WO2008001317A3 - Device and method for retrieving information - Google Patents

Device and method for retrieving information Download PDF

Info

Publication number
WO2008001317A3
WO2008001317A3 PCT/IB2007/052490 IB2007052490W WO2008001317A3 WO 2008001317 A3 WO2008001317 A3 WO 2008001317A3 IB 2007052490 W IB2007052490 W IB 2007052490W WO 2008001317 A3 WO2008001317 A3 WO 2008001317A3
Authority
WO
WIPO (PCT)
Prior art keywords
disc
record carrier
reading
error determination
retrieving information
Prior art date
Application number
PCT/IB2007/052490
Other languages
French (fr)
Other versions
WO2008001317A2 (en
Inventor
Yu Zhou
Original Assignee
Koninkl Philips Electronics Nv
Yu Zhou
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv, Yu Zhou filed Critical Koninkl Philips Electronics Nv
Publication of WO2008001317A2 publication Critical patent/WO2008001317A2/en
Publication of WO2008001317A3 publication Critical patent/WO2008001317A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
    • G11B20/10027—Improvement or modification of read or write signals analog processing for digital recording or reproduction adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10481—Improvement or modification of read or write signals optimisation methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0948—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0953—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
    • G11B2020/10814—Data buffering arrangements, e.g. recording or playback buffers involving specific measures to prevent a buffer underrun

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Multimedia (AREA)

Abstract

A device for retrieving information from a disc-like optical record carrier (11). The device comprises reading means (21, 22, 25, 30) for reading the information recorded on the record carrier and control means (20) for controlling the reading. Further, the device comprises disc error determination and correction means (32, 36, 37, 38, 39, 40, 41, 42) for determining disc errors and taking corrective actions by adjusting beam control parameters on the fly, during scanning of the record carrier. The disc errors handled by the disc error determination and correction means include tilt, unbalance, variable high-frequency signal asymmetry disc, bifringence disc, etcetera.
PCT/IB2007/052490 2006-06-29 2007-06-27 Device and method for retrieving information WO2008001317A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06116268.1 2006-06-29
EP06116268 2006-06-29

Publications (2)

Publication Number Publication Date
WO2008001317A2 WO2008001317A2 (en) 2008-01-03
WO2008001317A3 true WO2008001317A3 (en) 2008-02-21

Family

ID=38686977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/052490 WO2008001317A2 (en) 2006-06-29 2007-06-27 Device and method for retrieving information

Country Status (2)

Country Link
TW (1) TW200818155A (en)
WO (1) WO2008001317A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102341856B (en) * 2009-03-02 2015-01-07 索尼电脑娱乐公司 Optical disk device, control method therefor, program, and information recording medium
CN112285438A (en) * 2020-11-19 2021-01-29 重庆建安仪器有限责任公司 Aerial 3D radiation monitoring system based on aerial location

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840295A2 (en) * 1996-10-31 1998-05-06 Sony Corporation Initializing optical disc systems
US5886962A (en) * 1995-02-22 1999-03-23 Matsushita Electric Industrial Co., Ltd. Tilt control apparatus with tilt target value based on bit error rate signal
US20020031060A1 (en) * 2000-09-13 2002-03-14 Akira Mashimo Optical disk drive apparatus
US20020054549A1 (en) * 2000-10-23 2002-05-09 Hiroshi Ohtsu Optical pickup position control method
US6747924B1 (en) * 1999-10-29 2004-06-08 Yamaha Corporation Optical disk reproduction apparatus
US20050180277A1 (en) * 2004-02-17 2005-08-18 Hitachi, Ltd. Optical disk device and tilt correction method thereof
US20050201225A1 (en) * 2004-03-01 2005-09-15 Toshiyuki Kase Optical disk drive capable of adjusting control information to recording layer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5886962A (en) * 1995-02-22 1999-03-23 Matsushita Electric Industrial Co., Ltd. Tilt control apparatus with tilt target value based on bit error rate signal
EP0840295A2 (en) * 1996-10-31 1998-05-06 Sony Corporation Initializing optical disc systems
US6747924B1 (en) * 1999-10-29 2004-06-08 Yamaha Corporation Optical disk reproduction apparatus
US20020031060A1 (en) * 2000-09-13 2002-03-14 Akira Mashimo Optical disk drive apparatus
US20020054549A1 (en) * 2000-10-23 2002-05-09 Hiroshi Ohtsu Optical pickup position control method
US20050180277A1 (en) * 2004-02-17 2005-08-18 Hitachi, Ltd. Optical disk device and tilt correction method thereof
US20050201225A1 (en) * 2004-03-01 2005-09-15 Toshiyuki Kase Optical disk drive capable of adjusting control information to recording layer

Also Published As

Publication number Publication date
WO2008001317A2 (en) 2008-01-03
TW200818155A (en) 2008-04-16

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