain calculator for converting an output of the differential circuit into a signal having a predetermined level; Using the output from section comprises further a tracking O offset correction circuit for performing a tracking correction.
  • a reflection ⁇ S ⁇ detection unit for detecting an amount of reflected light from the optical disc, a timing generation unit for generating a gate pulse signal synchronized with each address block of the sector address, and the gate pulse Sample and hold the reflected light amount signal level for the address block arranged on the outer circumference in synchronization with the signal.
  • Still another optical disc according to the present invention has a first track in the form of a spiral, a spiral, and a second track in a spiral shape, and information is recorded on the first and second tracks.
  • the address area is arranged according to a CAV format or a ZCAV (ZCLV) format.
  • Still another optical disc according to the present invention has a spiral first track and a spiral second track, and information is recorded or reproduced on the first and second tracks.
  • An optical disk formed so as to straddle both the first track and the second track, and the optical disk being in contact with the first track on the inner peripheral side of the first track.
  • a first track identification mark that extends over both of the second tracks; and a second track that extends over both the first track and the second track that is in W contact with the outer periphery of the first track.
  • An address area having a track identification mark, wherein the first track identification mark and the second track identification mark are provided.
  • Still another optical disk according to the present invention has a spiral first track and a spiral second track that are in contact with each other, and information is recorded or reproduced on the first and second tracks.
  • An optical disc comprising: an address block formed so as to extend over both the first track and the second track; and controlling one of the first track and the second track.
  • An address area having a track identification mark provided in the information area is provided.
  • the optical disk recording / reproducing device fi is an optical disk recording / reproducing device capable of reproducing information from the optical disk of the present invention, and is a track designation for selecting a first track or a second track for recording or reproducing information. Means, and track identification mark reproducing means for protruding a track separation mark.
  • the track identification mark reproducing means reads a track identification mark of a track being reproduced, and determines whether or not the track identification mark is present. In response to this, a track separation signal is output by separating the track being reproduced from the first track or the second track, and the track designating means responds to the track identification signal. Then, the selection of the first track and the second track is switched.
  • the optical disc recording / reproducing apparatus is an optical disc recording / reproducing apparatus e capable of recording and reproducing information from the optical disc of the present invention, wherein the information is recorded on or reproduced from the first track or the second track.
  • the track being reproduced is any one of the first track and the second track based on the address reproduction means and the first and second address blocks reproduced by the address reproduction means.
  • Track identification means for identifying whether the track being reproduced is the second track due to the difference between the two addresses reproduced by the address reproduction means. Recognize one track and the second track and generate a track separation signal And the track designation means switches between the first track and the second track based on the track separation signal.
  • An optical disk recording / reproducing apparatus is an optical disk recording / reproducing apparatus fi capable of recording / reproducing information from / to the optical disk of the present invention, wherein a track designation for selecting the first or second track for recording or reproducing information Means, sr track identification mark reproducing means for reading a track identification mark extending over both the first track and the second track adjacent to the first track, and reproduction by the track identification mark reproducing means. Based on the two different tracks as the different marks, a track for determining whether the track being reproduced is the sr first track or the second track »another means,
  • the track ⁇ another means is that the track being reproduced is the first track or the second track due to the difference between the two track marks reproduced by the ⁇ track identification mark reproducing means.
  • An optical disc recording / reproducing apparatus characterized in that a track identification signal is output by discriminating whether there is a track or not, and the track designating means switches between the first track and the second track based on the track identification signal. .
  • An optical disk recording / reproducing apparatus capable of recording / reproducing information from / to an optical disk according to the present invention, comprising: a track designating means for selecting the first track or the second track for reproducing or reproducing information; Data reproducing means for reading the track cutting mark provided in the area; track polarity determining means for determining the polarity of the reproduced track; and track selecting means for correcting the track selection signal of the track specifying means.
  • the method of identifying a track on the optical disc comprises: reading a plurality of address blocks provided in one address area; detecting a match or mismatch of at least two address blocks; Identify whether the track being played is the first track or the second track.
  • the present invention by providing a sector address in which an address block which is wobbled in the radial direction with respect to the center of each track is provided by the above-described configuration, it is possible to reduce a defective removal of a preamble of a track due to a track shift, and Track displacement after passing through a dress can be reduced.
  • FIG. 1 is a schematic diagram of a first embodiment of the optical disc according to the present invention.
  • FIG. 2 is a layout diagram of address blocks in the first embodiment of the optical disc according to the present invention.
  • FIG. 3 is a block diagram of an embodiment of an optical disk recording / reproducing apparatus t according to the present invention.
  • FIG. 4 is a configuration diagram of a track identification circuit used in the optical disc recording / reproducing apparatus S according to the present invention.
  • FIG. 5 is a schematic diagram of a second embodiment of the optical disc according to the present invention.
  • FIG. 6 is a diagram for explaining the format of the sector address in the second embodiment of the optical disc according to the present invention.
  • FIG. 7A is a diagram showing a configuration of a sector address area.
  • FIG. 7B is a diagram for explaining the RF signal and the TE signal in the sector address area.
  • FIG. 8A and FIG. 8B are diagrams for explaining the track deviation of the optical spot and the RF symbol.
  • FIGS. 9A and 9B are arrangement diagrams of address blocks in another embodiment of the optical disc according to the present invention.
  • FIGS. 10A and 10B are diagrams showing the arrangement of address sprockets in another embodiment of the optical disc according to the present invention.
  • FIG. 11 is an arrangement diagram of address blocks in still another embodiment of the optical disk according to the present invention.
  • FIG. 12 is an S block diagram of an address block in still another embodiment of the optical disc according to the present invention.
  • FIG. 13 is a block diagram of an embodiment of an optical disk IS recording / reproducing apparatus according to the present invention.
  • FIG. 14 is an arrangement diagram of an address block in still another embodiment of the optical disc according to the present invention.
  • FIG. 15 is a diagram illustrating the operation of the address correction unit.
  • FIG. 16 is a block diagram of another embodiment of the optical disk recording / reproducing apparatus fi according to the present invention.
  • FIG. 17A is a block diagram of a land / groove cut section.
  • FIG. 17B is a block diagram of another land and groove section.
  • FIG. 18 is a block diagram of another example of the optical disk recording / reproducing apparatus according to the present invention.
  • FIG. 19 is a diagram showing changes in the TE signal with respect to off-track.
  • FIG. 20 is a timing chart of the timing generator.
  • FIG. 21 is a block diagram of another embodiment of the optical disc recording / reproducing apparatus fi according to the present invention.
  • FIG. 22 is a diagram showing a change in the AS signal with respect to off-track.
  • FIG. 23 is a perspective view of another embodiment of the optical disk according to the present invention. It is a drawing of a ku.
  • FIG. 24A is a diagram showing two address blocks to be formed.
  • FIG. 24B is a diagram showing two address blocks that are actually formed.
  • FIG. 25A is a diagram showing a case in which one bit data overlaps the other address block in two address blocks that are instantaneously connected.
  • FIG. 25B is a diagram showing a case in which one pit data does not overlap with the other address block in two address blocks that are momentarily connected.
  • FIG. 26A is a layout diagram of an address block in still another embodiment of the optical disk according to the present invention
  • FIG. 26B is a data layout diagram in the address block.
  • FIG. 27 is a layout diagram of an address block in still another embodiment of the optical disk according to the present invention.
  • FIG. 28 is a block diagram of still another embodiment of the optical disc recording / reproducing apparatus S according to the present invention.
  • FIG. 29 is a configuration diagram of the track identification mark reproducing circuit.
  • FIG. 30 is a layout diagram of an address block in still another embodiment of the optical disc according to the present invention.
  • FIG. 31 is a block diagram of still another embodiment of the optical disc recording / reproducing apparatus S according to the present invention.
  • FIG. 32 is a configuration diagram of a track identification mark reproduction circuit used in the optical disk recording / reproducing apparatus of the present invention.
  • FIG. 33 is a diagram showing a track identification circuit used in the optical disk recording / reproducing apparatus of the present invention.
  • FIG. 34 is a layout diagram of an address block in still another embodiment of the optical disc according to the present invention.
  • FIG. 35 is a block diagram of still another embodiment of the optical disk recording / reproducing apparatus according to the present invention.
  • FIG. 36 is a configuration diagram of a track polarity determination circuit used in the optical disk recording / reproducing apparatus S of the present invention.
  • FIG. 37 is a configuration diagram of a track selection signal correction circuit used in the optical disk recording Z playback device fi of the present invention.
  • FIG. 38 is a track configuration diagram of a conventional optical disc.
  • FIG. 39 is a schematic diagram of a sector address in a conventional optical disc.
  • FIG. 40 is a block diagram of a conventional optical disk recording / reproducing device.
  • FIG. 41 is a diagram for explaining the RF signal and the TE signal in the conventional example.
  • FIG. 1 is an external view of a first embodiment of an optical disc 401 according to the present invention.
  • the optical disk 401 is provided with two spiral tracks 404, a convex track 402 (land track) and a concave track 400 (groove track).
  • the optical disc 401 includes a substrate and various films (not shown) formed on the substrate. These stomachs include a well-known recording film for reflecting information, a reflection film, an S film, and the like.
  • the optical disk 401 may be a type of optical disk in which two substrates each having an information recording surface are bonded. This is also applicable to the optical disk of each of the following embodiments.
  • FIG. 2 shows the address area 405 of the optical disc 401 in more detail.
  • each of the tracks 400a, 402a, 400b, and 402b has an address area 405 indicating the address of each track (or sector). Is assigned.
  • the address area 405 to indicate the address of the groove track 403a Is provided with a pair of address blocks 411a and 80la composed of mutually identical bit strings.
  • a pair of address pits 411b and 801b consisting of the same pit row are provided, and to show the address of the groove track 403c, the same pit row is used.
  • a pair of address blocks 411c and 801c are provided. The content of the information indicated by the pit pattern (pit row) of the address block differs for each track (or sector).
  • the pair of address blocks 411 b and 801 b are respectively arranged at positions shifted to opposite sides with respect to the track center 408 of the groove track 403 b.
  • the amount of the shift is about half of the track pitch ⁇ .
  • the track pitch ⁇ is set within a range of about 0.3 to 1.6.
  • the address block 411b extends over both the group track 403b and the land track 402b around a boundary line 409 between the group track 403b and the land track 402b that makes an instantaneous contact on the outer peripheral side of the group track 403b. Is formed. Also, the address block 801b extends over both the groove track 403b and the land track 402a around the boundary 407 between the groove track 403b and the land track 402a that makes a K contact on the inner peripheral side of the group track 403b. Is formed.
  • the two address blocks 411b and 801b are formed so as to be shifted from the center 408 of the groove track 403b by about 1 ⁇ 2 ⁇ ⁇ ⁇ in the outer and inner circumferential directions, respectively.
  • the groove track, the land track and the address blocks 411b and 801b have the same width.
  • two address blocks 411b and 801b formed in one address area 405 on the groove track 403b contain the same address information.
  • the two address blocks are provided at successive positions S along the track direction (circumferential direction of the optical disc) so as to be played back continuously in time.
  • two address blocks are formed in all other address areas not shown.
  • the track 403 b in the left part of FIG. The laser beam spot moving along and along the center 408 passes over both the address blocks 4111b and 801b in the address area 405, and then the right part of FIG. Of the track 4 0 3 b on the track center 4 0 8.
  • the address area 405 of the optical disc shown in FIG. 2 is CAV or ZCAV (Z
  • Two address blocks 411b and 8101c corresponding to 3c are formed.
  • the data area 406 is identified by the first address blocks 411 a and 411 b having data to be reproduced first in the address area.
  • the data of the group track 403b information of two address blocks (411b and 801b) having the same value in the address area 405 is reproduced.
  • the data of the land track 402b is reproduced, information of two different address blocks (411b and 801c) in the address area 405 is reproduced.
  • the first address block is located on the boundary line 409 between the land track 400 b adjacent to the outer periphery of the groove track 400 b and the groove track 400 b
  • the second address block is a group track 4 0 on the boundary 4 0 7 between the land track 4 0 2 b and the adjacent land track 4 0 2 a on the inner peripheral side of the groove track 4 0 3 b and the groove track 4 0 3 b.
  • FIG. 3 is a schematic diagram of an optical disk recording / reproducing apparatus according to the present invention.
  • the invention will be described mainly with respect to reproduction of information recorded on an optical disk, or it is needless to say that the present invention is applicable to recording information on an optical disk.
  • the optical disk recording / reproducing device SJ includes not only a recording / reproducing device having a recording function but also a reproduction-only device and a recording-only device.
  • the “optical disk recording / reproducing device” is used as including an “optical disk recording / reproducing device” in a gouge sense and both “optical disk recording device” and “optical disk reproducing device s”.
  • the optical disk recording / reproducing apparatus of this embodiment is suitable for recording or reproducing information on the optical disk 401 shown in FIG.
  • the track determining means is described as CPU 601
  • the address reproducing means is described as an address reproducing circuit 603
  • the track starving means is described as a track separating circuit 901.
  • an optical disk 401 is attached to a motor 611 and rotated.
  • the optical head 610 focuses a laser beam on the information recording surface of the optical disk 401.
  • the head amplifier circuit 606 converts the intensity of the light reflected by the information recording surface of the optical disk 401 into a low pressure, and amplifies the signal to a predetermined level.
  • the binarization circuit 605 converts the reproduced analog signal into a digital signal.
  • the linear motor 609 is for moving the optical head 610 to the target track at a high speed, and its operation is controlled by the linear motor control circuit 607.
  • the data reproduction circuit 612 demodulates the signal digitized by the binarization circuit 605 while synchronizing with the clock, and transfers the obtained data.
  • the ID reproduction circuit 602 is composed of an address reproduction circuit 603 for reproducing an address (address information) from a common signal digitized by the binarization circuit 605, a land track 402 to a groove track 400.
  • a register 902 is used to combine the track weave signal b obtained from 01 into one address a.
  • the focus tracking control circuit 608 performs focus control for maintaining the focus of the laser light on the information recording green surface and tracking control for maintaining the focus of the laser light at the center of the track on the disk.
  • the CPU 601 moves the optical head 610 to the vicinity of the target track using the linear motor control circuit 607, and further uses the tracking control circuit 608 to perform a track jump.
  • the CPU 601 moves the optical head 610 to the vicinity of the target track using the linear motor control circuit 607, and further uses the tracking control circuit 608 to perform a track jump.
  • the CPU 601 moves the optical head 610 to the vicinity of the target track using the linear motor control circuit 607, and further uses the tracking control circuit 608 to perform a track jump.
  • To move to the target track and select the land track or groove track by specifying the tracking polarity.
  • FIG. 4 is a configuration diagram of a track view distinction circuit 91 that generates a track identification signal b from two addresses e reproduced from the optical disc 401 of FIG. 1001 is a register that holds the first address, 1002 is a register that holds the second address, 1003 is a comparator that compares two addresses, and 1004 is a comparison result. This is a flip-flop that holds
  • the CPU 601 When given the logical address of the track on which data is to be recorded or reproduced, the CPU 601 issues a seek command to the linear motor control circuit 607, drives the linear motor 609, and drives the optical head near the target track. Move 6 1 0. Next, the CPU 601 outputs to the focus track control circuit 608 a track jump command or a track selection command according to whether the track force is less than a land track or a groove track, and thereby outputs the optical head 61. 0 reaches the destination track. In the focus tracking control circuit 608, when a track S selection command is given, the polarity of the tracking control is switched to cause the optical head 610 to jump half a track, and focus and track a target track.
  • the reflected light from the optical disk 410 is converted into current by the multiple photodetectors of the optical head 610, and is converted into voltage by the head detector circuit 606 as a reproduction signal for each photodetector. Is performed. Various calculations are performed on the reproduction signal according to the purpose of use, and a reproduction convention, a tracking current difference signal, and a focus difference signal representing information are generated.
  • the tracking error signal and the focus error signal are supplied to the focus tracking control circuit 608, Used for focus tracking of the optical head 6 10.
  • the reproduction signal representing the information is digitized by the binarization circuit 605.
  • a logical address for distinguishing a data area includes an address block 411 1 (reproduced by the address reproducing circuit 603) and a land track common to the land track 402 and the group track 400.
  • Track identification circuit 9 0 1 compares with two registers 1 0 0 1 and 1 0 0 2 S 1 0 0 3 and flip-flop 1 0 0 4, delay element 1 0 0 5 1 0 0 6 1 0 0 7 It consists of:
  • the track discrimination circuit 901 is a gate pulse signal obtained by delaying the address detection signal d for a certain period of time, takes in two addresses e into registers 1001, 1002, and stores the two addresses e. The comparison is performed by the comparator 1003. That is, the address detection signal d is delayed for a certain time by the three delay elements 1005, 1006, and 1007, so that the register 1001, 1002, and the flip-flop 10 Converted to a gate pulse for 0 4.
  • This circuit generates a track identification signal b indicating a groove track when the two address blocks 41 1 and 81 match, and an identification signal indicating a land track when the two addresses are different. Generates signal b.
  • the register 902 in FIG. 3 holds the first address reproduced by the address reproduction circuit 603.
  • the data reproduction circuit 612 compares the address a reproduced by the ID reproduction circuit 602 with the address given from the CPU 601 and, if they match, reproduces the data after a fixed time from the address reproduction. I do.
  • the track search is performed again.
  • a half-track jump is performed, and The track selection signal for selecting the polarity of the switching is inverted.
  • the case where only the highest order of the address is different means that the land track and the dull track have the same address but the land track or the group track has only one choice. It is. To correct this state, the tracking polarity is switched by inverting the track reselection signal.
  • the laser beam scans the center 408 of the groove track almost and has the same value in one address area.
  • the information in the two address blocks (eg, 411b and 80.1b) is reproduced.
  • the laser beam scans almost the center of the land track 410, and two different address blocks (for example, 411b and 8001) within one address area.
  • the combination of the two addresses reproduced from the address area differs depending on whether the currently reproduced track is a land track or a groove track.
  • Tracks 402 and group tracks 400 can be classified by job. Therefore, regardless of the correspondence between the groove shape (groove track or land track) and tracking sensitivity, recording / reproduction on a desired track can be performed using only the reproduction signal.
  • the tracking polarity can be automatically switched from only the playback signal based on the difference between the two addresses. Regardless, common tracking is possible. Therefore, in the optical disk recorded on both the land track and the groove track, the: can be improved.
  • FIG. 5 shows a second embodiment of the optical disc according to the present invention.
  • a plurality of sectors 4 are arranged on a disk 1 in a continuous manner along a track 2.
  • Each sector 4 is composed of a sector address area 5 for indicating the position fi of the sector on the disk and a data area 6 for actually recording data.
  • FIG. 6 shows the logical format of the sector address employed by the optical disc 1 of the present embodiment. Show In the optical disc 1 of this embodiment, four address blocks 16 to 19 are provided for one sector address #. In FIG. 6, address blocks 16 to 19 are described as ID 1 to ID 4, respectively. Each address block includes a VFO 11, an AM (address mark) 12, a sector address number 13, a duplication order number (ID number) 14, and a CRC (Cyclic Redundancy Check) 15.
  • VFO 11 an AM (address mark) 12
  • ID number 13 a duplication order number
  • CRC Cyclic Redundancy Check
  • VFO 11 is a reproduction clock synchronization signal section having a continuous return data pattern for ensuring that an address signal can be reproduced from an address area even if there is a fluctuation in the rotation speed of the disk.
  • the recording / reproducing apparatus locks PLL (Phase Locked Loop) to this return data pattern and generates a clock for reading data.
  • AM I 2 is composed of a special code pattern for indicating the start position of address data.
  • the address number 13 is a data pattern indicating the position of the sector on the disk.
  • the ID number 14 indicates the order of each address block in the address area, and may be expressed as a “repetition number”.
  • C R C is a detection code generated from the address number and the ID number.
  • each address block may include additional information other than the information shown in FIG.
  • FIG. 7A shows a diagram of a layout of an address block in a sector address area of the optical disc of the present embodiment.
  • two address blocks are provided in each address area.
  • four address blocks are provided in each address area.
  • the number of address blocks provided in each address area is not limited to four.
  • FIG. 7A shows a land track 22 and adjacent groove tracks 21 and 23.
  • a sector address area 5 provided between the data areas 6 and 7, four address blocks ID1 to ID4 are arranged so as to alternately wobble with respect to the track center. More specifically, the track width (or track pitch) of one track can be either a land track or a groove track. If it is also Tp, the address block IDs 1 to ID4 are shifted from the center of the track by ⁇ 2 in the radial direction, and are alternately arranged on the inner and outer peripheral sides.
  • An address bit 25 is formed in each of the address blocks ID 1 to ID 4, and a recording mark 26 is formed in the data areas 6 and 7.
  • the width of the address bit 25 (the size in the disk radial direction is 0.1 to 0.6 im in this embodiment.
  • the green mark 26 in this embodiment is formed on the recording film.
  • the address pit 25 is formed when forming the group tracks 21 and 23.
  • the laser beam spot for the cut ink moves to the right in FIG. 7A while forming the groove track 21 of the data area 6.
  • the laser light spot moves to the right in FIG. 7A while forming address blocks 16, 17, 18, and 19 in this order in the sector address area 5.
  • laser light is continuously emitted so as to form a group track of a predetermined width, and in the sector address area 5, the laser beam is shifted by 12 Tp in the radial direction from the groove track. In this state, laser light is emitted discontinuously according to the address bits to be formed. Note that in FIG.
  • the address blocks ID 1 and ID 3 are located at a position S shifted upward in FIG. 7A from the address blocks ID 2 and ID 4, but the opposite is true.
  • the address block ID 1 and ID 3 may be provided at a position fi shifted downward from the address block ID 2 and ID 4 in the figure.
  • FIG. 7B shows waveforms of a reproduction signal (RF signal) and a tracking error signal (TE preamble) when the optical spot 24 reproduces the sector address area 5.
  • RF signal reproduction signal
  • TE preamble tracking error signal
  • the amplitude of the RF signal is approximately proportional to the area of the light spot 24 over the address pit 25. Therefore, when the light spot 24 is located at the center of the track, the address block ID 1, the ID3 section, and the address block ID 2
  • ID 4 the direction in which the light spot 24 irradiates the address pits 25 is different, and the irradiating area is almost the same, so that the RF signal is obtained with substantially the same amplitude as shown in FIG.
  • the TE signal is transmitted to the light spot 24 in the data areas 6 and 7 consisting of grooves.
  • a value proportional to the amount of misalignment with the rack groove can be obtained, but a value proportional to the amount of misalignment between the light spot 24 and the address pit 25 also appears in the sector address area 5 composed of bits.
  • the output of the TE signal differs for the same displacement). Therefore, as shown in FIG. 7B, TE signals having different polarities are obtained depending on the arrangement S fi of the address block.
  • FIGS. 8A and 8B are diagrams showing the state of the RF signal in the sector address area when the light spot is off-track.
  • 8A shows the RF signal in the sector address area 5 when the light spot 24 is shifted to the inner track side of the track
  • FIG. 8B shows the RF signal when the light spot 24 is shifted to the outer track side of the track. Shows the RF signal.
  • the RF signal amplitude increases because the light spot 24 passes near the address blocks 16 and 18 in the ID1 and ID3 sections, and the light spot 24 passes from the address blocks 17 and 19 in the ID2 and ID4 sections.
  • the RF signal becomes smaller because it passes away. As a result, the address signal is difficult to be shot at ID2 and ID4.
  • At least one address block can be normally detected in one sector address.
  • ID1 and ID3 have large RF signal amplitudes, and the address can be easily picked up. Therefore, reading can be performed as a sector address.
  • FIG. 8B similarly, the RF signal amplitude is reduced in ID1 and ID3, and the address picking-up is deteriorated. Get better. That is, regardless of whether the optical spot is displaced from the center of the track to the inner peripheral side or the outer peripheral side, the capability of removing the address in the sector address portion does not decrease.
  • the TE signal generates a level shift that alternately shifts positively and negatively for each address block.
  • the frequency of the level fluctuation of the TE signal is 20 kHz or more, which is much higher than the control area where the light spot follows the target track. Therefore, the light spot does not react to the level shift of the TE signal.
  • level fluctuation Since the average value of is approximately 0, the deviation of the light spot due to the DC component does not easily occur. Accordingly, the sector address area gives the tracking control unit less influence, and disturbance of tracking control immediately after passing through the sector address area can be reduced.
  • FIG. 9A and 9B show the distribution fi of information blocks in the sector address area in the present embodiment.
  • the sector address area 5 is provided with additional information blocks 107, 108, and 109 including additional information that is not address number information.
  • Others have the same configuration as the configuration shown in FIG. 7A.
  • # 100 and # 101 indicate track address numbers.
  • Each address block 16 to 19 contains address information for identifying an address number and an ID number. As in the case of the pad blocks 16 to 19, it is preferable to displace them from the center of the track in the radial direction at a field of approximately Tp / 2. If the additional information block is shorter than the address block, or if it is not possible to divide the additional information into two, as shown in Fig. 9 ⁇ , the track is on the outer or outer periphery of the track. The additional information block 107 is allocated to one of the two sides. On the other hand, if the additional information block is relatively long *, the additional information is divided into identifiable block units 108 and 109 as shown in Fig. 9 ⁇ , and the inner circumference of the track is divided. It is sufficient to arrange them alternately on the side and the outer side.
  • the additional information is arranged at the end of the sector address area (right side in the figure), but may be arranged at another position.
  • FIGS. 1OA and 10B show the arrangement of address blocks in the sector address area in this embodiment.
  • 110 and 112 are group tracks
  • 111 is a land track
  • 113, 114, 115, 116, 117, 118, 119 and 120 are address blocks
  • 24 is a light spot.
  • Tracks and pits are formed by irradiating the rotating laser beam S with the cutting laser beam.
  • the laser beam When the laser beam is rapidly irradiated, it becomes a single continuous groove, and this portion becomes a track (in this embodiment, a groove track), and the laser beam is emitted intermittently at 0 N / OFF for a specified time. This forms a pit.
  • the laser beam for cutting is moved in the radial direction by the track pitch in one rotation of the master disk while the irradiation of the laser beam is controlled in the grooves and the address bits, so that the entire circumference of the disk is controlled. Tracks and address pits are formed.
  • Tracks and address pits are formed in the same manner by using the address pits of the present invention.
  • the center of the cutting laser beam is arranged for each address block. Is shifted in the radial direction by T p / 2 to turn on / off the cutting laser light.
  • a laser beam for forming a track groove, a laser beam for forming an inner peripheral side address pit, and a laser light for forming an outer peripheral side address pit are set, and each laser light is turned on / off at a predetermined position.
  • a groove track 110 left side in the figure
  • address blocks 113, 114, 115, and 116 are formed in this order.
  • a groove track 112 and address books 117, 118, 119, and 120 are formed in this order.
  • circumferential positions of address blocks (for example, address blocks 113 and 117) including the same ID number do not always match.
  • FIG. 10A if the data is shifted by ⁇ , when the data of the land track 111 is reproduced, the end of the address block 117 and the beginning of the address block 114 overlap by ⁇ . It may not be detected correctly.
  • the interval Xm that is equal to or greater than the disk rotation speed at the time of cutting is set, for example, to a value in the range of 0 to 1.0 m.
  • the interval Xm may be changed according to the distance from the center of the disk.
  • FIG. 11 shows an arrangement diagram of address bits in a sector address area of the optical disk of the present embodiment.
  • 150 and 152 are groove tracks
  • 151 is a land track
  • 153, 154, 155 and 156 are address blocks
  • 1 ⁇ 7 to 164 are address bits forming an address block.
  • a group and an address pit are formed by a quick gun.
  • the pits of the address blocks 153 and 154 are formed in synchronization with the cutting reference clock.
  • the interval on the time axis is an integral multiple of the information read clock period Tw (for example, about 5 to 100 nanoseconds). That is, in addition to the pit interval T10 in the same address block, in principle, the pit interval T11 between different address blocks is also an integral multiple of Tw.
  • the rotational change during cutting In order to prevent overlapping of address blocks due to movement, the position of the address block for the next groove track 152 is shifted in the circumferential direction. Also in this case, when the land track 151 is reproduced by setting ⁇ to a free length, the time interval T 14 from the pit 163 of the address block 155 to the pit 160 of the address block 154 becomes equal to that at the time of cutting. Since it is not synchronized with the reference clock, it may not be an integral multiple of Tw.
  • time interval T14 does not become an integral multiple of Tw, it takes time for the VFO at the beginning of the address block 154 to re-examine the data in the PLL again and to adjust the phase of the ffl clock ⁇ lock.
  • »It is an integral multiple of 14 and the time required for the PLL to synchronize with the address block 154 of the 5 # data reproduction of the land track 15 1 can be shortened.
  • FIG. 12 shows an arrangement S of address blocks in a sector address area on the optical disc of this embodiment.
  • 130 and 132 are groove tracks
  • 131 is a land track
  • 133, 134, 135, 136, 137, 138, 139 and 140 are address blocks
  • 24 is a light spot.
  • 141 is VFO
  • 142 is 8
  • 143 is address number
  • 144 is ID number
  • 145 is ⁇ 145
  • 146x147 is dummy data area.
  • dummy data areas 146 and 147 containing data irrelevant to the division of the address signal are arranged at the beginning and end of each address block.
  • VF0141, AM 142, address number 143, ID number 144, and CRC 145 are as described in the second embodiment.
  • the provision of the dummy data areas 146 and 147 prevents the head of the address block from overlapping the end of the previous address block even if the circumferential position of the address block fluctuates.
  • the pit pattern of the dummy data is arbitrary. For example, the end of the address information area If the pit pattern arrangement is the same as the bit pattern of the VPO141 at the beginning, the VFO area becomes apparently longer, and there is an advantage that the generation of the clock for reading data is more accurate.
  • the length of each of the dummy data areas 146 and 147 should be such that the dummy data area does not overlap the necessary range for each address signal in the actual IS.
  • the dummy data area may be arranged only at the end of each address block.
  • FIG. 13 is a block diagram of an optical disk recording / reproducing apparatus S capable of reading a sector address of the optical disk shown in FIG. 7A.
  • 31 is a disk
  • 32 is a disk motor
  • 33 is an optical head
  • 34 is an address reproducing unit and an addition circuit.
  • Waveform Equivalent Unit 36 Data Slice Unit 37, PLL 38, Demodulator 39, AM Detector 40, Switch 41, CRC Discriminator 42. 4 3 is the narrow correction section
  • Reference numeral 4 denotes an addressless correction unit.
  • FIG. 14 shows the format of the sector address of an optical disk on which information is recorded / reproduced by the optical disk recording / reproducing apparatus.
  • This optical disk has the same configuration as the optical disk of FIG. 7A.
  • FIG. 14 shows a land track 52 and group tracks 51 and 53 adjacent thereto.
  • four address blocks 54 to 57 are arranged so as to alternately wobble with respect to the track center.
  • the groove track 51 is at address # 100
  • the land track 52 is at address # 101
  • the group track 53 is at address # 101.
  • the numerical values (# 100, etc.) in each address block represent the values (addresses) set for the address numbers 13 in the address book cock.
  • the optical head 33 irradiates the optical disk 31 with laser light, and detects the intensity of light reflected by the optical disk 31. Generates a reproduction signal (RF signal) from the amount of reflected light.
  • Waveform equivalent section 36, data slice section 37, PLL 38, demodulator 39, A The operation of extracting the address number and the ID number from the RF signal for each address block through the M detection unit 40, the switch 41, and the CRC judgment unit 42 is the same as the operation described in the conventional example.
  • the address signal obtained in the sector address area is a set of (address number, ID number), in order (# 100, 1), (# 100, 2). ), (# 100, 3), 100, 4), and this value is input to the address correction unit 44.
  • the address correction unit 44 detects an address based on the input address number and ID number.
  • FIG. 15 shows a set of symbols input to the address correction unit 44 at the time of data reproduction of a single track and data of a land track.
  • the address blocks 54, 55, 56 and 57 containing the same address number are arranged on the inner and outer circumferences with respect to the center of the groove track 51, so that they can be obtained when the data of the groove track 51 is reproduced.
  • the address numbers of ID1 to ID4 are all the same (here, # 100). Therefore, the address correction unit 44 may output the read address number (# 100) as it is as the final address value.
  • the address signals obtained in the sector address area are (# 101, 1), (# 100, 2), (# 101, 3), ( Input to the address correction unit 44 in the order of ⁇ ? 100, 4). Since it is known from the arrangement of the address blocks shown in FIG. 14 that the address numbers indicated by ID1 and ID3 are smaller than the actual address numbers by 1, the address correction unit 44 determines that ID2 and I2 Add 1 to address number # 100 read from D4 to obtain address number # 101. The address number # 101 read out by ID1 and ID3 is used as it is because it matches the actual address value. Then, the final address value # 101 is output.
  • the above-mentioned address correction can be achieved if a preamble (L / G signal) indicating whether the data is to be reproduced during group reproduction or land reproduction is input to the address correction unit 44.
  • the read address number (for example, # 1 0 0) is corrected based on the ID number (for example, 2) read almost at the same time, and an address correction unit 44 that can obtain the correct sector address value (for example, # 10 1) is provided. ing. As a result, it becomes possible to manage the sector address of an optical disk having the arrangement shown in FIGS. 7A, 7B, and 14.
  • the address numbers of the land track and the group track are the address numbers indicated by ID1.
  • ID1 and almost all of ID4 are found successfully. Therefore, when the value of ID1 is normally obtained, it is preferable to use that value as the track address as it is.
  • the track address of the land track 52 may be set to # 100, but it is more practical to set it to # 101 without correcting the address number read from ID1.
  • the 1D1 VFO is provided slightly longer than the other address blocks, thereby improving the readout accuracy of ID1, it is better for ID1 to show the track address number as it is for the read land. There is also the advantage that the readout accuracy in the group is equal.
  • the address correction unit obtains the address value in the land track and the groove track in the same way as described above by calculating the correction value by adding ⁇ to the ejected address value during the reproduction of the land track. Is possible.
  • a correction value may be calculated according to the correction.
  • the same address number is located on the inner and outer circumferences of one track, it is not necessarily one track. Even if the rack number is not ES, if the ID number and the beard pattern of the address block are known, it is possible to correct the read address number based on the ID number.
  • FIG. 16 is a block diagram of the optical disc recording / playback apparatus fi of the present embodiment.
  • 31 is a disk
  • 32 is a disk motor
  • 33 is an optical head
  • 34 is an address reproducing circuit
  • an addition circuit 35 is an addition circuit 35
  • a waveform equivalent section 36 is a data slice section 37, a PLL 38, a demultiplexer 39, and an AM detection section.
  • 40 a switch 41, and a CRC determination unit 42.
  • Reference numeral 43 denotes a gong correction unit
  • reference numeral 61 denotes a land group identification unit.
  • Figure 1A is a block diagram showing the configuration of the land group identification unit 61, 62 is Memory 1, 63 is Memory 2, 64 is Memory 3, 65 is Memory 4, 66 is Comparator 1, and 67 is the ratio.
  • Units 2 and 68 are comparators 3 and 69 are comparators 4 and 70 are judgment units.
  • the optical head 33 irradiates the disk 31 with a laser and detects a reproduction signal (RF signal) from the reflected light amount.
  • the address number and ID number are extracted from the RF signal through the waveform equivalent section 36, data slice section 37, PLL 38, demodulator 39, AM detection section 40, switch 41, and CRC determination section 42 for each address block. Is the same as the operation described in the conventional example.
  • the address if issued by scanning the sector address area 5 by the optical spot 24 is sequentially input to the land group job division 61 as a set of (address number, ID number).
  • the address numbers ejected to the memories 62, 63, 64, 65 corresponding to the input ID numbers are directly recorded. That is, the address number of ID number 1 is stored in memory 1 (62), and the address number of ID number 2 is stored in memory 2 (63).
  • # 1 00 is assigned to the memory 1
  • # 100 is assigned to the memory 2
  • # 100 is assigned to the memory 4
  • # 100 is assigned to the memory 4. Is stored.
  • Comparator 1 (66) in 7A stores memory 1 (6 By comparing 2) with the two address numbers in the memory 2 (63), it is determined whether the address numbers match or not, and the result is passed to the determination unit 70.
  • comparator 2 (67) compares memory 2 (63) with memory 3 (64)
  • comparator 3 (68) compares memory 3 (64) with memory 4 (65)
  • compares The device 4 (69) compares the memory 4 (65) with the memory 1 (62) and passes it to the judgment unit 70.
  • the determination unit 70 determines that the track currently being reproduced is a groove track when the outputs of the comparators all match.
  • the outputs of all of the comparisons Sl to 4 become “mismatch”.
  • the results of the comparisons ⁇ 1> to ⁇ 4> should all be "mismatch" from the pattern of the address block as shown in Fig.14. In this case, it is determined that the track currently being reproduced is a land track.
  • the address block arrangement pattern of the present embodiment at least one of the results of the comparator 1 (66), the comparison S2 (67), the comparison 3 (68), and the comparator 4 (69) is “match”. If so, the track currently being played is a group track, and if at least one of the tracks does not match, it can be determined to be a land track.
  • the determination unit 70 may output a signal (L / GOK signal) indicating that identification is impossible.
  • sector addresses are read out once every few milliseconds due to the rotation of the disk, so over a long period of time, land groups cannot be separated from all sector addresses. The probability of occurrence is extremely low, and the above operation makes it practically indispensable to distinguish between lands and groups.
  • the determination unit 70 may output No. 11 (L / GOK signal) indicating that weaving is impossible.
  • FIG. 18 is a block diagram of the device fi of the present embodiment.
  • reference numeral 31 denotes a disk
  • reference numeral 32 denotes a disk motor
  • reference numeral 33 denotes an optical head
  • reference numeral 34 denotes an address reproducing unit
  • reference numeral 81 denotes a tracking error signal detecting unit
  • a differential circuit 82 LPF (Low Pass). Filter) 8 3
  • Reference numeral 84 denotes a phase compensation unit
  • reference numeral 85 denotes a head drive unit.
  • 90 is an evening generating section
  • 91 is an outer value sample and hold section
  • 92 is an inner value sample and hold section
  • 93 is an addition circuit
  • 94 is a gain calculating section.
  • FIG. 19 is a schematic diagram showing a change in the tracking error signal (TE signal) in the off-track state in the sector address area 5.
  • the level of the TE signal changes substantially in proportion to the distance between the optical spot and the address bit, and the direction of the level change is determined by the position of the optical spot and the address bit. That's right.
  • the TE signal has a negative value when the light spot 24 passes through the outer peripheral side of the address pit 25 and has a positive value when the light spot 24 passes through the outer peripheral side of the address pit 25.
  • the level fluctuation VTE1, VTE3 of TEft In this case, in the case of ID2 and ID4, since the distance between the light spot 24 and the address bit 25 is far apart, the level changes VTE2 and VTE4 of the TE signal become large and become positive values.
  • the TE signal as shown in Fig.
  • FIG. 20 is a timing chart of the gate pulse No. (GT0 to GT2) generated by the timing generation section 90.
  • the timing generation unit 90 since Adoresu signal read is input from the Adoresu reproducing section 34, a gate pulse ⁇ GT 1 in synchronism with the outer peripheral side ⁇ address block on the basis of 1 Ru Adoresu signal is the input, the inner peripheral A gate pulse signal GT2 synchronized with the side address block is generated.
  • the gate pulse signal GT1 is a signal for sampling the signal of the outer value sample and hold unit
  • the gate pulse signal GT2 is a signal for sampling the signal of the inner value sample and hold unit.
  • FIG. 20A shows a case where ID1 can be read. If ID1 can be read, the timings at which ID2, IDS, and ID4 appear can be known. First, a signal GTO including a gate pulse synchronized with the end of ID1 is generated. In this case, the inner address block I D3 and the outer address block I D2 (I D2
  • the gate pulse signal GT2 is generated at a timing delayed by time T1 from 0, and the gate pulse signal GT2 is generated at a timing delayed by time KT2 from the gate pulse signal GT0.
  • (b) of FIG. 20 shows a timing chart in a case where ID 2 cannot be read and ID 2 can be shot. Generates a gate pulse signal GT0 synchronized with the end of ID2.
  • the timing generator 90 calculates the time T from the gate pulse signal G TO
  • the gate pulse signal GT1 is generated at the timing of 2 and the gate pulse signal GT2 is generated at the timing delayed by 1 hour.
  • FIG. 20 (c) shows a case where a gate pulse for sample hold is generated in synchronization with another gate pulse signal synchronized with the sector address area.
  • the timing generator 90 generates GT1 at a timing delayed from GT0 by B5T4, and the gate is driven by time T3 from GT0. To generate GT2.
  • the debt level VTE2 in the outer address block 102 is the gate pulse.
  • TE signal level in inner address block ID 3 VTE3 is recorded in inner sample and hold unit 92 in synchronization with gate pulse signal GT 2 .
  • the value of (VTE1 ⁇ VTE2) is output from the differential circuit 93. Since this value corresponds to the amount of off-track, the off-track signal (0FTR signal) can be obtained by further adjusting the level of the TE signal in the gain conversion unit 94.
  • the number of address blocks to be sampled and held was one for the inner peripheral address block and one for the outer peripheral address block, or the average value of multiple outer peripheral address blocks and the number of outer peripheral address blocks. If the off-track signal is detected using the average value, the average value can be detected even if there is local undulation of the track. (Example 1 o)
  • FIG. 21 is a block diagram of the device fi of the present embodiment.
  • 31 is a disk
  • 32 is a disk motor
  • 33 is an optical head
  • 34 is an address reproducing section
  • 81 is a tracking error signal detecting section
  • 84 is a phase compensating section
  • 85 is a head driving section.
  • 90 is a timing generator
  • 91 is an outer value sample and hold unit
  • 92 is an inner value sample and hold unit
  • 93 is a differential circuit
  • 94 is a gain conversion unit.
  • Reference numeral 100 denotes a reflected light signal detection unit, which includes an adding circuit 101 and an LPF (Low Pass Filter) 102.
  • LPF Low Pass Filter
  • the outputs of the two-divided photodetector of the optical head 33 are added by the adder circuit 101, and the added signal is LPF 102 (the band is higher than the tracking control band but lower than the RF signal. (About tens to several hundred Hz) to remove the high-frequency component and detect the AS signal as a signal representing the average reflection 3 ⁇ 4S.
  • FIG. 22 is a diagram showing a change in the AS signal with respect to the amount of deviation between the optical spot and the track.
  • the RF convention changes as shown in FIG. 7B, FIG. 8A, and SI8B depending on the position where the light spot 24 passes.
  • the AS signal indicates the average level of the RF signal
  • the signals (a), (b), and (c) in FIG. 22 correspond to the lines (a), (b), and (c) through which the optical slot 24 passes in FIG. AS conventions as shown in b) and (c) are obtained. Therefore, as in the ninth embodiment, if VAS1, VAS2, etc.
  • the generation of the gate pulse signals GT1 and GT2 to be sampled and held is performed by the timing generator 90 as described in the ninth embodiment.
  • the timing of generating the gate pulse signal is the same as that of the pit pattern in each address block. It is preferable to use the AS signal in the VF 0 section or the AM section, or a specially provided bit section, because it is possible to perform more accurate detection by sampling the AS signal.
  • the off-track signal (0FTR signal) detected using the AS signal can be used for offset correction of the tracking control system.
  • the arrangement of the address blocks in the sector address area ⁇ ⁇ ⁇ ⁇ in the optical disc of this embodiment is the same as that shown in FIG. 1OA.
  • the S-end pattern of each address block is prevented from becoming a bit, and A data array is adopted so that the head pattern of the next address block does not become a bit.
  • non-pit data (length ⁇ 1) that is longer than the rotation accuracy ( ⁇ ) when cutting the master disc is placed.
  • FIGS. 24 ⁇ , 24 ⁇ , 25 25 and 25 ⁇ show the advantages of the optical disk of this embodiment.
  • the last pattern of the address block is a bit
  • the first pattern of the next address block is also a pit.
  • FIG. 24 (b) shows the expected bit shape in design for such a data array.
  • the last bit of the address block 113 and the first bit of the address block 114 are formed so as to have a specified length along the center of each address block.
  • FIGS. 25A and 25B show a pit reading operation when the optical spot 24 scans so as to reproduce the data of the land track 11 1.
  • FIG. 25A shows a sector address area in the case where the pit arrangement at the connection between the address blocks is not particularly specified. In the sector address area of Fig. 25A, the adjacent address block 114 and address block 117 overlap in the circumferential direction by a length corresponding to the cutting accuracy ⁇ . The top of 4 is the pit data. In this case, as shown in FIG. 25A, when the leading pit data of the address block 114 overlaps with the non-pit data at the end of the address block 117, the light spot 24 is moved to the land track 1. If the data in address block 1 17 is reproduced while moving along the center line of 11, a data error will occur in address block 1 17. This is because it is determined from the pit data at the head of the address block 114 that the end of the address block 117 has pit data.
  • FIG. 25B shows a sector address area in the optical disc of this embodiment.
  • non-bit data is arranged at the head and holly edge of the address block.
  • the head of address block 1 14 is not pit data
  • the non-pit data of the last data of address block 1 17 and the non-pit data at the head of address block 1 14 overlap.
  • the playback signal Since the data is non-pit data no data flood occurs at address block 117.
  • the head of the address block is the VFO area, and it is not always necessary to read all the data. If the address data section is resynchronized in the area and the address number and CRC can be recognized correctly, no interrogation will occur in the read operation of the address block.
  • FIG. 26A is an arrangement diagram of an address block of the optical disk of the present embodiment, which is the same as that of the second embodiment, where 110 and 112 are groove tracks, 111 is a land track, 113, 114, 115, 116, 117 and 118. , 119 and 120 are address blocks, and 24 is a light spot.
  • FIG. 26B shows the arrangement of data in each address block.
  • the address block 117 of ID 1 is composed of VFO 1 (300), AM (301), address number (302), ID number (303), C C 1 (3
  • ID 2 address block 114 is composed of VFO 2 (305>, AM (306), address number (307), ID number (308),
  • optical disc of the present embodiment The difference between the optical disc of the present embodiment and the optical disc of Embodiment 2 is that
  • the length of VFO 1 of the address block 117 of 1D1 is 1.5 to 3 times longer than the VFO of the address block of ID2, ID3 and ID4.
  • the sector address area 5 is composed of the SS surface on which the address pits are formed, as shown in FIGS. 8A and 8B.
  • the DC signal component (DC level) differs between the data area 6 and the sector address area 5.
  • the length of the VFO required for each address block is set to by setting only the length of the VFO in ID1 longer than the length of the VFO in ID2, ID3, and ID4. This allows unnecessary data to be destroyed, and also ensures that the accuracy of firing the address is maintained.
  • FIG. 27 shows the address area 405.
  • the address block 411 provided in the address area 405 is described so as to extend over both the group track 403 and the land track 402 around the boundary 409 between the groove track 403 and the outer circumferential land track 402.
  • take different values in the address range of Address block 411 is connected to land track 402 Since the data area is commonly included in the address area of the loop track 403, the data area is identified by the same address block 411.
  • the track identification mark 4 1 2 is used for separating the groove track 4 0 3 from the land track 4 0 2 having the same address block 4 1 1 or for separating the land track 4 0 2 from the groove track 4 3. And is provided at the center (408 or 410) of one of the tracks.
  • the track separation mark 412 is provided on the track center 408 of the group track 40S.
  • a track identification mark 4 12 is arranged after the address block 4 11 in order to detect the gate pulse signal generated based on the address block 4 1 1 easily and accurately. ing. That is, the track identification mark 4 12 is reproduced after the address block 4 11 temporally in the reproduction signal.
  • the land track 402 and the group track 403 can be identified only from the reproduction signal, and only the reproduction signal can be recognized regardless of the correspondence between the clean shape and the tracking polarity. Using this, recording and reproduction of a desired track becomes possible.
  • the track-specific mark 412 is recorded on the groove track 403, but it is apparent that the same effect can be expected by recording on the land track 402.
  • FIG. 28 is a configuration diagram of another embodiment of the optical disc recording / reproducing apparatus S according to the present invention.
  • the optical disk recording / reproducing device shown in FIG. 28 is for recording or reproducing information on / from the optical disk of FIG.
  • the track designation means is assumed to be the CPU 601
  • the track identification mark reproducing means is assumed to be the track identification mark reproducing circuit 6. Description will be made assuming that it is 04
  • the ID reproduction circuit 602 reproduces an address block 411 from a signal digitized by the binarization circuit 605, and reproduces an address reproduction circuit 603 and a track separation mark 412. It comprises a track identification mark reproduction circuit 604.
  • FIG. 29 is a configuration diagram of a track weave mark reproduction circuit 604 for reproducing the track S3 ⁇ 4 mark 412 from the optical disk having the address area of FIG. 70 1 is a flip-flop, and 70 2 is a delay element.
  • Signal b is a track identification signal
  • signal c is a binarized reproduction signal
  • signal d is a gate pulse signal based on the reproduced address.
  • the logical address for distinguishing the data area is an address (reproduced by the address reproducing circuit 603) common to the land track 402 and the groove track 403, and the land track 402 and the group track 403. And a 1-bit track identification code.
  • FIG. 29 shows a track Zhaobetsu mark reproducing circuit 604 in the case where the track promptness mark 412 is composed of one bit.
  • the track identification mark reproduction circuit 604 includes a flip-flop 701 and a delay element 702, and an address detection signal d indicating that the immediately previous address has been reproduced is received by the delay element 702.
  • the circuit is delayed by a fixed time and takes in the reproduced signal c to the flip-flop 701 only for the section of the gate.
  • the track Sft mark 4 1 2 (1 bit) which is reproduced with a certain delay after address reproduction, is reproduced.
  • the most significant bit of the logical address is obtained based on the presence or absence of the track identification mark 4 12.
  • the reproduced track identification mark 412 consists of a plurality of bits
  • the track identification signal is generated by comparing with a mark indicating a predetermined land track 402 or groove track 403. Then, it may be done as the most significant bit of the address.
  • the data reproducing circuit 612 compares the address reproduced by the ID reproducing circuit 602 with the address given from the CPU 601 and, if they match, starts reproducing the address. After a certain time, the data is reproduced.
  • the CPU 601 searches for the track again. However, if the uppermost bit power of the address is different, a half track jump is performed, and the track selection signal for selecting the tracking polarity is inverted.
  • the case where only the highest order of the addresses is different means that the common address of the land track and the group track is ⁇ , and the selection power of the land track or group track ⁇ is familiar. Is the case. To correct this, select the polarity of the track. Switching the tracking polarity by inverting the track selection convention.
  • the laser beam travels substantially at the center 408 of the group track, and reproduces the address block 411 and the track ⁇ mark 412 by ⁇ .
  • the laser beam scans substantially the center 410 of the land track and reproduces only the address.
  • the land track 402 and the group track 403 can be identified only from the reproduction signal, and only the reproduction signal can be recognized regardless of the correspondence between the groove shape and the tracking polarity. This enables recording and reproduction on a desired track.
  • the tracking polarity can be automatically switched by the playback signal for the track starved mark, so that it is common regardless of the characteristics of the disc and the recording / playback device e. Tracking is possible. Therefore, compatibility can be improved in the optical discs recorded on both the land track and the groove track.
  • FIG. 30 shows an address area 405 in still another embodiment of the optical disc according to the present invention.
  • a feature of this embodiment is that, in addition to the address blocks 411a, 411b, and 411c, the track identification marks 1101a, 1101b, 1101c, 1102a, and 1102 are included in the address area 40 ⁇ of the optical disc. b and 1102 c.
  • the disk area is formed according to the CAV or ZCAV (ZCLV) format aligned in the radial direction of the disk.
  • address blocks 411a and 411b are provided to starve the data area 406 described later.
  • the address block 411b is formed so as to extend over both the groove track 403b and the land track 402b around the boundary line 409 between the groove track 403b and the land track 402b, and different addresses are provided in different address areas. Is provided.
  • the address block 411b is provided at the center of the groove track 403b and the land track 403b, the same address block 411b is given to the adjacent land track 402b and the data area 406 of the group track 403b in this disc.
  • two track view marks 1101b and 1102b are formed to be shifted from the center 408 of the groove track 403b by about 1/2 track width toward the outer circumference.
  • the two track weave marks 1101b and 1102b existing in the same address area 405 have the same value.
  • the two track ⁇ ⁇ marks are provided at successive positions in the track direction so as to be reproduced continuously in a timely manner.
  • two track IS-specific marks 1101a, 1102a, 1101c, and 1102c are provided for the group track 403a and the group track 403c on the outer circumferential side and the outer track side of the group track 403b.
  • the marks are provided as values different from the marks for the two tracks IS existing in the address areas 405 adjacent in the radial direction.
  • the track identification marks 1101a, 1102a, 1101c, and 1102c on the group tracks 403a and 403c are provided with the same mark 1 (marked by oblique lines at the upper right in FIG. 30).
  • Mark 2 different from mark 1 is provided on the track classification marks 1101b and 1102b on b.
  • the track identification mark is formed as 1-bit data (0 or 1), and pits representing 0 and 1 are provided alternately for each address area meeting in the radial direction.
  • groove track 403b is provided as 1-bit pits as track separation marks 1101b and 1102b, and adjacent group tracks on the inner and outer sides are separated by track KS mark 1101a.
  • No pit as 1102 c To In the optical disk 401 shown in FIG. 30, the track identification marks 1101 and 1102 are provided after the address block 411 so that the detection can be easily and accurately performed by the gate pulse signal generated based on the address block 411. S is arranged. That is, in the reproduction signal, the track separation marks 1101 and 1102 are reproduced temporally after the address block 411.
  • the first track identification marks 1101a, 1101b, and 1101c are the boundary between the groove track 403b and the land track 402b adjacent on the outer peripheral side of the groove track 403b.
  • the second track ⁇ another mark 1102a, 1102b, 1102c is provided on the fiber track 409, and the land track 402a that is in contact with the groove track 403b on the inner peripheral side of the group track 403b. It is provided on the boundary line 407.
  • the first track weave mark is provided on the boundary line 407 of the land track 402a that is in immediate contact with the inner side of the groove track 403b and the groove track 403b
  • the second track 88 is another mark. The same effect can be obtained with a disc provided on the boundary line 409 of the land track 402b, which comes into immediate contact with the outer periphery of the track 403b and the groove track 403b.
  • FIG. 31 is a configuration diagram of another embodiment of the optical disk recording / reproducing device fi according to the present invention.
  • the optical disk recording / reproducing apparatus S of the present embodiment is for recording or reproducing information on the optical disk shown in FIG.
  • the track designation means is assumed to be the CPU 601
  • the track separation mark reproduction means is referred to as the track ⁇ separate mark reproduction circuit 122
  • the track 3 ⁇ 4 separation means is referred to as the track identification circuit 122. I will tell.
  • circuits denoted by reference numerals 601, 605 to 612 perform the same operations as those described in the first embodiment.
  • the ID reproducing circuit 602 is composed of an address reproducing circuit 603 for reproducing the address block 411 from the signal digitized by the binarizing circuit 605, and a track-specific mark 1 101 and 1 It comprises a track identification mark reproducing circuit for reproducing 102 and a track identification circuit for identifying the land track and the groove track.
  • FIG. 32 is a diagram illustrating a track-by-track mark reproducing circuit 1201 for reproducing the track identification marks 111 and 112 from the optical disc 401 shown in FIG. 1701 is a flip-flop, 1302, 1303, 1304, and 1305 are delay elements.
  • FIG. 33 shows the structure of a track identification circuit 122 that generates a track cut signal b from the two track marks 1 110 1 and 110 2 reproduced from the optical disk 401 shown in FIG. It is a block diagram.
  • 1 4 0 1 is the flip-flop that holds the value of the 1-bit 1-bit track male mark 1 1 0
  • 1 4 0 2 is the value of the 1-bit track-specific mark 1 1 0 2
  • the reference numeral 1403 denotes a comparator for comparing two track kick marks
  • the reference numeral 1444 denotes a flip-flop for holding a value of a track identification signal.
  • the gates for taking in the two track separation marks 1 1 0 1 and 1 1 0 2 can be obtained by delaying the address detection signal d by a fixed time. Generates a pulse signal and a gate pulse signal to capture the result of comparison between the two track starves S1I mark 1 101 and 1 1 2.
  • the land address for dividing the data area is the address common to the land track 402 and the group track 400 (played by the address playback circuit 603), the land track 402 and the group track 400. 1 bit that identifies the 1 bit) of the track identification signal b.
  • FIG. 32 shows a track 8 ⁇ separate mark reproducing circuit 1 201 when the track separating marks 1 1 1 1 and 1 1 0 2 are composed of 1 bit.
  • Track identification mark reproduction circuit 1 2 0 1 is flip-flop 1 3 0 1 and delay element 1 3 0 2 and 1
  • the track discrimination circuit 1 202 shown in FIG. 33 is composed of three flip-flops 1401, 1402, 1404, a comparator 1443, a delay searcher 1405, 1 4 0 6, 1 4
  • the e- address detection signal d composed of 0 7 is applied to the delay elements 1 4 0 5, 1 4 0 6, 1
  • the first track moth ⁇ mark reproduced in the track 3 ⁇ 4 separate mark reproduction circuit 122 1 is flip-flop 1 1
  • the track identification mark is taken into the flip-flop 1402, the two track identification marks are compared by the comparator 1443, and the comparison result is held by the flip-flop 144. That is, flip-flop 1 4 0 1,
  • a gate pulse signal obtained by extending the address detection signal d for a fixed time by the delay elements 1405, 1406 and 1407 is applied.
  • a track identification that identifies the currently playing track is a groove track when two track distinction marks meet, and a land track when two track group distinction marks are present. A symbol is generated, and the address of each data area is obtained as the most significant bit of the address.
  • the laser beam scans almost the center of the groove track 408 in the groove track 403 b and the address block 411 is scanned. Play the tortoise distinction mark 1 1 0 1 b, 1 1 0 2 b with the same value as 1 b.
  • the laser beam scans the center of the land track, and the address block 411b and the two different track identification marks 1 1 0 1b and 1 1 0 2c are scanned. To play.
  • the tracking polarity can be automatically switched by the reproduction signal for the two track identification marks, so that the common tracking can be performed regardless of the characteristics of the disc and the recording / reproducing device fi. Is possible. Therefore, the compatibility can be improved in the optical disc recorded on the 5R side of the land track and the groove track.
  • FIG. 34 shows an address area 405 and a control information area 1502 of the optical disc of the present embodiment.
  • reference numeral 402 denotes a land track
  • reference numeral 400f denotes a group track
  • reference numeral 405 denotes an address area
  • reference numeral 411 denotes an address block
  • reference numeral 1501 denotes a track identification mark.
  • the address block 411 provided in the address area 405 is composed of the group track 403 and the land track 404 centered on the boundary line 409 between the groove track 403 and the land track 402. It is marked green so as to straddle both, and a different address is provided in all address areas.
  • the data areas of the adjacent land track 402 and groove track 400 are identified by the same address block 4111.
  • Tracks »Another mark 1 5 0 1 is the center of at least one land track 4 0 2 or a group track 4 0 3 at a specific position in the defined control information area 1 5 0 2 4 0 8 Alternatively, it is provided in the data area 406 on 410.
  • the track separation mark 1501 is used to identify whether the track provided with the track identification mark 1501 is a land track 402 or a group track 4003. However, it differs between the case where it is provided on a land track and the case where it is provided on a groove track.
  • a 1-bit track identification mark 1501 is provided.
  • the track identification mark representing the land track it can be understood that the polarity of the current tracking is for reproducing the land track. Therefore, by reproducing the track identification mark 1501 only from the reproduced signal and detecting the no, "turn", it is possible to obtain the correlation between the groove shape of the track being reproduced and the tracking polarity.
  • the data area 406 after the address block 411 is located in the data area 406 so that it can be easily and accurately detected by the gate pulse convention created based on the address block 411.
  • the track identification mark 1501 is provided. That is, the track-by-track mark 1501 is reproduced temporally after the address block 411 in the reproduction signal. Note that in FIG. 34, the track identification mark 1501 is marked in green in the data area on the group track 400, but the same can be obtained by recording in the data area on the land track 402. It is clear that the effect can be expected.
  • FIG. 35 is a configuration diagram of still another embodiment of the optical disc recording / playback device fi according to the present invention.
  • the optical disk recording / reproducing device fi shown in FIG. 35 records or reproduces information with respect to the optical disk shown in FIG.
  • the track determination means is assumed to be CPU 611
  • the track polarity determination means is assumed to be track polarity determination circuit 1601
  • the track selection signal correction means is assumed to be track selection signal correction circuit 1602. explain.
  • the track polarity discrimination circuit 160 when reproducing the track provided with the control information area 1502, takes out the track identification mark 1501 from the reproduction signal from the data reproduction circuit 6122 and reproduces it. It determines whether the current track is a land track or a groove track and obtains the correspondence between the specified track selection signal and the track groove shape (land or group), and It is determined whether or not the selection has been performed correctly, and a tracking determination signal is generated.
  • the track selection signal correction circuit 1602 corrects the track selection signal from the CPU 601 according to the correctness of the tracking selection of the track polarity determination circuit 1601.
  • FIG. 36 it is determined from the track identification mark 1501 (reproduced signal h) in the control information area 1502 of the optical disc shown in S34 and the track selection criterion i of the CPU 601 whether or not the tracking is correctly selected.
  • 1 is an example of a configuration diagram of a track polarity determination circuit 1601.
  • FIG. 1701 is an exclusive OR gate
  • 1702 is a flip-flop
  • 1703 is a delay element.
  • FIG. 37 is an example of a configuration diagram of a track selection signal correction circuit 1602 that corrects a track selection signal i of the CPU 201 based on a track selection determination signal g in which a track selection determination ridge is determined by the track polarity determination circuit 1601. . 1801 is an exclusive OR gate.
  • optical disc recording / reproducing apparatus configured as described above when an optical disc is loaded will be described below.
  • the recording / reproducing apparatus S reproduces the control information area 1502 of the specific track provided with the track identification mark 1501.
  • the CPU 601 outputs a track polarity signal (different signal k) to the track identity determination circuit 1601.
  • a processing address of a track including a control information area 1502 provided with a track separation mark 1501 is given to the CPU 601
  • a seek command for a target track is issued to the linear motor control circuit 607 to drive the linear motor 609.
  • the optical head 610 is moved near the target track.
  • the CPU 601 reaches the target track by outputting to the focus tracking control circuit 608 a track jump command and a track changeover signal i according to whether the track is a land track or a groove track.
  • the focus tracking control circuit 608 switches the polarity of the tracking control, performs a half track jump, and focuses and tracks a target track.
  • the logical address for identifying the data area includes an address common to the land track 402 and the group track 403 (reproduced by the address reproducing circuit 603) and a group address. It shall be represented by a 1-bit (for example, the most significant 1-bit) track selection signal that identifies the sub-track and the land track.
  • the data reproducing circuit 612 compares the address reproduced by the ID reproducing circuit 602 with the address given by the CPU 601 and, if they match, reproduces the data after a fixed time from the address reproducing. .
  • the control information area 1502 of the track provided with the track identification mark 1501 is reproduced.
  • FIG. 36 shows a track polarity discriminating circuit 1601 when the track identification mark 1501 is composed of one bit.
  • the track weave mark 1 5 0 1 (playback signal h) or 1 indicates the track weave mark 1 5 0 1 on the group track 4 0 2, and the 0 indicates the land track 4 0 2 on the land track 4 0 2
  • the track identification mark 1501 has been written.
  • the CPU 601 selects the groove track 403, it outputs 1 as the track selection symbol i, and when it wants to select the land track 402, it outputs 0.
  • the exclusive OR gate 1701 in FIG. 36 detects an error in track selection when the track selection signal i and the reproduced track identification mark 1501 (playback h) are different. .
  • the track polarity discrimination command signal from the CPU 601 and the address detection signal d from the address reproduction circuit 603 are used as a gate pulse signal for capturing the discrimination result of the track selection in the flip-flop 1702.
  • the delay element 1703 delays the address detection signal d for a predetermined time in order to generate a gate pulse signal when capturing a signal indicating the correctness of the track selection.
  • the track selection signal correction circuit 1602 in FIG. 37 performs correction based on the track polarity discrimination signal when tracking is performed in accordance with the track selection signal i.
  • a 1 appears in the track polarity determination signal g.
  • the track selection signal i is re-developed and given to the focus tracking control circuit 608. This inversion operation is performed by the exclusive OR gate 1 8 0 1 in FIG. It is.
  • the data of the track provided with the track flag mark 1501 is reproduced, and the flip-flop 1720 in the tracking polarity discriminating circuit 1601 is used by the CPU 6101. Since the discrepancy between the track select signal and the tracking polarity is described, the track selection for subsequent data reproduction and recording is corrected based on the track polarity discrimination signal g. Tracking will always be done.
  • the polarity of the group track and the land track and the CPU 601 output in advance.
  • the tracking polarity can be corrected by providing the track-specific mark 1501 only in one track, the recording capacity can be obtained as compared with the case where the track-specific marks are provided in all the address areas. be able to.
  • the tracking polarity can be automatically switched by the reproduction signal for the track separation mark. It is possible. Therefore, compatibility can be improved in the optical disc recorded on both the land track and the group track.
  • the optical disk having 2 or 4 address blocks in the sector address area has been described, but it is also possible to provide 3 or 5 or more address blocks in one sector address area. good. As the number of address blocks increases, the readability of the address improves, and the discrimination ellipse of the land group also improves. Industrial applicability As described above, according to the present invention, in an optical disc capable of recording and reproducing information on land tracks and groove tracks, five or more address blocks are provided in one sector address area, and these are arranged radially inward relative to the track center.
  • the sector address can be reliably read even if the light spot is out of track, and at the same time, the tracking error signal in the sector address area can be reduced. Disturbance in tracking control due to level fluctuation can be reduced. As a result, an optical disk is provided which is less likely to cause an error in removing the address signal.
  • the optical disk recording / reproducing apparatus when reproducing the information of the address block which has been pulled, the address number which is determined according to whether the track is a land track or a groove track. Is corrected according to the duplication order number (ID number), so that a different address number can be obtained for each address block within one sector address to obtain an accurate address value.
  • ID number the duplication order number
  • the R which reproduced the data of the wobbled address block is added to the address of the overlapping address number of the inner address block and the address of the double address number of the outer address block.
  • the tracking error signal at the inner peripheral address block, t is the reflected light.
  • the tracking signal is offset or symmetrically generated, so that tracking is stable even during address reproduction.

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  • Optical Recording Or Reproduction (AREA)

Abstract

Dans une zone (5) d'adresses de secteurs, les blocs d'adresses (16, 17, 18 et 19) contenant les numéros d'adresses et les numéros d'identification sont déviés de manière alternée vers l'intérieur et vers l'extérieur depuis le centre de la piste par presque un demi pas de piste. Par conséquent, la lecture des adresses sur un disque optique d'enregistrement/de reproduction du type crête-sillon et la stabilité de repérage dans la zone d'adresses de secteurs peuvent être améliorées.
PCT/JP1996/000353 1995-02-17 1996-02-16 Disque optique et dispositif d'enregistrement/de reproduction sur disque optique WO1996025736A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
MXPA96004888A MXPA96004888A (es) 1995-02-17 1996-02-16 Un disco optico y un dispositivo grabado/reproduccion de este disco optico.
KR1019960705811A KR100251018B1 (ko) 1995-02-17 1996-02-16 광학 디스크 및 광학 디스크 기록/재생 장치
EP96902467A EP0757343B1 (fr) 1995-02-17 1996-02-16 Disque optique et dispositif d'enregistrement/de reproduction sur disque optique
DE69608370T DE69608370T2 (de) 1995-02-17 1996-02-16 Optische platte und aufzeichnungs- und wiedergabegerät für optische platten
HK98114590A HK1016819A1 (en) 1995-02-17 1998-12-22 Optical disk and optical disk recording and reproducing device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2943695 1995-02-17
JP7/29436 1995-02-17
JP7/261245 1995-10-09
JP26124595 1995-10-09

Publications (1)

Publication Number Publication Date
WO1996025736A1 true WO1996025736A1 (fr) 1996-08-22

Family

ID=26367653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/000353 WO1996025736A1 (fr) 1995-02-17 1996-02-16 Disque optique et dispositif d'enregistrement/de reproduction sur disque optique

Country Status (1)

Country Link
WO (1) WO1996025736A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5898663A (en) * 1995-02-14 1999-04-27 Hitachi, Ltd. Optical recording medium with address information prepit for the same track at opposite boundaries of the same track
US5953310A (en) * 1995-02-14 1999-09-14 Hitachi, Ltd. Optical recording medium using land/groove recording
US6163522A (en) * 1996-03-25 2000-12-19 Mitsubishi Denki Kabushiki Kaisha Optical recording medium having the physical address of sectors monotonically change along spiral tracks
US6320830B1 (en) 1998-02-02 2001-11-20 Mitsubishi Denki Kabushiki Kaisha Optical information reproduction device and signal processing circuit used therein
US6333902B1 (en) 1998-04-17 2001-12-25 Samsung Electronics., Ltd. Method for generating land/groove switching signal from POLG type disc and apparatus therefor
US6373815B1 (en) 1996-10-25 2002-04-16 Matsushita Electric Industrial Co., Ltd. Optical disc having oscillating lands and grooves
US6625092B2 (en) 1997-06-16 2003-09-23 Kabushiki Kaisha Toshiba Recording/reproducing optical disk with zig-zag shift headers and recording/reproducing apparatus using same
US7072287B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion

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Publication number Priority date Publication date Assignee Title
JPS5750330A (en) * 1980-09-11 1982-03-24 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS62239324A (ja) * 1986-04-09 1987-10-20 Matsushita Electric Ind Co Ltd 光デイスクのアドレス再生回路
JPH0660431A (ja) * 1992-08-07 1994-03-04 Ricoh Co Ltd 光ディスク
JPH06176404A (ja) 1992-12-02 1994-06-24 Matsushita Electric Ind Co Ltd 光ディスク及びそれを用いた光ディスク装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750330A (en) * 1980-09-11 1982-03-24 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JPS62239324A (ja) * 1986-04-09 1987-10-20 Matsushita Electric Ind Co Ltd 光デイスクのアドレス再生回路
JPH0660431A (ja) * 1992-08-07 1994-03-04 Ricoh Co Ltd 光ディスク
JPH06176404A (ja) 1992-12-02 1994-06-24 Matsushita Electric Ind Co Ltd 光ディスク及びそれを用いた光ディスク装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0757343A4 *

Cited By (49)

* Cited by examiner, † Cited by third party
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US6552994B2 (en) 1995-02-14 2003-04-22 Hitachi, Ltd. Optical reproduction apparatus
US6314075B2 (en) 1995-02-14 2001-11-06 Hitachi, Ltd. Optical recording/reproducing apparatus
US6064644A (en) * 1995-02-14 2000-05-16 Hitachi, Ltd. Optical recording medium having particular arrangement of prepits and manufacturing method thereof
US7154842B2 (en) 1995-02-14 2006-12-26 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US6195316B1 (en) 1995-02-14 2001-02-27 Hitachi, Ltd. Optical recording medium using land/groove recording
US6262968B1 (en) 1995-02-14 2001-07-17 Hitachi, Ltd. Optical information processing apparatus
US6580685B2 (en) 1995-02-14 2003-06-17 Hitachi, Ltd. Optical recording medium with aligned prepit portion
US7151721B2 (en) 1995-02-14 2006-12-19 Hitachi, Ltd. Optical recording method using land/groove recording
US7099263B2 (en) 1995-02-14 2006-08-29 Hitachi Ltd Optical reproducing method for optical medium with aligned prepit portion
US7092349B2 (en) 1995-02-14 2006-08-15 Hitachi, Ltd. Optical reproducing method optical medium with aligned prepit portion
US6370106B2 (en) 1995-02-14 2002-04-09 Hitachi, Ltd. Optical reproduction apparatus
US6603730B2 (en) 1995-02-14 2003-08-05 Hitachi, Ltd. Optical reproducing method
US6392985B2 (en) 1995-02-14 2002-05-21 Hitachi, Ltd. Optical reproduction apparatus for reproducing information from optical recording medium having wobbled address pits
US6430146B1 (en) 1995-02-14 2002-08-06 Hitachi, Ltd. Optical reproducing method
US6430142B2 (en) 1995-02-14 2002-08-06 Hitachi, Ltd. Method for reproducing information from optical medium
US6483800B2 (en) 1995-02-14 2002-11-19 Hitachi, Ltd. Optical reproduction apparatus for reproducing information from an optical recording medium having wobbled pits
US6529470B2 (en) 1995-02-14 2003-03-04 Hitachi, Ltd. Optical recording medium with aligned prepit portion
US6532207B2 (en) 1995-02-14 2003-03-11 Hitachi, Ltd. Optical reproducing method
US6538981B2 (en) 1995-02-14 2003-03-25 Hitachi, Ltd. Optical reproduction apparatus
US6538980B2 (en) 1995-02-14 2003-03-25 Hitachi, Ltd. Optical disc
US5898663A (en) * 1995-02-14 1999-04-27 Hitachi, Ltd. Optical recording medium with address information prepit for the same track at opposite boundaries of the same track
US6542457B2 (en) 1995-02-14 2003-04-01 Hitachi, Ltd. Method for reproducing information from recording medium having grooves and lands as tracks divided into units
US6545973B2 (en) 1995-02-14 2003-04-08 Hitachi, Ltd. Optical reproduction apparatus
US6549510B2 (en) 1995-02-14 2003-04-15 Hitachi, Ltd. Optical recording medium having grooves and lands
US6542456B2 (en) 1995-02-14 2003-04-01 Hitachi, Ltd. Optical reproducing method
US5953310A (en) * 1995-02-14 1999-09-14 Hitachi, Ltd. Optical recording medium using land/groove recording
US7092350B2 (en) 1995-02-14 2006-08-15 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US6611489B2 (en) 1995-02-14 2003-08-26 Hitachi, Ltd. Information reproducing method for an optical medium having grooves and lands
US7085222B2 (en) 1995-02-14 2006-08-01 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7082098B2 (en) 1995-02-14 2006-07-25 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US6795390B2 (en) 1995-02-14 2004-09-21 Hitachi, Ltd. Information recording method
US6845081B2 (en) 1995-02-14 2005-01-18 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US6996054B2 (en) 1995-02-14 2006-02-07 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072287B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072282B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072277B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072288B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072279B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072286B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072278B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7072281B2 (en) 1995-02-14 2006-07-04 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US7079478B2 (en) 1995-02-14 2006-07-18 Hitachi, Ltd. Optical reproducing method for optical medium with aligned prepit portion
US6337839B1 (en) * 1996-03-25 2002-01-08 Mitsubishi Denki Kabushiki Kaisha Optical disk recording medium and optical disk drive apparatus
US6163522A (en) * 1996-03-25 2000-12-19 Mitsubishi Denki Kabushiki Kaisha Optical recording medium having the physical address of sectors monotonically change along spiral tracks
US6373815B1 (en) 1996-10-25 2002-04-16 Matsushita Electric Industrial Co., Ltd. Optical disc having oscillating lands and grooves
KR100386531B1 (ko) * 1997-06-16 2003-12-31 가부시끼가이샤 도시바 지그재그형으로배치된헤더를갖는기록재생광디스크와그기록재생장치
US6625092B2 (en) 1997-06-16 2003-09-23 Kabushiki Kaisha Toshiba Recording/reproducing optical disk with zig-zag shift headers and recording/reproducing apparatus using same
US6320830B1 (en) 1998-02-02 2001-11-20 Mitsubishi Denki Kabushiki Kaisha Optical information reproduction device and signal processing circuit used therein
US6333902B1 (en) 1998-04-17 2001-12-25 Samsung Electronics., Ltd. Method for generating land/groove switching signal from POLG type disc and apparatus therefor

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