A fast inter-frame prediction algorithm applied in H.264/AVC
Jianping Li · Journal of Optoelectronics·laser · 2013
H.264/AVC achieves higher compression efficiency than previous video coding standards.Howerer,this performance gain comes at the cost of an increased computational complexity due to the use of variable block-size motion estimation and multiple reference frames.Thus,it is very important for H.264/AVC to improve the coding speed,therefore this paper proposes a fast inter-frame coding algorithm applied in the H.264/AVC video coding standard.Firstly,the candidate modes of current MB are predicted based on moving and texture,excluding the coding modes with low probability to be selected by current MB;Secondly,the mode possibilty orders are estimated based on inter-layer and spatial correlations.then the modes are sorted into sequential list according to the possibility orders from high to low;Thirdly,the relationship between mode distribution and variation of quantization parameter,temporal and spatial correlation are estimated,then the rate-distortion early termination is proposed combining with the relationship;Finally,the modes are checked sequentially with the rate-distortion early termination.When the rate-distortion early termination condition is satisfied,the encoding procedure is terminated to improve the coding speed.The experimental results show that the encoding speed for the proposed algorithm can be improved by 72% with negligible coding loss.