DE68925347T2 - Verfahren zur Signalverarbeitung in einem Kanal - Google Patents

Verfahren zur Signalverarbeitung in einem Kanal

Info

Publication number
DE68925347T2
DE68925347T2 DE68925347T DE68925347T DE68925347T2 DE 68925347 T2 DE68925347 T2 DE 68925347T2 DE 68925347 T DE68925347 T DE 68925347T DE 68925347 T DE68925347 T DE 68925347T DE 68925347 T2 DE68925347 T2 DE 68925347T2
Authority
DE
Germany
Prior art keywords
channel
signal processing
signal
processing
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
Application number
DE68925347T
Other languages
English (en)
Other versions
DE68925347D1 (de
Inventor
Arvind Motibhai Patel
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of DE68925347D1 publication Critical patent/DE68925347D1/de
Application granted granted Critical
Publication of DE68925347T2 publication Critical patent/DE68925347T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations 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
    • 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
    • G11B20/1488—Digital recording or reproducing using self-clocking codes characterised by the use of three levels
DE68925347T 1988-11-14 1989-10-31 Verfahren zur Signalverarbeitung in einem Kanal Expired - Fee Related DE68925347T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/270,895 US4945538A (en) 1988-11-14 1988-11-14 Method and apparatus for processing sample values in a coded signal processing channel

Publications (2)

Publication Number Publication Date
DE68925347D1 DE68925347D1 (de) 1996-02-15
DE68925347T2 true DE68925347T2 (de) 1996-07-11

Family

ID=23033286

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68925347T Expired - Fee Related DE68925347T2 (de) 1988-11-14 1989-10-31 Verfahren zur Signalverarbeitung in einem Kanal

Country Status (4)

Country Link
US (1) US4945538A (de)
EP (1) EP0369962B1 (de)
JP (1) JPH0817331B2 (de)
DE (1) DE68925347T2 (de)

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EP0438993B1 (de) * 1990-01-25 1997-03-05 International Business Machines Corporation Dekodierungsverfahren mit hoher Datenrate für die Signalverarbeitung in kodierten Kanälen
US5291500A (en) * 1990-05-22 1994-03-01 International Business Machines Corporation Eight-sample look-ahead for coded signal processing channels
JP2693256B2 (ja) * 1990-05-25 1997-12-24 富士通株式会社 記録装置用ビタビ等化器及び記録装置
US5375129A (en) * 1990-07-19 1994-12-20 Technophone Limited Maximum likelihood sequence detector
US5220466A (en) * 1991-05-21 1993-06-15 International Business Machines Corporation Method and apparatus for digital filter control in a partial-response maximum-likelihood disk drive system
US5243605A (en) * 1991-07-11 1993-09-07 Storage Technology Corporation Modified viterbi detector with run-length code constraint
US5502735A (en) * 1991-07-16 1996-03-26 Nokia Mobile Phones (U.K.) Limited Maximum likelihood sequence detector
US5327440A (en) * 1991-10-15 1994-07-05 International Business Machines Corporation Viterbi trellis coding methods and apparatus for a direct access storage device
US5196849A (en) * 1992-01-31 1993-03-23 International Business Machines Corporation Method and apparatus for implementing PRML codes with maximum ones
US5298901A (en) * 1992-02-12 1994-03-29 Storage Technology Corporation Digital decoding using dynamically determined tracking threshold values
US5359606A (en) * 1992-02-12 1994-10-25 Storage Technology Corporation Data quality analysis in a data signal processing channel
US5257272A (en) * 1992-04-15 1993-10-26 International Business Machines Corporation Time-varying modulo N trellis codes for input restricted partial response channels
US5280489A (en) * 1992-04-15 1994-01-18 International Business Machines Corporation Time-varying Viterbi detector for control of error event length
US5329554A (en) * 1992-05-08 1994-07-12 Cirrus Logic, Inc. Digital pulse detector
US5266850A (en) * 1992-06-30 1993-11-30 International Business Machines Corporation Clock delay trim adjustment with stopping feature for eliminating differential delay between clock signal and analog signal
JP2648554B2 (ja) * 1992-08-13 1997-09-03 インターナショナル・ビジネス・マシーンズ・コーポレイション Ｐｒｍｌディスク駆動システムの非同期ゲイン調整方法および装置
US5424881A (en) * 1993-02-01 1995-06-13 Cirrus Logic, Inc. Synchronous read channel
US6092230A (en) * 1993-09-15 2000-07-18 Motorola, Inc. Method and apparatus for detecting bad frames of information in a communication system
US5491698A (en) * 1993-12-16 1996-02-13 International Business Machines Corporation Setting optimal boundary thresholds in a decoder for coded signal processing channels
US5430745A (en) * 1994-02-17 1995-07-04 International Business Machines Corporation Prejudging current state in a decoder for coded signal processing channels
US5619539A (en) * 1994-02-28 1997-04-08 International Business Machines Corporation Data detection methods and apparatus for a direct access storage device
US6002538A (en) * 1994-03-18 1999-12-14 Fujitsu, Ltd. PRML regenerating apparatus having adjusted slice levels
DE19549402C2 (de) * 1994-03-18 2003-09-11 Fujitsu Ltd Phasensynchronisationsschaltung (PLL) in einer PRML-Regenerationsvorrichtung
US5426541A (en) * 1994-03-31 1995-06-20 International Business Machines Corporation Self-equalization method for partial-response maximum-likelihood disk drive systems
US5559840A (en) * 1994-09-27 1996-09-24 Inernational Business Machines Corporation Digital timing recovery method and apparatus for a coded data channel
US5594436A (en) * 1994-10-21 1997-01-14 International Business Machines Corporation Signal processing channel with high data rate and low power consumption
JP2830776B2 (ja) * 1995-05-26 1998-12-02 日本電気株式会社 高密度記録向けクロック抽出方式
US5638065A (en) 1995-06-13 1997-06-10 International Business Machines Corporation Maximum-likelihood symbol detection for RLL-coded data
US6429986B1 (en) 1995-09-07 2002-08-06 International Business Machines Corporation Data storage to enhance timing recovery in high density magnetic recording
JPH09198809A (ja) * 1996-01-22 1997-07-31 Internatl Business Mach Corp <Ibm> エラー伝搬を防ぐ復号器
US5931968A (en) 1996-02-09 1999-08-03 Overland Data, Inc. Digital data recording channel
US5995561A (en) * 1996-04-10 1999-11-30 Silicon Systems, Inc. Method and apparatus for reducing noise correlation in a partial response channel
US5844920A (en) * 1996-11-07 1998-12-01 Cirrus Logic, Inc. Thermal asperity compensation using multiple sync marks for retroactive and split segment data synchronization in a magnetic disk storage system
US5966262A (en) * 1997-03-31 1999-10-12 Regents Of University Of Mn Method and apparatus for high data rate detection for three dimensional 110 channels
US5956195A (en) * 1997-03-31 1999-09-21 Regents Of The University Of Minnesota Method and apparatus for three dimensional sequence estimation in partially constrained binary channels
US6154870A (en) * 1997-06-04 2000-11-28 Seagate Technology Llc Signal error-correction system and method
US6233714B1 (en) 1998-07-29 2001-05-15 International Business Machines Corporation Generalized method and means for defining and operating a (d, k) partial-response ML detector of binary-coded sequences
US6597526B1 (en) 1998-08-14 2003-07-22 Overland Storage, Inc. Magnetic tape drive apparatus including a variable rate encoder
GB2363667B (en) 1999-04-21 2003-06-18 Seagate Technology Llc Method and apparatus for correcting digital asymmetric read signals
US6418101B1 (en) 1999-09-03 2002-07-09 Zen Research (Ireland), Ltd. Digital read channel for optical disk reader
US6580768B1 (en) 1999-11-09 2003-06-17 International Business Machines Corporation Adaptive maximum likelihood detection
JP4100878B2 (ja) * 2001-05-31 2008-06-11 富士通株式会社 データ再生装置に用いられるクロック調整装置、オフセット検出装置及びデータ再生装置
TWI227020B (en) * 2002-05-29 2005-01-21 Via Optical Solution Inc Signal correcting device and method
CN117194130B (zh) * 2023-11-03 2024-02-02 北京开源芯片研究院 信号状态信息的展示方法、装置、电子设备及存储介质

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413251A (en) * 1981-07-16 1983-11-01 International Business Machines Corporation Method and apparatus for generating a noiseless sliding block code for a (1,7) channel with rate 2/3
US4463344A (en) * 1981-12-31 1984-07-31 International Business Machines Corporation Method and apparatus for generating a noiseless sliding block code for a (2,7) channel with rate 1/2
US4504872A (en) * 1983-02-08 1985-03-12 Ampex Corporation Digital maximum likelihood detector for class IV partial response
GB8513218D0 (en) * 1985-05-24 1985-06-26 Emi Ltd Signal receiver
FR2585906B1 (fr) * 1985-08-02 1987-09-25 Battail Gerard Procede de decodage d'un code convolutif et decodeur correspondant
JPH0824270B2 (ja) * 1985-12-25 1996-03-06 日本電信電話株式会社 たたみ込み符号器および最尤復号器
CA1260143A (en) * 1986-02-24 1989-09-26 Atsushi Yamashita Path trace viterbi decoder
US4823346A (en) * 1986-04-16 1989-04-18 Hitachi, Ltd. Maximum likelihood decoder

Also Published As

Publication number Publication date
EP0369962A2 (de) 1990-05-23
US4945538A (en) 1990-07-31
JPH02182032A (ja) 1990-07-16
DE68925347D1 (de) 1996-02-15
EP0369962B1 (de) 1996-01-03
JPH0817331B2 (ja) 1996-02-21
EP0369962A3 (de) 1993-10-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee