JP4500949B2 - 光ディスクの信号処理方法及び装置 - Google Patents
光ディスクの信号処理方法及び装置 Download PDFInfo
- Publication number
- JP4500949B2 JP4500949B2 JP2007126398A JP2007126398A JP4500949B2 JP 4500949 B2 JP4500949 B2 JP 4500949B2 JP 2007126398 A JP2007126398 A JP 2007126398A JP 2007126398 A JP2007126398 A JP 2007126398A JP 4500949 B2 JP4500949 B2 JP 4500949B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- light receiving
- diffraction limit
- recording
- phase difference
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
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
- G11B7/004—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
- 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
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
-
- 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
- G11B2220/2595—Super-resolution optical discs, i.e. optical discs wherein the size of marks is below the optical diffraction limit
-
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
Description
Claims (5)
- 光検出器により検出した光ディスクの再生信号を信号処理する方法において、
前記光検出器をタンゼンシャル方向に2分割された受光素子で構成して、該光検出器から得られた2つの再生信号間の位相差を判断することにより、検出した再生信号について、回折限界以上の記録ピットであるか無いかの判断をし、
前記検出した光ディスクの再生信号に対して、回折限界以上の記録ピットに適したイコライザー処理又は回折限界以下の記録ピットに適したイコライザー処理のうちいずれかを、前記判断に基づいて行い、
イコライザー処理したおのおの信号を合成することにより信号処理した出力信号を得ることから成る光ディスクの信号処理方法。 - 前記2つの再生信号間の位相差の判断は、タンゼンシャル方向の一側の受光素子から発生した受光信号の位相が他側の受光素子から発生した受光信号の位相より先立つ程度を示す位相差の程度信号に基づいて行う請求項1に記載の光ディスクの信号処理方法。
- 光検出器により検出した光ディスクの再生信号を信号処理する装置において、
前記光検出器をタンゼンシャル方向に2分割された受光素子で構成して、該光検出器から得られた2つの再生信号間の位相差を判断することにより、検出した再生信号について、回折限界以上の記録ピットであるか無いかの判断をする回路と、
前記検出した光ディスクの再生信号に対して、回折限界以上の記録ピットに適したイコライザー処理又は回折限界以下の記録ピットに適したイコライザー処理のうちいずれかを、前記判断に基づいて行なう回路と、
イコライザー処理したおのおの信号を合成して信号処理した出力信号を得る回路と、
から成る光ディスクの信号処理装置。 - 前記2つの再生信号間の位相差の判断は、タンゼンシャル方向の一側の受光素子から発生した受光信号の位相が他側の受光素子から発生した受光信号の位相より先立つ程度を示す位相差の程度信号に基づいて行う請求項3に記載の光ディスクの信号処理装置。
- 前記イコライザー処理を行なう回路は、分割したそれぞれの信号のために、予め設定されたフィルタ及びゲイン調整回路を有する請求項3に記載の光ディスクの信号処理装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007126398A JP4500949B2 (ja) | 2007-05-11 | 2007-05-11 | 光ディスクの信号処理方法及び装置 |
US12/599,659 US7983137B2 (en) | 2007-05-11 | 2008-03-11 | Method and apparatus for processing optical disc signal |
PCT/JP2008/054360 WO2008139773A1 (ja) | 2007-05-11 | 2008-03-11 | 光ディスクの信号処理方法及び装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007126398A JP4500949B2 (ja) | 2007-05-11 | 2007-05-11 | 光ディスクの信号処理方法及び装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008282485A JP2008282485A (ja) | 2008-11-20 |
JP4500949B2 true JP4500949B2 (ja) | 2010-07-14 |
Family
ID=40001996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007126398A Expired - Fee Related JP4500949B2 (ja) | 2007-05-11 | 2007-05-11 | 光ディスクの信号処理方法及び装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7983137B2 (ja) |
JP (1) | JP4500949B2 (ja) |
WO (1) | WO2008139773A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5404181B2 (ja) * | 2009-05-25 | 2014-01-29 | 三菱電機株式会社 | 光ディスク装置 |
EP3385952B1 (en) * | 2015-12-02 | 2020-08-26 | Sony Corporation | Information processing device, information processing method, and program |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002074735A (ja) * | 2000-09-04 | 2002-03-15 | National Institute Of Advanced Industrial & Technology | 光信号再生方法及び光信号再生装置 |
JP2008165925A (ja) * | 2006-12-28 | 2008-07-17 | Hitachi Ltd | 光ディスク装置 |
JP2008243340A (ja) * | 2007-03-29 | 2008-10-09 | Institute Of National Colleges Of Technology Japan | 光ディスク用再生等化方法および再生等化回路 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2508491B2 (ja) * | 1987-09-28 | 1996-06-19 | ソニー株式会社 | デ―タ再生装置 |
US5530641A (en) * | 1991-05-17 | 1996-06-25 | Olympus Optical Co., Ltd. | Optical recording medium having grooves and lands and/or plural pit lines, and reproducing apparatus therefor |
JP3104762B2 (ja) | 1991-11-08 | 2000-10-30 | ソニー株式会社 | デジタル信号再生装置 |
JPH1092037A (ja) * | 1996-09-19 | 1998-04-10 | Canon Inc | 光磁気記録再生方法及び光磁気記録再生装置 |
JPH10334534A (ja) * | 1997-05-28 | 1998-12-18 | Canon Inc | 光磁気記録再生方法及び光磁気記録再生装置 |
JP3703315B2 (ja) * | 1997-10-01 | 2005-10-05 | キヤノン株式会社 | 光磁気記録再生方法及びその再生装置 |
JP3787316B2 (ja) * | 2002-04-26 | 2006-06-21 | キヤノン株式会社 | 光磁気記録再生装置 |
KR100932506B1 (ko) | 2003-02-27 | 2009-12-17 | 엘지전자 주식회사 | 고밀도 광디스크의 재생 제어정보 관리 및 데이터 재생제어방법 |
TWI225245B (en) * | 2003-06-30 | 2004-12-11 | Ritek Corp | Method of reproducing optical recording medium with high recording density |
KR20050081260A (ko) * | 2004-02-11 | 2005-08-19 | 삼성전자주식회사 | 초해상 정보저장매체에 기록된 정보 재생방법 및 장치 |
KR20050086305A (ko) * | 2004-02-25 | 2005-08-30 | 삼성전자주식회사 | 초해상 정보 저장매체 및 재생 신호 안정화 방법 |
KR20050092165A (ko) * | 2004-03-15 | 2005-09-21 | 삼성전자주식회사 | 복수의 재생 파워 정보를 갖는 정보저장매체 |
JP2005302095A (ja) | 2004-04-08 | 2005-10-27 | Tdk Corp | 再生装置および情報記録媒体評価装置 |
JP4556818B2 (ja) | 2005-09-21 | 2010-10-06 | Tdk株式会社 | 光記録媒体への情報記録方法及び装置 |
CN101079273B (zh) * | 2006-03-14 | 2010-09-08 | 株式会社理光 | 数据再现方法、数据再现装置、光盘和数据记录/再现装置 |
-
2007
- 2007-05-11 JP JP2007126398A patent/JP4500949B2/ja not_active Expired - Fee Related
-
2008
- 2008-03-11 WO PCT/JP2008/054360 patent/WO2008139773A1/ja active Application Filing
- 2008-03-11 US US12/599,659 patent/US7983137B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002074735A (ja) * | 2000-09-04 | 2002-03-15 | National Institute Of Advanced Industrial & Technology | 光信号再生方法及び光信号再生装置 |
JP2008165925A (ja) * | 2006-12-28 | 2008-07-17 | Hitachi Ltd | 光ディスク装置 |
JP2008243340A (ja) * | 2007-03-29 | 2008-10-09 | Institute Of National Colleges Of Technology Japan | 光ディスク用再生等化方法および再生等化回路 |
Also Published As
Publication number | Publication date |
---|---|
JP2008282485A (ja) | 2008-11-20 |
US7983137B2 (en) | 2011-07-19 |
WO2008139773A1 (ja) | 2008-11-20 |
US20100214897A1 (en) | 2010-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5450376B2 (ja) | 信号評価方法および信号評価装置 | |
KR20110044831A (ko) | 재생 신호 평가 방법, 재생 신호 평가 장치 및 이것을 구비한 광디스크 장치 | |
JP5057925B2 (ja) | デジタル情報再生方法 | |
JP4500949B2 (ja) | 光ディスクの信号処理方法及び装置 | |
KR101148686B1 (ko) | 광 헤드 장치, 광 디스크 장치 및 광 디스크 | |
KR20110124122A (ko) | 재생 신호 평가 방법, 재생 신호 평가 장치 및 이것을 구비한 광디스크 장치 | |
US9754619B1 (en) | Optical disc apparatus controlling irradiation position based on cross-correlation value between reproduction signal and decoded signal | |
JP2008282511A (ja) | 光ディスク装置及び光ディスク再生方法 | |
JP4384239B2 (ja) | 光ディスク装置及び光ディスク再生方法 | |
JP5320567B2 (ja) | 光ディスク用再生等化方法および再生等化回路 | |
JP5344181B2 (ja) | ウォブル有無判定装置、媒体判別装置、ウォブル有無判定方法および媒体判別方法 | |
JP5341522B2 (ja) | 光記録媒体、その製造方法、再生信号処理方法及び評価方法 | |
JP4281717B2 (ja) | 光ディスク装置 | |
JP2020170576A (ja) | 光ディスク評価方法、光ディスク装置 | |
WO2009119019A1 (ja) | 記録条件又は再生条件の決定方法、集積回路、及び光ディスク装置 | |
JP4234042B2 (ja) | 多値情報記録媒体,多値情報波形等化装置,多値情報再生装置 | |
KR100628193B1 (ko) | 광 기록매체의 재생 방법 | |
KR20080075916A (ko) | 대각선 푸시-풀을 통한 래디얼 틸트 추정 | |
US20080205208A1 (en) | Optical System With Filtered Push Pull Radial Tracking | |
KR100694094B1 (ko) | 초해상 광기록매체의 데이터 신호 특성 개선 방법 및 장치 | |
JP4303184B2 (ja) | 多値情報再生方法、情報再生装置、多値情報記録方法、情報記録装置及び光情報記録媒体 | |
CN116917990A (zh) | 信息记录再现装置以及信息记录再现方法 | |
JP2000090464A (ja) | 光ピックアップ及び情報再生装置 | |
CN100421157C (zh) | 预置凹坑信号检测装置及光盘记录再生装置 | |
JP2005078697A (ja) | 光記録媒体、その駆動装置およびその再生方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20090319 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090630 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090706 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090908 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091014 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20091215 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20091218 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20100323 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20100323 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130430 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130430 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130430 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140430 Year of fee payment: 4 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |