ES2024938A6 - Procedimiento de codificacion, transmision y descodificacion de telecopias y aparatos emisor y receptor para la puesta en practica de este procedimiento. - Google Patents

Procedimiento de codificacion, transmision y descodificacion de telecopias y aparatos emisor y receptor para la puesta en practica de este procedimiento.

Info

Publication number
ES2024938A6
ES2024938A6 ES9002770A ES9002770A ES2024938A6 ES 2024938 A6 ES2024938 A6 ES 2024938A6 ES 9002770 A ES9002770 A ES 9002770A ES 9002770 A ES9002770 A ES 9002770A ES 2024938 A6 ES2024938 A6 ES 2024938A6
Authority
ES
Spain
Prior art keywords
transmission
level
sequence
bits
documents
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.)
Expired - Lifetime
Application number
ES9002770A
Other languages
English (en)
Inventor
Philippe Charbonnier
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.)
Sagem SA
Original Assignee
Sagem 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 Sagem SA filed Critical Sagem SA
Publication of ES2024938A6 publication Critical patent/ES2024938A6/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/419—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which encoding of the length of a succession of picture-elements of the same value along a scanning line is the only encoding step

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Facsimile Transmission Control (AREA)
  • Communication Control (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PROCEDIMIENTO DE CODIFICACION, TRANSMISION Y DESCODIFICACION DE TELECOPIAS Y APARATOS EMISOR Y RECEPTOR PARA LA PUESTA EN PRACTICA DE ESTE PROCEDIMIENTO. EL DOCUMENTO PARA EMITIR SE DESCOMPONE EN UNA SERIE DE LINEAS DE PIXELES. POR EL LADO DE LA EMISION, CADA LINEA BLANCA SE CODIFICA (103) CON UN UNICO BIT EN ESTADO 1 Y CADA LINEA NO BLANCA SE CODIFICA (104) CON UNA PLURALIDAD DE BITS QUE COMIENZA POR UN BIT EN ESTADO 0, PROSIGUE CON LOS BITS QUE CORRESPONDEN AL CONTENIDO DE LA LINEA Y TERMINA POR UNA PALABRA DE SINCRONIZACION (EOL). LA TRANSMISION SE REALIZA (105 A 107) SEGUN UN PROCEDIMIENTO QUE PERMITE LA CORRECCION DE LOS ERRORES DE TRANSMISION. POR EL LADO DE LA RECEPCION, CUALQUIER SERIE DE BITS EN ESTADO 1 QUE SIGUE INMEDIATAMENTE A UNA PALABRA DE SINCRONIZACION, SE DESCODIFICA CON UNA SERIE DE LAS MISMAS LINEAS BLANCAS Y EL BIT EN ESTADO 0 QUE SIGUE A TAL SERIE ASI COMO TODO BIT EN ESTADO 0 QUE SIGUE A UNA PALABRA DE SINCRONIZACION, SE DESCODIFICA CON UNA LINEA NO BLANCA.
ES9002770A 1989-10-31 1990-10-31 Procedimiento de codificacion, transmision y descodificacion de telecopias y aparatos emisor y receptor para la puesta en practica de este procedimiento. Expired - Lifetime ES2024938A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8914269A FR2653958B3 (fr) 1989-10-31 1989-10-31 Procede de codage, de transmission et de decodage pour telecopies, appareil d'emission et appareil de reception pour la mise en óoeuvre de ce procede.

Publications (1)

Publication Number Publication Date
ES2024938A6 true ES2024938A6 (es) 1992-03-01

Family

ID=9386960

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9002770A Expired - Lifetime ES2024938A6 (es) 1989-10-31 1990-10-31 Procedimiento de codificacion, transmision y descodificacion de telecopias y aparatos emisor y receptor para la puesta en practica de este procedimiento.

Country Status (6)

Country Link
BE (1) BE1005376A0 (es)
DE (1) DE4034675A1 (es)
ES (1) ES2024938A6 (es)
FR (1) FR2653958B3 (es)
GB (1) GB2239764B (es)
IT (1) IT1241308B (es)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127516C2 (de) * 1971-06-03 1982-04-29 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur Übertragung binärcodierter Signale von Bildvorlagen oder Schriftvorlagen
US4058674A (en) * 1973-03-27 1977-11-15 Kabushiki Kaisha Ricoh Graphic information compression method and system
JPS5541015A (en) * 1978-09-18 1980-03-22 Hitachi Ltd Signal processing method in high speed facsimile
JPS59168768A (ja) * 1983-03-15 1984-09-22 Canon Inc フアクシミリ同報装置
GB2146874A (en) * 1983-08-26 1985-04-24 British Telecomm Decoding of minimum redundancy codes
JPS61194934A (ja) * 1985-02-22 1986-08-29 Nec Corp デ−タ通信中継装置
JPS62101173A (ja) * 1985-10-28 1987-05-11 Nec Corp デ−タ再送方式

Also Published As

Publication number Publication date
IT1241308B (it) 1994-01-10
GB2239764B (en) 1993-12-15
DE4034675A1 (de) 1991-06-06
GB2239764A (en) 1991-07-10
FR2653958B3 (fr) 1991-10-18
GB9023653D0 (en) 1990-12-12
BE1005376A0 (fr) 1993-07-06
FR2653958A3 (fr) 1991-05-03
IT9067838A0 (it) 1990-10-30
IT9067838A1 (it) 1992-04-30

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20001009