Digital video network with continuous audio presence at network

Details Digital video network with continuous audio presence at network Digital video network with continuous audio presence at network

1995-03-30

1997-07-08

Peng, John K.

Television

Two-way video and voice communication

User positioning

348 16, 348 17, 348588, 348598, 455 63, H04N 714, H04N 715, H04N 974, H04N 976

Patent

active

056466781

ABSTRACT:
A digital video network comprises a controller and network sites each coupled to the controller via communication paths. The network sites and controller include codecs for converting between encoded signals on the communications paths and video and audio signals in the network sites and in the controller. The controller also includes at least one unit for producing a quad split video signal from four video signals supplied thereto. The coders encode four audio signal channels and audio mixing control signals in each encoded signal. The decoder in each network site decodes the audio signal channels from the encoded signal which it receives, and is responsive to the control signal in the encoded signal to mix the decoded audio signal channels in a predetermined manner to provide a continuous audio presence at the network site, independently of whether or not the video signal in the encoded signal comprises the quad split video signal.

REFERENCES:
patent: 5003532 (1991-03-01), Ashida et al.
patent: 5382972 (1995-01-01), Kannes
patent: 5408261 (1995-04-01), Kamata et al.
patent: 5453780 (1995-09-01), Chen et al.
patent: 5537141 (1996-07-01), Harper et al.

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