WO2009041598A1 - 信号品質評価装置、方法、及び、情報記録再生装置 - Google Patents

信号品質評価装置、方法、及び、情報記録再生装置 Download PDF

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Publication number
WO2009041598A1
WO2009041598A1 PCT/JP2008/067462 JP2008067462W WO2009041598A1 WO 2009041598 A1 WO2009041598 A1 WO 2009041598A1 JP 2008067462 W JP2008067462 W JP 2008067462W WO 2009041598 A1 WO2009041598 A1 WO 2009041598A1
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WO
WIPO (PCT)
Prior art keywords
calculator
error
value
viterbi
inner product
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Application number
PCT/JP2008/067462
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English (en)
French (fr)
Inventor
Shuichi Ohkubo
Yutaka Yamanaka
Hisashi Sugaya
Original Assignee
Nec Corporation
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.)
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Publication date
Application filed by Nec Corporation filed Critical Nec Corporation
Priority to JP2009534413A priority Critical patent/JPWO2009041598A1/ja
Publication of WO2009041598A1 publication Critical patent/WO2009041598A1/ja

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    • 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
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • 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
    • 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
    • G11B20/1012—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(1,2,2,2,1)
    • 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
    • G11B20/10046—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
    • G11B20/10268—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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1291—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting serves a specific purpose
    • G11B2020/1298—Enhancement of the signal quality

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  • 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)

Abstract

　レベル平均値算出器は、ビタビ検出器が出力する検出データ列と、等化器の出力とから、ビタビ検出器におけるブランチメトリック算出の基準値を生成する。エラーベクトル算出器は、互いに誤りやすい信号列のペアのパス間における基準値の差を求め、基準値の差に基づく値を成分とするエラーベクトルを生成する。実効ノイズ算出器は、エラーベクトルと、ビタビ誤差算出器にて求められたビタビ誤差の時系列データを要素とするベクトルとの内積を求め、内積の２乗平均を算出する。評価指標算出器は、エラーベクトルの大きさと、実効ノイズ算出器にて算出された内積の２乗平均とに基づいて、信号品質評価値を算出する。
PCT/JP2008/067462 2007-09-26 2008-09-26 信号品質評価装置、方法、及び、情報記録再生装置 WO2009041598A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009534413A JPWO2009041598A1 (ja) 2007-09-26 2008-09-26 信号品質評価装置、方法、及び、情報記録再生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-249614 2007-09-26
JP2007249614 2007-09-26

Publications (1)

Publication Number Publication Date
WO2009041598A1 true WO2009041598A1 (ja) 2009-04-02

Family

ID=40511478

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067462 WO2009041598A1 (ja) 2007-09-26 2008-09-26 信号品質評価装置、方法、及び、情報記録再生装置

Country Status (2)

Country Link
JP (1) JPWO2009041598A1 (ja)
WO (1) WO2009041598A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2249343A1 (en) * 2009-05-08 2010-11-10 Hitachi Consumer Electronics Co., Ltd. Adjusting method for recording condition and optical disc device
JP2012014829A (ja) * 2011-10-21 2012-01-19 Hitachi Ltd 記録条件の調整方法及び光ディスク装置
JP2012084227A (ja) * 2012-02-02 2012-04-26 Hitachi Ltd 記録条件の調整方法及び光ディスク装置
CN104335278A (zh) * 2012-06-04 2015-02-04 索尼公司 信号质量评估装置、信号质量评估方法以及再生装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004213862A (ja) * 2002-12-17 2004-07-29 Nec Corp 光ディスク及び光ディスク記録再生装置および光ディスクの信号品質評価方法
JP2004253114A (ja) * 2003-01-28 2004-09-09 Nec Corp 信号評価方法と情報記録再生装置と情報再生装置及び情報記録媒体
JP2005346897A (ja) * 2004-05-07 2005-12-15 Hitachi Ltd 再生信号の評価方法および光ディスク装置
JP2006202459A (ja) * 2004-12-24 2006-08-03 Victor Co Of Japan Ltd 再生装置及び記録再生装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004213862A (ja) * 2002-12-17 2004-07-29 Nec Corp 光ディスク及び光ディスク記録再生装置および光ディスクの信号品質評価方法
JP2004253114A (ja) * 2003-01-28 2004-09-09 Nec Corp 信号評価方法と情報記録再生装置と情報再生装置及び情報記録媒体
JP2005346897A (ja) * 2004-05-07 2005-12-15 Hitachi Ltd 再生信号の評価方法および光ディスク装置
JP2006202459A (ja) * 2004-12-24 2006-08-03 Victor Co Of Japan Ltd 再生装置及び記録再生装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2249343A1 (en) * 2009-05-08 2010-11-10 Hitachi Consumer Electronics Co., Ltd. Adjusting method for recording condition and optical disc device
CN101882452B (zh) * 2009-05-08 2013-08-21 日立民用电子株式会社 记录条件的调整方法和光盘装置
US8531932B2 (en) 2009-05-08 2013-09-10 Hitachi Consumer Electronics Co., Ltd. Adjusting method for recording condition and optical disc device
JP2012014829A (ja) * 2011-10-21 2012-01-19 Hitachi Ltd 記録条件の調整方法及び光ディスク装置
JP2012084227A (ja) * 2012-02-02 2012-04-26 Hitachi Ltd 記録条件の調整方法及び光ディスク装置
CN104335278A (zh) * 2012-06-04 2015-02-04 索尼公司 信号质量评估装置、信号质量评估方法以及再生装置
JPWO2013183385A1 (ja) * 2012-06-04 2016-01-28 ソニー株式会社 信号品質評価装置、信号品質評価方法、再生装置
EP2858070A4 (en) * 2012-06-04 2016-06-15 Sony Corp SIGNAL QUALITY EVALUATION DEVICE, SIGNAL QUALITY EVALUATION METHOD, AND REPRODUCTION DEVICE
US9461672B2 (en) 2012-06-04 2016-10-04 Sony Corporation Signal quality evaluation apparatus, signal quality evaluation method, and reproducing device

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