WO2008102475A1 - 最尤復号装置及び情報再生装置 - Google Patents

最尤復号装置及び情報再生装置 Download PDF

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Publication number
WO2008102475A1
WO2008102475A1 PCT/JP2007/070087 JP2007070087W WO2008102475A1 WO 2008102475 A1 WO2008102475 A1 WO 2008102475A1 JP 2007070087 W JP2007070087 W JP 2007070087W WO 2008102475 A1 WO2008102475 A1 WO 2008102475A1
Authority
WO
WIPO (PCT)
Prior art keywords
undersampling
maximum likelihood
occurrence
likelihood decoder
reproducing device
Prior art date
Application number
PCT/JP2007/070087
Other languages
English (en)
French (fr)
Inventor
Akira Yamamoto
Original Assignee
Panasonic 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.)
Filing date
Publication date
Application filed by Panasonic Corporation filed Critical Panasonic Corporation
Priority to US12/278,238 priority Critical patent/US20100177615A1/en
Priority to CN2007800072402A priority patent/CN101395669B/zh
Priority to JP2008510343A priority patent/JP4679640B2/ja
Publication of WO2008102475A1 publication Critical patent/WO2008102475A1/ja

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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
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • 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
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
    • H03M13/4107—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing add, compare, select [ACS] operations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6569—Implementation on processors, e.g. DSPs, or software implementations
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/65—Purpose and implementation aspects
    • H03M13/6577—Representation or format of variables, register sizes or word-lengths and quantization

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)

Abstract

　最尤復号装置において、アンダーサンプリングが発生した時には、セレクタ２０５～２０７は、ブランチメトリック算出部２０２～２０４からのブランチメトリックを選択せず、「０」値を選択し、パスメトリック算出部２０８は、前記セレクタ２０５～２０７の「０」値に基づいてパスメトリックを算出すると共にパス選択信号を算出する。前記ブランチメトリック算出部２０２～２０４に入力される最尤復号対象の入力信号ｗｓｄｔ＿ｄは、前記セレクタ２０５～２０７が「０」値を選択するアンダーサンプリング発生時を考慮して、その発生時に相当するクロック数分、遅延された信号に調整される。従って、アンダーサンプリング発生時にも正しい復号結果が得られて、正常動作が確保される。
PCT/JP2007/070087 2007-02-21 2007-10-15 最尤復号装置及び情報再生装置 WO2008102475A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/278,238 US20100177615A1 (en) 2007-02-21 2007-10-15 Maximum likelihood decoder and information reproduction apparatus
CN2007800072402A CN101395669B (zh) 2007-02-21 2007-10-15 最大似然译码装置和信息再现装置
JP2008510343A JP4679640B2 (ja) 2007-02-21 2007-10-15 最尤復号装置及び情報再生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007041000 2007-02-21
JP2007-041000 2007-02-21

Publications (1)

Publication Number Publication Date
WO2008102475A1 true WO2008102475A1 (ja) 2008-08-28

Family

ID=39709758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/070087 WO2008102475A1 (ja) 2007-02-21 2007-10-15 最尤復号装置及び情報再生装置

Country Status (4)

Country Link
US (1) US20100177615A1 (ja)
JP (1) JP4679640B2 (ja)
CN (1) CN101395669B (ja)
WO (1) WO2008102475A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100085858A1 (en) * 2008-10-02 2010-04-08 Atsushi Kikugawa Optical disk apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010251942A (ja) * 2009-04-14 2010-11-04 Thine Electronics Inc 受信装置
CN103988452A (zh) * 2011-09-22 2014-08-13 航空网络公司 用于时钟信号同步的系统和方法
JP5967587B2 (ja) * 2011-10-04 2016-08-10 パナソニックＩｐマネジメント株式会社 復号方法及び復号装置
CN103368583B (zh) 2012-04-11 2016-08-17 华为技术有限公司 极性码的译码方法和译码装置
CN106487392B (zh) * 2015-08-24 2019-11-08 北京航空航天大学 降采样译码方法和装置
JP6561713B2 (ja) * 2015-09-15 2019-08-21 富士通株式会社 伝送装置及び伝送システム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251039A (ja) * 1995-01-27 1996-09-27 Thomson Csf チャネル上での情報伝達のための方法
JPH1069727A (ja) * 1996-07-29 1998-03-10 Cirrus Logic Inc サンプリングされた振幅リードチャネル
JP2001101799A (ja) * 1999-10-01 2001-04-13 Matsushita Electric Ind Co Ltd デジタル再生信号処理装置
WO2006019073A1 (ja) * 2004-08-20 2006-02-23 Matsushita Electric Industrial Co., Ltd. 情報再生装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750306B1 (en) * 1995-06-22 2002-06-05 Matsushita Electric Industrial Co., Ltd. A method of maximum likelihood decoding and a digital information playback apparatus
US5771127A (en) * 1996-07-29 1998-06-23 Cirrus Logic, Inc. Sampled amplitude read channel employing interpolated timing recovery and a remod/demod sequence detector
JPH10150370A (ja) * 1996-11-19 1998-06-02 Sony Corp ビタビ復号器およびビタビ復号方法
JP2877109B2 (ja) * 1996-12-12 1999-03-31 日本電気株式会社 情報検出装置および情報検出方法
JP3266059B2 (ja) * 1997-07-24 2002-03-18 日本電気株式会社 ビタビ検出器および情報検出装置
US6603722B1 (en) * 1998-05-18 2003-08-05 Fujitsu Limited System for reproducing data with increased accuracy by reducing difference between sampled and expected values
JP3634842B2 (ja) * 2002-12-27 2005-03-30 株式会社東芝 デジタル信号復号装置及びデジタル信号復号方法
US20050138534A1 (en) * 2003-10-27 2005-06-23 Takeshi Nakajima Maximum likelihood encoding apparatus, maximum likelihood encoding method, program and reproduction apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08251039A (ja) * 1995-01-27 1996-09-27 Thomson Csf チャネル上での情報伝達のための方法
JPH1069727A (ja) * 1996-07-29 1998-03-10 Cirrus Logic Inc サンプリングされた振幅リードチャネル
JP2001101799A (ja) * 1999-10-01 2001-04-13 Matsushita Electric Ind Co Ltd デジタル再生信号処理装置
WO2006019073A1 (ja) * 2004-08-20 2006-02-23 Matsushita Electric Industrial Co., Ltd. 情報再生装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100085858A1 (en) * 2008-10-02 2010-04-08 Atsushi Kikugawa Optical disk apparatus
US8379497B2 (en) * 2008-10-02 2013-02-19 Hitachi Consumer Electronics Co., Ltd. Optical disk apparatus

Also Published As

Publication number Publication date
US20100177615A1 (en) 2010-07-15
CN101395669B (zh) 2011-05-04
CN101395669A (zh) 2009-03-25
JP4679640B2 (ja) 2011-04-27
JPWO2008102475A1 (ja) 2010-05-27

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