DE69929212D1 - Erweitertes rauschvorhersagendes maximal-wahrscheinlichkeits (npml) -datendetektionsverfahren und gerät für eine speichereinheit mit direktem zugriff (dasd) - Google Patents

Erweitertes rauschvorhersagendes maximal-wahrscheinlichkeits (npml) -datendetektionsverfahren und gerät für eine speichereinheit mit direktem zugriff (dasd)

Info

Publication number
DE69929212D1
DE69929212D1 DE69929212T DE69929212T DE69929212D1 DE 69929212 D1 DE69929212 D1 DE 69929212D1 DE 69929212 T DE69929212 T DE 69929212T DE 69929212 T DE69929212 T DE 69929212T DE 69929212 D1 DE69929212 D1 DE 69929212D1
Authority
DE
Germany
Prior art keywords
npml
dasd
storage unit
raw material
direct access
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
DE69929212T
Other languages
English (en)
Other versions
DE69929212T2 (de
Inventor
S Bush
D Cideciyan
D Coker
S Eleftheriou
L Galbraith
J Stanek
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.)
HGST Netherlands BV
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
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 Hitachi Global Storage Technologies Netherlands BV filed Critical Hitachi Global Storage Technologies Netherlands BV
Publication of DE69929212D1 publication Critical patent/DE69929212D1/de
Application granted granted Critical
Publication of DE69929212T2 publication Critical patent/DE69929212T2/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
    • 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
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • 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
DE69929212T 1998-08-31 1999-08-31 Erweitertes rauschvorhersagendes maximal-wahrscheinlichkeits (npml) -datendetektionsverfahren und gerät für eine speichereinheit mit direktem zugriff (dasd) Expired - Fee Related DE69929212T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US144230 1998-08-31
US09/144,230 US6158027A (en) 1998-08-31 1998-08-31 Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD)
PCT/US1999/019910 WO2000013179A1 (en) 1998-08-31 1999-08-31 Enhanced noise-predictive maximum likelihood (npml) data detection method and apparatus for direct access storage device (dasd)

Publications (2)

Publication Number Publication Date
DE69929212D1 true DE69929212D1 (de) 2006-02-02
DE69929212T2 DE69929212T2 (de) 2006-07-27

Family

ID=22507649

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69929212T Expired - Fee Related DE69929212T2 (de) 1998-08-31 1999-08-31 Erweitertes rauschvorhersagendes maximal-wahrscheinlichkeits (npml) -datendetektionsverfahren und gerät für eine speichereinheit mit direktem zugriff (dasd)

Country Status (10)

Country Link
US (1) US6158027A (de)
EP (1) EP1110216B1 (de)
JP (1) JP3483854B2 (de)
KR (1) KR100379670B1 (de)
CN (1) CN1322508C (de)
DE (1) DE69929212T2 (de)
HU (1) HUP0103435A3 (de)
MY (1) MY122342A (de)
TW (1) TW448424B (de)
WO (1) WO2000013179A1 (de)

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US6732328B1 (en) * 1999-07-12 2004-05-04 Maxtor Corporation Two stage detector having viterbi detector matched to a channel and post processor matched to a channel code
US6460150B1 (en) * 2000-03-02 2002-10-01 International Business Machines Corporation Noise-predictive post-processing for PRML data channel
US7404131B2 (en) * 2001-01-22 2008-07-22 Maxtor Corporation High efficiency, error minimizing coding strategy method and apparatus
WO2003030168A1 (en) 2001-10-02 2003-04-10 Seagate Technology Llc Method and apparatus for detecting media defects
EP1404050B1 (de) * 2002-09-25 2011-11-09 Samsung Electronics Co., Ltd. Eingangs-/Ausgangsschaltung zur gleichzeitigen, bidirektionalen Übertragung
US7292630B2 (en) * 2003-04-17 2007-11-06 Texas Instruments Incorporated Limit-cycle-free FIR/IIR halfband digital filter with shared registers for high-speed sigma-delta A/D and D/A converters
US7173784B2 (en) * 2003-10-10 2007-02-06 Hitachi Global Storage Technologies Netherlands B.V. Apparatus for providing data dependent detection in a data read channel
US7589927B2 (en) * 2005-08-30 2009-09-15 International Business Machines Corporation Dynamically adapting a read channel equalizer
US7522367B2 (en) * 2005-11-23 2009-04-21 International Business Machines Corporation Asynchronous read channel shaped toward generalized partial response characteristics
KR20090091023A (ko) * 2008-02-22 2009-08-26 톰슨 라이센싱 채널 검출을 위한 방법 및 장치
US8077764B2 (en) * 2009-01-27 2011-12-13 International Business Machines Corporation 16-state adaptive noise predictive maximum-likelihood detection system
US8670199B2 (en) 2010-04-02 2014-03-11 International Business Machines Corporation Data-dependent noise-predictive maximum likelihood detection (DD-NPML) for magnetic recording
RU2012102842A (ru) 2012-01-27 2013-08-10 ЭлЭсАй Корпорейшн Инкрементное обнаружение преамбулы
US8982992B2 (en) * 2011-10-27 2015-03-17 Lsi Corporation Block-based crest factor reduction (CFR)
US9923595B2 (en) 2013-04-17 2018-03-20 Intel Corporation Digital predistortion for dual-band power amplifiers
US9813223B2 (en) 2013-04-17 2017-11-07 Intel Corporation Non-linear modeling of a physical system using direct optimization of look-up table values
US9130599B2 (en) * 2013-12-24 2015-09-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Systems and methods of converting detector output to multi-level soft information
US9093083B1 (en) 2014-10-01 2015-07-28 Seagate Technology Llc Adaptive read channel system for different noise types
TWI654074B (zh) * 2015-02-12 2019-03-21 台灣奈米碳素股份有限公司 Method for producing composite material containing carbon material by using high energy thrust
CN105005743B (zh) * 2015-06-11 2018-02-02 深圳市华傲数据技术有限公司 电话号码漂白和反向漂白方法
US10445171B2 (en) 2016-02-29 2019-10-15 Seagate Technology Llc On-the-fly error detection algorithm during retry procedure
US9991990B1 (en) * 2017-06-08 2018-06-05 International Business Machines Corporation Sequence detection

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US4707681A (en) * 1986-04-24 1987-11-17 International Business Machines Corporation Method and apparatus for implementing optimum PRML codes
US4786890A (en) * 1987-07-28 1988-11-22 International Business Machines Corporation Method and apparatus for implementing a PRML code
DE68920739T2 (de) * 1989-08-16 1995-06-29 Ibm Daten-Kodierung für den Sofortstart von PRML-Empfängern.
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
US5233482A (en) * 1991-07-31 1993-08-03 International Business Machines Corporation Thermal asperity compensation for PRML data detection
US5196849A (en) * 1992-01-31 1993-03-23 International Business Machines Corporation Method and apparatus for implementing PRML codes with maximum ones
US5258940A (en) * 1992-03-16 1993-11-02 International Business Machines Corporation Distributed arithmetic digital filter in a partial-response maximum-likelihood disk drive system
US5392295A (en) * 1992-07-30 1995-02-21 International Business Machines Corporation Error measurement circuit
US5268848A (en) * 1992-09-30 1993-12-07 International Business Machines Corporation Equalizer adjustment for partial-response maximum-likelihood disk drive systems
US5343340A (en) * 1992-12-31 1994-08-30 International Business Machines Corporation Digital servo signal demodulation method and apparatus utilizing a partial-response maximum-likelihood (PRML) channel in a disk file
WO1994029989A1 (en) * 1993-06-14 1994-12-22 International Business Machines Corporation Adaptive noise-predictive partial-response equalization for channels with spectral nulls
US5442492A (en) * 1993-06-29 1995-08-15 International Business Machines Corporation Data recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detection
US5619539A (en) * 1994-02-28 1997-04-08 International Business Machines Corporation Data detection methods and apparatus for a direct access storage device
US5426541A (en) * 1994-03-31 1995-06-20 International Business Machines Corporation Self-equalization method for partial-response maximum-likelihood disk drive systems
US5521945A (en) * 1995-06-30 1996-05-28 Quantum Corporation Reduced complexity EPR4 post-processor for sampled data detection
US5635933A (en) * 1995-06-30 1997-06-03 Quantum Corporation Rate 16/17 (d=0,G=6/I=7) modulation code for a magnetic recording channel
US5784010A (en) * 1997-02-03 1998-07-21 International Business Machines Corporation Method and apparatus for implementing a set rate code for data channels with alternate 9-bit code words and 8-bit code words
US5949831A (en) * 1997-05-21 1999-09-07 International Business Machines Corporation Method and apparatus for data detection for PRML data channels

Also Published As

Publication number Publication date
JP3483854B2 (ja) 2004-01-06
US6158027A (en) 2000-12-05
HUP0103435A3 (en) 2003-05-28
EP1110216B1 (de) 2005-12-28
EP1110216A1 (de) 2001-06-27
CN1315039A (zh) 2001-09-26
KR20010072417A (ko) 2001-07-31
CN1322508C (zh) 2007-06-20
DE69929212T2 (de) 2006-07-27
WO2000013179A1 (en) 2000-03-09
TW448424B (en) 2001-08-01
JP2002524812A (ja) 2002-08-06
KR100379670B1 (ko) 2003-04-10
HUP0103435A2 (hu) 2002-01-28
MY122342A (en) 2006-04-29

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8339 Ceased/non-payment of the annual fee