[old_tv_nut]

Can you explain a little more what you mean? It's clear that you want to input analog composite video, but what output are you looking for? A 3-D Fourier transform? Signal filtered into separate luminance and chrominance subcarrier signals?

Horizontal, vertical and temporal axes have been used in theoretical three-dimensional Fourier transform of scanned video systems. This is usually done in a computer program and leads to the design of hardware like comb filters for analog video.