MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD

摘要

A CODING CONTROL UNIT (11) AND MODE SELECTING UNIT (109) ARE INCLUDED. THE CODING CONTROL UNIT (110) DETERMINES THE CODING ORDER FOR A PLURALITY OF CONSECUTIVE B-PICTURES LOCATED BETWEEN I-PICTURES AND P-PICTURES SO THAT THE B-PICTURES WHOSE TEMPORAL DISTANCE FROM TWO PREVIOUSLY CODED PICTURE IS FARTHEST IN DISPLAY ORDER IS CODED BY PRIORITY SO AS TO REORDER THE B-PICTURE IN THE CODING ORDER. WHEN A CURRENT PICTURE IS CODED IN A DIRECT MODE, THE MODE SELECTING UNIT (109) SCALES A FORWARD MOTION VECTOR OF A BLOCK WHICH IS INCLUDED IN THE BACKWARD REFERENCE PICTURE OF THE CURRENT PICTURE AND CO-LOCATED WITH A CURRENT BLOCK, IF IT HAS BEEN USED FOR CODING THE BLOCK.