| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance prediction accuracy of a motion vector. <P>SOLUTION: A motion vector prediction device 1 comprises: a motion vector threshold determination unit 12 for determining a threshold of magnitude of a motion vector in a reference block to be smaller when image resolution is higher and also when a block size of the reference block is smaller; a motion vector accuracy determination unit 13 for determining whether the magnitude of the motion vector of the reference block exceeds the threshold determined by the motion vector threshold determination unit 12, for each reference block; and a prediction motion vector generation unit 14 for generating a prediction motion vector of a prediction target block by using a median or a mean value of motion vectors of one or more reference blocks. The prediction motion vector generation unit 14 generates the prediction motion vector by using motion vectors of reference blocks of which the magnitude is determined to be equal to or less than the threshold by the motion vector accuracy determination unit 13. <P>COPYRIGHT: (C)2013,JPO&INPIT |
