method for compacting; method for unzipping; compressed data set corresponding to an uncompressed data set; device for compressing and device for unzipping

摘要

the invention relates to a method for compacting a set of input data, in which the coefficients in the input data set are grouped into groups of coefficients, a number of bit planes, gcli, required to represent each group is determined, a quantization is applied, maintaining a limited number of bit planes, a prediction mechanism is applied to the gclis to obtain residues and an entropy encryption of the residues is performed. the entropy-encrypted residues and maintained bit plans allow the decoder to reconstruct the quantized data, at a minimal cost in metadata.