ES2160770T3 - Deteccion de simbolos con maxima probabilidad para datos codificados en rll. - Google Patents

Deteccion de simbolos con maxima probabilidad para datos codificados en rll.

Info

Publication number
ES2160770T3
ES2160770T3 ES96304352T ES96304352T ES2160770T3 ES 2160770 T3 ES2160770 T3 ES 2160770T3 ES 96304352 T ES96304352 T ES 96304352T ES 96304352 T ES96304352 T ES 96304352T ES 2160770 T3 ES2160770 T3 ES 2160770T3
Authority
ES
Spain
Prior art keywords
vector
vectors
current state
state
rll
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 - Lifetime
Application number
ES96304352T
Other languages
English (en)
Inventor
Martin Aureliano Hassner
Tetsuya Tamura
Shmuel Winograd
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
Application granted granted Critical
Publication of ES2160770T3 publication Critical patent/ES2160770T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B20/14—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Dc Digital Transmission (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PROCESO PARALELO ML DE UNA SEÑAL ANALOGA EN UN CANAL CODIFICADO RLL EN EL QUE (1) VECTORES DE UNA CONDICION ACTUAL DEL CANAL Y DE LA SIGUIENTE CONDICION DEL CANAL, SE CALCULAN UTILIZANDO COEFICIENTES DE TRANSFORMACION DE VECTOR WALSH DE LA SEÑAL ANALOGA; (2) VECTORES DE LA CONDICION ACTUAL Y VECTORES DE LA CONDICION SIGUIENTE Y VALORES DE VECTORES PRECALCULADOS EN FILTROS COMBINADOS ANALOGOS, SE UTILIZAN PARA GENERAR PRODUCTOS DE ESCALA DE VECTORES, QUE SE COMPARAN CON VALORES DE UMBRAL PRESELECCIONADOS, PARA GENERAR SALIDAS DE DECISION BINARIAS, QUE SE UTILIZAN EN MAQUINAS DIGITALES DE CONDICIONES SECUENCIALES FINITAS, PARA GENERAR DECISIONES DE SIMBOLOS ML; Y (3) LAS DECISIONES DE SIMBOLO ML SE VUELVEN A ALIMENTAR Y SE UTILIZAN PARA SUSTRAER EL VALOR DE INTERFERENCIA ENTRE SIMBOLOS DEL VECTOR DE LA CONDICION ACTUAL, DEL VECTOR DE LA SIGUIENTE CONDICION, PARA TRANSFORMAR EL VECTOR DE LA CONDICION SIGUIENTE EN UN VECTOR DE CONDICION PRESENTE ACTUALIZADO.
ES96304352T 1995-06-13 1996-06-10 Deteccion de simbolos con maxima probabilidad para datos codificados en rll. Expired - Lifetime ES2160770T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/489,863 US5638065A (en) 1995-06-13 1995-06-13 Maximum-likelihood symbol detection for RLL-coded data

Publications (1)

Publication Number Publication Date
ES2160770T3 true ES2160770T3 (es) 2001-11-16

Family

ID=23945578

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96304352T Expired - Lifetime ES2160770T3 (es) 1995-06-13 1996-06-10 Deteccion de simbolos con maxima probabilidad para datos codificados en rll.

Country Status (9)

Country Link
US (1) US5638065A (es)
EP (1) EP0749123B1 (es)
JP (1) JP3329185B2 (es)
KR (1) KR100230554B1 (es)
CN (1) CN1077713C (es)
AT (1) ATE205012T1 (es)
DE (1) DE69614772T2 (es)
ES (1) ES2160770T3 (es)
SG (1) SG42404A1 (es)

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US5854809A (en) * 1996-04-29 1998-12-29 Eastman Kodak Company Data recovery method and apparatus for jitter tolerant peak detected channels
KR100243218B1 (ko) * 1997-07-10 2000-02-01 윤종용 데이터 복호장치와 그 방법
JP3998307B2 (ja) * 1997-12-25 2007-10-24 富士通株式会社 磁気ディスク装置及び磁気ディスク装置のエラー訂正方法
US6115418A (en) 1998-02-09 2000-09-05 National Semiconductor Corporation Simplified equalizer for twisted pair channel
US7034719B2 (en) 2002-09-27 2006-04-25 Samsung Electronics Co., Ltd. Data modulating method and apparatus, data demodulating method and apparatus, and code arranging 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
US6415003B1 (en) 1998-09-11 2002-07-02 National Semiconductor Corporation Digital baseline wander correction circuit
US6438163B1 (en) 1998-09-25 2002-08-20 National Semiconductor Corporation Cable length and quality indicator
US6418172B1 (en) * 1999-04-21 2002-07-09 National Semiconductor Corporation Look-ahead maximum likelihood sequence estimation decoder
US7254198B1 (en) 2000-04-28 2007-08-07 National Semiconductor Corporation Receiver system having analog pre-filter and digital equalizer
US7050517B1 (en) 2000-04-28 2006-05-23 National Semiconductor Corporation System and method suitable for receiving gigabit ethernet signals
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
TW565829B (en) * 2002-03-19 2003-12-11 Via Tech Inc Method and device for recovering decoded data
CN1729528A (zh) * 2002-10-23 2006-02-01 松下电器产业株式会社 频率和相位控制装置以及最大似然解码器
US6819512B2 (en) 2003-02-18 2004-11-16 Protoscience, Inc. Triple-attribute method of encoding and decoding magnetic data
US8284870B1 (en) * 2006-02-07 2012-10-09 Link—A—Media Devices Corporation Timing loop
US12423559B2 (en) * 2016-04-15 2025-09-23 Cambricon Technologies Corporation Limited Apparatus and methods for forward propagation in neural networks supporting discrete data

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US4403331A (en) * 1981-05-01 1983-09-06 Microdyne Corporation Method and apparatus for transmitting data over limited bandwidth channels
DE3422828A1 (de) * 1984-06-20 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Datenempfaenger fuer aufgezeichnete daten
US4888779A (en) * 1988-03-18 1989-12-19 International Business Machines Corporation Matched spectral null trellis codes for partial response channels
US4945538A (en) * 1988-11-14 1990-07-31 International Business Machines Corporation Method and apparatus for processing sample values in a coded signal processing channel
EP0463752A3 (en) * 1990-06-29 1993-02-03 Digital Equipment Corporation Pattern matching circuit
US5138314A (en) * 1990-07-18 1992-08-11 Sony Corporation Method for converting and/or detecting data
JPH05234279A (ja) * 1992-02-24 1993-09-10 Sony Corp 最尤復号装置及びこれを用いた再生データ復調装置
US5381359A (en) * 1992-08-27 1995-01-10 Quantum Corporation Adaptation and training of digital finite impulse response filter within PRML sampling data detection channel
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5491698A (en) * 1993-12-16 1996-02-13 International Business Machines Corporation Setting optimal boundary thresholds in a decoder for coded signal processing channels
EP0684605B1 (en) * 1994-05-23 1999-10-06 STMicroelectronics S.r.l. Parallel architecture PRML device for processing signals from a magnetic head during a reading step of data stored on a magnetic support

Also Published As

Publication number Publication date
JPH097311A (ja) 1997-01-10
CN1077713C (zh) 2002-01-09
JP3329185B2 (ja) 2002-09-30
KR970003107A (ko) 1997-01-28
EP0749123B1 (en) 2001-08-29
EP0749123A2 (en) 1996-12-18
SG42404A1 (en) 1997-08-15
EP0749123A3 (en) 1998-03-11
CN1143809A (zh) 1997-02-26
ATE205012T1 (de) 2001-09-15
DE69614772T2 (de) 2002-07-04
KR100230554B1 (ko) 1999-11-15
US5638065A (en) 1997-06-10
DE69614772D1 (de) 2001-10-04

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