H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/20
H04N 7/16 (2006.01)
Patent
CA 2031603
Television service denial apparatus comprises a microprocessor controller for controlling the generation of a control signal waveform. The control signal toggles a program denial device between first and second conditions. The program denial device, responsive to the control signal waveform, only periodically outputs a television signal spectrum to which a sophisticated television receiver is able to synchronize. Consequently, the program denial device may be a device having only 20 dB of signal isolation. In one embodiment, the program denial device comprises a signal modulator for modulating an incoming television signal spectrum including one continuous wave carrier channel having no superimposed video. A character generator, responsive to the microprocessor, generates a control signal waveform for controlling the operation of the signal modulator. Consequently, while all television channels are obfuscated by the signal modulator during a period of service denial, the continuous wave carrier is modulated with a message signal for delivering a message to the subscriber on the continuous wave carrier channel indicating why service is disconnected.
Blonder Tongue Investment Company
Sim & Mcburney
LandOfFree
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