Fast intra-prediction mode decision algorithms in H.264
Chuan Tian, Yongsheng Wang · Journal of Computer Applications · 2006
Intra-prediction coding and mode decision based on Rate-Distortion Optimization(RDO) technique were used in the H.264,which raised the compression ratio,but increase the computing complexity as well.Intra-prediction coding includes Intra_4×4 and Intra_16×16 prediction mode.Based on the analysis of the features of Intra_4×4 and Intra_16×16,a threshold was proposed to save computation.Then,the algorithms for intra-prediction mode decision was modified.The experimental results show that the proposed algorithm can increase the speed of intra coding significantly with negligible loss of PNSR and increase of bite-rate.