DE3888418T2 - PRML-Kodierung. - Google Patents
PRML-Kodierung.Info
- Publication number
- DE3888418T2 DE3888418T2 DE3888418T DE3888418T DE3888418T2 DE 3888418 T2 DE3888418 T2 DE 3888418T2 DE 3888418 T DE3888418 T DE 3888418T DE 3888418 T DE3888418 T DE 3888418T DE 3888418 T2 DE3888418 T2 DE 3888418T2
- Authority
- DE
- Germany
- Prior art keywords
- prml
- coding
- prml coding
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
- H03M5/02—Conversion to or from representation by pulses
- H03M5/04—Conversion to or from representation by pulses the pulses having two levels
- H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code
- H03M5/145—Conversion to or from block codes or representations thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Error Detection And Correction (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/078,731 US4786890A (en) | 1987-07-28 | 1987-07-28 | Method and apparatus for implementing a PRML code |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3888418D1 DE3888418D1 (de) | 1994-04-21 |
DE3888418T2 true DE3888418T2 (de) | 1994-10-06 |
Family
ID=22145889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3888418T Expired - Fee Related DE3888418T2 (de) | 1987-07-28 | 1988-05-20 | PRML-Kodierung. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4786890A (de) |
EP (1) | EP0301191B1 (de) |
JP (1) | JPH01119120A (de) |
CA (1) | CA1308811C (de) |
DE (1) | DE3888418T2 (de) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4888775A (en) * | 1988-03-18 | 1989-12-19 | International Business Machines Corporation | Trellis codes for partial response channels |
US4888779A (en) * | 1988-03-18 | 1989-12-19 | International Business Machines Corporation | Matched spectral null trellis codes for partial response channels |
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 |
US5243605A (en) * | 1991-07-11 | 1993-09-07 | Storage Technology Corporation | Modified viterbi detector with run-length code constraint |
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 |
US5257272A (en) * | 1992-04-15 | 1993-10-26 | International Business Machines Corporation | Time-varying modulo N trellis codes for input restricted partial response channels |
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 |
US5255131A (en) * | 1992-08-13 | 1993-10-19 | International Business Machines Corporation | Asynchronous servo identification/address mark detection for PRML disk drive ssytem |
US5260703A (en) * | 1992-08-27 | 1993-11-09 | Quantum Corporation | Data encoding and decoding within PRML class IV sampling data detection channel of disk drive |
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 |
US5424881A (en) | 1993-02-01 | 1995-06-13 | Cirrus Logic, Inc. | Synchronous read channel |
US5353170A (en) * | 1993-05-19 | 1994-10-04 | International Business Machines Corporation | Error recovery data storage system and method with two position read verification |
JPH07220398A (ja) * | 1994-02-03 | 1995-08-18 | Fujitsu Ltd | 記録信号再生方法及びその装置 |
US5619539A (en) * | 1994-02-28 | 1997-04-08 | International Business Machines Corporation | Data detection methods and apparatus for a direct access storage device |
DE19549399B4 (de) * | 1994-03-18 | 2004-03-04 | Fujitsu Ltd., Kawasaki | Phasensynchronisationsschaltung |
US6002538A (en) * | 1994-03-18 | 1999-12-14 | Fujitsu, Ltd. | PRML regenerating apparatus having adjusted slice levels |
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 |
US5544178A (en) * | 1994-06-10 | 1996-08-06 | Cirrus Logic, Inc. | Method and apparatus for encoding data in a PRML class-IV digital communication channel |
US5671252A (en) * | 1994-09-21 | 1997-09-23 | Analog Devices, Inc. | Sampled data read channel utilizing charge-coupled devices |
JP3456781B2 (ja) | 1995-02-06 | 2003-10-14 | 富士通株式会社 | 磁気記録再生装置の復調回路 |
DE69535160T2 (de) * | 1995-09-18 | 2007-06-28 | Hitachi Global Storage Technologies Netherlands B.V. | Vorrichtung und verfahren zur rauschvorhersagenden maximal-wahrscheinlichkeitsdetektion |
US5790571A (en) * | 1995-12-11 | 1998-08-04 | Seagate Technology, Inc. | Coding data in a disc drive according to a code having desired algebraic characteristics |
US5949831A (en) * | 1997-05-21 | 1999-09-07 | International Business Machines Corporation | Method and apparatus for data detection for PRML data channels |
KR100450782B1 (ko) * | 1997-08-27 | 2004-11-16 | 삼성전자주식회사 | 고밀도 데이타 저장기기를 위한 피알엠엘 코드의 부호화 및복호화 방법 |
KR100281738B1 (ko) | 1998-07-13 | 2001-02-15 | 이계철 | 니블 반전 및 블록 반전 부호의 부호화 및 복호화 방법, 그 부호 및 복호장치 |
US6158027A (en) * | 1998-08-31 | 2000-12-05 | International Business Machines Corporation | Enhanced noise-predictive maximum likelihood (NPML) data detection method and apparatus for direct access storage device (DASD) |
US6175457B1 (en) | 1998-10-06 | 2001-01-16 | International Business Machines Corporation | Dual polarity thermal asperity detector for direct access storage device (DASD) |
US6137643A (en) * | 1998-10-06 | 2000-10-24 | International Business Machines Corporation | Thermal asperity detection with long magnet rejection for direct access storage device (DASD) |
US6430713B1 (en) | 1999-06-30 | 2002-08-06 | International Business Machines Corporation | System and method for constructing low complexity block coders |
IT1316796B1 (it) * | 2000-03-09 | 2003-05-12 | St Microelectronics Srl | Dispositivo circuitale per recuperare la simmetria di un segnaleanalogico ricavato da una lettura di dati da supporti magnetici |
KR100384886B1 (ko) * | 2000-10-10 | 2003-05-22 | 주식회사 케이티 | 니블 반전 부호 활용 방법 및 그 장치 |
US7142134B2 (en) * | 2005-02-01 | 2006-11-28 | Hitachi Global Storage Technologies Netherlands B.V. | Techniques for generating modulation codes using running substitutions |
JP6768739B2 (ja) | 2018-05-22 | 2020-10-14 | 矢崎総業株式会社 | 防水コネクタ及び防水コネクタ構造 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4567464A (en) * | 1983-01-28 | 1986-01-28 | International Business Machines Corporation | Fixed rate constrained channel code generating and recovery method and means having spectral nulls for pilot signal insertion |
JPS6048645A (ja) * | 1983-08-29 | 1985-03-16 | Sony Corp | 情報変換装置 |
JPH0721942B2 (ja) * | 1984-10-11 | 1995-03-08 | ソニー株式会社 | チヤンネル符号化方法 |
US4707681A (en) * | 1986-04-24 | 1987-11-17 | International Business Machines Corporation | Method and apparatus for implementing optimum PRML codes |
-
1987
- 1987-07-28 US US07/078,731 patent/US4786890A/en not_active Expired - Lifetime
-
1988
- 1988-05-20 DE DE3888418T patent/DE3888418T2/de not_active Expired - Fee Related
- 1988-05-20 JP JP63122235A patent/JPH01119120A/ja active Granted
- 1988-05-20 EP EP88108140A patent/EP0301191B1/de not_active Expired - Lifetime
- 1988-07-15 CA CA000572185A patent/CA1308811C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0301191A3 (en) | 1990-07-04 |
DE3888418D1 (de) | 1994-04-21 |
EP0301191B1 (de) | 1994-03-16 |
US4786890A (en) | 1988-11-22 |
EP0301191A2 (de) | 1989-02-01 |
JPH0319735B2 (de) | 1991-03-15 |
CA1308811C (en) | 1992-10-13 |
JPH01119120A (ja) | 1989-05-11 |
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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 |