Interactive television service utilizing both unidirectional and

Details Interactive television service utilizing both unidirectional and Interactive television service utilizing both unidirectional and

1994-08-19

1997-10-07

Peng, John K.

Television

Two-way video and voice communication

User positioning

348 17, 348 15, 348 14, 455 51, H04N 100

Patent

active

056753730

ABSTRACT:
The invention concerns an interactive television service in which multiple broadcasting facilities are interconnected through a single broadcast site so that each broadcast facility may interact freely with one another. A method is provided to allow a single broadcasting site to originate a broadcast and retain complete control of that broadcast in which all participating broadcasting sites can engage in two-way audio and full motion video discourse with the originating site as well as with all participating sites during the course of the broadcast. The method utilizes only two broadcast frequencies.

REFERENCES:
patent: 4360827 (1982-11-01), Braun
patent: 4386365 (1983-05-01), Gargini
patent: 4645872 (1987-02-01), Pressman et al.
patent: 4650929 (1987-03-01), Boerger et al.
patent: 4785472 (1988-11-01), Shapiro
patent: 5263869 (1993-11-01), Ziv-El
patent: 5394559 (1995-02-01), Hemmie et al.
William J. Clark, Multipoint Multimedia Conferencing, IEEE Communications Magazine, pp. 44-50 May 1992.

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