Improved fast inra prediction algorithm of H.264/AVC  

作　　者：LIU Qiong HU Rui-min ZHU Li ZHANG Xin-chen HAN Zhen 

机构地区：[1]School of Computer, Wuhan University, Wuhan 430079, China School of Computer, Wuhan University, Wuhan 430079, China The Key Laboratory of Multimedia and Network Communications Engineering, Wuhan University, Wuhan 430079, China The Key Laboratory of Multimedia and Network Communications Engineering, Wuhan University, Wuhan 430079, China The Key Laboratory of Multimedia and Network Communications Engineering, Wuhan University, Wuhan 430079, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2006年第z1期101-105,共5页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 60472040) supported by the National Natural Science Foundation of China

摘　　要：With advanced prediction modes of intra prediction, intra coding of H.264/AVC offers significant coding gains compared with previous video coding standards. It uses an important tool called Lagrangian rate-distortion optimization (RDO)technique to decide the best coding mode for a block, but the computational burden is extremely high. In this paper, we proposed an improved fast intra prediction algorithm including block type selection and mode decision algorithm based on analysis of edge feature of a block. Our algorithm filters out unlikely block type and candidate modes to reduce the RDO calculations. Experimental results showed that the proposed algorithm can reduce the computation complexity of intra prediction from 52.90% to 56.31%, with 0.04 dB PSNR degradation and 2% increase of bit rate.With advanced prediction modes of intra prediction, intra coding of H.264/AVC offers significant coding gains compared with previous video coding standards. It uses an important tool called Lagrangian rate-distortion optimization (RDO) technique to decide the best coding mode for a block, but the computational burden is extremely high. In this paper, we proposed an improved fast intra prediction algorithm including block type selection and mode decision algorithm based on analysis of edge feature of a block. Our algorithm filters out unlikely block type and candidate modes to reduce the RDO calculations. Experimental results showed that the proposed algorithm can reduce the computation complexity of intra prediction from 52.90% to 56.31%, with 0.04 dB PSNR degradation and 2% increase of bit rate.

关 键 词：H.264  AVC  INTRA prediction  VIDEO CODING 

分 类 号：TN919.8[电子电信—通信与信息系统]