FR2090793A5 - - Google Patents

Info

Publication number
FR2090793A5
FR2090793A5 FR7114979A FR7114979A FR2090793A5 FR 2090793 A5 FR2090793 A5 FR 2090793A5 FR 7114979 A FR7114979 A FR 7114979A FR 7114979 A FR7114979 A FR 7114979A FR 2090793 A5 FR2090793 A5 FR 2090793A5
Authority
FR
France
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
FR7114979A
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.)
Olivetti SpA
Original Assignee
Olivetti SpA
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 IT6826471A external-priority patent/IT994518B/it
Application filed by Olivetti SpA filed Critical Olivetti SpA
Application granted granted Critical
Publication of FR2090793A5 publication Critical patent/FR2090793A5/fr
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
    • G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
FR7114979A 1970-04-27 1971-04-27 Expired FR2090793A5 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6842970 1970-04-27
IT6826471A IT994518B (it) 1971-04-16 1971-04-16 Perfezionamenti ai sistemi di auto adattamento della sinoronizzazione per la lettura di supporti di re gistrazione mobili

Publications (1)

Publication Number Publication Date
FR2090793A5 true FR2090793A5 (fr) 1972-01-14

Family

ID=26329891

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7114979A Expired FR2090793A5 (fr) 1970-04-27 1971-04-27

Country Status (2)

Country Link
FR (1) FR2090793A5 (fr)
GB (1) GB1312753A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443170A1 (fr) * 1974-11-08 1980-06-27 Ibm Procede de codage de donnees en code f2f, et procede et appareil pour l'interpretation de ces donnees
FR2446561A1 (fr) * 1974-12-31 1980-08-08 Ibm Procede et appareil pour l'interpretation des donnees codees en code f2f

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443170A1 (fr) * 1974-11-08 1980-06-27 Ibm Procede de codage de donnees en code f2f, et procede et appareil pour l'interpretation de ces donnees
FR2446561A1 (fr) * 1974-12-31 1980-08-08 Ibm Procede et appareil pour l'interpretation des donnees codees en code f2f

Also Published As

Publication number Publication date
GB1312753A (en) 1973-04-04

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Legal Events

Date Code Title Description
ST Notification of lapse