Fast Mode Decision Algorithm in Inter Pictures Based on H.264/AVC
Guowei Teng, Emc Shanghai · Journal of Optoelectronics·laser · 2005
The H.264/AVC standard can achieve higher compression efficiency at the expense of more computational complexity than previous standards.In inter pictures,a macroblock(MB) has 7 kinds of inter modes with different block sizes and two kinds of intra modes with 4×4 and 16×16 sizes.The reference software performs a complex full search to determine the best mode,which adds the highest computational burden.In this paper,the fast mode decision algorithm is proposed that classifies all modes by both homogeneity and space-time correlation of MB.So computational complexity can be reduced greatly because just only part of modes would be chosen to compare with each other.The experiment results show that it can save about 35% of encoding time while maintaining similar visual quality.