Patent ID: 7224407
Filing Date: 2007-05-29
Classification: H04N

Abstract:
1. A color demodulation device comprising: an AD converter for sampling a chrominance signal included in a television signal at a frequency 4×n (n is a natural number) times a color subcarrier frequency, thereby producing digital samples of the chrominance signal; a phase signal generator for generating a phase signal for identifying phases of a burst signal and color subcarrier signals modulated by respective B-Y and R-Y signals included in the chrominance signal; a burst data generator for producing burst data corresponding to digital samples of the burst signals which have predetermined phase relationships with the respective color subcarrier signals according to the phase signal; a selector for selectively outputting the generated burst data according to the phase signal; a multiplier for producing products of the selected burst data and the digital samples of the chrominance signal; and a low pass filter for producing digital samples of the respective R-Y and BY signals from the products.