TW200634748A - Method and device for protecting a servo in reading signals on a defect disc - Google Patents
Method and device for protecting a servo in reading signals on a defect discInfo
- Publication number
- TW200634748A TW200634748A TW094146218A TW94146218A TW200634748A TW 200634748 A TW200634748 A TW 200634748A TW 094146218 A TW094146218 A TW 094146218A TW 94146218 A TW94146218 A TW 94146218A TW 200634748 A TW200634748 A TW 200634748A
- Authority
- TW
- Taiwan
- Prior art keywords
- defect
- signals
- servo
- protecting
- disc
- Prior art date
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
- G11B20/10305—Improvement or modification of read or write signals signal quality assessment
- G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
- G11B20/10425—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by counting out-of-lock events of a PLL
-
- 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
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- 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
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
-
- 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
- G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Tests Of Electronic Circuits (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66235105P | 2005-03-17 | 2005-03-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200634748A true TW200634748A (en) | 2006-10-01 |
TWI299490B TWI299490B (en) | 2008-08-01 |
Family
ID=37002817
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094146218A TWI299490B (en) | 2005-03-17 | 2005-12-23 | Method and device for protecting a servo in reading signals on a defect disc |
TW094146217A TWI324342B (en) | 2005-03-17 | 2005-12-23 | Method and device for protecting a slicer in reading signals on a defect disc |
TW095106389A TWI321780B (en) | 2005-03-17 | 2006-02-24 | Method and device for protecting a preamplifier in reading signals on a defect disc |
TW095106391A TWI321781B (en) | 2005-03-17 | 2006-02-24 | Method and device for protecting a pll in reading signals on a defect disc |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094146217A TWI324342B (en) | 2005-03-17 | 2005-12-23 | Method and device for protecting a slicer in reading signals on a defect disc |
TW095106389A TWI321780B (en) | 2005-03-17 | 2006-02-24 | Method and device for protecting a preamplifier in reading signals on a defect disc |
TW095106391A TWI321781B (en) | 2005-03-17 | 2006-02-24 | Method and device for protecting a pll in reading signals on a defect disc |
Country Status (3)
Country | Link |
---|---|
US (4) | US8134898B2 (zh) |
CN (4) | CN100424777C (zh) |
TW (4) | TWI299490B (zh) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6745268B1 (en) * | 2000-08-11 | 2004-06-01 | Micron Technology, Lnc. | Capacitive multidrop bus compensation |
EP2040258B1 (en) * | 2006-07-10 | 2010-09-15 | Panasonic Corporation | Optical disc device |
TWI348688B (en) | 2007-05-09 | 2011-09-11 | Sunplus Technology Co Ltd | Apparatus and method for detecting a defect of an optical disc |
JP2009070510A (ja) * | 2007-09-14 | 2009-04-02 | Sony Corp | 再生装置、再生方法 |
TWI361431B (en) * | 2007-11-09 | 2012-04-01 | Sunplus Technology Co Ltd | Apparatus and method for generating track-crossing signal of optical disk device |
US20100226227A1 (en) * | 2009-03-09 | 2010-09-09 | Chih-Ching Yu | Methods and apparatuses of processing readback signal generated from reading optical storage medium |
EP2569771A1 (en) | 2010-05-10 | 2013-03-20 | Marvell World Trade Ltd. | Method and apparatus for offset and gain correction |
US8493681B1 (en) | 2010-11-23 | 2013-07-23 | Western Digital Technologies, Inc. | Disk drive generating map of margin rectangles around defects |
US8964320B1 (en) | 2010-12-09 | 2015-02-24 | Western Digital Technologies, Inc. | Disk drive defect scanning by writing consecutive data tracks and skipping tracks when reading the data tracks |
EP2754153A1 (en) * | 2011-09-08 | 2014-07-16 | Marvell World Trade Ltd. | Method and apparatus for offset and gain correction |
US8619529B1 (en) * | 2012-03-22 | 2013-12-31 | Western Digital Technologies, Inc. | Methods and devices for enhanced adaptive margining based on channel threshold measure |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61208634A (ja) | 1985-03-13 | 1986-09-17 | Mitsubishi Electric Corp | 情報再生装置 |
US5247254A (en) * | 1990-12-21 | 1993-09-21 | Maxtor Corporation | Data recording system incorporating flaw detection circuitry |
US5388087A (en) * | 1991-07-11 | 1995-02-07 | Hitachi, Ltd. | Recording and reproducing apparatus including changing a reproduction characteristic when an error has occurred in reproduced data |
DE69433095T2 (de) * | 1993-12-01 | 2004-06-03 | Maxtor Corp., San Jose | Plattenlaufwerk mit adaptivem lese-/schreibkanal zur optimierung der leistung zwischen kopf, medium und kanal |
US5533031A (en) * | 1994-06-24 | 1996-07-02 | International Business Machines Corporation | Adjustable read channel equalization for error processing in a recordable media drive |
JP3712135B2 (ja) * | 1995-01-20 | 2005-11-02 | ソニー株式会社 | 情報記録装置、情報再生装置、および情報記録媒体 |
WO1996024130A1 (fr) * | 1995-01-31 | 1996-08-08 | Sony Corporation | Dispositif de reproduction d'informations sur un support d'enregistrement optique |
JP3398155B2 (ja) * | 1995-03-08 | 2003-04-21 | 松下電器産業株式会社 | ディスク用再生装置 |
KR970071525A (ko) * | 1996-04-30 | 1997-11-07 | 배순훈 | 디지탈 포커스 제어 장치 및 방법 |
JP3758306B2 (ja) * | 1997-06-12 | 2006-03-22 | パイオニア株式会社 | 記録媒体の傷検出装置及びこれを用いた読取装置 |
JP3945880B2 (ja) * | 1997-12-01 | 2007-07-18 | パイオニア株式会社 | 信号補完装置、情報再生装置及び情報記録装置 |
KR100263907B1 (ko) * | 1998-04-13 | 2000-08-16 | 윤종용 | 피킹보상을 구비하는 efm 신호 변환장치 |
JPH11298323A (ja) * | 1998-04-16 | 1999-10-29 | Nec Yamagata Ltd | 高速ロックアップpll回路 |
US6292448B1 (en) * | 1998-07-27 | 2001-09-18 | Pioneer Corporation | Information recording apparatus |
JP3856418B2 (ja) * | 1998-09-10 | 2006-12-13 | パイオニア株式会社 | 記録媒体プレーヤのサーボ装置 |
JP2000090590A (ja) | 1998-09-11 | 2000-03-31 | Alps Electric Co Ltd | 光ディスク装置 |
US7085204B1 (en) * | 1999-05-18 | 2006-08-01 | Lg Electronics, Inc. | Method and apparatus for controlling record and reproduction of optical record medium involving averaging servo error signals |
KR100652356B1 (ko) * | 2000-02-07 | 2006-11-30 | 삼성전자주식회사 | 광대역 채널 클럭 복원 시 안정된 클럭 재생을 위한 위상동기 루프 및 그의 동작 방법 |
US7016280B2 (en) * | 2001-01-25 | 2006-03-21 | Dphi Acquisitions, Inc. | Tracking and focus servo system with defect detection |
JP2003067951A (ja) * | 2001-08-30 | 2003-03-07 | Toshiba Corp | 光ディスク装置及び光ディスク装置の制御方法 |
EP1453051A1 (en) * | 2001-11-07 | 2004-09-01 | Matsushita Electric Industrial Co., Ltd. | Method for controlling defect of optical disk, optical disk recording device, and optical disk reproducing device |
JP3580292B2 (ja) * | 2002-03-20 | 2004-10-20 | 船井電機株式会社 | ディスク再生装置 |
JP3825375B2 (ja) * | 2002-08-02 | 2006-09-27 | パイオニア株式会社 | 情報再生装置及び方法、並びにエラー訂正システム |
KR100512956B1 (ko) * | 2003-01-27 | 2005-09-07 | 삼성전자주식회사 | 광기록/재생장치의 결함신호 검출장치 및 그의 결함신호검출방법 |
TWI248079B (en) * | 2003-06-19 | 2006-01-21 | Ind Tech Res Inst | Dynamic radio frequency ripple signal compensator of optical storage system |
EP1524661A1 (en) * | 2003-10-14 | 2005-04-20 | Deutsche Thomson-Brandt Gmbh | Defect handling for recording media |
-
2005
- 2005-12-23 TW TW094146218A patent/TWI299490B/zh active
- 2005-12-23 TW TW094146217A patent/TWI324342B/zh active
- 2005-12-28 CN CNB2005100035162A patent/CN100424777C/zh active Active
- 2005-12-28 CN CNB2005100035158A patent/CN100435233C/zh active Active
-
2006
- 2006-02-24 TW TW095106389A patent/TWI321780B/zh active
- 2006-02-24 TW TW095106391A patent/TWI321781B/zh active
- 2006-03-02 CN CNB200610058856XA patent/CN100468557C/zh active Active
- 2006-03-02 CN CNB2006100588540A patent/CN100414637C/zh active Active
- 2006-03-16 US US11/376,174 patent/US8134898B2/en active Active
- 2006-03-16 US US11/376,172 patent/US7626905B2/en active Active
- 2006-03-16 US US11/376,166 patent/US8121001B2/en active Active
- 2006-03-16 US US11/376,173 patent/US20060221732A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US8134898B2 (en) | 2012-03-13 |
CN100468557C (zh) | 2009-03-11 |
CN100414637C (zh) | 2008-08-27 |
TWI299490B (en) | 2008-08-01 |
CN100424777C (zh) | 2008-10-08 |
CN1848283A (zh) | 2006-10-18 |
CN1835110A (zh) | 2006-09-20 |
US20060215520A1 (en) | 2006-09-28 |
TW200634771A (en) | 2006-10-01 |
TWI321781B (en) | 2010-03-11 |
US8121001B2 (en) | 2012-02-21 |
TWI321780B (en) | 2010-03-11 |
CN1835111A (zh) | 2006-09-20 |
US20060215519A1 (en) | 2006-09-28 |
TW200634739A (en) | 2006-10-01 |
US20060215518A1 (en) | 2006-09-28 |
CN1848273A (zh) | 2006-10-18 |
TW200634740A (en) | 2006-10-01 |
CN100435233C (zh) | 2008-11-19 |
US20060221732A1 (en) | 2006-10-05 |
US7626905B2 (en) | 2009-12-01 |
TWI324342B (en) | 2010-05-01 |
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