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MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD USING A DETERMINATION WHETHER OR NOT A REFERENCE BLOCK HAS TWO REFERENCE MOTION VECTORS THAT REFER FORWARD IN DISPLAY ORDER WITH RESPECT TO A CURRENT PICTURE
MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD USING A DETERMINATION WHETHER OR NOT A REFERENCE BLOCK HAS TWO REFERENCE MOTION VECTORS THAT REFER FORWARD IN DISPLAY ORDER WITH RESPECT TO A CURRENT PICTURE
A moving picture coding apparatus includes: an inter prediction control unit which determines to code a motion vector using, among candidate predicted motion vectors, a candidate predicted motion vector having the least error with relative to a motion vector derived by motion estimation; a picture type determination unit which generates picture type information; a temporal direction vector calculation unit which derives a candidate predicted motion vector in temporal direct; and a co-located reference direction determination unit which generates, for each picture, a co-located reference direction flag.
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