| 摘要 |
PURPOSE:To reduce the motion vector code volume by securing the continuity of motion vectors. CONSTITUTION:A reference original picture segmenting circuit 21 divides a reference original picture into blocks based on vector candidates while shifting the blocking position of the reference original picture within a prescribed search range. Original picture blocks are also given to an error calculating circuit 22, and error values are obtained by matching calculation between original picture blocks and blocks of the segmented reference original picture. A motion vector determining circuit 45 obtains at least one motion vector candidate showing the positional relations between blocks of the reference original picture and original picture blocks in accordance with error values. The motion vector candidate which the difference of the motion vector of the adjacent block stored in a memory 42 and each motion vector candidate is minimum is selected as the motion vector. Thus, the continuity of motion vectors of adjacent blocks is kept to reduce the motion vector code volume. |
