Apparatus and method for multiresolution encoding and decoding

摘要

A motion image decoding apparatus (200) for generating a prediction signal in blocks is provided with a low-resolution block decoder (151) for generating a low-resolution block with a smaller number of pixels than that of a prediction block by decoding encoded data. The motion image decoding apparatus (200) is further provided with an enhanced block generator (154) for enhancing a low-resolution block generated by a decoded low-resolution block to a block with the same number of pixels as that of the prediction block using a decoded image. Furthermore, the motion image decoding apparatus (200) is provided with a block divider (162) for generating plural small blocks by dividing an enhanced block based on a predetermined division rule and a small block predictor (152) for generating a predicted small block of a small block using a decoded image and the plural small blocks.