Patent ID: 9167263
Filing Date: 2015-10-20
Classification: H04N

Abstract:
1. A method for coding an image split up into partitions, said method comprising: selection of at least one mode of coding, wherein the mode of coding is associated with specific values of a plurality of coding information items, each coding information item having a number of possible values; and selecting the associated specific values of the coding information items; prediction , with the aid of said selected mode of coding, of the data of a current partition as a function of at least one already coded reference partition, delivering a predicted partition; determination of residual data, by comparing data relating to said current partition and to said predicted partition; transmission of a data signal comprising at least said determined residual data and said coding information items associated with the mode of coding selected, choosing one of the coding information items; wherein, prior to the transmission step, the method comprises: calculation of the value of a function representative of the residual data determined, which function is calculated modulo the number of possible values associated with the chosen coding information item, comparison of said calculated value with the specific value of the chosen coding information item, in case of equality between the two values, the data signal transmitted comprises the residual data determined and the specific values of the coding information items associated with the mode of coding selected, with the exclusion of said chosen coding information item, and in case of inequality between the two values, modification of the determined residual data so that the value of the function representative of the residual data is equal to the specific value of the chosen coding information item, the data signal transmitted comprising the modified residual data and the coding information items associated with the mode of coding selected, with the exclusion of said chosen coding information item.