Multilocation video conference terminal including controllable c

Details Multilocation video conference terminal including controllable c Multilocation video conference terminal including controllable c

1983-10-26

1985-07-16

George, Keith E.

179 18BC, H04M 1100, H04M 356, H04N 714

Patent

active

045298408

ABSTRACT:
In a multilocation video conference system, conference locations are dynamically added to or deleted from an ongoing conference without disrupting it. This is realized by controllably enabling or disabling communications ports assigned to the conference locations in a Multilocation Conference Terminal (MLCT). Both audio information and control channel information transmitted from a conference location assigned to a port are monitored to determine if the audio information is satisfactory and if the control channel communication is "good". If the audio information is unsatisfactory, it is muted and selection of the video from that location as a one-and-only-one talker is inhibited. If the control channel communication is not good the video signal from the conference location is excluded from the conference.

REFERENCES:
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patent: 3601530 (1971-08-01), Edson et al.
patent: 3718770 (1973-02-01), Reese
patent: 3944736 (1976-03-01), Shepard
patent: 4054908 (1977-10-01), Poirier et al.
"Teleconferencing", IEEE 1981 Conference on Communications, vol. 2, pp. 31.2.1-4, Jun. 1981, by David W. Kennett.
Bernard A. Wright, "The Design of PICTUREPHONE.RTM. Meeting Service (PMS) Conference Centers For Video Teleconferencing", IEEE Communications Magazine, pp. 30-36, Mar. 1983.
Audrey J. Kames and W. Gordon Heffron, "Human Factors Design of PICTUREPHONE.RTM. Meeting Service", GLOBECOM '82 Conference Record, vol. 3, pp. 976-981, 1982.

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