| 摘要 |
<p>SUPPRESSION OF CHROMINANCE SIGNAL CONTAMINATION OF THE LUMINANCE SIGNAL IN A VIDEO SIGNAL PROCESSING SYSTEM Apparatus in a video signal processing system for improving the quality of a color image reproduced by a color kinescope in response to chrominance and luminance components of the video signal, the chrominance signal being subject to phase transitions likely to generate chrominance subcarrier components sufficient to contaminate the luminance signal. Chrominance signals delayed by an amount corresponding to an interval during which the phase transitions can occur are supplied to inputs of a signal multiplier, which provides an output signal indicating the presence of chrominance phase transitions. The multiplier output signal is utilized for controlling the luminance signal processing channel to suppress the sideband signals, thereby also suppressing objectionable effects of the sideband signals otherwise visible in a reproduced image.</p> |
