Automatic chroma control

Claim 1

IN A COLOR TELEVISION RECEIVER ADAPTED TO REPRODUCE IMAGES IN COLOR IN RESPONSE TO COMPOSITE IMAGE SIGNALS HAVING A GIVEN FREQUENCY SPECTRUM AND HAVING A PLURALITY OF COMPONENTS INCLUDING A COLOR SUBCARRIER WAVE WHOSE AMPLITUDE IS FIXED DURING PREDETERMINED INTERVALS AND DURING OTHER INTERVALS IS A FUNCTION OF COLOR SATURATION OF A PLURALITY OF COLOR ASPECTS, AND A PERIODICALLY RECURRENT SYNCHRONIZING COMPONENT REPRESENTATIVE OF TELEVISION PICTURE SCANNING SYNCHRONIZING INFORMATION, THE COMBINATION COMPRISING: A SIGNAL AMPLIFIER FOR PROCESSING SAID COLOR SUBCARRIER COMPONENT AND HAVING AN INPUT CIRCUIT FOR RECEIVING SAID COLOR SUBCARRIER COMPONENT, AN OUTPUT CIRCUIT FOR DEVELOPING A PROCESSED VERSION OF SAID COLOR SUBCARRIER COMPONENT, AND GAIN CONTROLLING MEANS; MEANS RESPONSIVE TO SAID PROCESSED VERSION OF SAID COLOR SUBCARRIER COMPONENT DEVELOPED IN THE OUTPUT CIRCUIT OF SAID AMPLIFIER FOR PRODUCING A CONTROL SIGNAL IN ACCORDANCE WITH THE AMPLITUDE OF SAID SUBCARRIER COMPONENT OCCURRING DURING SAID PREDETERMINED INTERVALS; AND MEANS FOR IMPRESSING SAID PRODUCED CONTROL SIGNAL UPON THE GAIN CONTROLLING MEANS OF SAID AMPLIFIER IN A MANNER TO VARY THE GAIN OF SAID AMPLIFIER INVERSELY TO ANY AMPLITUDE VARIATIONS OF SAID SUBCARRIER COMPONENT OCCURRING DURING SAID PREDETERMINED INTERVALS.