Selective deghosting of plural GCR-containing video signals

Claim 1

A video-signal-distortion reducing apparatus comprising: a filter circuit for selectively passing a first video signal and a second video signal therethrough, said first video signal having a first GCR signal in a first location of horizontal scanning lines thereof and said second video signal having a second GCR signal in a second location of horizontal scanning lines thereof, said filter having filter characteristics variable in accordance with a control signal supplied thereto; a timing generator for generating a first-video-signal selecting command on the basis of said first video signal and for generating a second-video-signal selecting command on the basis of said second video signal; a GCR waveform memory for storing said first GCR signal superimposed on said first video signal in accordance with said first-video-signal selecting command and for storing said second GCR signal superimposed on said second video signal in accordance with said second-video-signal selecting command; an arithmetic operational circuit for detecting a delay time and an amplitude difference of a one of said first GCR signal and said second GCR signal stored in said GCR waveform memory relative to a reference GCR signal to produce said control signal so as to vary said filter characteristic such that said delay time and said amplitude are minimized.