A video signal processing apparatus comprises a digital filter (118) for passing a specific frequency band of a digitized input luminance signal; non-linear processing means (122) for non-linearly processing the signal passed through said digital filter (118); and arithmetic means (123) for mixing said digitized input luminance signal directly or after delayed by a specific time with an output signal of said non-linear processing means, wherein the passing band component of said digital filter (118) is suppressed or emphasized depending on the input signal amplitude of said non-linear processing means. An embodiment for two-dimensional processing is also disclosed using a plurality of filters and a plurality of non-linear processing means with a single arithmetic means for mixing the outputs of the non-linear processing means.