Multiple subscriber video-on-demand system
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United States of America Patent
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Jul 13, 1999
Grant Date -
N/A
app pub date -
May 3, 1996
filing date -
May 3, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system which makes use of existing coax wiring to provide video-on-demand to individual subscribers. IP addressable, bi-directional video switches are used to replace traditional set-top cable boxes. The video switches are controlled by a network server which communicates with them over the existing coax wiring by using one of the frequencies previously used to transmit a VHF channel. The network server also controls video servers and a video head end, and it interfaces with the coax by means of a head end IP tap. Consequently, the network server can receive the subscriber's request for particular video programming, and it can order a video server to provide such programming to the subscriber, coordinating the programming, any desired frequency shifting, and the selection of the frequency on which the programming should be transmitted by the video head end and received by the subscriber's video switch.
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