Selective viewing control system for CATV

Details Selective viewing control system for CATV Selective viewing control system for CATV

1987-11-13

1988-12-20

Buczinski, Stephen C.

Cryptography

Cryptanalysis

358 86, 380 20, H04N 7167, H04N 710

Patent

active

047929715

ABSTRACT:
A selective viewing control system for controlling viewing access to designated channels in a CATV system. A CATV control center sends to viewing control units a digital signal indicating which channels are to be jammed. In response, the viewing control unit produces a jamming signal, added with the unjammed television signal, containing frequency bursts at timed intervals. Each frequency burst corresponds to a single channel to be jammed. A digitally controlled phase-locked loop circuit is employed to generate the jamming signal.

REFERENCES:
patent: 4148064 (1976-04-01), Reed
patent: 4222067 (1980-09-01), Stern et al.
patent: 4434436 (1984-02-01), Kleykamp et al.
patent: 4450481 (1984-05-01), Dickinson
patent: 4521809 (1985-06-01), Bingham et al.

Affiliated with

Also associated with

Rating

Selective viewing control system for CATV does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selective viewing control system for CATV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selective viewing control system for CATV will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1913811