Patent ID: 8798161

Claim:
Decoding device for a data flow of digital images, comprising: a working memory for data of already decoded image blocks, a pilot, mounted to analyze an incidental flow of data of digital images, and arranged to determine data to be decoded for a current block, said data to be decoded being of the complete data type or of the parameters-data type, to store the complete data in the working memory as data of already decoded image blocks, and to call a decoding unit with the parameters-data, the decoding unit reacting to the reception of parameters-data by: selecting some of the already decoded image blocks located in the already decoded part of the image and beyond the approximation vicinity, said image block forming an approximation base, according to a selected rule, calculating an approximation of the current block, based on a linear algebraic function of the approximation base data, and storing in the working memory, for the current block, already decoded image blocks data derived from this approximation, wherein the decoding unit comprises: an approximation vicinity selector, arranged to select already decoded image blocks data corresponding to a close vicinity of the current block, and an approximation base selector, arranged to select already decoded image blocks data corresponding to a wide vicinity of the current block, and a calculator, arranged to carry out the aforementioned linear algebraic function with the approximation base data to approximate the approximation vicinity data.