Ghost reduction circuit for television receiver

Claim 1

A ghost reduction circuit apparatus for a television receiver, comprising: (a) first waveform conversion means including a plurality of first delay elements connected in cascade with one another between an input terminal and an output terminal of the apparatus for a video signal and each first delay element having a first delay characteristic and a plurality of first amplifiers connected to the input side of said first delay elements, respectively; (b) second waveform conversion means including a plurality of second delay elements connected in cascade with one another and each second delay element having a second delay characteristic and a plurality of second amplifiers connected to the input side of said second delay elements, respectively; (c) coupling means for coupling the final end of said second waveform conversion means to one of said first delay elements of said first waveform conversion means; (d) ghost detecting means for detecting ghost signal components contained in said video signal; (e) automatic gain control means for controlling the gains of said first and second amplifiers on the basis of the result of the ghost detection effected by said detecting means so that a major portion of said ghost signal components is eliminated by said first waveform conversion means while the residual ghost signal components are eliminated by said second waveform conversion means; and (f) wherein said first and second amplifiers have inputs connected to said output terminal and said input terminal for the video signal, respectively, and having outputs connected to input terminals of the associated delay elements, respectively, said coupling means coupling the output of the final one of said second cascaded delay elements to the input of selected one of said first delay elements under the control of said automatic gain control means.