Line tilt compensation method and apparatus

Details Line tilt compensation method and apparatus Line tilt compensation method and apparatus

1985-09-09

1990-08-21

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 10, 380 20, H04N 7167

Patent

active

049513141

ABSTRACT:
A method and apparatus that compensates for line tilt in a video line scrambled by a line spin scrambling technique. Line spin scrambling provides relatively secure transmission of video signals, with a modest amount of complexity and cost. However, line spin scrambling suffers from certain distortions that corrupt the unscrambled video signal. One of these distortions is caused by line tilt, and results in a chaotic hashing of luminance striations in a received picture. The method of the invention includes the steps of measuring the amplitude of the line tilt introduced into a video signal, generating a complementary ramp based on the measured amplitude, and summing the complementary ramp with the spun video line.

REFERENCES:
patent: 4389671 (1983-06-01), Posner et al.
patent: 4488176 (1984-12-01), Bond et al.
patent: 4547802 (1985-10-01), Fogarty et al.
patent: 4562465 (1985-12-01), Glaab
Baxes, Gregory A., "Digital Techniques Cure Line Segmentation Scrambling Problems," NCTA Technical Paper presented at Las Vegas Convention, Jun. 2-5, 1985, pp. 308-313.

Affiliated with

Also associated with

Rating

Line tilt compensation method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Line tilt compensation method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line tilt compensation method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1684615