GB1537464A - Facsimile data compression method - Google Patents

Facsimile data compression method

Info

Publication number
GB1537464A
GB1537464A GB51548/75A GB5154875A GB1537464A GB 1537464 A GB1537464 A GB 1537464A GB 51548/75 A GB51548/75 A GB 51548/75A GB 5154875 A GB5154875 A GB 5154875A GB 1537464 A GB1537464 A GB 1537464A
Authority
GB
United Kingdom
Prior art keywords
signals
group
converted
scan
encoded
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
GB51548/75A
Other languages
English (en)
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of GB1537464A publication Critical patent/GB1537464A/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, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Of Band Width Or Redundancy In Fax (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Facsimiles In General (AREA)
GB51548/75A 1974-12-23 1975-12-17 Facsimile data compression method Expired GB1537464A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50002642A JPS51132015A (en) 1974-12-23 1974-12-23 Picture signal encoding transmission system

Publications (1)

Publication Number Publication Date
GB1537464A true GB1537464A (en) 1978-12-29

Family

ID=11535012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51548/75A Expired GB1537464A (en) 1974-12-23 1975-12-17 Facsimile data compression method

Country Status (8)

Country Link
US (1) US4048656A (enExample)
JP (1) JPS51132015A (enExample)
AU (1) AU500084B2 (enExample)
CA (1) CA1065049A (enExample)
DE (1) DE2557922C3 (enExample)
ES (1) ES443813A1 (enExample)
FR (1) FR2296321A1 (enExample)
GB (1) GB1537464A (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1128645A (en) * 1978-07-31 1982-07-27 Yasuhiro Yamazaki Transmission method and system for facsimile signal
CA1128646A (en) * 1978-11-22 1982-07-27 Yasuhiro Yamazaki Coding method for facsimile signal
CA1197927A (en) * 1981-10-01 1985-12-10 Richard G. Van Tyne Document processing system and equipment
JPS59126368A (ja) * 1983-01-10 1984-07-20 Hitachi Ltd 符号化復号化装置
JPS59178077A (ja) * 1983-03-28 1984-10-09 Dainippon Screen Mfg Co Ltd ２値画像のデ−タ圧縮方法
US4562484A (en) * 1983-08-19 1985-12-31 Advanced Micro Devices, Inc. Method and device for decoding two-dimensional facsimile signals
US4558371A (en) * 1983-08-19 1985-12-10 Advanced Micro Devices, Inc. Method and device for two-dimensional facsimile coding
US4568983A (en) * 1983-12-07 1986-02-04 The Mead Corporation Image data compression/decompression
US4982293A (en) * 1988-06-02 1991-01-01 Ricoh Company, Ltd. Method of compressing halftone image data
DE4028927A1 (de) * 1990-08-07 1992-02-13 Dirr Josef Verfahren fuer die codierung und uebertragung von information, insbesondere von vorlagen und bildern und fuer das fernsehen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1409365A (en) * 1972-02-17 1975-10-08 Dacom Inc Dual-line data compression method and system for compressing transmitting and reproducing facsimile data
JPS5148924B2 (enExample) * 1972-09-29 1976-12-23

Also Published As

Publication number Publication date
CA1065049A (en) 1979-10-23
FR2296321B1 (enExample) 1982-03-05
US4048656A (en) 1977-09-13
ES443813A1 (es) 1977-04-16
AU500084B2 (en) 1979-05-10
DE2557922C3 (de) 1981-11-12
JPS5329561B2 (enExample) 1978-08-22
JPS51132015A (en) 1976-11-16
DE2557922A1 (de) 1976-07-01
AU8772175A (en) 1977-06-23
FR2296321A1 (fr) 1976-07-23
DE2557922B2 (de) 1981-02-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19951216