Enhanced Inter Mode Decision Based on Contextual Prediction for P-Slices in H.264/AVC Video Coding

ETRI Journal

关键词: contextual mode information;    intra mode;    inter mode;    variable block mode;    H264/AVC;   

Others  :  1185378
DOI  :  10.4218/etrij.06.0105.0189

【 摘 要 】

We propose a fast macroblock mode prediction and decision algorithm based on contextual information for P-slices in the H.264/AVC video standard, in which the mode prediction part is composed of intra and inter modes. There are nine 4×4 and four 16×16 modes in the intra mode prediction, and seven block types exist for the best coding gain based on rate-distortion optimization. This scheme gives rise to exhaustive computations (search) in the coding procedure. To overcome this problem, a fast inter mode prediction scheme is applied that uses contextual mode information for P-slices. We verify the performance of the proposed scheme through a comparative analysis of experimental results. The suggested mode search procedure increased more than 57% in speed compared to a full mode search and more than 20% compared to the other methods.

   

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