Television – Special applications – Manufacturing
Patent
1994-03-29
1997-05-13
Peng, John K.
Television
Special applications
Manufacturing
348 13, 455 42, H04N 7173
Patent
active
056297327
ABSTRACT:
In a multimedia application where movie events are distributed on an on-demand basis, a multimedia server serves a subscriber requesting a movie event through either a high-demand process or a low-demand process. In a low demand process, a data stream representative of the movie is exclusively provided to the subscriber in accordance with a double-buffering technique. The server may switch many low-demand processes serving the same movie event into a high-demand process to effectively utilize limited resources. In the high-demand process, high-demand pointers are launched periodically and are associated with data streams representative of the movie event having different start times. Each data stream associated with a high-demand pointer may be shared by an unlimited number of subscribers. Service alterations of the movie including fast-forwarding, rewinding, and restarting after a pause are achieved by way pointer-hopping.
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Moskowitz Alan S.
Rizkalla Michael
Grant Chris
Peng John K.
The Trustees of Columbia University in the City of New York
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