VISUAL PERCEPTION CONVERSION CODING OF IMAGE AND VIDEO

摘要

PROBLEM TO BE SOLVED: To provide a method of changing signaling of a conversion coefficient on the basis of perception characteristics of video content.SOLUTION: A method which decodes video and in which the video is encoded and represented by a block in a bit stream, includes for each block: a step of obtaining movement related to the block from the bit stream; a step of mapping the movement to an index indicating a subset of a quantized conversion coefficient decoded from the bit stream by using a model; and a step of performing reinsertion by allocating a value to the quantized conversion coefficient which is not in the subset. Each step is executed in a decoder.