CATV system and method of curtailing reception of unauthorized service channels
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United States of America Patent
Stats
-
Aug 18, 1987
Grant Date -
N/A
app pub date -
Jan 17, 1986
filing date -
Jan 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An 'Anti-Piracy' system and method are disclosed which includes an FSK modulator at the head end CATV transmitting location which, in response to data from an addressing computer, randomly issues Anti-Piracy commands (APC) which are transmitted to the set-top converters in the system. The converters are programmed to anticipate an interrupt in the FSK RF signals following the reception of an APC signal. The system and method are designed to curtail piracy by the use of audio recording techniques which have been used to obtain unauthorized service.
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