CA1114493A - Method and device for transmitting facsimile picture signals - Google Patents

Method and device for transmitting facsimile picture signals

Info

Publication number
CA1114493A
CA1114493A CA274,945A CA274945A CA1114493A CA 1114493 A CA1114493 A CA 1114493A CA 274945 A CA274945 A CA 274945A CA 1114493 A CA1114493 A CA 1114493A
Authority
CA
Canada
Prior art keywords
run
length
storage element
value
shift register
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
CA274,945A
Other languages
English (en)
French (fr)
Inventor
Ulf Rothgordt
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1114493A publication Critical patent/CA1114493A/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
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
CA274,945A 1976-04-09 1977-03-28 Method and device for transmitting facsimile picture signals Expired CA1114493A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP.2615486.9 1976-04-09
DE19762615486 DE2615486C2 (de) 1976-04-09 1976-04-09 Verfahren und Anordnung zur Übertragung von Faksimile-Bildsignalen

Publications (1)

Publication Number Publication Date
CA1114493A true CA1114493A (en) 1981-12-15

Family

ID=5974924

Family Applications (1)

Application Number Title Priority Date Filing Date
CA274,945A Expired CA1114493A (en) 1976-04-09 1977-03-28 Method and device for transmitting facsimile picture signals

Country Status (7)

Country Link
JP (1) JPS52123819A (OSRAM)
AU (1) AU508389B2 (OSRAM)
CA (1) CA1114493A (OSRAM)
DE (1) DE2615486C2 (OSRAM)
FR (1) FR2347843A1 (OSRAM)
GB (1) GB1539858A (OSRAM)
NL (1) NL7703685A (OSRAM)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232370C2 (de) * 1982-08-31 1984-10-25 Siemens AG, 1000 Berlin und 8000 München Verfahren zum Betrieb eines Bildkopierers, sowie Bildkopierer zur Durchführung dieses Verfahrens
US5033105A (en) * 1987-08-11 1991-07-16 Apple Computer Video compression algorithm
GB2208059B (en) * 1987-08-11 1991-09-25 Apple Computer Video compression algorithm

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585504A (en) * 1968-10-07 1971-06-15 British Telecommunications Res Electrical signalling system
US3700797A (en) * 1969-12-31 1972-10-24 Electronic Image Systems Corp Facsimile noise deletion and coding system
JPS5242607B2 (OSRAM) * 1973-04-12 1977-10-25
DE2440768C3 (de) * 1974-08-26 1982-03-18 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und Vorrichtung zur Datenkompression für die Faksimile-Übertragung graphischer Information
DE2450073A1 (de) * 1974-10-22 1976-05-06 Licentia Gmbh Vorverzerrer zur aufbereitung von runs vor einer rl-codierung

Also Published As

Publication number Publication date
FR2347843A1 (fr) 1977-11-04
JPS52123819A (en) 1977-10-18
GB1539858A (en) 1979-02-07
AU508389B2 (en) 1980-03-20
DE2615486C2 (de) 1983-12-08
DE2615486A1 (de) 1977-10-20
NL7703685A (nl) 1977-10-11
AU2417377A (en) 1978-10-19
FR2347843B1 (OSRAM) 1982-06-18

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Legal Events

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