Movement detection and y/c separation circuit for detecting a movement in a television display picture

DETAILED DESCRIPTION In view of the shortcomings of the above-described device in the related art, a primary object of the present invention is to provide an apparatus which does not erroneously detect movement due to leakage of the color component signal into the lower-frequency luminance component of the video signal.
It is also an object of the present invention to provide an apparatus which generates an auxiliary detection signal indicating a difference between frames of color components which have leaked into the corresponding Y/C separated luminance signals.
It is a further object of the present invention to provide an apparatus which generates, in accordance with first and second movement detection signals with respect to luminance and a movement detection signal with respect to color, a maximum value signal representing maximum movement after color separation, and which generates a synthesis ratio indicating an amount of deterioration in a correlation between adjacent display lines or adjacent display frames.
It is still a further object of the present invention to provide an apparatus which generates an auxiliary movement detection signal based upon a difference between corresponding video signals in adjacent frames which have not undergone Y/C separation, and which in response thereto generates a synthesis ratio indicating an amount of deterioration in a correlation between adjacent display lines or adjacent display frames.
It is also an object of the present invention to provide an apparatus which provides accurate Y/C separation and movement detection and which can be mounted on a single IC chip.
These and other objects are achieved by providing an apparatus according to the present invention which generates a first movement detection signal with respect to luminance, a second movement detection signal with respect to luminance, and a movement detection signal with respect to color.
The first movement detection signal with respect to luminance represents the difference between a luminance signal extracted by Y/C separation in a first frame and a luminance signal extracted by Y/C separation in a second, adjacent frame