DEVICE AND METHOD FOR DETECTING MOTION VECTOR, DEVICE AND METHOD FOR ENCODING MOVING IMAGE, AND DEVICE AND METHOD FOR DECODING MOVING IMAGE

摘要

A device for detecting a motion vector which acquires information on the motion vector with a plurality of partitions of different sizes and rectangular shapes as a unit for each block of a predetermined size in which one screen is divided, the sizes of the blocks being the upper limit, comprises a partition combining means (23) for, if motion vectors for one of the blocks can be obtained in the plurality of partitions, determining whether or not to combine the plurality of partitions in which the motion vectors have been obtained and, when combining the plurality of partitions, including information on the motion vectors of the partitions after combination in information on a motion vector outputted from the device. The code amount associated with the motion vector can be suppressed.