CA1002175A - Dual-line data compression method and system for compressing, transmitting and reproducing facsimile data - Google Patents

Dual-line data compression method and system for compressing, transmitting and reproducing facsimile data

Info

Publication number
CA1002175A
CA1002175A CA163,902A CA163902A CA1002175A CA 1002175 A CA1002175 A CA 1002175A CA 163902 A CA163902 A CA 163902A CA 1002175 A CA1002175 A CA 1002175A
Authority
CA
Canada
Prior art keywords
compressing
dual
transmitting
compression method
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
CA163,902A
Other versions
CA163902S (en
Inventor
Donald R. Weber
Edgar A. Poe (Iii)
Joseph Lou
Ralph W. Austad
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.)
DACOM
Original Assignee
DACOM
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 DACOM filed Critical DACOM
Priority to CA217,679A priority Critical patent/CA1002176A/en
Priority to CA217,680A priority patent/CA1002177A/en
Application granted granted Critical
Publication of CA1002175A publication Critical patent/CA1002175A/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 Of Band Width Or Redundancy In Fax (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
CA163,902A 1972-02-17 1973-02-16 Dual-line data compression method and system for compressing, transmitting and reproducing facsimile data Expired CA1002175A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA217,679A CA1002176A (en) 1972-02-17 1975-01-10 Dual-line data compression method and system for compressing, transmitting and reproducing facsimile data
CA217,680A CA1002177A (en) 1972-02-17 1975-01-10 Dual-line data compression method and system for compressing, transmitting and reproducing fascimile data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22714972A 1972-02-17 1972-02-17

Publications (1)

Publication Number Publication Date
CA1002175A true CA1002175A (en) 1976-12-21

Family

ID=22851959

Family Applications (1)

Application Number Title Priority Date Filing Date
CA163,902A Expired CA1002175A (en) 1972-02-17 1973-02-16 Dual-line data compression method and system for compressing, transmitting and reproducing facsimile data

Country Status (6)

Country Link
JP (1) JPS5424604B2 (en)
CA (1) CA1002175A (en)
DE (1) DE2307511C2 (en)
FR (1) FR2172400B1 (en)
GB (2) GB1409364A (en)
IT (1) IT979204B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2257183B1 (en) * 1974-01-04 1976-11-26 Cit Alcatel FACSIMILE IMAGE TRANSMISSION SYSTEM
JPS51132015A (en) * 1974-12-23 1976-11-16 Fujitsu Ltd Picture signal encoding transmission system
JPS5290216A (en) * 1976-01-24 1977-07-29 Mita Industrial Co Ltd Picture signal band compressing method
JPS5295113A (en) * 1976-02-05 1977-08-10 Fujitsu Ltd Band compression transmission system
JPS5826713B2 (en) * 1976-06-28 1983-06-04 日本電信電話株式会社 Sequential boundary differential coding transmission method for binary signals
JPS5666971A (en) * 1979-11-05 1981-06-05 Dainippon Screen Mfg Co Ltd Picture data compressing method
DE3326224C2 (en) * 1983-07-21 1987-04-16 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for controlling a display device
JPS60251775A (en) * 1984-05-28 1985-12-12 Ricoh Co Ltd Data transfer system
JPH0671312B2 (en) * 1989-05-29 1994-09-07 キヤノン株式会社 Fax machine
DE4028927A1 (en) * 1990-08-07 1992-02-13 Dirr Josef Coding and transmission of originals and images - combines code elements of several lines or channels into code word

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3502806A (en) * 1966-08-01 1970-03-24 Xerox Corp Modified run length data reduction system
FR1546604A (en) * 1966-08-15 1968-11-22 Xeros Corp Phototelegraph communication installation
US4135214A (en) * 1969-07-02 1979-01-16 Dacom, Inc. Method and apparatus for compressing facsimile transmission data
JPS5123408B1 (en) * 1971-07-10 1976-07-16

Also Published As

Publication number Publication date
DE2307511A1 (en) 1973-09-06
JPS5424604B2 (en) 1979-08-22
AU5227973A (en) 1974-08-22
FR2172400A1 (en) 1973-09-28
IT979204B (en) 1974-09-30
JPS4985913A (en) 1974-08-17
DE2307511C2 (en) 1983-05-11
FR2172400B1 (en) 1978-06-23
GB1409365A (en) 1975-10-08
GB1409364A (en) 1975-10-08

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