Image decoding and encoding apparatus

摘要

An image decoding apparatus comprises coded data decoding means for receiving and entropy-decoding coded data to acquire a motion vector generation condition as a necessary condition for generation of motion vectors, and coding information indicating prediction error image signals; an image memory for storing decoded image signals; motion vector generating means for generating the motion vectors based on the decoded image signals stored in the image memory, on the basis of the motion vector generation condition acquired by the coded data decoding means; predicted image signal generating means for generating predicted image signals, using the motion vectors generated by the motion vector generating means and the decoded image signals; decoding means for decoding the coding information acquired by the coded data decoding means, to acquire the prediction error image signals; and storing means for adding the predicted image signals generated by the predicted image signal generating means, to the prediction error image signals acquired by the decoding means, to reconstruct the decoded image signals, and for storing the decoded image signals into the image memory.