Patent ID: 8330860
Filing Date: 2012-12-11
Classification: H04N

Abstract:
1. A color signal processing circuit comprising: an analog-to-digital (A/D) converter configured to convert an analog television signal into a digital signal by using a clock; a color signal demodulation circuit configured to color-demodulate the television signal converted into the digital signal by the A/D converter; a clock generation section configured to generate the clock that is used by the A/D converter; and a frequency control section configured to control a clock frequency of the clock generation section based on a color subcarrier frequency of a color signal included in the analog television signal and based on a vertical synchronization signal frequency of the analog television signal, wherein the frequency control section is further configured to control the clock frequency of the clock generation section so that a frequency difference between a frequency of a fold-back harmonic component included in an output of the A/D converter and the color subcarrier frequency of the color signal included in the analog television signal becomes an odd multiple of one-half the vertical synchronization signal frequency of the analog television signal.