| 摘要 |
A encoding apparatus which encodes picture data obtained by decoding the encoded data includes a decision means for deciding whether a motion vector is generated or not in the encoding of the picture data based on a motion vector of the encoded data obtained by decoding, a motion vector generating means for generating a motion vector based on the picture data provided that the decision means decides to generate the motion vector and a motion prediction/compensation means for generating prediction picture data using the motion vector generated by the motion vector generating means when the decision means decides to calculate the motion vector, and generating the prediction picture data using the motion vector obtained by decoding when the decision means decides not to calculate the motion vector.
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