Abstract

The motion vector prediction (MVP) is an important part of video coding. In the original median predictor, if the neighbor blocks of current block are intra-mode coded, their motion vectors (MVs) will be set to zeros for MVP of current block. This is not very precise for sequences with strong motion. This paper propose an improved motion vector prediction (MVP) scheme for H.264. In the proposed scheme, when there are intra-mode macroblocks beside current block, more MV of the neighbor inter-mode block is utilized instead of zero MVs of intra-mode macroblocks for MVP of current block. The experimental results show that the improved scheme achieves better coding efficiency than the original median predictor. Meanwhile the point obtained by the proposed MVP scheme is closer to the global minimum point, the following fast motion estimation (FME) computation complexity is reduced.

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