4×4 intra prediction mode selection algorithm in H.264/AVC
Yujuan Si · Journal of Computer Applications · 2007
Based on the analysis of intra-prediction technology,a fast 4×4 intra-prediction mode selection algorithm was proposed.The comparability between the current 4×4 block and the spatial/temporal 4×4 block was computed,and whether to skip the process of mode decision was decided.For other 4×4 blocks,some less probable modes were eliminated based on Sum of Absolute Transformed Difference(SATD) and temporal/spatial correlation.Experimental results show that compared to JM10.2,for IIII structure: timesaving is 44.07%;for IPPP structure: timesaving is 20.49%.The bit rate and Signal to Noise Ratio of Y(SNRY) are almost invariable.