IT1027920B - Metodo per trasmettere immagini in una trasmissione videotelefoni ca a larghezza di banda limitata - Google Patents

Metodo per trasmettere immagini in una trasmissione videotelefoni ca a larghezza di banda limitata

Info

Publication number
IT1027920B
IT1027920B IT30867/74A IT3086774A IT1027920B IT 1027920 B IT1027920 B IT 1027920B IT 30867/74 A IT30867/74 A IT 30867/74A IT 3086774 A IT3086774 A IT 3086774A IT 1027920 B IT1027920 B IT 1027920B
Authority
IT
Italy
Prior art keywords
video telephone
limited bandwidth
telephone transmission
transmitting images
images
Prior art date
Application number
IT30867/74A
Other languages
English (en)
Inventor
Gunnar Holmer Bo
Magnus Rodhe Peder
Daneil Curt
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of IT1027920B publication Critical patent/IT1027920B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • H04N7/122—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal involving expansion and subsequent compression of a signal segment, e.g. a frame, a line
    • H04N7/125—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal involving expansion and subsequent compression of a signal segment, e.g. a frame, a line the signal segment being a picture element

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
IT30867/74A 1973-12-20 1974-12-20 Metodo per trasmettere immagini in una trasmissione videotelefoni ca a larghezza di banda limitata IT1027920B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7317209A SE369570B (it) 1973-12-20 1973-12-20

Publications (1)

Publication Number Publication Date
IT1027920B true IT1027920B (it) 1978-12-20

Family

ID=20319457

Family Applications (1)

Application Number Title Priority Date Filing Date
IT30867/74A IT1027920B (it) 1973-12-20 1974-12-20 Metodo per trasmettere immagini in una trasmissione videotelefoni ca a larghezza di banda limitata

Country Status (8)

Country Link
US (1) US3976831A (it)
JP (1) JPS5093712A (it)
DE (1) DE2458642A1 (it)
FR (1) FR2255764B1 (it)
GB (1) GB1492570A (it)
IT (1) IT1027920B (it)
NL (1) NL7416369A (it)
SE (1) SE369570B (it)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074254A (en) * 1976-07-22 1978-02-14 International Business Machines Corporation Xy addressable and updateable compressed video refresh buffer for digital tv display
JPS5399826A (en) * 1977-02-14 1978-08-31 Hitachi Ltd Controller for data display
US4196447A (en) * 1978-04-17 1980-04-01 Arvin Industries, Inc. Facsimile to video converter
US4254438A (en) * 1978-12-13 1981-03-03 Kokusai Denshin Denwa Kabushiki Kaisha Coding method for facsimile signal
JPS564946A (en) * 1979-05-24 1981-01-19 Nec Corp Speed converter using charge transfer device
US4496976A (en) * 1982-12-27 1985-01-29 Rockwell International Corporation Reduced memory graphics-to-raster scan converter
JPS61114676A (ja) * 1984-11-09 1986-06-02 Nec Corp ブロツク符号化装置
US4716585A (en) * 1985-04-05 1987-12-29 Datapoint Corporation Gain switched audio conferencing network
US4710917A (en) * 1985-04-08 1987-12-01 Datapoint Corporation Video conferencing network
US4686698A (en) * 1985-04-08 1987-08-11 Datapoint Corporation Workstation for interfacing with a video conferencing network
US4914508A (en) * 1988-04-27 1990-04-03 Universal Video Communications Corp. Method and system for compressing and statistically encoding color video data
US4857993A (en) * 1988-04-27 1989-08-15 Universal Video Communications Corp. Method and system for decompressing digital color video statistically encoded data
US4847677A (en) * 1988-04-27 1989-07-11 Universal Video Communications Corp. Video telecommunication system and method for compressing and decompressing digital color video data
US5034813A (en) * 1990-07-24 1991-07-23 Analogic Corporation System for signal digitization by spaced interval sampling
US5202957A (en) * 1990-08-09 1993-04-13 Future Communications Full motion video telephone system
JPH10117144A (ja) * 1996-10-08 1998-05-06 Nec Ic Microcomput Syst Ltd Ａ／ｄコンバータ
US8849752B2 (en) * 2005-07-21 2014-09-30 Google Inc. Overloaded communication session

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663749A (en) * 1969-11-24 1972-05-16 Ibm Slow scan video method and system
US3822363A (en) * 1972-08-09 1974-07-02 Digi Log Syst Inc Portable computer terminal using a standard television receiver

Also Published As

Publication number Publication date
NL7416369A (nl) 1975-06-24
SE369570B (it) 1974-09-02
FR2255764B1 (it) 1978-07-07
FR2255764A1 (it) 1975-07-18
JPS5093712A (it) 1975-07-26
US3976831A (en) 1976-08-24
GB1492570A (en) 1977-11-23
DE2458642A1 (de) 1975-07-03

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