Simultaneous multichannel television access control system and method
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United States of America Patent
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-
May 19, 1998
Issued Date -
N/A
app pub date -
May 3, 1995
filing date -
Jan 8, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multichannel television access control system is disclosed wherein processing of the broadband signal is performed by gated coherent RF injection on a plurality of channels, thereby effecting selective descrambling of an arbitrary subset of channels in a channel group. The system provides for a closed loop injection signal phasor control so as to maintain substantially constant relationship between the television signals and the injected signals. The combined signals are supplied to subscribers enabling the use of their cable ready equipment.
First Claim
Family
International Classification(s)
Cited Art Landscape
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