GB1490206A - High-reliability digital data read/write system for magnetic tape in cassettes - Google Patents

High-reliability digital data read/write system for magnetic tape in cassettes

Info

Publication number
GB1490206A
GB1490206A GB4501874A GB4501874A GB1490206A GB 1490206 A GB1490206 A GB 1490206A GB 4501874 A GB4501874 A GB 4501874A GB 4501874 A GB4501874 A GB 4501874A GB 1490206 A GB1490206 A GB 1490206A
Authority
GB
United Kingdom
Prior art keywords
character
characters
preamble
circuit
parity
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
Application number
GB4501874A
Other languages
English (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.)
Fr Ministry Of Posts & Telecom
Compteurs Schlumberger SA
Original Assignee
Fr Ministry Of Posts & Telecom
Compteurs Schlumberger SA
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 FR7337499A external-priority patent/FR2248574A1/fr
Priority claimed from FR7434335A external-priority patent/FR2295513A2/fr
Application filed by Fr Ministry Of Posts & Telecom, Compteurs Schlumberger SA filed Critical Fr Ministry Of Posts & Telecom
Publication of GB1490206A publication Critical patent/GB1490206A/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
    • G11B20/1816—Testing
    • 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
    • G11B20/1803—Error detection or correction; Testing, e.g. of drop-outs by redundancy in data representation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB4501874A 1973-10-19 1974-10-17 High-reliability digital data read/write system for magnetic tape in cassettes Expired GB1490206A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7337499A FR2248574A1 (en) 1973-10-19 1973-10-19 System for recording numerical programme on magnetic tape - has counter determining period double that of introduction sign, with detection and verification
FR7434335A FR2295513A2 (fr) 1974-10-11 1974-10-11 Systeme de haute securite d'enregistrement ou de restitution d'informations numeriques sur bande magnetique en cassette

Publications (1)

Publication Number Publication Date
GB1490206A true GB1490206A (en) 1977-10-26

Family

ID=26217991

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4501874A Expired GB1490206A (en) 1973-10-19 1974-10-17 High-reliability digital data read/write system for magnetic tape in cassettes

Country Status (5)

Country Link
CH (1) CH589341A5 (en:Method)
DE (1) DE2449715A1 (en:Method)
GB (1) GB1490206A (en:Method)
IT (1) IT1022975B (en:Method)
NL (1) NL7413576A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136614A (en) * 1980-06-25 1984-09-19 Sundstrand Data Control Recording digital date

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136614A (en) * 1980-06-25 1984-09-19 Sundstrand Data Control Recording digital date

Also Published As

Publication number Publication date
DE2449715A1 (de) 1975-06-12
CH589341A5 (en:Method) 1977-06-30
IT1022975B (it) 1978-04-20
NL7413576A (nl) 1975-04-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921017