FR2256592B1 - - Google Patents

Info

Publication number
FR2256592B1
FR2256592B1 FR7441620*A FR7441620A FR2256592B1 FR 2256592 B1 FR2256592 B1 FR 2256592B1 FR 7441620 A FR7441620 A FR 7441620A FR 2256592 B1 FR2256592 B1 FR 2256592B1
Authority
FR
France
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
Application number
FR7441620*A
Other versions
FR2256592A1 (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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2256592A1 publication Critical patent/FR2256592A1/fr
Application granted granted Critical
Publication of FR2256592B1 publication Critical patent/FR2256592B1/fr
Expired legal-status Critical Current

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
    • 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
    • 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
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory
    • 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
    • H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
    • 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)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Communication Control (AREA)
  • Digital Computer Display Output (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Image Processing (AREA)
FR7441620*A 1973-12-26 1974-10-30 Expired FR2256592B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US428500A US3925780A (en) 1973-12-26 1973-12-26 Apparatus for data compression encoding and decoding

Publications (2)

Publication Number Publication Date
FR2256592A1 FR2256592A1 (fr) 1975-07-25
FR2256592B1 true FR2256592B1 (fr) 1976-10-22

Family

ID=23699149

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7441620*A Expired FR2256592B1 (fr) 1973-12-26 1974-10-30

Country Status (9)

Country Link
US (1) US3925780A (fr)
JP (1) JPS5098720A (fr)
CA (1) CA1038499A (fr)
CH (1) CH575689A5 (fr)
DE (1) DE2457732C2 (fr)
FR (1) FR2256592B1 (fr)
GB (1) GB1468461A (fr)
IT (1) IT1027851B (fr)
NL (1) NL7416629A (fr)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087811A (en) * 1976-02-25 1978-05-02 International Business Machines Corporation Threshold decoder
US4152697A (en) * 1976-08-11 1979-05-01 Xerox Corporation Parallel run-length decoder
US4149670A (en) * 1976-10-14 1979-04-17 Securities Industry Automation Corp. Mark-sense card
JPS5376704A (en) * 1976-12-19 1978-07-07 Ricoh Co Ltd Facsimile equipment
JPS5816660B2 (ja) * 1976-12-19 1983-04-01 株式会社リコー フアクシミリ装置
JPS5376703A (en) * 1976-12-19 1978-07-07 Ricoh Co Ltd Facsimile equipment
US4136363A (en) * 1976-12-29 1979-01-23 Xerox Corporation Truncated run length encoding
US4177456A (en) * 1977-02-10 1979-12-04 Hitachi, Ltd. Decoder for variable-length codes
JPS53134340A (en) * 1977-04-28 1978-11-22 Ricoh Co Ltd Run length coding system
US4193097A (en) * 1977-04-30 1980-03-11 Canon Kabushiki Kaisha Facsimile apparatus
US4161757A (en) * 1977-06-01 1979-07-17 Litton Systems, Inc. Facsimile system
JPS581240A (ja) * 1981-06-26 1983-01-06 Fujitsu Ltd コ−ド変換方式
US4475174A (en) * 1981-09-08 1984-10-02 Nippon Telegraph & Telephone Public Corporation Decoding apparatus for codes represented by code tree
US4499596A (en) * 1982-06-28 1985-02-12 International Business Machines Corporation Adaptive facsimile compression using a dynamic extendable decision network
JPS5937773A (ja) * 1982-08-26 1984-03-01 Canon Inc ランレングス符号復号装置
EP0170087B1 (fr) * 1984-07-04 1992-09-23 Kabushiki Kaisha Toshiba Procédé et dispositif d'analyse et de synthèse de la parole humaine
US4682150A (en) * 1985-12-09 1987-07-21 Ncr Corporation Data compression method and apparatus
FR2608806B1 (fr) * 1986-12-23 1989-03-17 Valero Robert Procede et appareil programmable pour le transcodage de chaines de caracteres
JP2603205B2 (ja) * 1987-03-16 1997-04-23 シーメンス、アクチエンゲゼルシヤフト 多段集積デコーダ装置
US5023610A (en) * 1990-06-13 1991-06-11 Cordell Manufacturing, Inc. Data compression method using textual substitution
US5173695A (en) * 1990-06-29 1992-12-22 Bell Communications Research, Inc. High-speed flexible variable-length-code decoder
US5099237A (en) * 1990-07-10 1992-03-24 Research Corporation Technologies, Inc. Method and apparatus for providing maximum rate modulation or compression encoding and decoding
US5367674A (en) * 1991-12-13 1994-11-22 International Business Machines Corporation Data stream optimizer utilizing difference coding between a current state buffer and a next state buffer
US5982437A (en) * 1992-10-26 1999-11-09 Sony Corporation Coding method and system, and decoding method and system
JP2836467B2 (ja) * 1993-12-16 1998-12-14 日本電気株式会社 ２値シンボルの符号化・復号化回路
US5635932A (en) * 1994-10-17 1997-06-03 Fujitsu Limited Lempel-ziv compression with expulsion of dictionary buffer matches
US6728413B2 (en) * 1998-01-19 2004-04-27 Canon Kabushiki Kaisha Lattice vector quantization in image compression and decompression
US6535150B1 (en) 1999-09-03 2003-03-18 Whamtech, Inc. Method and apparatus for implementing run-length compression
TW452708B (en) * 1999-11-24 2001-09-01 Winbond Electronics Corp Architecture for fast compression of 2-dimensional image data
US6400293B1 (en) * 1999-12-20 2002-06-04 Ric B. Richardson Data compression system and method
WO2008087750A1 (fr) * 2007-01-19 2008-07-24 Mitsubishi Electric Corporation Dispositif de table, dispositifs de codage et de décodage à longueur variable et dispositif de codage-décodage à longueur variable
US8234524B1 (en) * 2009-09-28 2012-07-31 Dale Trenton Smith Protocol analysis with event present flags
US10083754B1 (en) * 2017-06-05 2018-09-25 Western Digital Technologies, Inc. Dynamic selection of soft decoding information

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3471639A (en) * 1966-10-03 1969-10-07 Xerox Corp Shift/count control circuit
US3813485A (en) * 1972-01-05 1974-05-28 Ibm System for compression of digital data
JPS5135329B2 (fr) * 1972-02-18 1976-10-01

Also Published As

Publication number Publication date
GB1468461A (en) 1977-03-30
CA1038499A (fr) 1978-09-12
DE2457732C2 (de) 1985-03-14
IT1027851B (it) 1978-12-20
DE2457732A1 (de) 1975-07-03
FR2256592A1 (fr) 1975-07-25
JPS5098720A (fr) 1975-08-06
CH575689A5 (fr) 1976-05-14
US3925780A (en) 1975-12-09
NL7416629A (nl) 1975-06-30

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Legal Events

Date Code Title Description
ST Notification of lapse