Encoding device for a flow of digital images and corresponding decoding device

Device for encoding of a data flow of digital images, comprising:

• a working memory for already encoded image blocks data,
• a pilot, mounted to analyze an incidental flow of data of digital images, and arranged to determine data to be encoded of a current block being of the complete data type or of the parameters-data type, to store the complete data in the working memory as already encoded image blocks data, and to call an encoding unit with the parameters-data,
• the encoding 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 encoded image blocks data and data to be decoded derived from the approximation of the current block, wherein the encoding unit comprises:
• an approximation vicinity selector, arranged to select already encoded image blocks data corresponding to a close vicinity of the current block, and
• an approximation base selector, arranged to select already encoded image blocks data corresponding to an expanded 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.