ES8406019A1 - Una disposicion de conversion de datos para usarse en un sistema de facsimil. - Google Patents
Una disposicion de conversion de datos para usarse en un sistema de facsimil.Info
- Publication number
- ES8406019A1 ES8406019A1 ES518614A ES518614A ES8406019A1 ES 8406019 A1 ES8406019 A1 ES 8406019A1 ES 518614 A ES518614 A ES 518614A ES 518614 A ES518614 A ES 518614A ES 8406019 A1 ES8406019 A1 ES 8406019A1
- Authority
- ES
- Spain
- Prior art keywords
- data
- facsimile data
- compression circuit
- data converting
- converting system
- 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
Links
Classifications
-
- 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
-
- 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
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)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
SISTEMA DE CONVERSION DE DATOS PARA SU UTILIZACION EN UN SISTEMA DE FACSIMIL, EN PARTICULAR, SISTEMA PARA CODIFICAR ELEMENTOS DE IMAGEN Y DESCODIFICAR DATOS COMPRIMIDOS EN EL SISTEMA DE FACSIMIL.CONSTA DE UN CIRCUITO (50) DE COMPRESION DE DATOS QUE GENERA UN BLOQUE DE LONGITUD DIFERENCIAL; DE UNA TABLA (21) DE MEMORIA ROM PARA CODIFICAR UN BLOQUE DIFERENCIAL EN DATOS COMPRIMIDOS; Y DE UN COMPARADOR (51) QUE COMPARA LOS DATOS COMPRIMIDOS DADOS CON UNA SECUENCIA DE DATOS DESDE EL CIRCUITO DE COMPRESION DE DATOS. CUANDO SE PRODUCE CONCORDANCIA ENTRE LOS DATOSCOMPRIMIDOS DADOS, SE OBTIENEN EN EL CIRCUITO DE COMPRESION DE DATOS, DATOS REPRODUCIDOS O DATOS DE LONGITUD DIFERENCIAL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56213573A JPS58129876A (ja) | 1981-12-29 | 1981-12-29 | フアクシミリ装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8406019A1 true ES8406019A1 (es) | 1984-06-16 |
ES518614A0 ES518614A0 (es) | 1984-06-16 |
Family
ID=16641433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES518614A Granted ES518614A0 (es) | 1981-12-29 | 1982-12-28 | Una disposicion de conversion de datos para usarse en un sistema de facsimil. |
Country Status (7)
Country | Link |
---|---|
US (1) | US4543612A (es) |
EP (1) | EP0083247B1 (es) |
JP (1) | JPS58129876A (es) |
AU (1) | AU536110B2 (es) |
CA (1) | CA1203887A (es) |
DE (1) | DE3267850D1 (es) |
ES (1) | ES518614A0 (es) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5987569A (ja) * | 1982-11-11 | 1984-05-21 | Toshiba Corp | デ−タ自動連続処理回路 |
JPS59161974A (ja) * | 1983-03-07 | 1984-09-12 | Nec Corp | フアクシミリ装置 |
US4682215A (en) * | 1984-05-28 | 1987-07-21 | Ricoh Company, Ltd. | Coding system for image processing apparatus |
WO1986003037A1 (en) * | 1984-11-16 | 1986-05-22 | Konstantine Beridze | Data compressing computer system and process thereto |
US4631521A (en) * | 1984-12-31 | 1986-12-23 | Wang Laboratories, Inc. | Method and apparatus for differential run-length coding |
CA1296798C (en) * | 1985-08-02 | 1992-03-03 | Katsutoshi Hisada | Image signal coding apparatus |
JPH0799856B2 (ja) * | 1985-12-23 | 1995-10-25 | キヤノン株式会社 | 画像信号の復号化装置 |
JPH0799857B2 (ja) * | 1985-12-23 | 1995-10-25 | キヤノン株式会社 | 画像信号の復号化装置 |
JP2645379B2 (ja) * | 1987-03-17 | 1997-08-25 | ディジタル イクイプメント コーポレーション | 連続トーン・イメージ・データからディザード・イメージを作成するシステム |
AU605298B2 (en) * | 1987-05-29 | 1991-01-10 | Digital Equipment Corporation | System for producing dithered images on asymmetric grids |
US5146221A (en) * | 1989-01-13 | 1992-09-08 | Stac, Inc. | Data compression apparatus and method |
US5532694A (en) * | 1989-01-13 | 1996-07-02 | Stac Electronics, Inc. | Data compression apparatus and method using matching string searching and Huffman encoding |
US6215560B1 (en) | 1990-07-13 | 2001-04-10 | Canon Kabushiki Kaisha | Image processing apparatus for producing high resolution image data based on a memory area capacity |
US5689255A (en) * | 1995-08-22 | 1997-11-18 | Hewlett-Packard Company | Method and apparatus for compressing and decompressing image data |
JPH11284844A (ja) * | 1998-03-27 | 1999-10-15 | Oki Data Corp | 2値画像データの解析及び変換処理方法 |
JP2002036636A (ja) * | 2000-07-19 | 2002-02-06 | Mitsubishi Electric Corp | 画像データ変換装置および画像データ変換方法 |
US6895119B2 (en) * | 2002-03-14 | 2005-05-17 | Winbond Electronics Corp. | Method and apparatus for decoding compressed image data and capable of preventing error propagation |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3510576A (en) * | 1966-10-03 | 1970-05-05 | Xerox Corp | Data sampler circuit for determining information run lengths |
AU503988B2 (en) * | 1975-11-25 | 1979-09-27 | Rudolf Hell Gmbh | Digital programme length coding with redundancy reduction forthe transmission of binary coded image information |
FR2441297A1 (fr) * | 1978-11-09 | 1980-06-06 | Cit Alcatel | Dispositif de conversion binaire et applications aux emetteurs et recepteurs d'informations d'image a reduction de redondance |
JPS55102968A (en) * | 1979-01-31 | 1980-08-06 | Sharp Corp | Run-length decoding system for mh code |
US4334246A (en) * | 1980-05-16 | 1982-06-08 | Xerox Corporation | Data decompressor circuit |
US4386373A (en) * | 1980-07-18 | 1983-05-31 | Ricoh Company, Ltd. | Facsimile apparatus |
-
1981
- 1981-12-29 JP JP56213573A patent/JPS58129876A/ja active Granted
-
1982
- 1982-12-22 AU AU91798/82A patent/AU536110B2/en not_active Ceased
- 1982-12-27 US US06/453,100 patent/US4543612A/en not_active Expired - Fee Related
- 1982-12-28 ES ES518614A patent/ES518614A0/es active Granted
- 1982-12-29 CA CA000418663A patent/CA1203887A/en not_active Expired
- 1982-12-30 DE DE8282306995T patent/DE3267850D1/de not_active Expired
- 1982-12-30 EP EP82306995A patent/EP0083247B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0083247A2 (en) | 1983-07-06 |
EP0083247B1 (en) | 1985-12-04 |
JPS6338913B2 (es) | 1988-08-02 |
US4543612A (en) | 1985-09-24 |
AU536110B2 (en) | 1984-04-19 |
EP0083247A3 (en) | 1983-10-05 |
JPS58129876A (ja) | 1983-08-03 |
AU9179882A (en) | 1983-08-18 |
ES518614A0 (es) | 1984-06-16 |
DE3267850D1 (en) | 1986-01-16 |
CA1203887A (en) | 1986-04-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19990201 |