GB1604106A - Facsimile transmission of pictures - Google Patents

Facsimile transmission of pictures Download PDF

Info

Publication number
GB1604106A
GB1604106A GB18069/78A GB1806978A GB1604106A GB 1604106 A GB1604106 A GB 1604106A GB 18069/78 A GB18069/78 A GB 18069/78A GB 1806978 A GB1806978 A GB 1806978A GB 1604106 A GB1604106 A GB 1604106A
Authority
GB
United Kingdom
Prior art keywords
signal
pulses
picture signal
level
picture
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
GB18069/78A
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.)
Dr Ing Rudolf Hell GmbH
Original Assignee
Dr Ing Rudolf Hell GmbH
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 Dr Ing Rudolf Hell GmbH filed Critical Dr Ing Rudolf Hell GmbH
Publication of GB1604106A publication Critical patent/GB1604106A/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
    • H04N1/40—Picture signal circuits
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Solid State Image Pick-Up Elements (AREA)
  • Facsimile Scanning Arrangements (AREA)
GB18069/78A 1977-05-05 1978-05-05 Facsimile transmission of pictures Expired GB1604106A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2720079A DE2720079C3 (de) 1977-05-05 1977-05-05 Verfahren zur Verbesserung der Bildqualität bei der Faksimile-Übertragung

Publications (1)

Publication Number Publication Date
GB1604106A true GB1604106A (en) 1981-12-02

Family

ID=6008068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18069/78A Expired GB1604106A (en) 1977-05-05 1978-05-05 Facsimile transmission of pictures

Country Status (14)

Country Link
AT (1) AT372561B (sv)
AU (1) AU518941B2 (sv)
BE (1) BE866727A (sv)
CH (1) CH627317A5 (sv)
DE (1) DE2720079C3 (sv)
DK (1) DK191378A (sv)
FI (1) FI781369A (sv)
FR (1) FR2390056A1 (sv)
GB (1) GB1604106A (sv)
IT (1) IT1095722B (sv)
NL (1) NL7804772A (sv)
NO (1) NO781338L (sv)
SE (1) SE7804769L (sv)
YU (1) YU101778A (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826755A1 (de) * 1978-06-19 1979-12-20 Hell Rudolf Dr Ing Gmbh Abtasteinrichtung
US4589034A (en) * 1980-12-05 1986-05-13 Canon Kabushiki Kaisha Image processing apparatus
DE3441152A1 (de) * 1984-11-10 1986-05-28 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Verfahren zur magnetischen aufzeichnung und wiedergabe von telekommunikations-signalen, insbesondere von videotext- und/oder kabeltext-signalen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189685A (en) * 1961-04-21 1965-06-15 Philco Corp Two-level quantization system
DE1268657B (de) * 1965-07-14 1968-05-22 Hell Rudolf Dr Ing Fa Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen
US3538246A (en) * 1968-05-22 1970-11-03 Southern Pacific Transport Co Bandwidth reduction technique for analog signals
US3495032A (en) * 1968-10-07 1970-02-10 Graphic Transmission Systems I Bandwidth reduction system
US3761610A (en) * 1971-02-16 1973-09-25 Graphics Sciences Inc High speed fascimile systems
DE2114149C3 (de) * 1971-03-24 1973-09-20 Robert Bosch Fernsehanlagen Gmbh, 6100 Darmstadt Amphtudendiskriminator fur eine Schaltungsanordnung zur Erzeugung eines Korrektursignals zur Flankenverstelle rung von Impulsen
US3795765A (en) * 1971-12-29 1974-03-05 Xerox Corp Alternate analog encoding method and apparatus

Also Published As

Publication number Publication date
IT1095722B (it) 1985-08-17
AU3577078A (en) 1979-11-08
DE2720079A1 (de) 1978-11-09
YU101778A (en) 1982-08-31
IT7822932A0 (it) 1978-05-03
CH627317A5 (en) 1981-12-31
SE7804769L (sv) 1978-11-06
BE866727A (fr) 1978-09-01
DE2720079C3 (de) 1981-11-05
DK191378A (da) 1978-11-06
NO781338L (no) 1978-11-07
NL7804772A (nl) 1978-11-07
DE2720079B2 (de) 1981-01-22
FI781369A (fi) 1978-11-06
AU518941B2 (en) 1981-10-29
AT372561B (de) 1983-10-25
FR2390056A1 (sv) 1978-12-01
ATA303978A (de) 1983-02-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee