Wire broadcasting system with subscriber controlled switched program selection
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 24, 1981
Grant Date -
N/A
app pub date -
Jul 23, 1980
filing date -
Aug 22, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wired broadcasting system comprising a central station at which a plurality of television signals are made available, a plurality of exchanges connected to the central station by a plurality of trunk cables on which the television signals are broadcast, and a plurality of subscriber units each connected to an exchange. Each subscriber unit is provided with means for controlling a respective selector at the exchange to select a desired one of the program signals for transmission to that subscriber. Each trunk cable carries a plurality of frequency division multiplexed signals and each selector comprises a first selecting means for selecting the signals on one said trunk cable and a second selecting means for selecting one of the signals on said one trunk cable for transmission to the respective subscriber unit.
First Claim
Family
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Cited Art Landscape
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