CA962761A - Data compression methods and apparatus - Google Patents

Data compression methods and apparatus

Info

Publication number
CA962761A
CA962761A CA147,830A CA147830A CA962761A CA 962761 A CA962761 A CA 962761A CA 147830 A CA147830 A CA 147830A CA 962761 A CA962761 A CA 962761A
Authority
CA
Canada
Prior art keywords
data compression
compression methods
methods
data
compression
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
Application number
CA147,830A
Other languages
English (en)
Other versions
CA147830S (en
Inventor
Pierre A. Lavallee
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of CA962761A publication Critical patent/CA962761A/en
Expired 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
    • H04N1/415—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which the picture-elements are subdivided or grouped into fixed one-dimensional or two-dimensional blocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Facsimiles In General (AREA)
CA147,830A 1971-12-10 1972-07-25 Data compression methods and apparatus Expired CA962761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20679571A 1971-12-10 1971-12-10

Publications (1)

Publication Number Publication Date
CA962761A true CA962761A (en) 1975-02-11

Family

ID=22768001

Family Applications (1)

Application Number Title Priority Date Filing Date
CA147,830A Expired CA962761A (en) 1971-12-10 1972-07-25 Data compression methods and apparatus

Country Status (9)

Country Link
US (1) US3726993A (fr)
JP (1) JPS5242487B2 (fr)
BE (1) BE792491A (fr)
CA (1) CA962761A (fr)
DE (1) DE2241054A1 (fr)
FR (1) FR2162677A1 (fr)
GB (1) GB1413340A (fr)
IT (1) IT984615B (fr)
NL (1) NL7216564A (fr)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076652A (en) 1971-04-16 2000-06-20 Texas Instruments Incorporated Assembly line system and apparatus controlling transfer of a workpiece
US3835467A (en) * 1972-11-10 1974-09-10 Ibm Minimal redundancy decoding method and means
FR2231972B1 (fr) * 1973-05-29 1977-04-29 Electricite De France
US4100580A (en) * 1973-06-01 1978-07-11 U.S. Philips Corporation Facsimile system
US4185190A (en) * 1974-10-28 1980-01-22 Compagnie Internationale pour L'Informatique, CII-Honeywell Bull (Societe Anonyme) Data accumulation and compression apparatus
US4077034A (en) * 1974-11-04 1978-02-28 Dell Harold R Data compression
US4183065A (en) * 1976-03-24 1980-01-08 Eastman Kodak Company Video recording apparatus which samples and quantizes low frequencies and then groups and records an analog representation thereof
JPS5484877U (fr) * 1977-11-28 1979-06-15
US4536801A (en) * 1981-10-01 1985-08-20 Banctec, Inc. Video data compression system and method
US4545032A (en) * 1982-03-08 1985-10-01 Iodata, Inc. Method and apparatus for character code compression and expansion
US4494150A (en) * 1982-07-13 1985-01-15 International Business Machines Corporation Word autocorrelation redundancy match facsimile compression for text processing systems
US4499499A (en) * 1982-12-29 1985-02-12 International Business Machines Corporation Method for identification and compression of facsimile symbols in text processing systems
JPS60261252A (ja) * 1984-06-08 1985-12-24 Dainippon Screen Mfg Co Ltd 画像信号の密度変換方法
NL8700182A (nl) * 1987-01-27 1988-08-16 Oce Nederland Bv Werkwijze voor het coderen van beeldinformatie.
JPS63236472A (ja) * 1987-03-25 1988-10-03 Fujitsu Ltd 画像情報符号化処理装置
US5282256A (en) * 1988-05-13 1994-01-25 Canon Kabushiki Kaisha Binary image data coding method having the function of correcting errors derived from coding
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
CZ286929B6 (en) * 1993-08-05 2000-08-16 Motorola Inc Telefax communication process within a communication system with selective calling and communication system for making the same
JP3111763B2 (ja) * 1993-08-05 2000-11-27 松下電器産業株式会社 高能率伝送方法
DE69432114T2 (de) * 1993-11-24 2003-10-30 Canon K.K., Tokio/Tokyo System zum Identifizieren und Verarbeiten von Formularen
US5689255A (en) * 1995-08-22 1997-11-18 Hewlett-Packard Company Method and apparatus for compressing and decompressing image data
US6055441A (en) * 1996-04-30 2000-04-25 International Business Machines Corporation Systems and methods for facsimile communication over a cellular radiotelephone communications link
US8341585B2 (en) * 2011-02-08 2012-12-25 Oracle International Corporation Skewed placement grid for very large scale integrated circuits
US11366735B2 (en) 2020-08-20 2022-06-21 Bank Of America Corporation Dynamic data storage management

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922840A (en) * 1958-10-24 1960-01-26 Tele Dynamics Inc Weather chart facsimile system
US2978535A (en) * 1960-01-28 1961-04-04 Bell Telephone Labor Inc Optimal run length coding of image signals
GB1188126A (en) * 1966-06-15 1970-04-15 Xerox Corp Selective Binary Encoding

Also Published As

Publication number Publication date
IT984615B (it) 1974-11-20
GB1413340A (en) 1975-11-12
JPS5242487B2 (fr) 1977-10-25
JPS4866715A (fr) 1973-09-12
US3726993A (en) 1973-04-10
DE2241054A1 (de) 1973-06-20
FR2162677A1 (fr) 1973-07-20
BE792491A (fr) 1973-06-08
NL7216564A (fr) 1973-06-13

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