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The rate distortion optimization (RDO) technique employed in H.264/AVC improve coding performance significantly, but a very high computational load is introduced. In this paper, an intra prediction mode prepruning algorithm based on orientation gradient is proposed to reduce RDO calculation. In the proposed algorithm, the gradients between the reference pixels and the current block pixels are calculated...
Picture-adaptive frame/field (PAFF) coding and macroblock-adaptive frame/field (MBAFF) coding in the new H.264/AVC can improve compression efficiency for interlaced video coding. It is assumed that the optimal solution can be found by employing a multi-pass strategy, which encodes a macroblock or picture with all possible modes and chooses the one with smallest rate-distortion cost, such as the three-pass...
In H.264/AVC fractional pixel motion compensation is adopted in order to achieve more accurate motion description and higher compression efficiency. It, however, remarkably increased computation load in motion estimation (ME) process for video coder. In this paper an improved fractional pixel ME algorithm is proposed to reduce its computation load, which is based on the fact that the distribution...
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