Unauthorized channel jamming signal applying method for CATV sys

Details Unauthorized channel jamming signal applying method for CATV sys Unauthorized channel jamming signal applying method for CATV sys

1986-04-03

1988-04-12

Boczinski, Stephen C.

Cryptography

Cryptanalysis

380 6, 380 8, 380 19, H04N 7167

Patent

active

047379901

ABSTRACT:
In a jamming signal applying device connected between a cable and subscribers' terminal units in a CATV system, a signal for scrambling the video signal is produced in a time sharing mode, with the time sharing period being not uniform, and with sound disturbing long periods being mixedly interposed between picture disturbing short periods.

REFERENCES:
patent: 4099203 (1978-07-01), Garodnick
patent: 4434436 (1984-02-01), Kleykamp et al.
patent: 4521809 (1985-06-01), Bingham et al.
patent: 4623918 (1986-11-01), Chomet

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