Patent ID: 8199256

Claim:
A three-dimensional Y/C separating circuit, comprising: a first separating section configured to separate a first correlation luminance signal and a first correlation color signal from a composite video signal using an in-screen correlation of the composite video signal; a first delaying section configured to delay a color signal in the composite video signal by an inversion period thereof to produce a delayed composite video signal; a second separating section configured to separate a second correlation luminance signal and a second correlation color signal from the delayed composite video signal and the composite video signal using the interscreen correlation of the composite video signal; a luminance motion detecting part configured to output a first frame correlation signal containing a luminance motion component obtained by a subtraction processing between the delayed composite video signal and the composite video signal; a first adding section configured to output a mixed video signal containing a color motion component and a luminance component obtained by an addition processing between the delayed composite video signal and the composite video signal; a second delaying section configured to delay the mixed video signal by one frame period and output the delayed mixed video signal; a first subtracting section configured to remove the luminance component by a subtraction processing between an input and an output of the second delaying section and output a second frame correlation signal containing the color motion component; a determining section configured to determine a motion of the composite video signal from the first and second frame correlation signals and output first and second mixing ratio controlling signals; a first mixing section configured to output a luminance signal obtained by mixing the first and second correlation luminance signals in a mixing ratio determined by the first mixing ratio controlling signal; and a second mixing section configured to output a color signal obtained by mixing the first and second correlation color signals in a mixing ratio determined by the second mixing ratio controlling signal.