Videocommunication network between videophone terminals and a pi

Details Videocommunication network between videophone terminals and a pi Videocommunication network between videophone terminals and a pi

1983-07-06

1985-08-06

George, Keith E.

Facsimile and static presentation processing

Static presentation processing

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179 2TS, H04M 1108, H04N 714

Patent

active

045339430

ABSTRACT:
A videocommunication network is connected between videophone terminals and a picture bank through voice switching units and wide-band switching units included in central offices. A purely telephonic communication can be established between two videophone terminals during a videocommunication between one of the two terminals and the picture bank. Once the videocommunication has been established between the videophone terminal and the picture bank via network voice switching units, the local telephone line assigned to the videophone terminal is automatically released while only a local wide-band line assigned to the videophone terminal is occupied for exchanging vision signals and also data signals with the picture bank via wide-band switching units.

REFERENCES:
patent: 3662110 (1972-05-01), Van Fossen et al.
patent: 3711648 (1973-01-01), Whitney
patent: 3922491 (1975-11-01), Bjork et al.
patent: 4292649 (1981-09-01), Macheboeuf
V. Berge et al., "The TN Television Telephone as a Data Sight Unit", Nachrichten Telef. & Normalzeit, (Germany), No. 72(1971), pp. 10-12.
Robin-Champigneul, Y. et al., "The French Videophone Set", Sid International Symposium, Digest of Technical Papers, Edition 1, May 1982, pp. 22-23.
Klein, P. et al., "Bildkommunikation mit Vicoset 200", Telcom Report, vol. 3, No. 2, Apr. 1980, pp. 117-121, Munchen, Germany (West).
Blineau, J. et al., "Didon: Data Packet Broadcasting System State of the Art", Radiodiffusion-Television, Feb. 1982, Paris, France.
"Didon-Antiope Technical Specifications", Radiodiffusion-Television, Jun. 1982, Paris, France.

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