IMAGE CODING DEVICE, IMAGE DECODING DEVICE, IMAGE CODING METHOD, AND IMAGE DECODING METHOD

摘要

A quantization control section (33) refers to a transform table which is related to a sub-block used for motion-compensated prediction processing conducted in creating a predicted image and which is one of a plurality of transform tables stored in a transform table storage section (32), and transforms a quantization parameter corresponding to a macroblock into a quantization parameter corresponding to the sub-block. Using the quantization parameter corresponding to the sub-block, a quantization section (18) quantizes an orthogonal coefficient of a differential image output from an orthogonal transform section (17).