NTSC COMPONENT SEPARATION VIA HADAMARD-TRANSFORM

The authors present a technique for separating the NTSC composite sign al into its components (Y, I, Q) by applying an N x N Hadamard transfo rm directly to the composite signal sampled at four times the colour s ubcarrier. We show that the Y, I, Q component signals are mapped into specific areas in the Hadamard domain. Component separation is achieve d by assigning particular transform coefficients to each component sig nal. Simulation results of component separation applied to five colour images and one black and white test pattern are presented. Both signa l to noise ratios and subjective results are presented. The results in dicate that no noticeable degradation is expected in typical colour im ages.