Dropout compensator for color television

Claim 1

In a system for providing dropout compensation for a demodulated color video signal wherein a dropout compensating signal is substituted for the demodulated color video signal during a dropout, first means coupled to receive the demodulated color video signal for delaying the received signal a particular interval of time to assure a delayed color video signal. a second means coupled to receive the delayed color video signal for conducting the luminance information of the received signal while substantially attenuating the chrominance information of the received signal. a third means coupled to receive the demodulated color video signal and the delayed color video signal for phase comparing chrominance information of the received signals for providing a processed chrominance information signal having a particular phase relative to the phase of the chrominance information of the demodulated color video signal, and fourth means coupled to receive the luminance information conductor by said second means and the processed chrominance information signal for adding the received signals to provide a dropout compensating signal, the third means including, a first bandpass filter coupled to receive the delayed color video signal for conducting the chrominance information and for substantially attenuating the luminance information: a variable phase shifter coupled to receive the chrominance information conducted by the bandpass filter and an error signal for conducting the received chrominance at a particular phase angle in response to the error signal; a processor coupled to receive the chrominance information conducted by the variable phase shifter for providing a processed chrominance information signal having substantially the same phase angle as the demodulated color video signal; a second bandpass filter coupled to receive the demodulated color video signal for conducting the chrominance information and for substantially attenuating the luminance information; a phase comparator coupled to receive the chrominance information conducted by the second bandpass filter and the processed chrominance information signal for providing the error signal related to the phase difference between the received signals.