H.264 improves the coding efficiency by adopting rate distortion optimization (RDO); however,it yields high computa-tional complexity. In order to reduce the intra-frame coding time,a fast and effective intra-predicti...H.264 improves the coding efficiency by adopting rate distortion optimization (RDO); however,it yields high computa-tional complexity. In order to reduce the intra-frame coding time,a fast and effective intra-prediction mode selection algorithm is proposed. The minimum sum of absolute differences between sub-block and its marginal weighted-pixels are used for selecting the candidates of prediction modes to speed up the intra-prediction process with an early termination criterion. Experimental results show that the proposed method can reduce the encoding time by more than 63% comparing with JM (Joint Model) software and is better than the previous algorithms,with negligible loss of coding performance.展开更多
基金Supported by the National High Technology Research and Development Program of China (863 Program) (2006AA040307)
文摘H.264 improves the coding efficiency by adopting rate distortion optimization (RDO); however,it yields high computa-tional complexity. In order to reduce the intra-frame coding time,a fast and effective intra-prediction mode selection algorithm is proposed. The minimum sum of absolute differences between sub-block and its marginal weighted-pixels are used for selecting the candidates of prediction modes to speed up the intra-prediction process with an early termination criterion. Experimental results show that the proposed method can reduce the encoding time by more than 63% comparing with JM (Joint Model) software and is better than the previous algorithms,with negligible loss of coding performance.
