FR2419543A1 - DEVICE TO DETECT AND CORRECT SEVERAL ERROR TRACKS IN A MEMORY UNIT - Google Patents

DEVICE TO DETECT AND CORRECT SEVERAL ERROR TRACKS IN A MEMORY UNIT

Info

Publication number
FR2419543A1
FR2419543A1 FR7902411A FR7902411A FR2419543A1 FR 2419543 A1 FR2419543 A1 FR 2419543A1 FR 7902411 A FR7902411 A FR 7902411A FR 7902411 A FR7902411 A FR 7902411A FR 2419543 A1 FR2419543 A1 FR 2419543A1
Authority
FR
France
Prior art keywords
memory unit
parity check
check bits
detect
tracks
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.)
Granted
Application number
FR7902411A
Other languages
French (fr)
Other versions
FR2419543B1 (en
Inventor
Arvind M 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
Priority claimed from US05/884,463 external-priority patent/US4205324A/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2419543A1 publication Critical patent/FR2419543A1/en
Application granted granted Critical
Publication of FR2419543B1 publication Critical patent/FR2419543B1/en
Expired 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Error Detection And Correction (AREA)
  • Detection And Correction Of Errors (AREA)

Abstract

Dispositif pour détecter et corriger les erreurs dans une unité de mémoire à pistes parallèles 5. Des bits de contrôle de parité verticale sont codés et enregistrés dans une première piste redondante et tandis que des bits de contrôle de parité diagonale calculés suivant des directions à pente positive ou négative sont codés et enregistrés dans un format choisi dans un groupe de formats. Les données correctes sont restituées en déterminant des syndromes à partir des bits de contrôle de parité et des données. Ce dispositif permet de corriger simultanément plusieurs pistes en erreur dans une mémoire à pistes de données parallèles.Device for detecting and correcting errors in a parallel track memory unit 5. Vertical parity check bits are encoded and recorded in a first redundant track and while diagonal parity check bits calculated in positive sloped directions or negative are encoded and saved in a format chosen from a group of formats. Correct data is returned by determining syndromes from the parity check bits and the data. This device makes it possible to simultaneously correct several erroneous tracks in a memory with parallel data tracks.

FR7902411A 1978-03-07 1979-01-25 DEVICE FOR DETECTING AND CORRECTING MULTIPLE TRACKS IN ERROR IN A MEMORY UNIT Expired FR2419543B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/884,463 US4205324A (en) 1977-12-23 1978-03-07 Methods and means for simultaneously correcting several channels in error in a parallel multi channel data system using continuously modifiable syndromes and selective generation of internal channel pointers

Publications (2)

Publication Number Publication Date
FR2419543A1 true FR2419543A1 (en) 1979-10-05
FR2419543B1 FR2419543B1 (en) 1986-08-22

Family

ID=25384679

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7902411A Expired FR2419543B1 (en) 1978-03-07 1979-01-25 DEVICE FOR DETECTING AND CORRECTING MULTIPLE TRACKS IN ERROR IN A MEMORY UNIT

Country Status (4)

Country Link
JP (1) JPS54118748A (en)
DE (1) DE2908373A1 (en)
FR (1) FR2419543B1 (en)
GB (1) GB2016178B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040004A1 (en) * 1979-10-24 1981-05-07 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka METHOD AND DEVICE FOR CODING CHECK WORDS OF LOW REDUNDANCY FROM ORIGIN DATA
JPS57183609A (en) * 1981-05-07 1982-11-12 Victor Co Of Japan Ltd Magnetic recording system of digital signal
CA1212437A (en) * 1983-03-04 1986-10-07 Radyne Corporation Data transmission system with error correcting data encoding
GB2149156B (en) * 1983-11-04 1987-10-21 Gen Electric Co Plc A method of encoding and decoding
JPH07107781B2 (en) * 1986-02-24 1995-11-15 松下電器産業株式会社 RAM address signal generation circuit
US4908826A (en) * 1988-01-05 1990-03-13 Digital Equipment Corporation Stored data error correction system
JP2003317400A (en) * 2003-02-14 2003-11-07 Fujitsu Ltd Controller for magnetic tape unit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387261A (en) * 1965-02-05 1968-06-04 Honeywell Inc Circuit arrangement for detection and correction of errors occurring in the transmission of digital data
FR1580315A (en) * 1968-05-27 1969-09-05
US3685016A (en) * 1969-10-29 1972-08-15 Honeywell Inc Array method and apparatus for encoding, detecting, and/or correcting data
US3958220A (en) * 1975-05-30 1976-05-18 International Business Machines Corporation Enhanced error correction
US4044328A (en) * 1976-06-22 1977-08-23 Bell & Howell Company Data coding and error correcting methods and apparatus
FR2412913A1 (en) * 1977-12-23 1979-07-20 Ibm ERROR DETECTION AND CORRECTION DEVICE FOR PARALLEL TRACK MEMORY

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387261A (en) * 1965-02-05 1968-06-04 Honeywell Inc Circuit arrangement for detection and correction of errors occurring in the transmission of digital data
FR1580315A (en) * 1968-05-27 1969-09-05
US3685016A (en) * 1969-10-29 1972-08-15 Honeywell Inc Array method and apparatus for encoding, detecting, and/or correcting data
US3958220A (en) * 1975-05-30 1976-05-18 International Business Machines Corporation Enhanced error correction
US4044328A (en) * 1976-06-22 1977-08-23 Bell & Howell Company Data coding and error correcting methods and apparatus
FR2412913A1 (en) * 1977-12-23 1979-07-20 Ibm ERROR DETECTION AND CORRECTION DEVICE FOR PARALLEL TRACK MEMORY

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *
EXBK/76 *

Also Published As

Publication number Publication date
GB2016178B (en) 1982-05-06
DE2908373A1 (en) 1979-09-20
JPS54118748A (en) 1979-09-14
DE2908373C2 (en) 1989-05-11
FR2419543B1 (en) 1986-08-22
GB2016178A (en) 1979-09-19
JPS6343833B2 (en) 1988-09-01

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Legal Events

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