Horology: time measuring systems or devices – Cases – Adaptable
Patent
1993-03-19
1994-02-08
Powell, Mark R.
Horology: time measuring systems or devices
Cases
Adaptable
H04N 521
Patent
active
052852806
ABSTRACT:
A system and process are disclosed for cancelling ghosts in a sampled, received video signal. An extraction circuit extracts a received ghost cancelling reference signal from a received video signal transmitted through a multipath channel. The received ghost cancelling reference signal and an ideal ghost cancelling reference signal are inputted to a digital signal processor. Therein, the digital signal processor computes a nearby ghost tap coefficient signal by dividing the autocorrelation of an ideal GCR signal by the cross-correlation of the ideal and received GCR signals. A band of this tap coefficient signal above the upper cutoff frequency of the received video signal is filled with a constant, non-zero value. The sampled, received video signal is then filtered in a transversal filter with the filled tap coefficient signal.
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Lo Ching-Shyang
Teng Chich-Yeuan
Industrial Technology Research Institute
Powell Mark R.
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