1. A video signal processing method, comprising: generating a plurality of plane coefficients and combination coefficients using digital data corresponding to a plurality of fields of an input video signal; convoluting filter masks composed of the plane coefficients with corresponding data windows of the input video signal to produce a first chrominance signal C 1 , a second chrominance signal C 2 and a third chrominance signal C 3 ; and combining the first, second and third chrominance signals C 1 -C 3 using the combination coefficients to generate a C signal of the input video signal.