IT1022975B - Sistema di alta sicurezza di registrazione o di restituzione di informazioni digitali su nastro magnetico in cassette - Google Patents

Sistema di alta sicurezza di registrazione o di restituzione di informazioni digitali su nastro magnetico in cassette

Info

Publication number
IT1022975B
IT1022975B IT2854174A IT2854174A IT1022975B IT 1022975 B IT1022975 B IT 1022975B IT 2854174 A IT2854174 A IT 2854174A IT 2854174 A IT2854174 A IT 2854174A IT 1022975 B IT1022975 B IT 1022975B
Authority
IT
Italy
Prior art keywords
cassette
recording
return
magnetic tape
security system
Prior art date
Application number
IT2854174A
Other languages
English (en)
Italian (it)
Original Assignee
Centre Nat Etd Telecomm
Schlumberger Inst System
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 Centre Nat Etd Telecomm, Schlumberger Inst System filed Critical Centre Nat Etd Telecomm
Application granted granted Critical
Publication of IT1022975B publication Critical patent/IT1022975B/it

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)
IT2854174A 1973-10-19 1974-10-17 Sistema di alta sicurezza di registrazione o di restituzione di informazioni digitali su nastro magnetico in cassette IT1022975B (it)

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
IT1022975B true IT1022975B (it) 1978-04-20

Family

ID=26217991

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2854174A IT1022975B (it) 1973-10-19 1974-10-17 Sistema di alta sicurezza di registrazione o di restituzione di informazioni digitali su nastro magnetico in cassette

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)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2079516B (en) * 1980-06-25 1985-05-22 Sundstrand Data Control Recording digital data

Also Published As

Publication number Publication date
NL7413576A (nl) 1975-04-22
CH589341A5 (en:Method) 1977-06-30
DE2449715A1 (de) 1975-06-12
GB1490206A (en) 1977-10-26

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