FR2408247A1 - METHOD AND DEVICE FOR TRANSMISSION AND RECORDING OF A DIGITAL DATA SIGNAL - Google Patents

METHOD AND DEVICE FOR TRANSMISSION AND RECORDING OF A DIGITAL DATA SIGNAL

Info

Publication number
FR2408247A1
FR2408247A1 FR7831204A FR7831204A FR2408247A1 FR 2408247 A1 FR2408247 A1 FR 2408247A1 FR 7831204 A FR7831204 A FR 7831204A FR 7831204 A FR7831204 A FR 7831204A FR 2408247 A1 FR2408247 A1 FR 2408247A1
Authority
FR
France
Prior art keywords
recording
digital data
data signal
signal
transmission
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
FR7831204A
Other languages
French (fr)
Other versions
FR2408247B1 (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.)
Discovision Associates
Original Assignee
MCA Discovision Inc
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 MCA Discovision Inc filed Critical MCA Discovision Inc
Publication of FR2408247A1 publication Critical patent/FR2408247A1/en
Application granted granted Critical
Publication of FR2408247B1 publication Critical patent/FR2408247B1/fr
Granted 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
    • G11B20/14—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
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

L'INVENTION CONCERNE UN PROCEDE ET UN DISPOSITIF DE TRANSMISSION ET D'ENREGISTREMENT D'UN SIGNAL DE DONNEES NUMERIQUES. UN SIGNAL DE DONNEES NUMERIQUES EN CODE SANS-RETOUR-A-ZERO EST CODE PAR DES TRANSITIONS DE NIVEAU APPARAISSANT ENTRE DES CELLULES DE DONNEES OU AU MILIEU DE CERTAINES DE CES CELLULES. LE SIGNAL AINSI CODE CONTIENT SUFFISAMMENT D'INFORMATIONS POUR RESTITUER LE SIGNAL INITIAL. AU DECODAGE, LES TRANSITIONS DE NIVEAU SONT EXAMINEES ET DES INDICES DE DECODAGE SONT PRODUITS, SUFFISANTS POUR IDENTIFIER TOUS LES BITS "1" DU SIGNAL INITIAL. L'INVENTION S'APPLIQUE NOTAMMENT A L'ENREGISTREMENT DES SIGNAUX NUMERIQUES SOUS UNE DENSITE OPTIMALE.The invention relates to a method and a device for transmitting and recording a digital data signal. A NON-RETURN-TO-ZERO CODE DIGITAL DATA SIGNAL IS ENCODED BY LEVEL TRANSITIONS OCCURRING BETWEEN DATA CELLS OR IN THE MIDDLE OF CERTAIN CELLS. THE SIGNAL THUS CODE CONTAINS ENOUGH INFORMATION TO RESTITUTE THE INITIAL SIGNAL. ON DECODING, LEVEL TRANSITIONS ARE EXAMINED AND DECODING INDICES ARE PRODUCED SUFFICIENT TO IDENTIFY ALL "1" BITS OF THE INITIAL SIGNAL. THE INVENTION APPLIES IN PARTICULAR TO THE RECORDING OF DIGITAL SIGNALS UNDER OPTIMAL DENSITY.

FR7831204A 1977-11-04 1978-11-03 METHOD AND DEVICE FOR TRANSMISSION AND RECORDING OF A DIGITAL DATA SIGNAL Granted FR2408247A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84855077A 1977-11-04 1977-11-04
AU82947/82A AU530226B2 (en) 1977-11-04 1982-04-22 Digital decoder

Publications (2)

Publication Number Publication Date
FR2408247A1 true FR2408247A1 (en) 1979-06-01
FR2408247B1 FR2408247B1 (en) 1984-03-09

Family

ID=25640103

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7831204A Granted FR2408247A1 (en) 1977-11-04 1978-11-03 METHOD AND DEVICE FOR TRANSMISSION AND RECORDING OF A DIGITAL DATA SIGNAL

Country Status (9)

Country Link
JP (1) JPS5474715A (en)
AU (2) AU523034B2 (en)
BE (1) BE871748A (en)
CA (1) CA1136279A (en)
CH (1) CH647366A5 (en)
DE (1) DE2847833C2 (en)
FR (1) FR2408247A1 (en)
GB (1) GB2011229B (en)
NL (1) NL7810901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571910A1 (en) * 1984-10-16 1986-04-18 Bull Sa Encoding and decoding method and device for the serial transmission of binary data with suppression of the DC component

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209908A (en) * 1987-09-15 1989-05-24 Plessey Co Plc A bi-phase modulator
GB2287622B (en) * 1994-03-17 1998-10-28 Nissan Motor Multiplex serial data communication circuit network and method and motor control system and method using multiplex serial data communication circuit network
CN117352020A (en) * 2022-06-29 2024-01-05 长鑫存储技术有限公司 Clock control circuit and semiconductor memory

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142344A5 (en) * 1971-06-18 1973-01-26 Honeywell Inf Systems
GB1323299A (en) * 1970-03-16 1973-07-11 British Aircraft Corp Ltd Data recording methods and apparatus
US3815122A (en) * 1973-01-02 1974-06-04 Gte Information Syst Inc Data converting apparatus
US3988729A (en) * 1975-01-29 1976-10-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Differential pulse code modulation
GB1470547A (en) * 1973-06-22 1977-04-14 Thomson Csf System for transition-coding binary information
US4027335A (en) * 1976-03-19 1977-05-31 Ampex Corporation DC free encoding for data transmission system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323299A (en) * 1970-03-16 1973-07-11 British Aircraft Corp Ltd Data recording methods and apparatus
FR2142344A5 (en) * 1971-06-18 1973-01-26 Honeywell Inf Systems
US3815122A (en) * 1973-01-02 1974-06-04 Gte Information Syst Inc Data converting apparatus
GB1470547A (en) * 1973-06-22 1977-04-14 Thomson Csf System for transition-coding binary information
US3988729A (en) * 1975-01-29 1976-10-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Differential pulse code modulation
US4027335A (en) * 1976-03-19 1977-05-31 Ampex Corporation DC free encoding for data transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571910A1 (en) * 1984-10-16 1986-04-18 Bull Sa Encoding and decoding method and device for the serial transmission of binary data with suppression of the DC component

Also Published As

Publication number Publication date
DE2847833A1 (en) 1979-05-10
AU4114478A (en) 1980-05-01
GB2011229B (en) 1982-08-11
AU530226B2 (en) 1983-07-07
FR2408247B1 (en) 1984-03-09
AU523034B2 (en) 1982-07-08
GB2011229A (en) 1979-07-04
CH647366A5 (en) 1985-01-15
NL7810901A (en) 1979-05-08
DE2847833C2 (en) 1986-01-09
CA1136279A (en) 1982-11-23
JPS5474715A (en) 1979-06-15
BE871748A (en) 1979-05-03
AU8294782A (en) 1982-09-02

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property
ST Notification of lapse