DE19882726T1 - Verfahren und Vorrichtung zum Erfassen von Daten beim Magnetaufzeichnen unter Verwendung von Entscheidungsrückkopplung - Google Patents

Verfahren und Vorrichtung zum Erfassen von Daten beim Magnetaufzeichnen unter Verwendung von Entscheidungsrückkopplung

Info

Publication number
DE19882726T1
DE19882726T1 DE19882726T DE19882726T DE19882726T1 DE 19882726 T1 DE19882726 T1 DE 19882726T1 DE 19882726 T DE19882726 T DE 19882726T DE 19882726 T DE19882726 T DE 19882726T DE 19882726 T1 DE19882726 T1 DE 19882726T1
Authority
DE
Germany
Prior art keywords
magnetic recording
recording data
decision feedback
capturing magnetic
capturing
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.)
Withdrawn
Application number
DE19882726T
Other languages
English (en)
Inventor
Bernardo Rub
Hamid R Shafiee
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.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 Seagate Technology LLC filed Critical Seagate Technology LLC
Publication of DE19882726T1 publication Critical patent/DE19882726T1/de
Withdrawn legal-status Critical Current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
    • G11B20/10009—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
    • 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
    • G11B20/10009—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
    • 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
    • H03M13/3961—Arrangements of methods for branch or transition metric calculation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE19882726T 1997-10-08 1998-09-10 Verfahren und Vorrichtung zum Erfassen von Daten beim Magnetaufzeichnen unter Verwendung von Entscheidungsrückkopplung Withdrawn DE19882726T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6266297P 1997-10-08 1997-10-08
PCT/US1998/018908 WO1999018658A1 (en) 1997-10-08 1998-09-10 Method and apparatus for detecting data in magnetic recording using decision feedback

Publications (1)

Publication Number Publication Date
DE19882726T1 true DE19882726T1 (de) 2000-09-07

Family

ID=22044004

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19882726T Withdrawn DE19882726T1 (de) 1997-10-08 1998-09-10 Verfahren und Vorrichtung zum Erfassen von Daten beim Magnetaufzeichnen unter Verwendung von Entscheidungsrückkopplung

Country Status (7)

Country Link
US (1) US6201840B1 (de)
JP (1) JP2001519583A (de)
KR (1) KR100572901B1 (de)
CN (1) CN1201479C (de)
DE (1) DE19882726T1 (de)
GB (1) GB2346305B (de)
WO (1) WO1999018658A1 (de)

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US6535552B1 (en) * 1999-05-19 2003-03-18 Motorola, Inc. Fast training of equalizers in discrete multi-tone (DMT) systems
US7404131B2 (en) * 2001-01-22 2008-07-22 Maxtor Corporation High efficiency, error minimizing coding strategy method and apparatus
US6788482B2 (en) * 2001-06-29 2004-09-07 Infineon Technologies Ag Method and apparatus for Viterbi detector state metric re-normalization
US6771442B2 (en) 2001-06-29 2004-08-03 Infineon Technologies Ag Off-track interference emulator
US7522678B2 (en) * 2002-04-18 2009-04-21 Infineon Technologies Ag Method and apparatus for a data-dependent noise predictive viterbi
US7290200B2 (en) * 2002-07-12 2007-10-30 Stmicroelectronics, Inc. E2PR4 viterbi detector and method for adding a branch metric to the path metric of the surviving path after selecting the surviving path
US7346836B2 (en) * 2002-07-12 2008-03-18 Stmicroelectronics, Inc. E2PR4 viterbi detector and method for adding a branch metric to the path metric of the surviving path while selecting the surviving path
US7158324B2 (en) * 2004-09-20 2007-01-02 Guzik Technical Enterprises Self-adjusting PRML receiver
US7430084B2 (en) * 2004-12-03 2008-09-30 International Business Machines Corporation Magnetic tape read channel signal values developed employing intermediate bits of the path memory of a PRML viterbi detector
US8199800B2 (en) * 2008-08-04 2012-06-12 Seagate Technology Llc Off-track aware equalizer design for bit-patterned media
US8077764B2 (en) * 2009-01-27 2011-12-13 International Business Machines Corporation 16-state adaptive noise predictive maximum-likelihood detection system
US9177596B2 (en) 2012-03-29 2015-11-03 Panasonic Intellectual Property Management Co., Ltd. Decoding device and decoding method

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GB2117164B (en) 1982-02-25 1985-09-04 Racal Recorders Ltd Automatic calibration arrangement for a tape recorder
US4571734A (en) 1983-08-05 1986-02-18 International Business Machines Corporation Method and apparatus for decoding the output signal of a partial-response class-IV communication or recording-device channel
US4802174A (en) * 1986-02-19 1989-01-31 Sony Corporation Viterbi decoder with detection of synchronous or asynchronous states
US5121262A (en) 1989-10-12 1992-06-09 Conner Peripherals, Inc. Disk drive system employing adaptive read/write channel controls and method of using same
JPH03195129A (ja) 1989-12-22 1991-08-26 Mitsubishi Electric Corp 最尤系列推定装置
JP2637591B2 (ja) 1990-01-22 1997-08-06 松下電器産業株式会社 位置認識装置及びその方法
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
US5311376A (en) 1991-06-11 1994-05-10 Western Digital (Singapore) Pte Information detecting system
US5502735A (en) * 1991-07-16 1996-03-26 Nokia Mobile Phones (U.K.) Limited Maximum likelihood sequence detector
WO1993002844A1 (en) 1991-07-26 1993-02-18 Peter Campbell Pty. Ltd. Improved blade shaft drive for machines having rotary cutting or abrading tools
US5291499A (en) 1992-03-16 1994-03-01 Cirrus Logic, Inc. Method and apparatus for reduced-complexity viterbi-type sequence detectors
JP3258067B2 (ja) 1992-03-25 2002-02-18 株式会社東芝 最尤系列推定方式
US5392295A (en) 1992-07-30 1995-02-21 International Business Machines Corporation Error measurement circuit
US5341387A (en) 1992-08-27 1994-08-23 Quantum Corporation Viterbi detector having adjustable detection thresholds for PRML class IV sampling data detection
US5341249A (en) 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
JP3470341B2 (ja) 1992-11-13 2003-11-25 ソニー株式会社 ディジタル信号再生回路
JP2522142B2 (ja) * 1992-12-25 1996-08-07 日本電気株式会社 ビタビ復号器の同期検出方式
US5349608A (en) 1993-03-29 1994-09-20 Stanford Telecommunications, Inc. Viterbi ACS unit with renormalization
US5383064A (en) 1993-04-13 1995-01-17 Wangtek, Inc. Automatic closed loop adjustment of analog read signals under microprocessor control
US5390198A (en) 1993-05-26 1995-02-14 The Boeing Company Soft decision viterbi decoder for M-ary convolutional codes
US5521767A (en) 1993-09-17 1996-05-28 Quantum Corporation Optimized equalizer system for data recovery and timing extraction in partial response read channels
US5454014A (en) 1993-11-16 1995-09-26 At&T Corp. Digital signal processor
US5355261A (en) 1993-12-20 1994-10-11 Guzik Technical Enterprises, Inc. Method and apparatus for measuring error rate of magnetic recording devices having a partial response maximum likelihood data detection channel
US5576707A (en) 1994-06-10 1996-11-19 Cirrus Logic, Inc. Method and apparatus for detecting and decoding data in a PRML class-IV digital communication channel
US5583889A (en) * 1994-07-08 1996-12-10 Zenith Electronics Corporation Trellis coded modulation system for HDTV
US5502935A (en) * 1994-07-18 1996-04-02 Demmer; Albert J. Roof to ceiling skylight apparatus
AU3364295A (en) 1994-08-10 1996-03-07 Maxtor Corporation A tuned viterbi detector and equalizer system
US5586128A (en) 1994-11-17 1996-12-17 Ericsson Ge Mobile Communications Inc. System for decoding digital data using a variable decision depth
US6124992A (en) 1995-02-08 2000-09-26 Seagate Technology Llc System and method for reconstructing a signal wave in a partial response read channel
US5859861A (en) * 1995-06-21 1999-01-12 Hyundai Electronics Ind. Co., Ltd. High speed viterbi decoder
US5521945A (en) * 1995-06-30 1996-05-28 Quantum Corporation Reduced complexity EPR4 post-processor for sampled data detection
JP3171772B2 (ja) * 1995-08-23 2001-06-04 沖電気工業株式会社 ビタビ復号方法及びビタビ復号装置
US5757855A (en) * 1995-11-29 1998-05-26 David Sarnoff Research Center, Inc. Data detection for partial response channels
US5841478A (en) * 1996-04-09 1998-11-24 Thomson Multimedia, S.A. Code sequence detection in a trellis decoder
WO1999008376A1 (en) * 1997-08-11 1999-02-18 Seagate Technology, Inc. Static viterbi detector for channels utilizing a code having time varying constraints

Also Published As

Publication number Publication date
KR100572901B1 (ko) 2006-04-24
US6201840B1 (en) 2001-03-13
GB2346305A (en) 2000-08-02
JP2001519583A (ja) 2001-10-23
GB0008664D0 (en) 2000-05-31
CN1275258A (zh) 2000-11-29
GB2346305B (en) 2002-11-20
CN1201479C (zh) 2005-05-11
WO1999018658A1 (en) 1999-04-15
KR20010024458A (ko) 2001-03-26

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: SEAGATE TECHNOLOGY LLC, SCOTTS VALLEY, CALIF., US

8139 Disposal/non-payment of the annual fee