Multiplex communications – Wide area network – Packet switching
Patent
1995-11-08
1996-10-29
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
348518, 348515, H04N 713
Patent
active
055703720
ABSTRACT:
A method and system in which lip synchronization is restricted to a single system in a multiple system communication of video data and audio data. In the preferred embodiment, the receiving system synchronizes video and audio signals for presentation. The originating system forms and processes video and audio signals separately. For many systems, the processing involves dissimilar delays. Consequently, when the information is transmitted through a network to the receiving system, the video and audio data is nonsynchronous. The originating system provides delay information that is indicative of the dissimilarity of video and audio processing time at the originating system. The delay information is utilized at the receiving system to determine an adaptive compensation delay for introduction at the appropriate video or audio processing path. By providing a single compensation delay for multi-system communications, the total delay is potentially reduced.
REFERENCES:
patent: Re33535 (1991-02-01), Cooper
patent: 5231492 (1993-07-01), Dangi et al.
patent: 5231649 (1993-07-01), Duncanson
patent: 5263025 (1993-11-01), Torii et al.
patent: 5467139 (1995-11-01), Lankford
patent: 5481543 (1996-01-01), Veltman
Olms Douglas W.
Patel Ajit
Siemens Rolm Communications Inc.
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