IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODER, IMAGE DECODE, PROGRAM, COMPUTER DATA SIGNAL, AND IMAGE TRANSMISSION SYSTEM

摘要

An encoding mode to be applied is selected from encoding modes prepared by detecting a motion in image data D1 of an image present in a block, motion compensation of the image data is performed (step S101), and coded data D7 is created by subjecting an orthogonal transform coefficient D6 and encoding mode information D3 to variable-length encoding (S103). In the variable-length encoding of the encoding mode information, the probability table used for arithmetic encoding is changed for each binary code included in the binary pattern of the encoding mode information with reference to the encoding mode selected for the adjoining block. In such a way, an image encoding method enabling an improvement of the efficiency of data compression of the encoding mode information multiplexed to coded data, an image decoding method, an image encoder, an image decoder, a program, a computer data signal, and an image transmission system are realized.