FR2379956A1 - Systeme de communications a codage de signaux fac-similes - Google Patents

Systeme de communications a codage de signaux fac-similes

Info

Publication number
FR2379956A1
FR2379956A1 FR7803390A FR7803390A FR2379956A1 FR 2379956 A1 FR2379956 A1 FR 2379956A1 FR 7803390 A FR7803390 A FR 7803390A FR 7803390 A FR7803390 A FR 7803390A FR 2379956 A1 FR2379956 A1 FR 2379956A1
Authority
FR
France
Prior art keywords
signals
communications system
sequence
prediction
signal coding
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
FR7803390A
Other languages
English (en)
Other versions
FR2379956B1 (fr
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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
Priority claimed from JP52013432A external-priority patent/JPS5927501B2/ja
Priority claimed from JP52068233A external-priority patent/JPS5932028B2/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of FR2379956A1 publication Critical patent/FR2379956A1/fr
Application granted granted Critical
Publication of FR2379956B1 publication Critical patent/FR2379956B1/fr
Granted 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
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/004—Predictors, e.g. intraframe, interframe coding

Abstract

L'invention concerne un système de communications par codage pour des signaux fac-similés. Selon l'invention, un moyen permet d'obtenir séquentiellement des signaux de prédiction d'éléments de représentations imagées adjacents à des éléments objets selon une fonction de prédiction prédéterminée, un moyen compare ces signaux de prédiction à des signaux correspondants des éléments objets pour coder une séquence de signaux d'erreurs de prédiction et transmettre une séquence de signaux codés tels qu'un motif de symboles binaires S exprimé par m bits ayant chacun une valeur binaire de 0 a une longueur de code L de 1, un motif de symboles binaires ayant une valeur binaire de 1 dans la séquence a une longueur de code de m + 1, et ainsi de suite L'invention s'applique notamment à la transmission d'images et d'écritures.
FR7803390A 1977-02-08 1978-02-07 Systeme de communications a codage de signaux fac-similes Granted FR2379956A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP52013432A JPS5927501B2 (ja) 1977-02-08 1977-02-08 符号化装置
JP52068233A JPS5932028B2 (ja) 1977-06-08 1977-06-08 通信装置

Publications (2)

Publication Number Publication Date
FR2379956A1 true FR2379956A1 (fr) 1978-09-01
FR2379956B1 FR2379956B1 (fr) 1982-05-07

Family

ID=26349239

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803390A Granted FR2379956A1 (fr) 1977-02-08 1978-02-07 Systeme de communications a codage de signaux fac-similes

Country Status (4)

Country Link
US (1) US4191974A (fr)
DE (1) DE2805294C2 (fr)
FR (1) FR2379956A1 (fr)
GB (1) GB1594521A (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360840A (en) * 1980-05-13 1982-11-23 Am International, Inc. Real time data compression/decompression scheme for facsimile transmission system
US4369463A (en) * 1981-06-04 1983-01-18 International Business Machines Corporation Gray scale image data compression with code words a function of image history
JPS5846751A (ja) * 1981-09-11 1983-03-18 Sony Corp Ｚ値符号変調方法及び記録媒体
US4463386A (en) * 1982-05-03 1984-07-31 International Business Machines Corporation Facsimile data reduction
GB8708010D0 (en) * 1987-04-03 1987-05-07 Crosfield Electronics Ltd Image reprocessing
JPH0834432B2 (ja) * 1989-01-31 1996-03-29 三菱電機株式会社 符号化装置及び符号化方法
USRE35781E (en) * 1989-01-31 1998-05-05 Mitsubishi Denki Kabushiki Kaisha Coding method of image information
JPH0834434B2 (ja) * 1990-02-26 1996-03-29 三菱電機株式会社 符号化装置及び符号化方法
US6041144A (en) * 1991-09-17 2000-03-21 Canon Kabushiki Kaisha Image processing apparatus
US5631979A (en) * 1992-10-26 1997-05-20 Eastman Kodak Company Pixel value estimation technique using non-linear prediction
NL1000489C2 (nl) * 1995-06-02 1996-12-03 Oce Nederland Bv Werkwijze en inrichting voor comprimeren en decomprimeren van digitale beeldsignalen.
US6636641B1 (en) 1996-03-19 2003-10-21 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method and decoding method
US6744925B2 (en) 1996-03-19 2004-06-01 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method, and decoding method
EP0827342B1 (fr) * 1996-03-19 2013-02-27 Mitsubishi Denki Kabushiki Kaisha Codage d' images prédictif
WO1997035422A1 (fr) 1996-03-19 1997-09-25 Mitsubishi Denki Kabushiki Kaisha Codeur, decodeur, et procedes mis en oeuvre
KR100186582B1 (ko) * 1996-06-29 1999-05-01 김광호 해상도 자동 제어방법
JP3519416B2 (ja) 1997-01-29 2004-04-12 三菱電機株式会社 符号化装置及び復号装置
GB2388502A (en) * 2002-05-10 2003-11-12 Chris Dunn Compression of frequency domain audio signals

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2131083C3 (de) * 1971-06-23 1981-06-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Nachrichtenübertragungssystem
GB1432934A (en) * 1971-11-29 1976-04-22 Int Publishing Corp Ltd Method and apparatus for code communication
DE2255887C3 (de) * 1972-11-15 1981-02-26 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur Codierung von Bild-, insbesondere Faksimilesignalen
DE2432399C3 (de) * 1974-07-05 1980-07-31 Standard Elektrik Lorenz Ag, 7000 Stuttgart System zur digitalen Übertragung von Bildsignalen mittels Differenz-Pulscodemodulation (DPCM)
JPS5831791B2 (ja) * 1974-12-24 1983-07-08 オリンパス光学工業株式会社 画像情報帯域圧縮伝送装置
US4005411A (en) * 1974-12-30 1977-01-25 International Business Machines Corporation Compression of gray scale imagery to less than one bit per picture element
US4028731A (en) * 1975-09-29 1977-06-07 International Business Machines Corporation Apparatus for compression coding using cross-array correlation between two-dimensional matrices derived from two-valued digital images

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EXBK/69 *
NV1298/62 *
NV688/75 *

Also Published As

Publication number Publication date
GB1594521A (en) 1981-07-30
US4191974A (en) 1980-03-04
DE2805294A1 (de) 1978-08-17
DE2805294C2 (de) 1982-12-16
FR2379956B1 (fr) 1982-05-07

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