DECODING APPARATUS, DECODING METHOD, PROGRAM AND INTEGRATED CIRCUIT

摘要

A decoding apparatus (100) includes: a first memory unit (20) storing pixel data of a decoded reference image to be referred to in decoding; a second memory unit (30) having a storage capacity smaller than that of the first memory unit (20) and providing a data reading speed faster than that provided by the first memory unit (20); a search area transfer unit (40) transferring, from the first memory unit (20) to the second memory unit (30), pixel data in a search area that is a part of the reference image and required to calculate a motion vector for the block; a motion vector operating unit (50) calculating the motion vector by repeatedly (i) reading out, from the second memory unit (30), the pixel data and (ii) performing a predetermined operation on the pixel data; and a decoding unit (60) decoding the block using the calculated motion vector.