FIELD: computer technology.
SUBSTANCE: invention relates to computer technology. The image decoding device, which decodes the bit stream generated by the image encoding, contains the first decoding module, made with the ability to decode the block to be processed, using the first decoding process, which includes the conversion process, and a second decoding module that is capable of decoding the block to be processed using a second decoding process that does not include a conversion process, while the second decoding module is able to apply at least either a second decoding process using the intra-prediction mode, which uses a pixel not included in the block to be processed, or a second decoding process using a DPCM process based on the pixel included in the block to be processed.
EFFECT: improving the efficiency of lossless encoding compression.
9 cl, 13 dwg
