WO1998013823A1 - Support d'enregistrement et appareil de reproduction correspondant - Google Patents
Support d'enregistrement et appareil de reproduction correspondant Download PDFInfo
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- WO1998013823A1 WO1998013823A1 PCT/JP1997/002442 JP9702442W WO9813823A1 WO 1998013823 A1 WO1998013823 A1 WO 1998013823A1 JP 9702442 W JP9702442 W JP 9702442W WO 9813823 A1 WO9813823 A1 WO 9813823A1
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- Prior art keywords
- signal
- data
- address
- group
- recording medium
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Classifications
-
- 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
- G11B7/007—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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/1055—Disposition or mounting of transducers relative to record carriers
- G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
- G11B11/10563—Access of indexed parts
-
- 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
Definitions
- the present invention relates to a magneto-optical recording medium (hereinafter, simply referred to as a "disk”) capable of recording and reproducing data and a reproducing apparatus therefor.
- a magneto-optical recording medium hereinafter, simply referred to as a "disk”
- Mini discs are engraved with groups according to the waveform shape of signals obtained by FM-modulating carrier waves that are used as rotation synchronization signals with address information. These groups are used for rotation control and detection of address information. You. This method of recording information and W production is generally called the wobbling method.
- FIG. 84 is a diagram showing a configuration of a conventional disk reproducing apparatus K.
- this disk T raw device converts the laser beam emitted from a laser light source of an optical pickup (not shown) into a main beam by a diffraction grating.
- the address information is read out by the push-pull signal from the main beam, and the tracking is controlled at the center of the land. Is to read address information recorded in the group by the push-pull signal from the side beam.
- the present invention provides a recording medium capable of reading address information recorded by wobbling the side walls on both sides of a group with one laser beam not only when recording data on the land but also on the group.
- the purpose is to provide the device.
- the purpose of this purpose is to have a fixed width with at least one of a land whose width changes and an address identification section including a groove of 1 and a wall that is swung according to two pieces of address information. This is achieved by providing a recording medium having an address portion including a second group connected to the first groove.
- an object of the present invention is a reproducing apparatus for performing 4: on the recording medium, wherein the detecting circuit irradiates the recording medium with light to detect reflected light, and responds to the reflected light detected by the detecting circuit.
- An address information reproduction circuit for generating address information by FT; an address identification information reproduction circuit for reproducing address identification information in response to reflected light from the address identification unit detected by the detection circuit;
- a playback circuit comprising a selection circuit for selecting one of the two pieces of address information generated by the address information raw circuit in response to one piece of address identification information reproduced by the information raw circuit. Achieved by providing.
- the main advantages of the present invention are that the number of optical components required in the W raw device is reduced and the intensity of the laser beam applied to the recording medium for data reproduction can be increased. With the playback device, more reliable data playback can be realized. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a perspective view showing the structure of a disk according to Embodiment 1 of the present invention
- FIG. 2E is a diagram showing the format of the disk shown in FIG.
- FIG. 3 is a diagram showing the planar structure of the disk at the portion of the address mark shown in FIG. 2,
- FIG. 4 is a diagram showing the planar structure of the address portion shown in FIG. 2, and a diagram in which a beam spot scans a group;
- FIG. 5 is a diagram showing the planar structure of the address portion shown in FIG. 2, and is a diagram in a case where the beamsbot scans a land.
- FIG. 6 is a perspective view showing the structure of a TOC area provided on the outer peripheral portion of the disc according to the first embodiment
- FIG. 7 is a diagram showing the configuration of the playback device according to the first embodiment
- FIG. 8A-8D is a diagram showing a waveform of an address identification signal output from a comparator included in the reproducing apparatus shown in FIG. 7,
- FIG. 9 is a perspective view showing the structure of the data portion of the disk according to the second embodiment of the present invention.
- FIG. 10 is a diagram showing an example of a binary signal for wobbling in the address portion and the data portion.
- FIGS. 11 and 12 are plan views showing the structure of the disk according to the second embodiment
- FIGS. 13A-13D are diagrams showing the format of the disk according to the second embodiment of the present invention.
- FIG. 14A shows the layout on the disk of the address portion shown in FIG. 13C
- FIG. 14B shows the wobble signal obtained by reproducing the address portion
- FIG. 14C shows the address information. Diagram showing the contents
- FIG. 15 is a block diagram showing the configuration of the production device according to the second embodiment.
- FIGS. 16A and 16B are diagrams showing synchronization signals generated by the playback device shown in FIG. 15,
- FIG. 17, FIG. 18 and FIG. 19 are graphs showing the regeneration characteristics of the T-raw device shown in FIG.
- FIG. 20 is a diagram for explaining data reproduction in a portion where a clocking cable is formed.
- Fig. 21 is a plan view showing the structure of the clocking
- FIG. 22 is a plan view showing the structure of a disc according to Embodiment 3 of the present invention
- FIG. 23D is a diagram showing the format of the disk according to the third embodiment
- FIG. 24 is a diagram showing the layout on the disk of the address portion shown in FIG. 23C.
- Fig. 4B shows the Poble No. 3 obtained by raw F * i in the address section
- Fig. 24C shows the contents of the address.
- the second 5 Figure shows the structure of a disk according to a fourth embodiment of the present invention [psi: rear view, second 6 Figure is a plan view showing the structure of a disk according to a fifth embodiment of the trees invention, the second 7 Figure FIG. 28 is a plan view showing the structure of the disk according to Embodiment 6 of the present invention, FIG. 28 is a plan view showing the structure of the disk according to Embodiment 7 of the present invention, and FIG. FIG. 30A is a diagram showing a format of a disk according to the seventh embodiment, and FIGS. 30A to 30C are waveform diagrams for explaining generation of a disk according to the seventh embodiment.
- FIG. 31 is a plan view showing the structure of a disc according to Embodiment 8 of the present invention
- FIG. 32A-32C are views for explaining the principle of offset correction by detecting fine clock marks.
- FIG. 33 is a diagram showing a configuration of a reproducing apparatus according to Embodiment 8.
- FIG. 34 is a plan view showing the structure of the disk according to Embodiment 9 of the present invention
- FIG. 35 is a plan view showing the structure of the disk according to Embodiment 10 of the present invention
- FIG. FIG. 37 is a plan view showing a structure of a diff and a disk according to Embodiment 11 of the present invention
- FIG. 37 is a perspective view showing a structure of a disk according to Embodiment 12 of the present invention
- FIG. FIG. 2 is a plan view showing the structure of a disc according to Embodiment 12;
- FIG. 39 is a plan view showing the structure of the wobble shown in FIGS. 37 and 38
- FIG. 4D-4OD is a diagram for explaining the recording of address information by the bi-modulation method.
- FIG. 41 is a plan view showing the structure of the address portion of the disk according to Embodiment 12 of the present invention
- FIG. 42 is a diagram showing the format of the address portion of the disk according to Embodiment 12 of the present invention.
- FIG. 43 is a block diagram showing a configuration of a cutting device for manufacturing a disc according to Embodiment 12;
- FIG. 44 is a block diagram showing the configuration of the playback device according to Embodiment 12;
- FIG. 45 is a diagram for explaining the detection of a pebble in the reproducing apparatus shown in FIG. 44,
- FIGS. 46 and 46 are waveform diagrams for explaining the operation of the cobble detection circuit shown in FIG. 45.
- FIG. 47 is a graph showing the raw characteristics of the disc according to Embodiment 12 of the present invention.
- FIG. 48 is a diagram showing the configuration of the cobbled detection circuit according to Embodiment 13 of the present invention. Is a block diagram showing a configuration of a cutting device according to Embodiment 14 of the present invention,
- FIG. 51 is a block diagram showing a configuration of a force-setting device according to Embodiment 15 of the present invention.
- FIG. 52 is a plan view showing the structure of the disk according to Embodiment 6 of the present invention.
- FIG. 53 is a plan view showing the structure of the disk according to Embodiment 17 of the present invention. Is a plan view showing a structure of a disk according to Embodiment 18 of the present invention,
- FIG. 55 is a plan view showing a structure of a disk according to Embodiment 19 of the present invention, and
- FIG. FIG. 57 is a plan view showing the structure of a disk according to Embodiment 20 of the present invention, and
- FIG. 57D is a plan view for explaining the relationship between the position of the laser beam applied to the group and the obtained data reproduction signal.
- Fig. 5 8A-5 8F is a diagram for explaining the tracking control method for eliminating the maximum leakage
- FIG. 59 is a block diagram showing a configuration of a ⁇ raw device according to Embodiment 21 of the present invention
- FIG. 60 is a diagram showing a configuration of a tracking correction circuit shown in FIG. 59
- FIG. Is a diagram showing another example of the configuration of the tracking correction circuit shown in FIG. 59
- FIG. 62 is a plan view showing the structure of a disk according to Embodiment 22 of the present invention
- FIG. FIG. 64 is a diagram showing the configuration of a leakage erasing circuit according to Embodiment 22
- FIG. 64 is a waveform diagram for explaining the operation of the circuit shown in FIG. 63
- FIG. 66 is a graph for explaining the operation of the circuit shown in FIG. 65
- FIG. 67 is a plan view showing a structure of a disk according to Embodiment 24 of the present invention.
- FIG. 68 is a view showing a configuration of a leakage canceling circuit according to Embodiment 25 of the present invention.
- FIG. 69 is a waveform diagram for explaining the operation of the circuit shown in FIG. 68
- FIG. 70 is a diagram showing a configuration of the leakage elimination circuit according to the present embodiment 25
- FIG. 71 is a waveform diagram for explaining the operation of the circuit shown in FIG. 70;
- FIGS. 72A-72D are waveform diagrams for explaining the principle of the leakage elimination method according to Embodiment 26 of the present invention.
- FIG. 73 is a plan view showing the structure of a disk according to Embodiment 27 of the present invention.
- FIG. 74 is a perspective view showing the structure of a disk according to Embodiment 27 of the present invention.
- FIG. 75 is a plan view showing the structure of the disc according to the embodiment 27,
- FIG. 76 is a block diagram showing the configuration of a data recording / reproducing apparatus according to Embodiment 27,
- FIG. 77 is a diagram for explaining the reproduction of the disc according to the present embodiment 27, and FIGS. 78A-78D are for explaining the operation of the data recording / reproducing apparatus shown in FIG. Timing diagram for
- FIG. 79 is a diagram showing the configuration of the synchronization signal generation circuit shown in FIG. 76.
- FIG. 80 C is a diagram for explaining address information recorded on the disc according to the tree embodiment 27;
- FIGS. 81, 81 and 82 are diagrams for explaining the detection of address information recorded as a wobble.
- FIG. 83 is a diagram showing the structure of the address detection circuit shown in FIG. 76.
- FIG. 84 is a diagram showing the configuration of a conventional disk and its production device.
- FIG. 1 is a perspective view showing a structure of a disc according to Embodiment 1 of the present invention.
- grooves (groups) 3 are formed on the surface of this disc. It is engraved spirally from the inner circumference to the outer circumference of the disc.
- the glass master of the disc is cut by cutting the 1.1-Milz carrier in accordance with the cobble signal FM-modulated with a bi-phase signal with a frequency deviation of 50 KHz.
- the group 3 is formed.
- the frequency of the carrier is determined by the number of addresses allocated to the entire disk, but it is desirable to set the frequency in the range of 200 K 11 z to 1 O MHz.
- the amplitude of the wobble provided on both side walls of the group 3 thus formed is about 30 nm to 50 nm in the disk radius (tracking) direction.
- the depth of the group 3 is set to be approximately 1-6 to 1 / 1'2 of the laser light wavelength so that the crosstalk from the adjacent tracks recorded in the land 4 and the group 3 is reduced.
- each land or group track on the disc is composed of 60 donut-shaped zones, and during playback, the so-called CAV (Constant Average Veloci ty) Control power is performed.
- CAV Constant Average Veloci ty
- the disk is rotated at a high rotational speed in the inner peripheral zone and at a low rotational speed in the outer peripheral zone so that the linear velocity by this control becomes substantially constant in each zone.
- FIG. 2E-2E is a diagram showing the format of the disc shown in FIG.
- one track includes N f frames, and specifically, in the inner peripheral zone, 42 frames are included in the track of one rotation of the disk.
- the outer peripheral zone 101 frames are included in one track of the disk.
- each frame includes 26 segments, and address information is recorded only in the address segment located at the head of the segment. The data is recorded in continuous 25 data segments following the address segment, and the side wall of the group is not wobbling in this data segment.
- each segment has a The lock mark 20 is recorded, and the rotation of the disk is controlled by this.
- the amplitude of this fine mark is also about 30 nm to 50 nm in the radial direction of the disk, similar to the address information.
- the fine clock mark enables generation of a master signal for data reading, and realizes a data modulation method having no clock component.
- the address segment includes a reservation information (Rvd), an address ( ⁇ ), a preamble (PA), and an address in the order following the fine lock mark 20.
- Dress 1, address 2, preamble ( ⁇ ), read / write (R / W) test information are recorded.
- address 1 and address 2 indicate the locations of data recorded in the group or data recorded in the land, respectively.
- each of the addresses 1 and 2 includes, in order from the beginning, a 4-bit synchronization pattern (Sync), 24-bit address data, and 6-bit reservation information.
- Sync 4-bit synchronization pattern
- R vd a 14-bit error detection code
- CRC—Cyclic Redundancy Code is recorded.
- the number of these bits is variable depending on the disk capacity and the method of setting the address. For example, in the portion following the address data, for example, a laser power condition setting address mark for data recording or reproduction is used. It is also possible to record information specific to the disc, which is information that replaces the function, as a pebble.
- the coding method of the address information is not limited to the bi-fuse code ⁇ , but may be Manchester code, NRZ, NRZ I code, or the like.
- the data in each frame is composed of 25 data segments separated into each section, but is not limited thereto, and is data that is not separated into each section. You may.
- each data segment includes a front area, a data area, and a rear area following the fine lock mark 20.
- FIG. 3 is a diagram showing the planar structure of the disk at the address mark (AM) shown in FIG. 2C.
- the address marks are recorded by forming the odd-numbered grooves 3 O and the even-numbered grooves 3 E so that their phases are reversed.
- the width of glue 3 O is constant
- the center is formed so that it shifts 0.1 ⁇ m downward in section L1 and 0.1 ⁇ m upward in section L with reference to section L0.
- the width of group 3E is the same as that of darb 3 O, and the center is 0.up / m in ward L1 and 0 down in ward L2 based on ward L0. It is formed so as to be shifted by 1 ⁇ m.
- the land 4E sandwiched between group 3O and group 3E has a width of 0.35 m in section L1, and In L2 it is 0.75.
- the land 4 O sandwiched between the group 3 E and the dub 3 O has a width of 0.75 ⁇ in section L 1 and 0.35 / m in section 2.
- FIG. 4 and FIG. 5 are diagrams showing the planar structure of the disk on which the address shown in FIG. 2C] and address 2 are recorded.
- each of the grooves 30, 3E has a constant width, and has a side wall that is subjected to a wobbling according to the address information 1, m, and n.
- address information (n) and (m) are recorded on the lands 4E and 4O by wobbling both side walls of the grooves 3 ° and 3E.
- FIG. 6 is a perspective view showing the structure of a TOC (Table Of Content) area used on the outer peripheral portion of the disc.
- TOC Table Of Content
- the pebbles 83 provided on both side walls of the group 82 have a frequency in the range of 200 KHz to 1 OMHz, and the length of the TOC region is about 160 ⁇ m from the outer periphery of the disk.
- the laser beam irradiates the TOC information recorded in the wobbles and pit rows in this way. It is reproduced by doing.
- the TOC information can be recorded at a high density, and the TOC information can be reproduced at a high speed.
- FIG. 7 is a diagram showing a configuration of an I-so-: device according to Embodiment 1 of the present invention.
- this regenerating apparatus has a photodetector 113 having a photodetector divided into four areas, and amplifiers 241, 253 connected to the photodetector 113.
- a comparator 25 4 connected to the amplifier 25, an address mark detector 100 connected to the comparator 2 54, a low-pass filter (LFF) 24 2 connected to the amplifier 24 1,
- the inverting amplifier 255 connected to the LPF 242 and the switch SW for switching the tracking polarity, the bandpass filter (BPF) 250 connected to the amplifier 241 and the BPF 265 Conno, connected.
- It has a radar 245 and an address mask detector 110 connected to the comparator 245.
- the laser beam emitted from the laser light source of the optical pickup passes through the collimator lens, enters the objective lens from the beam splitter, is focused on the disk, and is shown in Figs. 4 and 5.
- a beam spot 12 is formed.
- the light reflected from the beam spot is converted into an electric signal by the photodetector 113.
- the signal (A + D) corresponding to the intensity of light detected by the regions 1 13a and 113d of the photodetector 1 13 and the region] 1 3b, 1 1 3 test in c!
- a tracking error signal and a signal obtained by inverting the signal by the inverting amplifier 255 are input to the switch SW terminal.
- the switch SW selectively switches either one of the signals. To the circuit 2 57.
- the pushable signal output from the amplifier 241 is input to the BPF 256, so that the comparator 245 outputs a wobble signal.
- the band center frequency of the BPF 225 is 1.1 MHz, and a signal is output to the comparator 245 except for noise.
- the comparator 245 shapes the waveform of the input signal, and outputs a cobble signal consisting of a rectangular wave.
- the rectangular wave output from the comparator 245 is input to the FM demodulator 258, and the demodulator 258 demodulates the bi-directional code and outputs it to the NRZ demodulator 259.
- the NRZ demodulator 259 demodulates an NRZ signal as an address ( ⁇ ⁇ ⁇ ⁇ ) from the biphase code. The address thus obtained is manually input to the system controller 268.
- the photodetector 113 scans from the left to the right on the center line OGL of the group 3O, the address identification shown in FIG.
- the signal AMG 1 is output, and the address mark detector 110 supplies a signal for selecting the address 1 to the system controller 268.
- the comparator 245 outputs the address identification signal AMG 2 shown in FIG.
- the mark detector 110 supplies a signal for selecting the address 2 to the system controller 268.
- the system controller 268 selects one address information and recognizes one address corresponding to one data recorded in the groups 3 ° and 3E. Therefore, in the case shown in FIG. 4, the address information n is It will be recognized by the controller 2 6 8.
- the above operation is mainly for the case where the system controller 268 instructs the recording or reproduction of data in the groups 3O and 3E, but the following description is based on the system controller 268.
- the case where 8 indicates data recording or raw data in lands 40 and 4E will be described.
- the address information is not read as the address 1, but (NG)
- the address information (n) is read as address 2.
- the signal ( ⁇ + D) and the signal (B + C) are summed by the amplifier 253, and the result is input to the comparator 254. It is detected as a change in the amount of reflected light.
- the photodetector 113 scans from the left to the right on the center line ELL of the land 4E shown in FIG. 3 from the left, the eighth from the comparator 25 4 shown in FIG.
- the address identification signal AML2 shown in Fig. B is output, and the address mark detector 100 supplies a signal for selecting the address 2 to the system controller 268.
- the comparator 25 4 shown in FIG. The address identification signal AML 1 is output, and the address mark detector 1 () 0 supplies a signal for selecting the address 1 to the system controller 268.
- the address information (n) is recognized by the system controller 28 as one address for one data recorded on the land 4E.
- the switch SW When the beam spot 12 is controlled to irradiate the center of the lands 4 O and 4 E, the switch SW operates so that the inverted tracking error signal is supplied to the servo circuit 257. It is switched by the system controller 268. Since the disk in the present embodiment is configured as described above, in addition to the magneto-optical recording medium, it is a CD-WO (write-once) disk, a phase change disk, or a so-called mini disk. The same thing can be considered.
- the master glass for producing the disc in the embodiment of the wood is manufactured in the mastering process in the following manner. It is formed by using a fobble signal obtained by FM-modulating a carrier at 1 MHz with a bi-phase signal at 50 KHz, but using a bi-phase signal as it is without FM modulation to form a group. Can also be formed.
- the amplitude of the wobbles provided in groups 3 ⁇ and 3E is from 30 nm to 50 nm in the radial direction of the disk, but is not limited to this. It may be in the nm range.
- FIG. 9 is a perspective view showing a structure of a data recording section (hereinafter, also simply referred to as “data section”) in the disc according to Embodiment 2 of the present invention.
- the disk according to the present embodiment enables recording and reproduction of magnetic data in both the land 4 and the group 3 as in the disk according to the first embodiment.
- the data section of the disc is different in that a group 3 for generating a synchronization signal required for controlling the rotation of the disc and for recording / reproducing data is formed. is there.
- This group 3 has a constant width and periodically wobbled sidewalls.
- the record 351 formed in this data portion is referred to as “clocking record”.
- the frequency of the clocking ⁇ O table 3 5 1, as can be synchronized with the data to be recorded is set to 2 MH z 1/8 of the bit clock frequency 1 6 MH Z of data to be recorded
- the range ffl from about 200 KHz to 1 OMHz. Also, it may be in the range of 50 KHz to 1 OMHz.
- the amplitude of the clocking wobbles 31 provided on both side walls of the groove 3 is approximately 1 C) nm to 50 nm in the radial direction of the disk.
- Each track of land 4 or group 3 on the disk consists of 60 donut-shaped zones, each of which is controlled by a constant number of revolutions, so-called CAV control.
- CAV control the more the number of zones with a constant rotation speed, the more effective use of the area where data can be recorded on the disk.
- the clocking pebbles 3 51 as shown in FIG. —Because the sidewalls of Group 3 on both sides sandwiching Land 4 are wobbling in the same waveform over each of tracks 3 and 4 in the entire track, the rotation speed is within 60 zones at a constant rotation speed. Then, the wobbles with the same phase in the radial direction will be lost.
- Figure 10 shows the address segment (address section) and the data segment (data section).
- all 0 (or 1) is eventually recorded as the value of the biphase data.
- a signal obtained by bi-phase modulation of address information data is applied to the address segment, and a data having a value of 0 (or 1) is applied to the data segment by bi-use modulation.
- Each signal will be recorded as a job record.
- FIG. 11 is a diagram showing a planar structure of a disk according to the second embodiment. As shown in FIG. 11, this disk has a constant width, and in the address portion, both sides 3 ⁇ 43 ⁇ 4 are coupled in the same phase according to the address 1, 1 ⁇ , etc., and According to the address identification information, the side walls of the groups 30 and 31 ′ adjacent to each other are wobbled so that the phases thereof are opposite to each other. It comprises groups 3 O and 3 E forming 3 51.
- FIG. 12 shows the structure shown in Fig. 11 more specifically, with the address part corresponding to the address 1 for the land 1 and the address 2 for the group.
- FIG. 3 is a view showing a flat rfii structure of a disk on which a tape 173 is formed.
- addresses 1 and 2 are identified by address marks shown in FIG. This identification method is the same as the method described in the first embodiment.
- FIG. 13D is a diagram showing the format of the disk according to the present embodiment.
- one track (one round) of the disc is divided into ⁇ ⁇ ⁇ ⁇ ⁇ frames.
- each frame has a length of 2720 bytes, an address portion having a length of 96 bytes, and 2624 bytes.
- the bit density of the recorded data is 0.22 / m / bit
- the length per frame is 4.7872 mm
- it is 0.20 / z bits, it is 4.352 mm. Therefore, in the case of a 12-cm disc, which is the same as a compact disc (CD), the number of frames per track N ⁇ is about 30 to 87.
- the address section shown in FIG. 13C has a length of 96 bytes, and if the minimum 1-wobble period of the address section is defined as “1 byte”, the address on the disk having a 1-wobble cycle is obtained.
- the length ranges from 1.60 to 1.76.
- preamble ( ⁇ ) 1 and preamble ( ⁇ ) 2 each have 4 bytes
- address 1 and address 2 each have 42 bytes
- address mark ( ⁇ ) has 2 bytes
- preamble (PA) 3 And space are each given a byte on disk.
- the actual data length is 4 bits each for preamble ( ⁇ ) 1 and preamble (PA) 2, 42 bits each for address 1 and address 2, and 2 bits for address mark (AM).
- Preamble (PA) 3 and space have 1 bit each.
- the data part has a fear of 2624 bytes, of which the preamble (PA) 4 has 24 bytes, the data area has 2592 bytes, and the preamble (PA) 5) has a length of 8 bytes.
- a data area having a length of 2592 bytes is an area in which a user having a length of 2048 bytes can record and a DC component suppressing data of a recording signal having a length of 32 bytes are recorded. Area, and an area where data for error correction is recorded.
- the length of 16 bytes corresponds to one cycle of the clocking signal for generating a synchronization signal for recording and reproducing data
- the length of one clocking signal on the disk can be adjusted. That is, when the bit density is 0.22 ⁇ m / bit, it is 28.16 / zm, and when the bit density is 0.20 ⁇ m / bit, it is 25.6 / zm. Then, at this time, 164 clocking wobbles exist in the data portion in one frame. 23 P ⁇ : T / JP97 / 02 2 Therefore, if there are 60 frames in one track and the disk is rotated at 150 rpm, the clocking frequency is 2 5 5 K 1 1 z.
- a data synchronization signal for recording / reproducing data using the frequency of the cocking signal is generated by a PLL circuit.
- the length of one wobble is not limited to 16 bytes, but may correspond to a length of, for example, 4, 8, or 20 bytes.
- the frequency of the clocking pulse is different from 255 KHz; the frequency division ratio of the PLL circuit that generates the data synchronization signal may be set to an appropriate value.
- the length of the period of the clocking pulse is in the range of 5 to 50 ⁇ m.
- FIG. 14A shows the layout on the disk of the address portion shown in FIG. 13C
- FIG. 14B shows the wobble signal by reproducing the address portion
- FIG. 14C shows the content of the address information.
- Address 1 and address 2 each record 42 bits of information. As shown in Fig. 14C, each address starts with 8 bits indicating the order within one round of the track. Frame address, a 16-bit track address indicating the serial number of the entire disk track counted from the inner or outer circumference, a 4-bit synchronization signal (Sync), and a 14-bit error And one detection code (CRC). Therefore, in a format, one track can include up to 256 frames, and the entire disc can have up to 6553 tracks.
- PA 1, PA 2 and PA 3 shown in FIG. 14A are used to detect address 1, address 2 and address marks (AM (O), ((E)). Used as ambles and postambles. And the amplitude of the pebbles used to record these signals is approximately the same magnitude.
- the width ratio of the groups 3 O, 3 E and the lands 4 O, 4 E is approximately 1 to 1, and the pitch of the groups 30, 3 E is 1.0 to 1 ⁇ 28 ⁇ .
- the amplitude needs to be 15 to 150 nm.
- Signal-to-noise especially for wobble signals In order to keep the ratio within a certain range and accurately detect the address mark, a value of 25 to 70 nm is preferable.
- the method of recording the address mark and the method of identifying the address using the address mark are the same as those described in the first embodiment. However, in order to perform this identification reliably, the address mark as the address mark is used.
- the amplitude of the wobble is 30 when the ratio of the width of groups 3O, 3E to the width of land 40, 4E is approximately 1: 1 and the pitch of groups 30, 3E is 1.0 to 1.28 ⁇ m. It is preferable to take a value of ⁇
- bit error rate and margin of the address portion are improved when the 1-wobble period is equal to or more than 1.2 / im, and the reproduction can be performed with high accuracy.
- this period if this period is lengthened, the data format efficiency will decrease, so the period length must be in the range of 1.2 to 5 ⁇ m. This applies not only to magneto-optical recording media, but also to phase change disks, dye-based optical disks, and metal-based write-once optical disks.
- FIG. 15 is a diagram showing a configuration of an FT raw device for playing a disk according to the present embodiment.
- this reproducing apparatus has a configuration similar to that of the reproducing apparatus shown in FIG. 7, except that an address demodulating band-pass filter 244 connected to the amplifier 241 includes: An FM demodulation circuit 53 connected to the address demodulation band-pass filter 244; a bi-phase demodulation circuit 54 connected to the FM demodulation circuit 5; and an address decoder 57 connected to the bi-phase demodulation circuit 54.
- Comparator Comparator
- the reciprocating circuit 247 includes a frequency divider 271, a phase ratio adjuster 272, a low-pass filter (LPF) 273, and a voltage controlled oscillator (VCO) 274.
- LPF low-pass filter
- VCO voltage controlled oscillator
- the signal ( ⁇ + D) due to the reflected light detected in 3d and the signal (B + C) due to the reflected light detected in regions 113b and 113c are input to the amplifier 241, and the difference between them is calculated.
- the signal [(A + D)-(B + C)] shown is from the amplifier 24 1 to the LPF 242, the narrowband bandpass filter 256 for detecting a pebble, and the bandpass filter 24 for address demodulation.
- the signal [(A + D) 1-1 (B + C)] supplied to the narrow-band bandpass filter 2556 for the detection of a wobble has its high frequency component and low j wave number component cut, and 16 ⁇
- the waveform 17 5 by the clocking clock 35 1 formed in the data section as shown in the figure is input to the comparator 24 5.
- the comparator 2 4 5 binarizes the input waveform 1 7 5 and determines the points T 1, T 2, and T n at which the base axis BL is cut from bottom to top as shown in Fig. 16 ⁇
- the converted ⁇ sign is supplied to the PLL circuits 2 4 6 and 2 4 7.
- the logic circuits 246 and 247 each generate a synchronization signal shown in FIG.
- the R-phase signal generated by the PLL circuit 246 is supplied to the servo circuit 257 for controlling the rotation of the disk, and the F
- the synchronization signal generated by the PLL circuit 247 is supplied to the signal demodulation circuit as a data synchronization signal.
- one cycle of clocking cable 35 1 has a length in the range of 20 to 30 ⁇ m.
- FIG. 17 is a graph showing the change in the CN ratio of the reproduced signal and the value of the jitter with respect to the change in the amplitude when one period of the mouthpiece 351 is set to 20 ⁇ m.
- the frequency (band width) changed centering around the frequency of clocking pebbles 351 is 3 KHz.
- the CZN ratio of the reproduced signal improves and the jitter decreases.
- this graph shows the relationship when one period of the mouthpiece 351 is 20 ⁇ m, and the same relationship is obtained when 25 / m and 30 // m. Is obtained.
- FIG. 17 shows that the larger the amplitude of the clocking clock 351, the better the data reproduction characteristics are.
- the amplitude of the clocking clock 351 is increased. If it is large, the signal will leak into the reproduced data, which will have an adverse effect.
- Fig. 18 shows the crosstalk of the wobbled signal and the bit error of the reproduced data signal.
- 4 is a graph showing the results of measuring the relationship between the dots.
- the “crosstalk” indicates, for example, when the data recorded on land 4 is FT-generated, the ratio of the intensity of the reflected light from group 3 to the intensity of the R raw signal and the intensity of the raw signal. is there.
- the crosstalk needs to be less than 125 dB.
- FIG. 19 is a graph showing a change in the crosstalk with respect to a change in the amplitude of the clocking wobbles 351 and a change in the length of the wo period (wobble length).
- the ratio of the width of the group to the land is approximately 1 to 1 and the bit of the groove is 1.0 to ⁇ .28 // m
- the amplitude of the clocking wobble 35 1 to 10 to 60 nm, especially the bit density is 0.15 to 0.24 // ⁇ Nobit and the wobble length is 10 to 3 2
- the amplitude is desirably set to 10 to 40 nm.
- the wobble length be a value in the range of 5 to 50 / m and the amplitude be in the range of 10 to 60 nm.
- the above-mentioned clocking table 35 1 controls the rotation of the disk and is effective as a reference for generating a synchronization signal for recording and reproducing data. It can also be used for methods. That is, when recording data, the rotation of the disk is controlled so that the clock signal synchronized with the data and the clock signal reproduced from the clocking clock 351 on the disk are synchronized. When reproducing the data, it is possible to read out the reproduction data in synchronization with the clock signal reproduced from the clocking table 351 on the disk or in synchronization with the clock signal manually input from the outside.
- the beam spot is controlled at the center of the land 4 in the same manner as when the beam spot is controlled at the center of the force glove 3.
- the push-pull signal obtained by irradiating the single spot 12 can be obtained by reproducing a wobble signal corresponding to the waveform formed on both side walls of the group 3.
- both the rotation control of the disk and the detection of the address information can be performed for both the dub 3 and the land 4. It can be done in this.
- Forming the clocking table 351 on a disk causes another problem in data reproduction.
- the direction of polarization of the reflected light of the laser beam irradiated for data reproduction is affected by the clocking pulse 351, so that it is not possible to accurately reproduce magnetically recorded data. .
- FIG. 20 is a diagram for explaining data reproduction in a portion where the clocking cable 351 is formed.
- the clocking wobbles 3 51 formed on both side walls of group 3 are the same thread, so that beam stubs 1 and 2 are irradiated to group 3.
- the reflected light is not a polarized wave due to the magnetization of the original data, but the clocking wobbles formed on both side walls of group 3: the direction of group 3 determined by 3 51, ie, the arrow 3 5 It will have a polarized wave component in the same direction as 3.
- the reflected light due to the irradiation of the beam spot 13 has a polarized wave component in the same direction as the arrow 355 indicating the direction of the group 3 at that position.
- the clocking signal 351 as shown in FIG. 20, is formed on the disk, and the polarization of the original recorded data is affected by the influence of the clocking signal 351. Since the wave components are folded, the data raw characteristics are reduced, and as a result, the recorded data cannot be generated accurately.
- FIG. 21 is a plan view showing the structure of the clocking wobbles 351 formed on both side walls of the group 3.
- the clocking pebble 351 has the same phase and a waveform of a wavelength W and an amplitude h / 2 (hereinafter, “h” is also referred to as a pebble amplitude).
- Table 1 shows the leakage amount when the wavelength W is changed in the range of ⁇ 0.5 to 10 m and the cobble amplitude h is changed in the range of 3 to 50 nm.
- the leakage amount is less than 25 dB in the frame. That is, the wavelength W is 0.5 to 10 / m and the cobble amplitude h is 3 to 20 nm, or the wavelength W is 0.5 to 0.8 / xm, 5 to: l O / m In addition, in the range where the cobble amplitude h is 25 nm or the wavelength W is 10 / zm and the cobble amplitude h is 35 n, the leakage amount is less than or equal to 25 dB.
- the bit error rate force is less than S 1 X 10 11 .
- the wavelength W preferably takes a value in the range of 1.2.5.0/zm, more preferably in the range of 1.6-0.0 ⁇ m.
- Table 1 Table 2, amount with leaks - in 25 d B below, and the size of the clocking ⁇ O Bull 35 1-bit error, single bets can be realized following 1 X 1 0- 4, the wavelength W is in the range of 0.810 / m and the cobble amplitude h is in the range of 5 20 nm, or the wavelength W is 0.8 ⁇ , 5 10 / zm and the cobble amplitude h is 25 nm, or The wavelength W is 10 ⁇ m and the wobble amplitude h is 35 nm. It should be noted that the values of the wavelength W and the pebble amplitude h can be applied to the case where the clocking pebble 3 51 is formed on one of the side walls of the group 3.
- the address signal is recorded as pits on the disc, but the pit length is extremely short. Miscounting.
- the disc according to the second embodiment not only the address information but also information for generating a data synchronization signal is recorded as a wobbles, not as a pit. Lives can be performed reliably.
- some conventional minidiscs form a wobble with a frequency-modulated signal after bi-phase modulation of an address signal.
- the C / N ratio of the carrier signal is reduced, and the bandwidth is increased because the address signal is recorded as a frequency-modulated signal. Is difficult to generate from the carrier signal.
- the band of the band-pass filter 256 for obtaining the double signal is input to the PLL circuits 24 6 and 24 7. If it is necessary, it is sufficient if it is the bandpass filter of Narrow Castle 2 5 6. For this reason, the actual signal-to-noise ratio is improved even if the amplitude of the quasi-cobble 351 is small and the CZN ratio is slightly worse. Therefore, a signal with little jitter can be input to the PLL circuits 246 and 247, and a synchronizing signal for recording and reproducing data can be accurately generated. Also, since the address information and the data are recorded in different places on the disc, it is possible to avoid adverse effects on the reproduction data and access performance of the address information.
- FIG. 22 is a diagram showing a planar structure of the disk according to the present embodiment. As shown in Fig. 2, this disk has a pair of wobbles 210 formed in the address area for land 4 and group 3 and two data groups in the data area adjacent to the address area. A clocking wobble 3 51 is formed on the wall. Where wobbles 2 1 () Is modulated by one piece of address information, the wavelength of which is shorter than the wavelength of the coupling gable 31 and is formed only on one side of the group 3. Also, the cobble 210 serves as an address for the land 4 and an address for the groove 3 river.
- Such a disc is generated by the reproducing device shown in FIG. 15 above, and at the time of reproduction, the laser beam reproduces the wobble 220 and the address of the land 4 or the group 3 is detected. Thereafter, a clocking signal 351 is generated together with the data in the data portion by the laser beam, and a data synchronization signal is generated from the detected waveform signal.
- FIGS. 23A to 23D are diagrams showing the format of the disk according to the present embodiment. As shown in Fig. 23D-23D, this format is similar to the format shown in Fig. 13D-13D, except that one frame is 2688 bytes long. And has an address portion having a length of 64 bytes and a data portion having a length of 26 24 bytes.
- the data is recorded / reproduced as a magneto-optical signal mainly using NRZI modulation or (117) modulation in the data part.
- the bit density of the data to be recorded is 0.22 ⁇ m / bit
- the length per frame is 4.73088 mm, 0.20 / zm / bit.
- the address part has a length of 64 bytes, and if the minimum one wobble cycle of the address part is one byte, the length of the one-year-old cycle on the disc is 1 byte. It is in the range of 1.60 to .76 ⁇ m.
- the length of the address part on the disk is 8 bytes for ⁇ 1, 48 bytes for address, 2 bytes for address mark (AM), 4 bytes for ⁇ 2, and 2 bytes for space. have.
- the actual data length is 8 bits for PA1, 4 bits for PA2, 48 bits for address, 2 bits for end address mark, and 2 bits for space. It has a kit.
- the data section has a length of 26 24 bytes, ⁇ 3 having a length of 24 bytes, and a data portion having a length of 2592 bytes. Area and ⁇ 4 with a length of 8 bytes.
- 2592 bytes of the data area is 2 bytes as an area that can be recorded by the user.
- the PLL circuit generates a data synchronization signal for recording and reproducing data using the frequency of this pebble.
- the data synchronization signal is 3.2.256 MHz
- the frequency division ratio in the PLL circuit is 1/128.
- the length of one wobble is not limited to 16 bytes, and for example, a 4-byte or 8-byte length can correspond to a 20-byte length.
- the frequency of the cobbles will be the same as the above 252 KHz, and the division ratio set in the PLL circuit will also be a different value.
- the period length of the mouthpiece is in the range of 5 to 50 / m.
- the amplitude of the clocking signal is preferably large in consideration of the signal-to-noise ratio of the reproduced signal, but in the case of a magneto-optical recording medium, as shown in FIGS.
- the wobble signal leaks into the reproduced data, which has an adverse effect.
- the amplitude of the clocking clock must be 1 in order to perform accurate data reproduction. If the bit density is 0.15 to 0.24 ⁇ / bit and the length of one wobble is 10 to 32 ⁇ m, the amplitude of the wobble is 0 to 60 nm. It should be 10 to 40 nm.
- phase change discs dye-based or metal-based write-once optical discs
- the length of one wobble be 5 to 50 ⁇ m and the amplitude be 1 () to 60 nm. .
- FIG. 24 shows the layout in the address portion of the disk according to the present embodiment
- FIG. 24B shows the wobble signal obtained by reproducing the address portion
- FIG. 24C shows the contents of the address.
- the address is 48-bit information
- the frame address indicating the I-request number in one round of the track and the order from the outer circumference or outer circumference of the track of the entire disk are shown. This includes the track address indicated.
- the frame address is assumed to be 10 bits of information
- one track can include a maximum of 104 frames on the format.
- the track address is 20 bits of information, so that the format can include a maximum of 104,576 tracks on the entire disc.
- a bi-phase code In the coding method of these address information, a bi-phase code, a Manchester code, an NRZ, an NRZI code and the like are used.
- this one address is data of two adjacent tracks such as a group 3E and a land 4E. Shared in playback.
- ⁇ ⁇ , and ⁇ ⁇ 2 are used as a preamble or a postamble for accurately detecting an address or an address mark ( ⁇ ⁇ ).
- the amplitudes of the wobbles formed for recording these signals are substantially the same. If the ratio of the width of groups 3 O, 3 E to the lands 4 E, 4 O is approximately 1: 1 and the pitch of groups 3 O, E is 1.0-1.28 // m, the amplitude of the cobbles is It is necessary to set it to 15 to 150 nm. In particular, a value of 25 to 90 nm is preferable in order to secure the signal-to-noise ratio of the wobble signal and accurately detect the address mark.
- the address mark identifies whether the reproduced address corresponds to the data recorded in lands 4E and 4O or to groups 30 and 3E. It is used to indicate the start of recording and playback of data. To ensure the above identification, the width ratio between the groups 30 and 3E and the lands 4E and 4O is approximately 1 to 1, and the pitch between the groups 30 and 3E is 1.0 to 1.0. In the case of 1.28 ⁇ m, the amplitude of the cobbles must be 30 to 200 nm. In particular, values within the range of 60 to 150 nm are preferred.
- the wobble period is 1.2 ⁇ m or more, the bit error rate margin of the address portion is improved, and the reproduction can be performed accurately.
- this period is lengthened, the data format efficiency decreases, so the period length needs to be 1.2 to 5; um. This applies not only to magneto-optical recording media but also to phase-change disks, dye-based or metal-based write-once optical disks.
- FIG. 25 is a diagram showing a planar structure of the disk according to the tree embodiment. As shown in FIG. 25, in this disc, in the address portion, a side wall of one of the grooves 3 is superimposed with a cobble 200 modulated by one piece of address information on the covable cobble 3 51. It was something that was wobbled.
- the laser beam reproduces the wobble 200, and the detected address is used as an address for the lands 4 and the group 3 on both sides thereof. Also, in such a disc, the synchronization signal of the data to be reproduced is reproduced by the playback signal 351 shown in FIG. Generated by the device.
- FIG. 26 is a diagram showing a planar structure of a disk according to Embodiment 5 of the present invention.
- a cooking cable 35 1 is formed only on one side wall in the data part, and a disk 210 with only one address information is formed in the address part.
- Clocking pebbles 3 5 1 The groove 3 is formed subsequently. Therefore, one side wall 350 of the groove 3 is not formed with a wobble over both the address portion and the data portion.
- Such a disc is also subjected to data reproduction by the reproducing apparatus shown in FIG. 15, and a data synchronizing signal is generated by a clocking table 351 formed in the data section. .
- FIG. 27 is a diagram showing a flat ⁇ structure of a disk according to Embodiment 6 of the present invention. As shown in FIG. 27, this disc has a clocking cable 351, which is formed on both the address and data portions on one side wall, and the other side wall has A groove 3 in which a groove 2 1 () corresponding to one piece of address information is formed only in the address section.
- the sidewall on which the wobble 210 according to the address information is formed is not wobbled in the data portion.
- Such a disk is also reproduced by the reproducing apparatus shown in FIG. 15, and a data synchronizing signal is generated by a clocking table 351 formed in the data section.
- FIG. 28 is a diagram showing a planar structure of the disk according to Embodiment 2 of the present invention. As shown in FIG. 28, this disk has a group in which a wobble 50 formed by frequency modulation of address information is formed on one side wall, and a mouthpiece 351 is formed on the other side. 30 0, 3 ⁇ .
- the clocking clock 351 has a frequency of 3 ⁇
- the clock 50 has a frequency of 281.25 to 375 5. ⁇ ⁇ .
- the clock 50 and the clocking clock 351 are formed on both side walls of the groups 30 and 3 over the entire area, respectively.
- FIG. 29D is a diagram showing the format of the disk according to the present embodiment. It is.
- the address information per sector is composed of 4 bits of synchronization pattern (Sync), 24 bits of frame address, 4 bits of reserved area (RVd), and 4 bits of error area.
- Error Correction Code (ECC) Contains 12 bits of information.
- one sector includes a data area having a length of 2 kB, the address information consisting of 44 bits indicates an address for data of 2 kB. Become.
- one clocking cable 351 is formed for one byte of data, that is, as shown in FIGS. 29C and 29D, 281.16 clocking cables are formed per sector.
- the clocking table 351 is used as a standard for generating a data synchronization signal used for data recording and PT-production.
- the push-pull signal shown in FIG. 30 is obtained.
- the groove 3E and the land 4E shown in FIG. 28 are run with a laser beam.
- the signal shown in FIG. 30 is supplied to the narrow band-pass filter for pebble detection 256 and the band-pass filter for address demodulation 244 shown in FIG.
- the push-pull signal supplied to the narrow band band-pass filter 2556 for the cobble detection only the high frequency components corresponding to the clocking wobble 351 are extracted, and as shown in FIG.
- the indicated signal is input to the comparator 245.
- the comparator 245 binarizes the supplied signal and supplies the binarized signal to the PLL circuits 246 and 247.
- the PLL circuit 246 generates a clock signal in response to the rising timing of the input binarized signal, and the servo circuit 257 for performing disk rotation control and the like. Supply to lock distribution circuit 56.
- the PLL circuit 247 generates data synchronization in response to the input 2ilffi signal, and supplies it to the signal demodulation circuit.
- the address demodulation band-pass filter 244 extracts only low frequency components from the input push bull signal, and supplies a signal corresponding to the wobbles 50 shown in No. 30 to the FM demodulation circuit 53 I do.
- the FM demodulation circuit 53 FM-demodulates the input signal shown in FIG. 30B in synchronism with the clock signal supplied from the clock distribution circuit 56, and sends it to the bi-use demodulation circuit 54.
- DOO 'M and ⁇ supplies the demodulated signal
- biphase demodulation circuit 5 4 a signal inputted in synchronism with the clock signal supplied from the clock distribution circuit 5 6
- biphase demodulated ⁇ address decoder 5 7 And supplies the bi-phase demodulated signal.
- the address decoder 57 outputs the address to the system controller 268 in synchronization with the clock signal supplied from the clock distribution circuit 56.
- the disk of the tree embodiment it is possible to accurately generate a squeezing wobble 35 1 car data synchronization signal formed on one of the side walls of the groups 30 and 3 ⁇ , and to reduce leakage due to the wobbles. A raw data signal with little data can be obtained.
- an actual disk has some warpage, and when an attempt is made to generate such a disk, the reflected light from the data recording surface of the laser beam emitted from the semiconductor laser is emitted at a slightly shifted position. Light will be emitted to detector 1 1 3. As a result, an offset occurs in the data reproduction signal. Therefore, in the present embodiment, a description will be given of a reproducing apparatus capable of correcting such an offset.Note that this offset is that the laser beam to be irradiated is not applied to the center of Land 4 or Group 3. This is caused by the following.
- the fine clock mark 20 is recorded at the head of each of the address segment and the data segment. By detecting, the offset of the data re-course signal is corrected. Note that the fine clock mark 2 ⁇ shown in Fig. It is recorded at the beginning of each segment, but may be recorded in the data area.
- FIG. 31 shows a disk according to an embodiment of the present invention in which a data portion in which data is magnetically recorded has a group 3 in which a fine clock mark 20 is formed at predetermined intervals on both sides. It is a figure showing a plane structure.
- the predetermined interval shown in FIG. 31 is 50 to 300 ⁇ m, and the fine clock mark 20 force;
- the fine clock mark 20 is formed in a process of molding a master disk.
- FIG. 32 is a diagram for explaining the principle of offset correction by detecting the fine clock mark 20.
- FIG. 32 is a diagram for explaining the principle of offset correction by detecting the fine clock mark 20.
- Fine clock mark 20 is detected when the laser beam is applied to land 4 or group 3 and when the laser beam is applied to land 4 or the center of group 3, see Fig. 32 2 ⁇ .
- a detected waveform 12 1 having the same amplitude (intensity) ⁇ ⁇ and amplitude (intensity) I ⁇ is obtained.
- I 3> I as shown in FIG. 32 ⁇ ⁇ ⁇ or FIG. 32C.
- the detection waveforms 122 , 123 of I ⁇ ⁇ I ⁇ can be obtained. Therefore, by taking the difference between the detected intensity of I Alpha and intensity I beta, deviation from the center of the spot of the land 4 or Group 3 which laser beam is irradiated, i.e., the offset occurring in the data T raw signal Can be detected.
- FIG. 33 is a diagram showing a configuration of a reproducing apparatus fg according to the present embodiment. As shown in Fig. 33, this playback device is shown in Fig. 15? It has the same configuration as the regenerator, but differs in that it has an offset correction circuit 132.
- the offset correction circuit 13 2 is connected to the first peak detection circuit 13 3, the second beak detection circuit 13 4, the first peak detection circuit 13 3, and the second peak detection circuit 13 4. And an amplifier 1 37 connected to the amplifier 24 1 and the amplifier 13 5.
- the intensity of the signal-(B + C) is detected by the ⁇ 1 peak detection circuit 113, and the intensity I of the signal ( ⁇ + D) is detected by the second peak detection circuit 134.
- the detected intensity I ⁇ and the intensity I ⁇ are compared with each other ( ⁇ ⁇ — ⁇ ⁇ ) by the amplifier 135.
- the signal (A + D) and the signal (B + C) are input to the heater 241 and the difference [( ⁇ + D) — (B + C)] is obtained.
- the difference amplifier 1 3 7 [( ⁇ + D ) - (B + C)] and the difference ( ⁇ ⁇ - ⁇ ⁇ ) is added, is output to the LPF 242. Such an operation corrects the offset of the tracking error signal.
- the laser beam can always be applied to the center of the land 4 or the center of the group 3, so that more accurate data reproduction can be realized.
- the offset correction circuit 132 corrects the offset of the tracking error signal so that the laser beam is irradiated to the land 4 or the center of the group 3.
- the data can be recorded in a regular box. Note that, in this case, the configuration of the recording device in the river is the same as the playback device shown in FIG.
- both side walls 1 90 and 191 of the group 3 are not wobble, but as shown in FIG. Are in phase and constant period W.
- a disk in which a fine clock mark 20 is formed on a track that has been moved can be similarly considered.
- the wobble of the side walls 190 and 191 is a data portion;
- the fine clock mark 20 is a pebble with a higher frequency than the clocking pebble 351, and the interval W, of the fine clock mark 20 is 5 C) to 300 ⁇ m.
- the ratio W sZW i between the length W 2 and the interval of the territory in which the fine mouth mark 20 is formed is assumed to satisfy 130 () to 150.
- FIG. 35 is a diagram showing a planar structure of a data part in the disk according to the present embodiment.
- the data portion of the disk according to the present embodiment has a clocking cable 351 formed only on one side wall 190 and both side walls 19. 0 and 191 include a groove 3 in which a fine clock mark 20 is formed.
- the [? ⁇ ] interval W of the fine clock mark 20 is constant in the range HI of 50 to 300 / m, and the length W 2 of the area where the fine clock mark 20 is formed is questionable. Separation W, and the ratio W 2 / W, 1 no 300 ⁇ :! No. 50 is satisfied.
- FIG. 36 is a diagram showing a flat structure of the disk according to the present embodiment.
- this disc has fine clock marks 20 formed at predetermined intervals on both side walls 190, 191, and address information m, n , 1 are recorded, only one side 19 1 is provided with a dull 3 which is probed according to address information n.
- the interval W between the fine lock marks 20 and the length W 2 of the region where the fine lock mark ' ⁇ 0 is formed are the same as in the above-described embodiment 10.
- the address information n recorded as a wobble on one side wall 19 1 of one side of the group 3 is used as address information for the lands 4 and the group 3 on both sides of the wobble.
- the disk according to the present embodiment eliminates such a
- FIG. 37 is a perspective view showing the structure of the disk 10 according to the tree embodiment.
- the disk 10 has a structure in which a magnetic film 2 is formed on a transparent substrate 1 made of polycarbonate, glass, or the like.
- the magnetic film 2 includes a reproducing layer made of GdFeCo and the like and recording waste made of TbFeCo and the like.
- the disc 10 also has a group 3 and a land 4, and both sides of the group 3 have 180 phases with each other.
- a different pebble 5 is formed. That is, the knob 5 is formed such that the width of the group 3 or the land 4 changes at a predetermined cycle with respect to the scanning / direction of the laser beam.
- FIG. 38 is a diagram showing a plane structure of the disc 10.
- the disc 10 includes an address portion 700 and a data portion 701, and a disc 3 has both side portions of the address portion 700 and the data portion 701, and two side walls. Bull 5 is formed.
- the wavelength and amplitude of the pebble 5 will be described with reference to FIG.
- the wavelength W of the pebble 5 is in a range 1 of 0.8 to 20 ⁇ m, preferably in a range of 1.2 to 5 ⁇ m.
- the amplitude hZ2 of the pebble 5 is in the range of 5 to 100 nm, and preferably in the range of 10 to 3 nm.
- the data synchronizing signal used for data recording / reproduction is generated by the wobble 5 formed in the data section 701.
- the group 3 included in the disk 10 according to the present embodiment has, on the address portion 700, both sides of the group 3 according to the address information, as shown in FIG. It is coupled to be symmetric about the center line.
- the address information is specifically recorded by, for example, a bi-phase modulation method.
- a bi-phase modulation method With reference to FIGS. 40A to 40D, recording of the address information by this method will be described. .
- the wobble waveform formed on one side wall of group 3 in the address portion becomes a waveform 44 shown in FIG. 40D, and the wobble waveform formed on the other side wall of group 3 is shown in FIG.
- the waveforms 44 and 45 are symmetric with respect to the center line 48 of the group 3.
- FIG. 41 is a diagram showing a planar structure of an address portion in which addresses G0 to G3, 1, and L2 are recorded.
- a wobble 61 and a wobble 62 are formed on one side wall of the group 31 included in the address portion, and the other wobble of the group 31 is formed on the other side wall.
- a pebble 6 3 is formed symmetrically with the pebble 6]
- a pebble 6 4 is formed symmetrically with the pebble 62.
- wobbles 6 1 and 6 5 are formed, and on the other side wall, the wobbles 6 1 and 6 5 are symmetrical with the wobbles 6 1 and 6 5.
- 6 3 and wobble 66 are formed.
- the wobble 67 and the wobble 65 are formed on one side wall of the group 33, and the wobble 67 and the wobble 67 are formed on the other side wall of the group 33 with respect to the center line of the group 33.
- the wobbles 68 and 666 are formed symmetrically with 65.
- the address portions of the group 31 correspond to the wobbles 6 1 and 6 3 formed on both side walls.
- the address G0 is recorded corresponding to the address G1 and the wobbles 62, 64, respectively.
- the address G1 and the address G2 are recorded in the address section of the group 32.
- the address G3 and the address G2 are recorded in the address section of the group 33.
- the address information of the groups 31, 32, 33 or the lands 46, 47 is obtained from the waveforms of the wobbles 6 to 68 formed on both side walls thereof. Because of P (rr / JP97 / 02442, address G1 and address L1 and address G2 and address L2 are the same information.
- FIG. 42 is a diagram showing a format of address information recorded in an address portion of the disk according to the present embodiment.
- the address section has an area of 96 data bytes, and the data amount of the address section is 9 () bits.
- the length corresponding to one bit in the address part is eight times the length of the recording bit. For example, when the good bit of one bit to be recorded is 0.22 ⁇ r, the data in the address part is The bit length corresponds to 1.76 ⁇ m.
- the address section consists of a preamble ( ⁇ ) with a length of 6 data bytes, an address 1 with a length of 42 data bytes, an address 2 with a length of 42 data bytes, an A pattern with a length of 2 data bytes, Includes an address mark ( ⁇ ) of 2 bytes in length.
- address 1 is a 4-bit first synchronization signal (SYNC 1) 92, an 8-bit frame address 93, a 16-bit track address 94, and a 14-bit error signal. Includes detection code (CRC) 95.
- Address 2 is composed of a 4-bit second synchronization signal (SYNC 2) 97, an 8-bit frame address 98, a 16-bit track address 99, and a 14-bit. Including CRC103
- the preamble ( ⁇ ) 91 has the signal (1 0 1 01 0 10 1 3 1 0)
- the first synchronization signal 92 has a signal of (111)
- the reserved area (R ev) 96 has a signal of (110)
- the second synchronization signal 97 The signal of (1 0 0 0 1 1 1 0) is in the signal
- the signal of (1 0) is in the A pattern 101
- the signal of (1 1 0 0) is in the address mark ( ⁇ ) 102.
- FIG. 43 is a diagram showing a configuration of a force-setting device for generating a disk according to the present embodiment. As shown in Fig. 43, this cutting device generates a laser beam with a wavelength of 633 nm for the focus servo. A neon laser 166 and a laser beam of 458 nm are used.
- a laser noise reducing circuit 161 which is connected to an argon laser 160, which is connected to the argon laser 160, and removes laser beam noise
- a laser noise reducing circuit which is connected to the laser noise reducing circuit 161
- EO (Electro-Optical) modulator 162 that changes according to the input control signal, and a laser beam that reflects a 458 nm laser beam and is output from a helium-neon laser 1666
- control signal input to the EO modulator 162 determines the intensity of the laser beam, and the intensity of the argon laser is periodically changed by this control signal, as shown in FIG. 37.
- a laser beam whose intensity changes at a predetermined cycle is output from the EO modulator 16 2, and then reflected by the reflection mirror 16 4 and the objective lens 16 5 Then, it is irradiated on the glass master 1668.
- the spot diameter changes when the intensity of the laser beam irradiated on the glass master 168 changes, so that the wobble 5 shown in FIG. 37 is formed on both side walls of the group 3.
- FIG. 44 is a diagram showing an overall configuration of a reproducing apparatus for reproducing the disc according to the present embodiment. As shown in FIG. 44, this reproducing apparatus is connected to an optical head 1 12, a reproduced signal amplifier circuit 114 connected to the optical head 112, and a reproduced signal amplifier circuit 114. Signal demodulation circuit 1 18 and playback signal width circuit 1 1 4 And a PLL circuit 1 17 and a PLL circuit 1 17 connected to the pulse detection circuit 1 15 and the PLL circuit 1 17 respectively.
- the laser drive circuit 1 1 9 connected to 1 7, the servo circuit 1 1 1 connected to the no-ki width circuit 1 1 4, and the spindle motor 1 2 0 connected to the servo circuit 1 1 1 Is provided.
- the optical head 1 1 2 focuses the laser beam on the disk 10 and irradiates it, and the light detector 1 13 included in the optical head 1 12 detects the reflected light from the disk 10 I do.
- the reproduction signal amplifier circuit 114 amplifies the ⁇ -raw signal from the photodetector 113, converts the focus error signal, tracking error signal, etc. to the servo circuit 111, and demodulates the raw data signal. To the circuit 1] 8, and to the address detection circuit 1 16, and to the address detection circuit 1 16, respectively.
- the servo circuit 111 controls the optical head 112 and the spindle motor 120 based on the received focus error signal, tracking error signal, and the like. Further, the signal demodulation circuit 118 demodulates the reproduced signal modulated in a predetermined modulation method based on the synchronization signal received from the reciprocating circuit 17 and outputs it as reproduced data to an output device (not shown). Supply.
- the signal detecting circuit 115 converts the received signal into a binary signal by a comparator, and supplies the binarized signal to the PLL circuit 117. Also, the address detection circuit 116 performs a binary scan on the received signal, using a comparator, demodulates the binarized signal to detect address information, and a microcomputer (not shown).
- the shifter circuit 117 generates a synchronization signal based on the received binary signal, and supplies it to the signal demodulator circuit 118 and the laser drive circuit 119.
- the laser drive circuit 119 drives a semiconductor laser (not shown) included in the optical head 112 in response to the received synchronization signal, and converts a signal recorded on the disk 1 °. Reproduce.
- FIG. 45 is a diagram for explaining detection of a pebble 5 formed in a data portion by the pebble detection circuit 115 shown in FIG.
- the photodetector 113 has four light-receiving surfaces 113a, 113b, 113c.
- the region is divided into 1 13 d, and the regions 1 13 a and 1 13 d are arranged so that the region 1 13 b and the region 1 13 c are aligned in the same direction as the laser beam traveling direction 140. ing.
- the light intensity signal detected in the region 1 13 a and the region 113 d and the light intensity signal detected in the region 113 b and the region 113 c (B + C) Power regeneration signal
- This is input to the adder 1 151 included in the cobble detection circuit 115 via the amplification circuit 114.
- the light intensity signal added by the adder 1 151 is filtered by a band-pass filter 1152, after which noise is removed, and then binarized based on the () level by a comparator]] 53, and the binary The digitized signal is supplied to the PLL circuit 117.
- FIG. 46A is a diagram showing signals supplied to the comparators 115. Specifically, such a signal is binarized by the comparator 1153, and a binarized signal as shown in FIG. 46B is supplied to the L circuit 117.
- the PLL circuit 117 responds to the rising timing 150 and falling timing 1501 of the binarized signal shown in FIG. Generates a synchronization signal.
- the wavelength W of the wobbles 5 provided in the data section is constant and in the range of 0.8 to 20 ⁇ m, it is possible to generate a synchronization signal with a relatively short interval. The signal can be generated accurately.
- the address information recorded in the address section is also detected by the address detection circuit 116 having the same configuration as the circuit shown in FIG. 45.
- FIG. 47 is a graph showing the relationship between the wobble length and crosstalk of the disk according to the present embodiment.
- the width of the dull 3 formed on this disk is 0-6 // m, and the amplitude is 60 nm.
- the crosstalk does not increase even if the length of the pobble is shortened. At present, it has been confirmed that crosstalk does not increase until the wobble length is 0.8 // m. Therefore, by generating a synchronizing signal from the pebble 5 in which the pebble is shortened, data reproduction with excellent characteristics can be performed.
- the recorded magneto-optical recording signal (data) can be accurately reproduced. it can.
- the information created in the data section Since the wavelength of the bull is as short as 20 / m or less, a high-frequency synchronization signal can be generated, and data recorded at high density can be reliably reproduced.
- FIG. 48 is a diagram showing another embodiment of the photodetector 113 and the double detector 115 shown in FIGS. 44 and 45.
- the laser beam travels.
- the difference from the photodetector 113 and the wobble detector 115 shown in FIG. 45 is that the intensity signal ( ⁇ + ⁇ ) is manually input to the adder 115.
- Such a photodetector 13 and a cobble detector 1 15 also have the same effect as the reproduction device according to Embodiment 12 described above.
- FIG. 49 is a diagram showing another embodiment of the force setting device shown in the above-mentioned Embodiment 12.
- the cutting device shown in FIG. 49 has the same configuration as the cutting device shown in FIG. 43, except that the amplitude modulator 18 1, the modulator 81 and the laser noise reduction circuit 16 1 They differ in that they have a connected EO deflector.
- the amplitude modulator 18 1 manually inputs the carrier signal CS shown in FIG. 5 and the clock signal -CLK shown in FIG. 50B, and forms an envelope as shown in FIG. 50C.
- the line supplies a control signal MS corresponding to the waveform of the wobble 5 to the EO deflector 180.
- the laser beam repeats a reciprocating motion at a high frequency in the tracking direction, forming a pebble 5 on both side walls of the group:!.
- FIG. 51 is a diagram showing another embodiment of the cutting equipment shown in Embodiments 12 and 14 above. As shown in FIG. 51, this cutting device has the same configuration as the force cutting device shown in FIG. 49, except that a laser noise reduction circuit 16 1 ⁇ and an E ⁇ deflector 180 In addition, the laser noise reduction circuit 16 1 B, the EO deflector connected to the laser noise reduction circuit 16 1 B] 8 OB, the reflection mirror 18 3, and the input clock signal It differs in that it has an inverting circuit 18 2 for inverting.
- the above-mentioned force-setting device separates the laser beam generated by the argon laser 160 into two beams, one of which is used for a wobble to be formed on one side wall of the tube 3, and the other is for the other side of the glass 3. It is used for a wobble formed on a side wall.
- One of the EO deflectors 180B receives a clock signal for controlling the movement of the laser beam in the tracking direction, and the other EO deflector 18 () A converts the clock signal to an inverting circuit 1. 8
- the signal inverted in 2 is input. Therefore, the laser beam output from the EO deflector 180 ° and the laser beam output from the EO deflector 180B move symmetrically about the center of Group 3 as the axis. 37.
- the pebble 5 shown in FIG. 7 is formed on both side walls of the dalb 3.
- FIG. 52 is a diagram showing a flat structure of the disk according to the present embodiment.
- this disk has the same planar structure as that of the disk shown in FIG. The difference is that the in-phase wobbles 6 are formed on the wall. More specifically, an address is recorded in the address portion by a staggered method in biphasic modulation by the in-phase wobbles 6.
- FIG. 53 is a diagram showing a planar structure of the disk according to the present embodiment.
- this disk has the same planar structure as the disk shown in FIG. 38 in the above-mentioned Embodiment 12, but has one side wall 7 of the group 3 at the address portion. Are different in that they are not wobbled.
- Such a disk is formed on the other side wall 6 of the group 3 of the address section. Since the address of the land 4 and the address of the groove 3 are recorded by the obtained page, the recording density of the address information can be improved accordingly.
- FIG. 54 shows ⁇ indicating the metastructure of the disk according to the present embodiment.
- the disk has the same meta-structure as the disk shown in Fig. 8, but the Movable 8 is formed on both side walls of the groove 3 in the address part, with the center line of the groove 3 being the symmetric axis. This is a difference.
- FIG. 55 is a diagram showing a flat structure of the disk according to the present embodiment.
- this disk has FV [Poble 9 with modulated address] formed on both side walls of group 3 of address and data sections symmetrically with the center line of group 3 as the axis of symmetry.
- the address corresponding to the data recorded in the data portion is recorded by the page 9.
- FIG. 56 is a view showing the metastructure of the disk according to the present embodiment.
- this disk has the same structure as the disk shown in FIG. 52, but one of the walls of the address part group 3 has the same phase as the A fiber 220 is formed by superimposing a fiber having an opposite phase on a fiber 6 indicated by a broken line.
- FIGS. 57A-57D are diagrams for explaining the relationship between the position of the laser beam applied to group 3 and the obtained data reproduction signal.
- FIG. 57A when the laser beam is irradiated on the center line of the groove 3, that is, the beam spot 230, the data as shown in FIG. A reproduction signal is obtained.
- This data reproduction signal is a signal having a high frequency
- FIG. 57B-57D shows the envelope of the data reproduction signal.
- the envelope of the data reproduction signal is shown in FIG. 57B.
- a data reproduction signal having an envelope as shown in FIG. 57D is obtained.
- the waveform of the envelope shown in FIG. 57D is a waveform shifted by a half cycle from the waveform of the envelope shown in FIG. 57B.
- FIGS. 58A to 58F are diagrams for explaining a tracking control method for removing the leakage amount.
- FIG. 58A when the laser beam irradiates the position indicated by spot 240, a data reproduction signal ⁇ Sd having an envelope shown in FIG. 58D is obtained. Is received.
- the reproduced signal Sb of the wobble 5 formed on both side walls of the groove 3 has a waveform as shown in FIG. 58B.
- a rectangular wave Sc as shown in FIG. 58C is obtained.
- the laser beam is tracked to the center of the group by using the value obtained by subtracting the difference from the tracking signal from the tracking signal as the new tracking signal.
- the value of the difference between the magnitudes of the data reproduction signal Sd having the envelope is large in proportion to the deviation ⁇ of the position of the laser beam irradiated on the group 3 from the 'I' core of the group 3. Therefore, if the tracking signal 3 ⁇ 4- is complemented by ⁇ with the deviation, tracking can be performed on the center line of Group 3.
- FIG. 59 is a block diagram showing a complete rest configuration of the W raw device for eliminating leakage ffi by the above method.
- this S raw device has the same configuration as the playback device shown in FIG. 44, but is connected to a playback signal amplifier circuit 114 and a servo circuit 111. The difference is that a tracking sleeve correct circuit 250 for supplying a tracking signal to 1 is further provided.
- the reproduction signal detected by the photodetector 113 included in the optical head 112 is supplied to the reproduction signal-width circuit 14. Then, of the reproduced signals, the raw signal of the magneto-optical signal is supplied to the demodulation circuit 118 and the tracking correction circuit 250, and the tracking error signal is further supplied to the tracking correction circuit 250.
- the supplied focus error is supplied to the servo circuit 111, and the focus of the objective lens (not shown) is supplied to the optical head 112. Used for retraction. Further, of the raw signal, the reproduced signal of the pebble 5 formed on both side walls of the groove 3 is supplied to the pebble detection circuit 115.
- the reproduced signal Sb of the wobbled 5 shown in FIG. 58 is detected, and the reproduced signal Sb of the wobbled 5 is supplied to the tracking correction circuit 250.
- Tracking correction circuit 2 5 by the reproduced signal S b of the reproduced signal and the Woburu 5 of the supplied magneto-optical signal detecting the amount of deviation of the tracking to correct the Toratsukinguera Kazunobu according to the detected amount of deviation D
- the corrected tracking error signal is supplied to the servo circuit 111. Used for tracking the objective lens included in the optical head 1 i 2.
- FIG. 60 is a diagram showing a configuration of the tracking correction circuit 25 ().
- the tracking correction circuit 250 is composed of a synchronous detection circuit 260, integration circuits 264 and 265 connected to the synchronization detection circuit 260, and an integration circuit 2 It includes a subtractor 266 connected to 64, 265 and a calculator 267 connected to the subtractor 266.
- the synchronous detection circuit 260 includes sample-and-hold circuits 261, 262 and a double synchronous signal generation circuit 263.
- the operation of the tracking correction circuit 250 will be described below.
- the data reproduction signal Sd shown in FIG. 58D is input to the sample and hold circuits 261, 262 included in the synchronous detection circuit 260.
- the wobbled synchronizing signal generation circuit 263 compares the input reproduced signal Sb of wobbled 5 shown in FIG. 58B to generate a square wave Sc shown in FIG. 58C. I do. Then, from the square wave Sc, a first timing signal Se shown in FIG. 58E synchronized with the rising timing and a second timing signal shown in FIG. 58F synchronized with the falling timing The first timing signal S e is supplied to the sample and hold circuit 26 2, and the second timing signal S f is supplied to the sample and hold circuit 26 1.
- the sample-and-hold circuit 26 1 synchronizes with the second timing signal S f supplied from the wobbled synchronizing signal generation circuit 26 3 to generate the magnitude of the data reproduction signal S d input from the raw signal amplification circuit 1 14. Is detected, the value is held and supplied to the integration circuit 264. Similarly, the sample-and-hold circuit 26 2 synchronizes with the first timing signal Se supplied from the coaxial synchronization signal generation circuit 26 The magnitude of the reproduction signal S d is detected, and the value is held and supplied to the circuit 265.
- the integration circuits 264 and 265 integrate the supplied value and supply a signal indicating the result to the subtracter 266.
- the subtractor 266 takes the difference between the integral values of the integrating circuits 264 and 265, and inputs the result to the minus (1) terminal of the subtractor 267.
- a tracking signal used for tracking is input to the plus (+) terminal of the subtractor 267, and the subtractor 267 calculates the difference between the tracking signal and the integrated value, that is, The fluctuation width of the data reproduction signal sd is subtracted, and the result is output to the servo circuit 111 as a corrected tracking signal.
- T can the displacement of the tracking sleeve positive, which can result, removing leaking into data reproduction signal sd
- the tracking sleeve positive circuit 250 may have a configuration as shown in FIG. That is, the tracking sleeve correction circuit 250 includes a multiplier 280 and a subtractor 267.
- the multiplier 280 is supplied with the reproduced signal Sb of the wobbled 5 to be converted to the 58th B ⁇ and the data FT-raw signal Sd shown in FIG. 58D, and The result of the multiplication is output to the minus terminal of the subtractor 267.
- the subtracter 267 subtracts the result of the subtraction from the tracking signal input to the plus terminal, and outputs the result to the servo circuit 111 as the corrected tracking.
- the tracking signal is constantly corrected by the detected data reproduction signal, and the tracking control is performed based on the corrected tracking signal. ---No leakage occurs in the raw T signal.
- FIG. 63 is a diagram showing a configuration of a circuit for eliminating leakage.
- the reproduced signal input to the r terminal 70 is subjected to a band-pass filter (BPF) 71 to remove the noise, and then to a PLL circuit 7. 2 and the correction signal generation circuit 74 are supplied.
- BPF band-pass filter
- the correction signal generation circuit 74 outputs the signal of the wobble signal shown in FIG. 64 based on the information relating to the amount of leakage recorded in the TOC area of the disk 39 manually operated from the terminal 75.
- the sleeve is corrected so that its phase and amplitude are equal to the phase and amplitude of the wobble waveform of the magneto-optical signal shown in FIG. 64B, and the corrected wobble signal is supplied to the minus terminal of the subtracter 77.
- a magneto-optical signal on which the wobble waveform shown in No. 64B is superimposed is input from the terminal 76 to the brass terminal of the subtractor 77.
- the subtractor 77 subtracts the captured signal from the magneto-optical signal shown in FIG. 64B to generate a signal shown in FIG. 64C.
- the generated signal is supplied to a decoder, and after a predetermined demodulation, is taken out as a data reproduction signal.
- the correction amount to be changed is determined based on the correction amount recorded in the TOC area of the disc 39, and the error rate of the reproduced signal for each changed correction amount is detected. Then, the correction ffi that minimizes the error rate is determined, and a signal corresponding to the determined correction amount is obtained as a reproduction signal.
- FIG. 65 is a diagram showing a configuration of the leakage elimination circuit according to the present embodiment.
- the correction amount generation circuit 420 receives a persimmon correction amount based on information reproduced from the TOC area, and determines a range of the correction amount to be changed based on the correction amount.
- a reproduction signal is input from the terminal 421 to the subtractor 422, and the subtracter 422 subtracts each correction amount determined by the correction amount generation circuit 420 from the reproduction signal.
- the result is supplied to an error rate detection circuit 423, and an error rate for each sleeve is detected.
- the error rate detection circuit 4 23 determines the correction amount at which the error rate is minimum. After the determination, the reproduction signal for the determined correction amount is output from the terminal 424. In this case, the range of the correction amount to be changed is 0.3 to 3 times the correction amount.
- FIG. 67 is a view showing the f-structure of the disk 440 according to the present embodiment.
- the disk 440 has a TOC area on an inner circumference 392 and an outer circumference 391, and information on a reproduced signal is recorded on a signal recording area 445.
- the area (hereinafter referred to as “specific area”) 44 1, 4 4 3 and the area 4 42, 444 are formed as a set.
- the specific regions 44 1 and 443 have one of the following signals: [1 1 1 1 1 ⁇ ], [() 0000 ' ⁇ ], and [1 0 1 0 1 0 1 ⁇ ].
- the S- is recorded, and these signals are reproduced before the f-generation of the data signal.
- the recording of these; 1 is based on the fact that the magnetic directions are arranged in a regular manner, so that a signal equivalent to a reproduced signal when no data is recorded is obtained.
- a renewed belief with only components based on the pebbles formed on the side wall of group 3 can be noted, so that ift can be eliminated by subtracting this signal from the re-cow signal.
- FIG. 68 is a diagram showing a configuration of the leakage elimination circuit according to the present embodiment. From terminal 450, Fig. 69 shows the reproduction of one of the following signals: [1 1 1 1 1 '], [00000 ...], [1 0 1 0 1 0 1 ...] Is input and stored in the waveform memory 451.
- Fig. 69B From terminal 452, as shown in Fig. 69B— Raw signal Sh is input to the plus terminal of subtractor 453, and in synchronism with this, the waveform is sent to the minus terminal of subtractor 453.
- the reproduction signal Sg shown in FIG. 69A is input from the memory 451.
- the subtractor 4553 subtracts the reproduced signal Sg shown in Fig. 69 9 from the input reproduced signal Sh shown in Fig. 69B, and the subtracted signal is obtained as shown in Fig. 69C without leakage.
- the indicated signal S i is output to terminal 4 5 4. This signal is supplied to a decoder, and a data reproduction signal is obtained.
- the leakage amount was detected by recording the signals [1 1 1 1 1 ''], [00000 ⁇ -], [1 0 1 0 1 0 1 ⁇ ].
- the leakage amount can be detected in the same manner by aligning the magnetization of the reproducing layer of the disk in one direction by means of applying an external magnetic field such as a magnetic head.
- FIG. 70 is a diagram showing a configuration of a leakage elimination circuit according to the present embodiment.
- the playback signal input to terminal 470 is A / D converted by A / D converter 4 It is supplied to the subtractor 47 and the synchronous detection circuit 472.
- the synchronous detection circuit 472 detects a raw signal having a wobble waveform shown in FIG. 71 from the supplied reproduced signal, and supplies the raw signal to the adder 473.
- the heater 473 adds the regenerated signals for one wavelength in a range of 100 to 10000 times and averages them. Then, the result is supplied to the waveform memory 474.
- the ⁇ raw signal after the AZD conversion is manually input to the brass terminal of the subtractor 475, and in synchronization with this, the averaged signal from the waveform memory 474 is input to the minus terminal. Is done.
- the subtractor 475 eliminates leakage by subtracting the averaged signal from the input raw signal i.
- 72 to 72D are waveform diagrams for explaining the principle of the leakage erasure method according to the present embodiment.
- a waveform B0 shown in FIG. 72A represents a signal of 4 bytes
- a waveform CO shown in FIG. 72B represents a signal of the next 4 bytes.
- the waveform A0 shown in FIGS. ⁇ 172 ⁇ and 72 ⁇ represents a pebble waveform caused by a pebble formed on the side wall of group 3.
- the waveform 0 is subtracted from the waveform B0 shown in FIG. 72A to obtain the waveform shown in FIG. 72C.
- a waveform CO0 is added to a waveform CO shown in FIG. 72B to obtain a waveform shown in FIG. 72 ⁇ ).
- twice the amplitude of waveform AO (hereinafter, twice the amplitude is referred to as “full amplitude”) is A 1
- the full amplitude of waveform B 0 is B 1
- the full amplitude of waveform C 0 is C 1
- the full amplitude of the waveform shown in FIG. 72C is B h and the full amplitude of the waveform shown in FIG.
- FIG. 73 is a diagram showing a planar structure of the disk according to the present embodiment.
- this disk 540 is divided into n zones 54 1,..., 54 ⁇ from the inner circumference toward the outer circumference.
- the number of sectors included in each zone is not limited to the same number and is determined so that the information recording density is maximized.
- FIG. 74 is a perspective view 1 showing the structure of a disk 54 # according to the present embodiment.
- the disk 54 () is composed of a group 55 1 having a pebble 55 3 formed on one side wall and groups 55 1, 55 55 adjacent to the group 55 1.
- ⁇ ⁇ 554 and the group 555 are formed alternately and repeatedly following the group 551.
- FIG. 75 is a diagram showing the meta-structure of the disk 540 shown in FIG. As shown in FIG. 75, in the plan view, the disk 540 is formed such that the group 551 and the land 552 have a pebble 553 on one of the side walls, and the group is subsequently formed.
- the non-formed region 554 is formed repeatedly in the -constant interval 561 ⁇ .
- each of the sectors 5 4 11 1, 5 4 1 2, 5 4 1 3,... shown in Fig. 73 forms a group 5 51 with a prefix 55 3, followed by Thus, it has a structure in which 43 regions 554 are formed.
- the length 5 61 of the group 55 5 ranges from 50 to 150 ⁇ m, and the length 56 2 of the region 55 4 ranges from 0.5 to 4 ⁇ m.
- the length 563 of the group 5551 is the same as the length 561 of the group 5.55.
- the total amplitude of the pebble 553 is in the range of 60 to 150 nm.
- the disk 540 has a structure in which groove and land address information are recorded by bi-phase modulation as a pebble 553, and areas 554 are formed at regular intervals. It is characterized by the following.
- the pebble 55 3 is grouped with the land 55 2 located on either side of it.
- the area 554 has a meaning as address information common to 551, and is used to generate a synchronization signal used for recording or reproducing a data reproduction signal.
- the laser beam scans from the outer periphery to the inner periphery of the disk 540 in order, and the period until the laser beam reaches the area where the sectors 54 11, 54 1 2, 54 13,.
- a region 554 that appears in the image is detected, and a synchronization signal is generated from a signal obtained by detecting the region 554.
- wobbles 553 are formed on one side wall of the group 551, but may be formed on both side walls.
- the disk 540 is not limited to a magneto-optical recording medium, but may be any recording medium having a similar structure.
- FIG. 76 is a block diagram showing a configuration of an apparatus for recording or reproducing data on disk 540 according to the present embodiment. As shown in FIG. 76, this data recording / reproducing apparatus has the same configuration as the reproducing apparatus shown in FIG. 44, but has a magnetic head 570 and a magnetic head drive circuit. 5 7 1 and a signal format circuit 58 6.
- a laser beam having a wavelength of 6 50 nm (permissible error ⁇ 15, the same applies hereinafter) is applied to the disk 540, and the reproduced signal and error signal obtained by the optical reproduction in the area 554 are converted into a reproduced signal amplifier circuit. Supplied to 1 1 4 Then, after these signals are amplified by the raw signal amplifying circuit 114, the error signal is supplied to the servo circuit 111, and the reproduced signal is supplied to the synchronizing signal generating circuit 577, respectively.
- FIG. 77 is a view for explaining light regeneration of the area 554 by the photodetector 113 included in the optical head 112.
- the photodetector 113 has its light receiving surface divided into four regions 113a, 113b, 113c and 113d,
- the radial direction of 540 is arranged as indicated by arrow 589, and the tangential direction is indicated by arrow 590.
- the reflected light from the disk 540 is detected in each of the four regions 113a, 113b, 113c and 113d, and is detected in the regions 113a and 113d.
- the signal (B + C) generated by the PC is input to the adder 587.
- the adder 587 adds the signal ( ⁇ + D) and the signal (B + C), and uses the result as a reproduced signal of the territory castle 554 via a terminal 7-588 to reproduce the signal (! Supply to 4.
- the reproduced signal of the area 554 may be obtained as a signal obtained by subtracting the signal (B + C) from the signal ( ⁇ + D).
- FIG. 78A is waveform 1 showing Fi raw signal S 1 in region 554. As shown in Fig. 78, when the area 554 is irradiated with a laser beam in the period T1 to T2, the intensity of the reflected light increases, and the reproduced signal reaches its maximum during this period. Are obtained at predetermined intervals.
- the reproduced signal S1 having the waveform shown in FIG. 78 is used for optically reproducing not only the groups 551 and 555 but also the land 552. Can also be obtained.
- the focus error signal is obtained from the signal (A + C) obtained by detecting the reflected light in the regions 13a and 113c, and the focus error signal in the regions 113b and 113d.
- the signal obtained by detecting the reflected light (R + D), the tracking error signal is the signal (A + D) from the signal (B + C), and the subtracter (not shown). It is obtained by subtraction and supplied to the reproduction signal amplification circuit 114.
- the reproduction signal amplification circuit 114 separates the raw ffi signal from the supplied area 554 reproduction signal, tracking error signal, and focus error message M ", supplies the separated signal to the synchronization signal generation circuit 577, and performs tracking.
- the error signal and the focus error signal are supplied to the servo circuit] 1].
- the synchronization signal generation circuit 577 generates a synchronization signal from the supplied raw signal of the area 554.
- FIG. 79 is a view for explaining generation of a synchronization signal in the synchronization signal generation circuit 577.
- the synchronization signal generation circuit 577 includes a comparator 601, a PLL circuit 602, and a clock generation circuit 603. Re-input of the area 554 shown in Fig. 78 input to the comparator 601 via the terminal 600
- the raw signal SI is compared with the reference voltage by the comparator 601, and the signal S 2 shown in FIG. S78B is supplied from the comparator 601 to the PLL circuit 602.
- the PLL circuit 602 supplies the timing signal TS shown in FIG. 78C synchronized with the rising of the input signal S2 shown in FIG. 78B to the clock generation circuit 603.
- the clock generation circuit 6 () 3 generates a synchronization signal CLK having a predetermined frequency shown in FIG. 78D in response to the input timing signal TS, and outputs the control signal via the terminal 604 to the servo circuit 1 1 1. 581 and the signal format circuit 586.
- the synchronization signal CLK shown in FIG. 78D is a signal in which 544 clocks exist in the timing signal TS shown in FIG. 78C.
- the laser beam reaches the sectors 54 1 1, 54 1 2, 54 13 ... of the disk 540, and is recorded as a pebble 553 at the beginning of each sector.
- the detected address information is detected.
- the address information is recorded by biphase modulation with the waveform 610 shown in FIG. 80A as "1" and the waveform 611 shown in FIG. 80B as "0". Therefore, for example, a wobble waveform in which the address information of [101 01 0 10] is recorded is a waveform 6 12 shown in FIG. 80C.
- FIGS. 81A, 81B, and 82 are diagrams for explaining detection of address information recorded as a pebble 553.
- the photodetector 1 13 included in the optical head 112 is the same as that shown in FIG. 77, and the signal ( ⁇ + D) and the signal (R + C) is input to the subtractor 630.
- the subtracter 630 subtracts the signal (B + C) from the signal ( ⁇ + D), and supplies the result to the reproduction signal amplifier circuit 114 via the terminal 631 as a reproduction signal of the cable 553. Accordingly, for example, with respect to the waveform 612 shown in FIG. 8 () C, the reproduced signal SA1 shown in FIG. 81A is supplied to the reproduced signal amplifier circuit 114.
- the reproduction signal amplifier circuit 114 outputs the supplied regenerated signal to the address output circuit 578.
- FIG. 83 is a diagram for explaining the address detection circuit 578.
- the address detection circuit 578 comprises a comparator 641 and an address decoder 642.
- the reproduced signal SA 1 shown in FIG. 81 which is manually input through the terminal 64 0 is compared with the standard voltage by the comparator 641, and is shown in FIG. 81 B.
- This 2ff conversion ⁇ S ⁇ 2 is input to an address decoder 642, and an address decoder 642 converts the binarized signal S ⁇ 2 from this binarized signal.
- the address information of [101] is read, and the address information thus detected is supplied to the control circuit 581 via the terminal 643.
- the servo circuit 111 rotates the spindle motor 120 at a predetermined number of rotations in synchronization with the synchronization signal CLK shown in FIG.
- the tracking lens control and the force sensor control of the objective lens included in the optical head 112 are performed by the focus error signal.
- control circuit 581 supplies the synchronization signal CLK shown in FIG. 78D to the timing setting circuit 583 based on the address information input manually from the address detection circuit 578.
- the timing setting circuit 583 includes a first timing pulse for pulsing a laser beam generated by the semiconductor laser included in the optical head 112 and irradiating the laser beam to the disk 540, A pulse magnetic field is applied to the disk 540 by the magnetic head 570, and the duty ratio for switching the SZN pole and the second timing pulse for determining the application timing are synchronized with the synchronization supplied from the control circuit 581. Generated in response to signal CLK.
- the first timing pulse is supplied to a duty correction circuit 582, and the second timing pulse is supplied to a magnetic head drive circuit 571.
- the first timing pulse is the second timing pulse.
- the signal format circuit 586 formats data to be recorded in synchronization with the synchronization signal supplied from the synchronization signal generation circuit 577, and supplies the data to the magnetic head drive circuit 571.
- the magnetic head drive circuit 571 calculates the logical sum of the second timing pulse supplied from the timing setting circuit 583 and the data signal supplied from the signal format circuit 586, The magnetic head 570 is driven based on the calculation result to record data.
- the duty correction circuit 582 supplies the first timing pulse supplied from the timing setting circuit 583 to the laser drive circuit 1 19 with a predetermined duty for turning on or off the laser beam.
- the drive circuit 119 drives the semiconductor laser included in the optical head 112 in response to the supplied first timing pulse. In this manner, the disk 540 is irradiated with the pulsed laser beam.
- a laser beam having a wavelength of 650 nm is irradiated on the disk 540 by the optical head 112, and the area 554 and the data signal are reproduced in the same manner as when recording the data signal, and the optical reproduction is performed.
- the reproduced signal, error signal, and data / raw signal of the territory 554 and the pebble 553 are both supplied to the reproduced signal amplifier circuit 1] 4.
- the error signal is sent to the servo circuit 111
- the data playback signal is sent to the single-pass circuit 579, and the playback signal in the area 554 is synchronized.
- the reproduced signal from the signal generating circuit 577 and the reproduced signal from the cable 553 are supplied to the address detecting circuit 578, respectively.
- the control circuit 581 based on the address information supplied from the address detection circuit 5778, converts the synchronization signal CLK shown in FIG.78D into the timing setting circuit 583 and the A / D converter 58 Supply 0.
- the timing setting circuit 583 outputs a first timing pulse for determining the timing of irradiating the disk 540 with a laser beam generated by the semiconductor laser included in the optical head 112. 8 It is generated according to the synchronization signal CLK input from 1 and supplied to the duty correction circuit 582.
- the duty correction circuit 582 converts the input first timing pulse into a laser beam.
- a predetermined duty for turning the system on or off is applied to the laser drive circuit 119.
- the laser drive circuit 119 drives the semiconductor laser included in the optical head 112 in response to the first timing pulse, and the disk 540 is irradiated with a pulsed laser beam. When data is generated, no magnetic field is applied to the disk 540.
- the single-pass circuit 579 removes the noise of the high-frequency component of the data reproduction signal supplied from the reproduction signal width circuit 114, and the AZD converter 580 removes the noise.
- a single playback signal is supplied.
- the A / D converter 580 performs AZD conversion of the data reproduction signal in synchronization with the synchronization signal CLK input from the control circuit 581, and supplies a digital reproduction signal to the high-pass filter 584.
- the high-pass filter 584 removes low-frequency noise caused by birefringence in the disk 540 from this digital signal and the PRML (Partial Response Maximum Likely Hood) circuit 584 Supplies the digital raw signal to the.
- PRML Partial Response Maximum Likely Hood
- the PMLL circuit 585 discriminates the digital reproduction signal into three values (three levels) and demodulates the reproduction data more accurately.
- the operations of the synchronization signal generation circuit 577, the address detection circuit 578, and the servo circuit 111 are the same as the operations during data recording.
- the disc of the present embodiment since no pebbles are formed on both side walls of the group 55 5 in the area where the data signal is recorded or reproduced, the reflected light from the group 55 5 There is no leakage that the polarization direction of the light is affected by the pebbles, which adversely affects the data raw characteristics, and good-cow characteristics can be obtained.
- the area 554 in which the groups 551 and 555 used for generating the synchronization signal are not formed is provided for every 68 bytes, so that the synchronization signal is reliably generated. Therefore, characteristics in recording or reproduction of a data signal can be improved.
- an area 554 is periodically formed between the duplication element 551 and the group 555.
- the present invention is not limited to such a structure, and it is considered that a recording medium having a structure in which the intensity of the reflected light of the laser beam periodically changes exhibits similar effects.
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97930791A EP0930611A4 (en) | 1996-09-26 | 1997-07-14 | RECORDING MEDIUM AND CORRESPONDING REPRODUCING APPARATUS |
AU34604/97A AU3460497A (en) | 1996-09-26 | 1997-07-14 | Recording medium and its reproducer |
Applications Claiming Priority (26)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/255066 | 1996-09-26 | ||
JP25506696 | 1996-09-26 | ||
JP8/268893 | 1996-10-09 | ||
JP26889396 | 1996-10-09 | ||
JP27838596 | 1996-10-21 | ||
JP8/278385 | 1996-10-21 | ||
JP8/301426 | 1996-11-13 | ||
JP30142696 | 1996-11-13 | ||
JP698897 | 1997-01-17 | ||
JP9/6988 | 1997-01-17 | ||
JP1279097 | 1997-01-27 | ||
JP9/12790 | 1997-01-27 | ||
JP9/25655 | 1997-02-07 | ||
JP2565597 | 1997-02-07 | ||
JP9/56681 | 1997-03-11 | ||
JP5668197 | 1997-03-11 | ||
JP7619997 | 1997-03-27 | ||
JP9/76199 | 1997-03-27 | ||
JP9570097 | 1997-04-14 | ||
JP9/95700 | 1997-04-14 | ||
JP10636897 | 1997-04-23 | ||
JP9/106368 | 1997-04-23 | ||
JP10943697 | 1997-04-25 | ||
JP9/109436 | 1997-04-25 | ||
JP9122584A JP2000137930A (ja) | 1997-03-27 | 1997-05-13 | 光記録媒体およびその光再生装置 |
JP9/122584 | 1997-05-13 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/147,962 A-371-Of-International US20020012295A1 (en) | 1996-09-26 | 1997-07-14 | Record medium andreproducing apparatus of the same having sidewalls wobbled in accordance with address information |
US09/750,067 Division US6621772B2 (en) | 1996-09-26 | 2000-12-29 | Record medium and reproducing apparatus of the same for detecting an offset correction |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998013823A1 true WO1998013823A1 (fr) | 1998-04-02 |
Family
ID=27584111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/002442 WO1998013823A1 (fr) | 1996-09-26 | 1997-07-14 | Support d'enregistrement et appareil de reproduction correspondant |
Country Status (6)
Country | Link |
---|---|
US (2) | US20020012295A1 (ja) |
EP (1) | EP0930611A4 (ja) |
KR (1) | KR100324883B1 (ja) |
CN (1) | CN1122258C (ja) |
AU (1) | AU3460497A (ja) |
WO (1) | WO1998013823A1 (ja) |
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0939398A3 (en) * | 1998-02-26 | 2001-04-25 | Victor Company of Japan, Ltd. | Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier |
US6292458B1 (en) | 1998-02-26 | 2001-09-18 | Victor Company Of Japan, Ltd. | Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier |
US6473377B2 (en) | 1998-02-26 | 2002-10-29 | Victor Company Of Japan, Ltd. | Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier |
EP0939398A2 (en) * | 1998-02-26 | 1999-09-01 | Victor Company of Japan, Ltd. | Optical disc record carrier with wobbled grooves that permit recording on the grooves and lands, apparatus for manufacturing such a record carrier, and recording and/or reproducing apparatus for such a record carrier |
US7180839B2 (en) | 1999-02-05 | 2007-02-20 | Samsung Electronics Co., Ltd. | Recording medium having wobbled groove tracks out of phase with wobbled land tracks, servo controlling apparatus using wobble signal and method thereof |
US6853615B1 (en) | 1999-06-29 | 2005-02-08 | Koninklijke Philips Electronics N.V. | Optical record carrier |
WO2001001404A1 (en) * | 1999-06-29 | 2001-01-04 | Koninklijke Philips Electronics N.V. | Optical record carrier |
US7426160B2 (en) | 1999-06-29 | 2008-09-16 | Koninklijke Philips Electronics N.V. | Device for detecting position information from an optical record carrier |
KR100739502B1 (ko) * | 1999-06-29 | 2007-07-13 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 광 기록매체, 광 기록매체를 주사하는 장치 및 방법 |
KR100677087B1 (ko) * | 1999-11-03 | 2007-02-05 | 삼성전자주식회사 | 워블 신호를 이용한 pid 어드레싱 방법과 그 검출방법, 워블 어드레스 엔코딩 회로와 그 검출 회로 및 기록매체 |
US7092329B2 (en) | 1999-11-03 | 2006-08-15 | Samsung Electronics Co., Ltd. | Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor |
KR100677088B1 (ko) * | 1999-11-03 | 2007-02-05 | 삼성전자주식회사 | 워블 신호를 이용한 pid 어드레싱 방법과 그 검출방법, 워블 어드레스 엔코딩 회로와 그 검출 회로 및 기록매체 |
US6791920B1 (en) | 1999-11-03 | 2004-09-14 | Samsung Electronics Co., Ltd. | Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor |
US6744718B1 (en) | 1999-11-03 | 2004-06-01 | Samsung Electronics Co., Ltd. | Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor |
US6671238B1 (en) | 1999-11-03 | 2003-12-30 | Samsung Electronics Co., Ltd. | Physical identification data addressing method using wobble signal, method of detecting wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor |
US6847594B1 (en) | 2000-02-07 | 2005-01-25 | Samsung Electronics Co., Ltd. | Recording medium having wobbled groove tracks out of phase with wobbled land tracks, servo controlling apparatus using wobble signal and method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0930611A4 (en) | 2003-02-12 |
KR100324883B1 (ko) | 2002-02-28 |
US6621772B2 (en) | 2003-09-16 |
AU3460497A (en) | 1998-04-17 |
CN1122258C (zh) | 2003-09-24 |
KR20000048635A (ko) | 2000-07-25 |
CN1238060A (zh) | 1999-12-08 |
EP0930611A1 (en) | 1999-07-21 |
US20010033532A1 (en) | 2001-10-25 |
US20020012295A1 (en) | 2002-01-31 |
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