System for compensating timing errors during sampling of signals

Details System for compensating timing errors during sampling of signals System for compensating timing errors during sampling of signals

1988-12-28

1991-01-29

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358320, 358326, H04N 989

Patent

active

049890735

ABSTRACT:
At the input to a video signal time base corrector, the phase error is sampled during each burst interval and is used to control the operation of an analog-to-digital convertor to compensate for phase errors at the start of each line. Progressive phase errors are predicted during each line and compensated. Any residual phase error at the start of a line is detected and applied to a phase error compensator for eliminating the residual phase error. The residual phase error and the video signal are processed through separate signal paths, and the frequency and phase characteristics of the residual phase error path are adjusted to those of the video signal path.

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