Line tilt compensation method and apparatus

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

1986-12-15

1988-10-11

Cangialosi, Salvatore

Cryptography

Cryptanalysis

380 14, 358167, H04K 102

Patent

active

047776480

ABSTRACT:
An improved technique for removing line tilt and other types of line rate correlated noise interjected into the active portions of a video signal during transmission and reception of the video signal. The improved technique involves measuring the amplitude of the line rate correlated noise in a received video signal at points sampled across the active portions of a plurality of lines in the video signal. The video lines used for measurement are preferably constant-amplitude dummy video lines inserted into the video signal at the bottom of each video field prior to transmission of the video signal. A complementary line-rate-correlated noise waveform, based on the amplitude measurements, is then generated and summed with the active portions of the received video signal to remove the line rate correlated noise from the video signal.

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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.
Bannai, Tatsushi et al., "Wideband Video Signal Recorder Having Level and Linearity Corrector," IEEE Technical Paper Presented at International Conference on Consumer Electronics, Jun. 6, 1986, pp. 248-249.

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