| 摘要 |
<p>A motion vector encoding efficiency is improved when a block is encoded by using a plurality of motion vectors. A motion vector encoding unit (117) encodes motion vectors received from a motion vector detecting unit (108). Motion vectors in each block are encoded by a difference value from a prediction value obtained from motion vectors in an encoded surrounding block. When a prediction value is to be generated, motion vectors referring to the same picture are referenced, motion vectors to be referred to are determined according to the sequence of motion vectors arrange in a predetermined sequence. A second and subsequent motion vectors use as reference values preceding motion vectors. When motion vectors referring to different pictures are referenced, scheduling or the like is made according to a difference in distance between pictures.</p> |
