JP4187667B2 - 光ディスク再生装置 - Google Patents
光ディスク再生装置 Download PDFInfo
- Publication number
- JP4187667B2 JP4187667B2 JP2004023123A JP2004023123A JP4187667B2 JP 4187667 B2 JP4187667 B2 JP 4187667B2 JP 2004023123 A JP2004023123 A JP 2004023123A JP 2004023123 A JP2004023123 A JP 2004023123A JP 4187667 B2 JP4187667 B2 JP 4187667B2
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- JP
- Japan
- Prior art keywords
- signal
- circuit
- defect detection
- pulse
- correction
- Prior art date
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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
- G11B7/08—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
- G11B7/0946—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 operation during external perturbations not related to the carrier or servo beam, e.g. vibration
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- Optical Recording Or Reproduction (AREA)
Description
さらに本発明は、振動環境下においてもサーボが外れにくい光ディスク再生装置を提供することを目的とする。
14:信号処理部 16:DAC
18:LPF 20:ゲイン調整部
22:サーボイコライザ 24:ホールドイコライザ
26:スイッチ 28:ディフェクト検出回路
30:ドライバ 40:補正回路
42:LPF 44:ハルス発生回路
46:スイッチ 48:パルス幅制御回路
50:加算回路
Claims (4)
- 光ディスクに記録されたデータを再生する機能を備えた光ディスク再生装置であって、
光ディスクの記録面を照射しその反射光に基づき電気信号を出力する光学ピックアップと、
前記電気信号に基づき、前記記録面に対する光学ピックアップの誤差を示すトラッキングエラー信号を生成する誤差信号生成回路と、
前記電気信号に基づき光ディスクの記録面の欠陥の有無を検出し、当該欠陥の有無を示す欠陥検出信号を出力するディフェクト検出回路と、
前記欠陥検出信号に基づき、欠陥が非検出時に前記トラッキングエラー信号に基づくサーボ駆動信号を出力し、欠陥検出時に欠陥検出前に前記サーボ駆動信号をホールドしたホールド信号を出力するスイッチ回路と、
前記スイッチ回路からの出力に基づき前記光学ピックアップの動作を制御する駆動制御回路と、
前記欠陥検出信号に基づき、欠陥検出時に前記トラッキングエラー信号から光学ピックアップの振動成分を抽出し、該振動成分を示す補正信号を出力する補正回路と、
前記補正回路から出力された前記補正信号を前記ホールド信号に加算する加算回路とを有し、
前記補正回路は、前記トラッキングエラー信号から光学ピックアップの振動成分を示す低域信号を抽出する抽出回路と、前記欠陥検出信号に応答して一定のパルス幅を有するパルス信号を発生するパルス発生回路と、前記パルス信号の一定のパルス幅の期間に前記低域信号を前記補正信号として出力する出力回路とを有する光ディスク再生装置。 - 前記補正回路は、前記パルス発生回路から発生されるパルス信号の前記一定のパルス幅を可変するパルス幅制御回路を含む、請求項1に記載の光ディスク再生装置。
- 前記パルス幅制御回路は、前記一定のパルス幅を有するパルス信号と前記欠陥検出信号とを入力するアンド回路を含み、当該アンド回路により前記一定のパルス幅を可変する、請求項2に記載の光ディスク再生装置。
- 前記抽出回路は、低域通過フィルタであり、前記トラッキングエラー信号に基づき光学ピックアップの目標トラックからの振動によるズレを示す信号を抽出する、請求項1ないし3いずれかに記載の光ディスク再生装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004023123A JP4187667B2 (ja) | 2004-01-30 | 2004-01-30 | 光ディスク再生装置 |
US11/041,190 US7551528B2 (en) | 2004-01-30 | 2005-01-21 | Method and apparatus for tracking servo control of an optical disc playback apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004023123A JP4187667B2 (ja) | 2004-01-30 | 2004-01-30 | 光ディスク再生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005216406A JP2005216406A (ja) | 2005-08-11 |
JP4187667B2 true JP4187667B2 (ja) | 2008-11-26 |
Family
ID=34805698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004023123A Expired - Fee Related JP4187667B2 (ja) | 2004-01-30 | 2004-01-30 | 光ディスク再生装置 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7551528B2 (ja) |
JP (1) | JP4187667B2 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7782723B2 (en) * | 2005-07-05 | 2010-08-24 | Koninklijke Philips Electronics N.V. | Optimum tracking error compensation for improved optical disk playability |
US20070165511A1 (en) * | 2006-01-13 | 2007-07-19 | Tse-Hsiang Hsu | Signal processing method and optical pickup for keeping available information during high speed optical recording |
KR20080024746A (ko) * | 2006-09-14 | 2008-03-19 | 삼성전자주식회사 | 광정보저장매체 재생/기록 장치의 결함 검출 신호의 처리방법 |
JP5775768B2 (ja) * | 2011-09-09 | 2015-09-09 | 日立コンシューマエレクトロニクス株式会社 | 光ディスク装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01162281A (ja) | 1987-12-18 | 1989-06-26 | Victor Co Of Japan Ltd | トラッキング制御装置 |
JPH11149636A (ja) * | 1997-11-19 | 1999-06-02 | Pioneer Electron Corp | 信号欠陥検出装置、信号欠陥検出システム及び情報再生装置 |
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 |
JP3688484B2 (ja) | 1998-11-20 | 2005-08-31 | パイオニア株式会社 | 光学式記録媒体のドライブ装置 |
JP3808683B2 (ja) * | 2000-03-01 | 2006-08-16 | 三菱電機株式会社 | 光ディスク装置 |
-
2004
- 2004-01-30 JP JP2004023123A patent/JP4187667B2/ja not_active Expired - Fee Related
-
2005
- 2005-01-21 US US11/041,190 patent/US7551528B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2005216406A (ja) | 2005-08-11 |
US20050169146A1 (en) | 2005-08-04 |
US7551528B2 (en) | 2009-06-23 |
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