FR2357126A1 - Procede et dispositif de transmission de fac-simile - Google Patents
Procede et dispositif de transmission de fac-simileInfo
- Publication number
- FR2357126A1 FR2357126A1 FR7719765A FR7719765A FR2357126A1 FR 2357126 A1 FR2357126 A1 FR 2357126A1 FR 7719765 A FR7719765 A FR 7719765A FR 7719765 A FR7719765 A FR 7719765A FR 2357126 A1 FR2357126 A1 FR 2357126A1
- Authority
- FR
- France
- Prior art keywords
- facsimile
- fac
- transmission method
- transmitted
- 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
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
- H04N1/4175—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding involving the encoding of tone transitions with respect to tone transitions in a reference line
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
- G06T9/005—Statistical coding, e.g. Huffman, run length coding
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Compression Of Band Width Or Redundancy In Fax (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Image Processing (AREA)
- Facsimiles In General (AREA)
Abstract
L'invention concerne la compression des signaux de fac-similé par élimination de la redondance. La section de codage 120 de la station émettrice du dispositif de transmission de fac-similé de l'invention comporte, entre autres, des mémoires de ligne 180 qui enregistrent deux lignes d'analyse adjacentes de l'image à transmettre. Un codeur 190 compare le contenu de ces memoires pour réduire au minimum la redondance du signal de fac-similé d'origine, afin de réduire la quantité d'information à transmettre, et le temps de transmission. Application à la transmission de documents par fac-similé.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51076917A JPS5826713B2 (ja) | 1976-06-28 | 1976-06-28 | 2値信号の逐次境界差分符号化伝送方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2357126A1 true FR2357126A1 (fr) | 1978-01-27 |
FR2357126B1 FR2357126B1 (fr) | 1983-03-11 |
Family
ID=13619032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7719765A Granted FR2357126A1 (fr) | 1976-06-28 | 1977-06-28 | Procede et dispositif de transmission de fac-simile |
Country Status (7)
Country | Link |
---|---|
US (1) | US4156880A (fr) |
JP (1) | JPS5826713B2 (fr) |
CA (1) | CA1106055A (fr) |
DE (1) | DE2728889C3 (fr) |
FR (1) | FR2357126A1 (fr) |
GB (1) | GB1532346A (fr) |
NL (1) | NL7707063A (fr) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925422B2 (ja) * | 1978-08-29 | 1984-06-18 | 株式会社リコー | フアクシミリ送信機 |
DE3016738C2 (de) * | 1980-04-30 | 1988-06-16 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur Übertragung eines Bitmusterfeldes in einen Speicher und Schaltungsanordnung zur Ausübung des Verfahrens |
US4360840A (en) * | 1980-05-13 | 1982-11-23 | Am International, Inc. | Real time data compression/decompression scheme for facsimile transmission system |
IT1155650B (it) * | 1982-03-19 | 1987-01-28 | Olivetti & Co Spa | Metodo ed apparecchiatura di compressione e decompressione di informazioni digitali di immagini |
JPS5927677A (ja) * | 1982-08-04 | 1984-02-14 | Kokusai Denshin Denwa Co Ltd <Kdd> | フアクシミリ信号の符号化方式 |
JPS59126368A (ja) * | 1983-01-10 | 1984-07-20 | Hitachi Ltd | 符号化復号化装置 |
US4558371A (en) * | 1983-08-19 | 1985-12-10 | Advanced Micro Devices, Inc. | Method and device for two-dimensional facsimile coding |
US4562484A (en) * | 1983-08-19 | 1985-12-31 | Advanced Micro Devices, Inc. | Method and device for decoding two-dimensional facsimile signals |
DE3483521D1 (de) * | 1984-01-16 | 1990-12-06 | Ibm | Verfahren zum kodieren und dekodieren eines digitalen bildes. |
US4725815A (en) * | 1984-01-16 | 1988-02-16 | International Business Machines Corporation | Method for encoding and decoding a digital image |
CA1296798C (fr) * | 1985-08-02 | 1992-03-03 | Katsutoshi Hisada | Appareil de codage de signaux d'imagerie |
US4750043A (en) | 1985-08-08 | 1988-06-07 | Canon Kabushiki Kaisha | Decoding apparatus for image code |
US5185820A (en) * | 1990-10-10 | 1993-02-09 | Fuji Xerox Co., Ltd. | System for compressing image data having blank lines |
JP3356442B2 (ja) * | 1991-06-04 | 2002-12-16 | 株式会社東芝 | データ記録再生装置 |
JP2945324B2 (ja) * | 1995-07-11 | 1999-09-06 | ゼロックス コーポレイション | 圧縮解除装置及びその方法 |
US5995671A (en) * | 1996-11-08 | 1999-11-30 | Hughes Electronics Corporation | Efficient representation of texture for gray scale alpha maps |
DE19817007C2 (de) * | 1998-04-17 | 2001-08-09 | Deutsche Telekom Ag | Verfahren zur Nutzung digitaler Datennetze zum Zwecke der Bandbreitenreduktion bei der Übertragung von Daten über Sprachverbindungswege |
US6728412B1 (en) * | 1999-10-29 | 2004-04-27 | S.V.V. Technology Innovations, Inc. | Method and apparatus for on-the-fly image coding |
JP5347786B2 (ja) * | 2008-11-18 | 2013-11-20 | セイコーエプソン株式会社 | 画像処理コントローラー、及び、印刷装置 |
JP7406884B2 (ja) * | 2019-06-27 | 2023-12-28 | キヤノン株式会社 | 情報処理装置、プログラム及び制御方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3991267A (en) * | 1970-01-26 | 1976-11-09 | Eg & G, Inc. | Method for producing a compressed digital representation of a visible image |
GB1409364A (en) * | 1972-02-17 | 1975-10-08 | Dacom Inc | Dual-line data compression method and system for compressing transmitting and reproducing facsimile data |
DE2233796C3 (de) * | 1972-07-10 | 1975-03-20 | K.K. Ricoh, Tokio | Verfahren zur Video-Signal-Kompression und Expansion und Vorrichtungen zur Durchführung des Verfahrens |
DE2253378C3 (de) * | 1972-10-31 | 1981-02-19 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren und Anordnung zur Codierung von Faksimilesignalen |
US3927251A (en) * | 1973-05-18 | 1975-12-16 | Rca Corp | Method and apparatus for the detection and control of errors in two-dimensionally compressed image data |
DE2364629C2 (de) * | 1973-12-24 | 1982-08-12 | Robert Bosch Gmbh, 7000 Stuttgart | System zur Codierung von Video-Signalen nach dem sogenannten Differenzsignalverfahren |
JPS5096116A (fr) * | 1973-12-24 | 1975-07-31 | ||
JPS5157113A (ja) * | 1974-11-13 | 1976-05-19 | Matsushita Electric Ind Co Ltd | Taiikiatsushukuhoshiki |
-
1976
- 1976-06-28 JP JP51076917A patent/JPS5826713B2/ja not_active Expired
-
1977
- 1977-06-24 NL NL7707063A patent/NL7707063A/xx not_active Application Discontinuation
- 1977-06-27 CA CA281,440A patent/CA1106055A/fr not_active Expired
- 1977-06-27 DE DE2728889A patent/DE2728889C3/de not_active Expired
- 1977-06-28 FR FR7719765A patent/FR2357126A1/fr active Granted
- 1977-06-28 GB GB27083/77A patent/GB1532346A/en not_active Expired
- 1977-06-28 US US05/810,746 patent/US4156880A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS5826713B2 (ja) | 1983-06-04 |
NL7707063A (nl) | 1977-12-30 |
US4156880A (en) | 1979-05-29 |
FR2357126B1 (fr) | 1983-03-11 |
GB1532346A (en) | 1978-11-15 |
DE2728889C3 (de) | 1982-01-28 |
DE2728889A1 (de) | 1977-12-29 |
JPS532026A (en) | 1978-01-10 |
CA1106055A (fr) | 1981-07-28 |
DE2728889B2 (de) | 1981-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |