IMAGE DECODING METHOD, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE ENCODING DEVICE, IMAGE DECODING PROGRAM, AND IMAGE ENCODING PROGRAM

摘要

An image decoding method for decoding an image that is segmented into a plurality of blocks. In said image decoding method: decoded information from decoded blocks is obtained from a storage means that stores both decoded information from decoded blocks in an image being decoded and decoded information from decoded images; a prescribed decoded image is selected from among a plurality of decoded images; decoded information from a prescribed block in the selected decoded image is obtained; the obtained decoded information from decoded blocks and decoded information from a prescribed block is used to predict a segmentation mode which indicates the segment shape of a block to be decoded; segmentation-mode information which indicates a segmentation mode is decoded from encoded data; and the segmentation mode of the block to be decoded is determined from the predicted segmentation mode and the decoded segmentation-mode information.