FR2361699A1 - CYCLIC REDUNDANCY CONTROL METHOD AND DEVICE FOR COMPUTERS - Google Patents

CYCLIC REDUNDANCY CONTROL METHOD AND DEVICE FOR COMPUTERS

Info

Publication number
FR2361699A1
FR2361699A1 FR7724812A FR7724812A FR2361699A1 FR 2361699 A1 FR2361699 A1 FR 2361699A1 FR 7724812 A FR7724812 A FR 7724812A FR 7724812 A FR7724812 A FR 7724812A FR 2361699 A1 FR2361699 A1 FR 2361699A1
Authority
FR
France
Prior art keywords
data
character
cyclic redundancy
computers
control method
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
FR7724812A
Other languages
French (fr)
Other versions
FR2361699B1 (en
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems Inc
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 Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Publication of FR2361699A1 publication Critical patent/FR2361699A1/en
Application granted granted Critical
Publication of FR2361699B1 publication Critical patent/FR2361699B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit

Landscapes

  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Detection And Correction Of Errors (AREA)
  • Error Detection And Correction (AREA)
  • Executing Machine-Instructions (AREA)

Abstract

L'invention concerne un dispositif pour générer un caractère de contrôle par redondance dans un ordinateur universel et un procédé pour générer ce caractère. Le procédé selon l'invention utilise l'équipement fixe 401, 402 d'un ordinateur pour générer un caractère de contrôle par redondance cyclique chaque fois qu'une unité de donnée est transmise, ce caractère étant enchaîné à droite de la donnée transmise et, chaque fois que la donnée particulière est requise, le caractère de contrôle et la donnée à laquelle il est associé sont manipulés de la même façon que pour générer le caractère de contrôle. Si la donnée reçue est la même que la donnée transmise le résultat de cette manipulation est zéro.The invention relates to a device for generating a redundancy check character in a universal computer and to a method for generating this character. The method according to the invention uses the fixed equipment 401, 402 of a computer to generate a cyclic redundancy check character each time a data unit is transmitted, this character being chained to the right of the transmitted data and, each time the particular data is required, the check character and the data with which it is associated are handled in the same way as to generate the check character. If the data received is the same as the data transmitted, the result of this manipulation is zero.

FR7724812A 1976-08-12 1977-08-11 CYCLIC REDUNDANCY CONTROL METHOD AND DEVICE FOR COMPUTERS Granted FR2361699A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71407476A 1976-08-12 1976-08-12

Publications (2)

Publication Number Publication Date
FR2361699A1 true FR2361699A1 (en) 1978-03-10
FR2361699B1 FR2361699B1 (en) 1984-12-28

Family

ID=24868662

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724812A Granted FR2361699A1 (en) 1976-08-12 1977-08-11 CYCLIC REDUNDANCY CONTROL METHOD AND DEVICE FOR COMPUTERS

Country Status (6)

Country Link
JP (1) JPS6027420B2 (en)
AU (1) AU2770077A (en)
CA (1) CA1099022A (en)
DE (1) DE2735806A1 (en)
FR (1) FR2361699A1 (en)
GB (1) GB1541539A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429466A1 (en) * 1978-06-21 1980-01-18 Data General Corp ERROR CORRECTION CIRCUIT FOR DATA PROCESSING SYSTEMS

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1366833A (en) * 1973-01-26 1974-09-11 Post Office Telemunications systems

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1366833A (en) * 1973-01-26 1974-09-11 Post Office Telemunications systems

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EXBK/72 *
EXBK/76 *
EXBK/78 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429466A1 (en) * 1978-06-21 1980-01-18 Data General Corp ERROR CORRECTION CIRCUIT FOR DATA PROCESSING SYSTEMS

Also Published As

Publication number Publication date
GB1541539A (en) 1979-03-07
DE2735806A1 (en) 1978-02-16
JPS6027420B2 (en) 1985-06-28
CA1099022A (en) 1981-04-07
JPS5322341A (en) 1978-03-01
FR2361699B1 (en) 1984-12-28
AU2770077A (en) 1979-02-15

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Legal Events

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