Fast intra mode decision algorithm based on AVS
Jiao Mei · Computer Engineering and Applications Journal · 2009
AVS video standard adopts the Rate Distortion Optimization(RDO) technique to improve the compression performance in the intra prediction.Although the RDO algorithm can achieve the highest compression efficiency and the best picture quality,it increases the computational complexity.In this paper,a simple and effective fast intra mode decision algorithm for AVS1-P2 en-coder is proposed.This algorithm uses the correlation of the best modes of adjacent blocks and the directivity of luminance variations within a block to reduce the candidate modes to be tested,thus the coding time is saved.Experimental results show that the coding time of the proposed algorithm is decreased by 24%～27%,compared to the full search method in the reference soft-ware of AVS1-P2 with negligible loss of PSNR and increment of bit rate.