MOVING IMAGE ENCODER, MOVING IMAGE ENCODING METHOD, AND MOVING IMAGE ENCODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem of an image encoding method using motion compensation prediction in which reduction in a total code amount is required by compressing encoding information.

SOLUTION: A moving image encoder includes: a prediction motion vector candidate generation section 121 for generating a plurality of prediction motion vector candidates in accordance with prediction based on any one of motion vectors of an encoding object block and an encoded block adjacent to the encoding object block, both of the blocks being in the same picture; a prediction motion vector candidate registration section 122 for registering the prediction motion vector candidates by associating information on a distance between pictures with a prediction motion vector value before scaling calculation processing; a prediction motion vector scaling calculation section 127 for performing a scaling calculation of a prediction vector value of a selected prediction motion vector in accordance with a distance between pictures; and an encoding section 109 for encoding a differential motion vector between a prediction motion vector after scaling calculation processing and the motion vector of the encoding object block, together with information showing an index of the selected prediction motion vector.

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