In order to perform noise correction by digital processing, a mixed video signal obtained by mixing an input video signal and a low-pass video signal at a predetermined ratio corresponding to a contour signal is set as an output video signal, and a low-pass video signal (video signal level) is extracted from the contour signal, , The proportion of the low-pass video signal included in the mixed video signal is high in a portion where the outline signal is small (a portion where the image is flat), and in the portion (contour portion) where the outline signal is large, The mixing ratio is controlled so that the ratio of the low-pass video signal included in the mixed video signal is lowered.
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