GB1409365A - 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
GB1409365A
GB1409365A GB5349874A GB5349874A GB1409365A GB 1409365 A GB1409365 A GB 1409365A GB 5349874 A GB5349874 A GB 5349874A GB 5349874 A GB5349874 A GB 5349874A GB 1409365 A GB1409365 A GB 1409365A
Authority
GB
United Kingdom
Prior art keywords
dual
compression method
data compression
line data
reproducing
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
GB5349874A
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 Inc
Original Assignee
Dacom Inc
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 Inc filed Critical Dacom Inc
Publication of GB1409365A publication Critical patent/GB1409365A/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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

1409365 Facsimile DACOM Inc 7 Feb 1973 [17 Feb 1972] 53498/74 Divided out of 1409364 Heading H4F The disclosure is identical to that in Specification 1,409,364, the claims however relate to the receiver-reconstruction-decoder of the facsimile system. Reference has been directed by the Comptroller to Specification 1,318,114.
GB5349874A 1972-02-17 1973-02-07 Dual-line data compression method and system for compressing transmitting and reproducing facsimile data Expired GB1409365A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1409365A true GB1409365A (en) 1975-10-08

Family

ID=22851959

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5349874A Expired GB1409365A (en) 1972-02-17 1973-02-07 Dual-line data compression method and system for compressing transmitting and reproducing facsimile data
GB601473A Expired GB1409364A (en) 1972-02-17 1973-02-07 Dual-line data compression method and system for compressing transmitting and reproducing facsimile data

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB601473A Expired GB1409364A (en) 1972-02-17 1973-02-07 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) GB1409365A (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
DE3326224A1 (en) * 1983-07-21 1985-02-07 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for driving 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
CA1002175A (en) 1976-12-21
JPS5424604B2 (en) 1979-08-22
JPS4985913A (en) 1974-08-17
DE2307511C2 (en) 1983-05-11
IT979204B (en) 1974-09-30
FR2172400B1 (en) 1978-06-23
GB1409364A (en) 1975-10-08
FR2172400A1 (en) 1973-09-28
DE2307511A1 (en) 1973-09-06
AU5227973A (en) 1974-08-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee