| 摘要 |
It is hereby disclosed an image coding method for block-wise coding a digital image divided into a plurality of blocks, wherein each block is a two-dimensional block and has a plurality of pixels, the method coding each block as a target block by applying the steps of: determining (1) mode information (12) indicating a coding mode showing a status of pixels of a target block; and coding (3) pixel data of the target block, using the determined mode information (12) of the target block, characterized by coding (2) the determined mode information (12) on a per target block basis, by referring to the mode information of a plurality of previously coded blocks, each of which is adjacent to the target block within the same picture, and wherein the mode information indicating a coding mode, which is dominant in the plurality of previously coded blocks, is encoded with a shorter codeword than other mode information. Also the corresponding image encoder is hereby disclosed. |
