Patent ID: 8325807
Filing Date: 2012-12-04
Classification: H04N

Abstract:
1. A method of coding a video signal, comprising: (a) analysing pictures to obtain, in respect of each region thereof analysed, a measure of predictive power, each measure being dependent on the similarity of the region to another region for which it is to be used as a predictor, wherein the said other region for which the respective region is to be used as a predictor is a region of another frame, and (b) coding the signal, using a computer processor implementing a differential coding including inter-frame differential coding, with a quantisation parameter that varies as a function of the measures of predictive power; wherein each measure of predictive power is calculated cumulatively in that, when a region is similar to the region for which it is to be used as a predictor, the measure depends also upon the measure calculated in respect of the latter region, and wherein the analysing comprises: