Patent ID: 6570576
Filing Date: 2003-05-27
Classification: H04N

Abstract:
A method of processing input signal samples representative of at least part of a colour video image to produce legalised signal samples representative of a legal colour version of said image, said method comprising the steps of:generating an over sampled version of the input signal samples by generating at least one extra signal sample for each base input signal sample; generating adjustment factors from said input signal samples, which when combined with said input signal samples have an effect of converting illegal colour pixels of said colour video image into legal colour pixels; combining said adjustment factors with said input signal samples to produce an over sampled version of said legalised colour signal samples; and decimating said over sampled legalised colour signal samples to produce decimated legalised signal samples having a sampling rate corresponding to that of the base input signal samples, by selecting signal samples from the over sampled version of the legalised colour signal samples which have not changed with respect to the corresponding input signal samples, and if the signal samples have changed, combining a plurality of said over sampled legalised colour signal samples to produce said decimated legalised signal samples.