| abstract |
[PROBLEMS] To provide an MPEG-4 motion vector coding method suitable for reducing the overall bit rate and improving the coding efficiency. SOLUTION: A value having the smallest difference is searched for from three candidate motion vectors, and the difference value and a mode bit are transmitted. That is, one candidate having the lowest bit rate for motion vector encoding is selected from the three motion vector candidates, the motion vector prediction error and the prediction mode information are transmitted to the decoder, and the motion vector difference value is encoded. To estimate the minimum bit rate and encode the motion vectors for the X and Y components using minimum rate prediction. |