DK429276A - Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden - Google Patents

Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden

Info

Publication number
DK429276A
DK429276A DK429276A DK429276A DK429276A DK 429276 A DK429276 A DK 429276A DK 429276 A DK429276 A DK 429276A DK 429276 A DK429276 A DK 429276A DK 429276 A DK429276 A DK 429276A
Authority
DK
Denmark
Prior art keywords
procedure
decoding
cycle
code signal
double frequency
Prior art date
Application number
DK429276A
Other languages
Danish (da)
English (en)
Inventor
J Touzet
Original Assignee
Transac Dev Transact Automat
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 Transac Dev Transact Automat filed Critical Transac Dev Transact Automat
Publication of DK429276A publication Critical patent/DK429276A/da

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/016—Synchronisation of sensing process
    • 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)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DK429276A 1975-09-24 1976-09-23 Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden DK429276A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7529259A FR2326082A1 (fr) 1975-09-24 1975-09-24 Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede

Publications (1)

Publication Number Publication Date
DK429276A true DK429276A (da) 1977-03-25

Family

ID=9160385

Family Applications (1)

Application Number Title Priority Date Filing Date
DK429276A DK429276A (da) 1975-09-24 1976-09-23 Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden

Country Status (7)

Country Link
BE (1) BE845971A (fr)
DE (1) DE2642422A1 (fr)
DK (1) DK429276A (fr)
FR (1) FR2326082A1 (fr)
IT (1) IT1072410B (fr)
LU (1) LU75819A1 (fr)
NL (1) NL7610590A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506543B1 (fr) * 1981-05-22 1986-12-05 Thomson Csf Dispositif de decodage d'un signal code sur une seule voie et notamment d'informations lues a vitesse variable et/ou inscrites a densite variable

Also Published As

Publication number Publication date
FR2326082B1 (fr) 1978-03-17
FR2326082A1 (fr) 1977-04-22
LU75819A1 (fr) 1977-05-13
IT1072410B (it) 1985-04-10
DE2642422A1 (de) 1977-03-31
NL7610590A (nl) 1977-03-28
BE845971A (fr) 1977-03-09

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DK429276A (da) Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden