Patent ID: 6288754
Filing Date: 2001-09-11
Classification: H04N

Abstract:
A YC separator comprising:thinning means for thinning a composite video signal including a luminance signal and a carrier chrominance signal multiplexed in a common band in response to a sub-Nyquist sampling signal to output a thinned composite video signal;first separation means for separating said carrier chrominance signal from said thinned composite video signal through inter-frame operation;second-separation means for separating said carrier chrominance signal from said composite video signal through intra-field operation;first high frequency component detecting means for detecting a first high frequency component in the separated carrier chrominance signal from said first separation means;second high frequency component detection means for detecting a second high frequency component in said carrier chrominance signal from said second separation means;first interpolation means for generating a first interpolated carrier chrominance signal from the separated carrier chrominance signal from said first separation means at an interpolation timing defined by said sub-Nyquist sampling signal through linear-interpolating;second interpolation means for selectively adding said detected second high frequency component to said first interpolated carrier chrominance signal in accordance with the detected first high frequency component to generate a second interpolated carrier chrominance signal;outputting means for outputting the separated carrier chrominance signal from said first separation circuit at the timing corresponding to said sub-Nyquist sampling signal and said second interpolated carrier chrominance signal at said interpolation timing; andluminance signal generation means for effecting subtraction between said composite video signal and an output of said outputting means to generate and output a separated luminance signal.