| 摘要 |
A moving picture decoding method including a prediction mode, in which prediction mode motion vector information of a current block in a current frame is not transmitted from an encoding side, including: in said prediction mode: selecting one reference frame from among a plurality of candidate reference frames including: a reference frame referenced by one or a plurality of adjacent blocks within a current frame and adjacent to a current block; and a prescribed reference frame not based on the reference frame referenced by the adjacent blocks, as the reference frame to be used in the prediction mode; determining a motion vector to be used in the prediction mode; and performing prediction processing using the selected reference frame and the determined motion vector, wherein determining motion vector information to be used for the current block in the prediction mode, based on availability of motion vector(s) of predetermined adjacent blocks and the current block belonging to the current picture and the predetermined adjacent blocks are decoded earlier than the current block.
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