JP2005332437A - 再生信号評価方法及び情報記録再生装置 - Google Patents

再生信号評価方法及び情報記録再生装置 Download PDF

Info

Publication number
JP2005332437A
JP2005332437A JP2004147855A JP2004147855A JP2005332437A JP 2005332437 A JP2005332437 A JP 2005332437A JP 2004147855 A JP2004147855 A JP 2004147855A JP 2004147855 A JP2004147855 A JP 2004147855A JP 2005332437 A JP2005332437 A JP 2005332437A
Authority
JP
Japan
Prior art keywords
recording
reproduction signal
state transition
value
metric
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.)
Pending
Application number
JP2004147855A
Other languages
English (en)
Japanese (ja)
Other versions
JP2005332437A5 (enExample
Inventor
Yasuyuki Miyaoka
康之 宮岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2004147855A priority Critical patent/JP2005332437A/ja
Priority to US11/131,194 priority patent/US20060015797A1/en
Publication of JP2005332437A publication Critical patent/JP2005332437A/ja
Publication of JP2005332437A5 publication Critical patent/JP2005332437A5/ja
Pending legal-status Critical Current

Links

Images

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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
    • G11B20/10111—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom partial response PR(1,2,2,1)
    • 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
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10287—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors
    • G11B20/10296—Improvement or modification of read or write signals bit detection or demodulation methods using probabilistic methods, e.g. maximum likelihood detectors using the Viterbi algorithm
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)
JP2004147855A 2004-05-18 2004-05-18 再生信号評価方法及び情報記録再生装置 Pending JP2005332437A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004147855A JP2005332437A (ja) 2004-05-18 2004-05-18 再生信号評価方法及び情報記録再生装置
US11/131,194 US20060015797A1 (en) 2004-05-18 2005-05-18 Information reproducing method and information recording reproducing apparatus with maximum likelihood decoding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004147855A JP2005332437A (ja) 2004-05-18 2004-05-18 再生信号評価方法及び情報記録再生装置

Publications (2)

Publication Number Publication Date
JP2005332437A true JP2005332437A (ja) 2005-12-02
JP2005332437A5 JP2005332437A5 (enExample) 2007-06-21

Family

ID=35486999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004147855A Pending JP2005332437A (ja) 2004-05-18 2004-05-18 再生信号評価方法及び情報記録再生装置

Country Status (2)

Country Link
US (1) US20060015797A1 (enExample)
JP (1) JP2005332437A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009122642A1 (ja) * 2008-03-31 2009-10-08 パナソニック株式会社 再生信号品質評価装置及び方法
US7725809B2 (en) 2005-02-28 2010-05-25 Sharp Kabushiki Kaisha Signal quality evaluation device, information read/write device, signal quality evaluation method, write conditions determining method, signal quality evaluation computer program, computer-readable storage medium containing signal quality evaluation computer program

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7307807B1 (en) * 2003-09-23 2007-12-11 Marvell International Ltd. Disk servo pattern writing
US7986753B1 (en) * 2006-09-18 2011-07-26 Sibeam, Inc. Modified branch metric for decoders and equalizers
RU2009103766A (ru) * 2006-12-28 2010-08-10 Панасоник Корпорэйшн (Jp) Способ оценки носителя записи информации, носитель записи информации, способ изготовления носителя записи информации, способ обработки сигналов и устройство управления доступом

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3674160B2 (ja) * 1996-07-04 2005-07-20 ソニー株式会社 情報記録再生装置の余裕度検出装置
JP3546351B2 (ja) * 1999-12-22 2004-07-28 株式会社日立製作所 磁気ディスクまたは磁気ヘッドの検査装置
EP1262971B1 (en) * 2001-05-28 2009-07-29 Sharp Kabushiki Kaisha BER evaluation in an optical disk decoder by counting a number of signals after PRML having a likelihood below a threshold.
US20030067998A1 (en) * 2001-07-19 2003-04-10 Matsushita Electric Industrial Co., Ltd. Method for evaluating the quality of read signal and apparatus for reading information
CN1306516C (zh) * 2001-11-09 2007-03-21 株式会社东芝 信息记录/还原系统和记录校正方法
JP4695814B2 (ja) * 2002-02-08 2011-06-08 株式会社日立グローバルストレージテクノロジーズ データ復号方法・回路及びこれを用いた情報記録再生装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7725809B2 (en) 2005-02-28 2010-05-25 Sharp Kabushiki Kaisha Signal quality evaluation device, information read/write device, signal quality evaluation method, write conditions determining method, signal quality evaluation computer program, computer-readable storage medium containing signal quality evaluation computer program
WO2009122642A1 (ja) * 2008-03-31 2009-10-08 パナソニック株式会社 再生信号品質評価装置及び方法

Also Published As

Publication number Publication date
US20060015797A1 (en) 2006-01-19

Similar Documents

Publication Publication Date Title
JP3926688B2 (ja) 再生信号品質評価方法および情報再生装置
US7940622B2 (en) Recording/reproduction device, evaluation value calculation method, and evaluation value calculation device
KR101049695B1 (ko) 기록 제어 장치, 기록 및 재생 장치, 및 기록 제어 방법
JP5391081B2 (ja) 再生信号評価方法、再生信号評価装置及びこれを備えた光ディスク装置
JP5441906B2 (ja) 再生信号評価方法、再生信号評価装置及びこれを備えた光ディスク装置
JP4655892B2 (ja) 記録再生装置、記録方法
JP2005332437A (ja) 再生信号評価方法及び情報記録再生装置
JP2005196964A (ja) 情報記録再生装置及びその信号評価方法
US8599670B2 (en) Viterbi detector and information reproducing apparatus
JP2005166221A (ja) 情報再生方法及び情報再生装置
JP2010140551A (ja) 光ディスク再生方法および再生装置
JP4727310B2 (ja) 波形等化装置、情報再生装置、波形等化方法、波形等化プログラムおよび記録媒体
TW201351402A (zh) 信號品質評估裝置、信號品質評估方法及再生裝置
JPWO2009122642A1 (ja) 再生信号品質評価装置及び方法
JP4174408B2 (ja) 情報再生装置
JP3836862B2 (ja) 情報記録再生方法
KR100269436B1 (ko) 광 디스크의 정보 재생방법
JP2010033656A (ja) データ再生装置及び再生方法
JP2006202459A (ja) 再生装置及び記録再生装置
JP2006302479A (ja) 光記録媒体記録再生方法、光記録媒体記録再生装置、光記録媒体再生方法及び光記録媒体再生装置
KR20000021541A (ko) 광디스크 재생시스템의 비터비 복호방법
JP2006236510A (ja) 記録条件設定装置、記録再生装置、記録条件設定方法、制御プログラム及び記録媒体
JP2002124042A (ja) 情報再生装置及び再生方法
JP2005216480A (ja) 情報記録再生装置及びその信号評価方法
JP2011192357A (ja) 記録制御方法

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070502

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070502

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080125

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20080207

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20080521