Scrambled signal detector

Details Scrambled signal detector Scrambled signal detector

1983-06-10

1987-06-09

Buczinski, S. C.

Cryptography

Key management

Having particular key generator

380 20, H04N 767, H04N 716, H04K 100

Patent

active

046724400

ABSTRACT:
A television converter includes a circuit for detecting scrambled signals and enabling the descrambler in response thereto. Scrambled signals are detected by sensing amplitude modulated digital tag information on the audio carrier. The descrambler is enabled if amplitude modulation is detected on the audio carrier during the portion of a horizontal line where digital information is expected, and also if no amplitude modulation is detected during a portion of the horizontal line where no data is expected. The scrambled signal detector of the present invention reduces the tendency for noise and other influences to enable the scrambler when viewing a clear, i.e. unscrambled, signal.

REFERENCES:
patent: 3530232 (1970-09-01), Reiter et al.
patent: 4095258 (1978-06-01), Sperber
patent: 4145717 (1979-06-01), Guif et al.
patent: 4511919 (1985-04-01), Forgey et al.

Affiliated with

Also associated with

Rating

Scrambled signal detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scrambled signal detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scrambled signal detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1832637