[go: up one dir, main page]

FR2312887A1 - Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede - Google Patents

Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede

Info

Publication number
FR2312887A1
FR2312887A1 FR7516404A FR7516404A FR2312887A1 FR 2312887 A1 FR2312887 A1 FR 2312887A1 FR 7516404 A FR7516404 A FR 7516404A FR 7516404 A FR7516404 A FR 7516404A FR 2312887 A1 FR2312887 A1 FR 2312887A1
Authority
FR
France
Prior art keywords
compression rate
high compression
transmission system
several times
data 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
FR7516404A
Other languages
English (en)
Other versions
FR2312887B1 (fr
Inventor
Thaddeus Hawkes
Alexandre Bech
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7516404A priority Critical patent/FR2312887A1/fr
Publication of FR2312887A1 publication Critical patent/FR2312887A1/fr
Application granted granted Critical
Publication of FR2312887B1 publication Critical patent/FR2312887B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/93—Run-length coding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code
    • H03M7/4025—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code constant length to or from Morse code conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Dc Digital Transmission (AREA)
FR7516404A 1975-05-27 1975-05-27 Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede Granted FR2312887A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7516404A FR2312887A1 (fr) 1975-05-27 1975-05-27 Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7516404A FR2312887A1 (fr) 1975-05-27 1975-05-27 Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede

Publications (2)

Publication Number Publication Date
FR2312887A1 true FR2312887A1 (fr) 1976-12-24
FR2312887B1 FR2312887B1 (fr) 1977-12-09

Family

ID=9155697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7516404A Granted FR2312887A1 (fr) 1975-05-27 1975-05-27 Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede

Country Status (1)

Country Link
FR (1) FR2312887A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1547613A (fr) * 1966-10-03 1968-11-29 Xerox Corp Procédé de codage par longueurs de trains en cascade et circuit correspondant
US3863248A (en) * 1973-01-02 1975-01-28 Univ Sherbrooke Digital compressor-expander

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1547613A (fr) * 1966-10-03 1968-11-29 Xerox Corp Procédé de codage par longueurs de trains en cascade et circuit correspondant
US3863248A (en) * 1973-01-02 1975-01-28 Univ Sherbrooke Digital compressor-expander

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
*REVUE "INTERNATIONALE ELEKTRONISCHE RUNDSCHAU", VOLUME 27, NO. 1, JANVIER 1973, PAGES 12 A 18. ARTICLE: "EIN ADAPTIVER INTRAFRAME-CODIERER FUR FERNSEHSIGNALE", PAR WENDLAND ET MAY. *
REVUE "ABSTRACTS OF I.E.C.E. TRANSACTIONS", VOLUME 58, NO. 2, FEVRIER 1975, PAGES 3-4. ARTICLE: "A VARIABLE SAMPLING RATE CODING TECHNIQUE", PAR TAKASHI KAWADE ET AL. *

Also Published As

Publication number Publication date
FR2312887B1 (fr) 1977-12-09

Similar Documents

Publication Publication Date Title
JPS5244512A (en) Between-frame coding equipment
JPS524103A (en) Digital signal transmission system and its equipment
ES425145A1 (es) Un metodo para convertir una senal de datos en codigo bina-rio en otra senal en codigo de dos impulsos con la misma po-laridad y otros dos con polaridad opuesta por cada bit.
CA1025125A (fr) Signalisation numerique dans un systeme de transmission a modulation par impulsions codees
CA964766A (en) Differential pulse code modulation system employing periodic modulator step modification
CA990856A (en) System for the transmission of signals by pulse code modulation
FR2312887A1 (fr) Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede
AU463268B2 (en) Communication system for the transmission of information between two terminal stations by pulse code modulation
ES389960A1 (es) Circuito intermedio entre lineas de transmision analogicas o digitales y un equipo pcm multiplex en tiempo.
GB1467237A (en) Asynchronous data transmission system
CA999991A (en) Code multiplex data transmission method
ES8303853A1 (es) Procedimiento para la transformacion de senales vocales subdivididas, en secuencias de senales, para la retransmision codificada.
JPS57136845A (en) Coding and transfer system of information data
HU175310B (hu) Sposob perenesenija s kodovoj moduljaciej neskol'kikh soprovozhdajuhhikh zvukovikh signalov pri pomohhi televizionnogo signala
CA933682A (en) Time division multiplex system for the transmission of signals by means of pulse code modulation
JPS5252313A (en) Transmission system
JPS5286709A (en) Companding estimate code decoding circuit
JPS5248424A (en) Transmission system of binary signal
CA1036261A (fr) Systeme de telecommande a porteuse codee
JPS5420612A (en) Transmssion system for coded signal
FR2314618A1 (fr) Procede de codage differentiel par impulsions codees du type dpcm a intervalles variables et systeme de transmission de donnees utilisant un tel procede
JPS51142209A (en) Method for coding a run-length of binary video data
JPS5252086A (en) Transmitting method
CA874655A (en) Coded signal transmission system
JPS51113506A (en) Synchronizing equipment for digital code transmission

Legal Events

Date Code Title Description
ST Notification of lapse