FR2326082A1 - Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede - Google Patents

Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede

Info

Publication number
FR2326082A1
FR2326082A1 FR7529259A FR7529259A FR2326082A1 FR 2326082 A1 FR2326082 A1 FR 2326082A1 FR 7529259 A FR7529259 A FR 7529259A FR 7529259 A FR7529259 A FR 7529259A FR 2326082 A1 FR2326082 A1 FR 2326082A1
Authority
FR
France
Prior art keywords
message
decoder
converts
counters
reference pulse
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
FR7529259A
Other languages
English (en)
French (fr)
Other versions
FR2326082B1 (enExample
Inventor
Jacques Touzet
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.)
Compagnie pour le Developpment des Transactions Automatiques TRANSAC
Original Assignee
Compagnie pour le Developpment des Transactions Automatiques TRANSAC
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 Compagnie pour le Developpment des Transactions Automatiques TRANSAC filed Critical Compagnie pour le Developpment des Transactions Automatiques TRANSAC
Priority to FR7529259A priority Critical patent/FR2326082A1/fr
Priority to SE7602420A priority patent/SE7602420L/xx
Priority to BE1007613A priority patent/BE845971A/xx
Priority to LU75819A priority patent/LU75819A1/xx
Priority to DE19762642422 priority patent/DE2642422A1/de
Priority to IT2753476A priority patent/IT1072410B/it
Priority to NL7610590A priority patent/NL7610590A/xx
Priority to DK429276A priority patent/DK429276A/da
Publication of FR2326082A1 publication Critical patent/FR2326082A1/fr
Application granted granted Critical
Publication of FR2326082B1 publication Critical patent/FR2326082B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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)
FR7529259A 1975-02-25 1975-09-24 Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede Granted FR2326082A1 (fr)

Priority Applications (8)

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
SE7602420A SE7602420L (sv) 1975-02-25 1976-02-25 Anordning for att infora gas i en vetska
BE1007613A BE845971A (fr) 1975-09-24 1976-09-09 Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede
LU75819A LU75819A1 (enExample) 1975-09-24 1976-09-17
DE19762642422 DE2642422A1 (de) 1975-09-24 1976-09-21 Dekodierverfahren fuer einen doppelfrequenzkode und vorrichtung zur anwendung des verfahrens
IT2753476A IT1072410B (it) 1975-09-24 1976-09-23 Procedimento di decodificazione di un codice a doppia frequenza e dispositivo per la sua messa in opera
NL7610590A NL7610590A (nl) 1975-09-24 1976-09-23 Werkwijze en inrichting voor het decoderen van een dubbele frekwentiecode.
DK429276A DK429276A (da) 1975-09-24 1976-09-23 Fremgangsmade til afkodning af et dobbeltfrekvent kodesignal samt kredslob til udovelse af fremgangsmaden

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 (2)

Publication Number Publication Date
FR2326082A1 true FR2326082A1 (fr) 1977-04-22
FR2326082B1 FR2326082B1 (enExample) 1978-03-17

Family

ID=9160385

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7529259A Granted FR2326082A1 (fr) 1975-02-25 1975-09-24 Procede de decodage d'un code double frequence et dispositif pour la mise en oeuvre du procede

Country Status (7)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506543A1 (fr) * 1981-05-22 1982-11-26 Tech Electro Cie Indle 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506543A1 (fr) * 1981-05-22 1982-11-26 Tech Electro Cie Indle 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 (enExample) 1978-03-17
BE845971A (fr) 1977-03-09
DE2642422A1 (de) 1977-03-31
LU75819A1 (enExample) 1977-05-13
DK429276A (da) 1977-03-25
IT1072410B (it) 1985-04-10
NL7610590A (nl) 1977-03-28

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Legal Events

Date Code Title Description
ST Notification of lapse