H.264帧内预测模式选择快速算法的研究  

ON FAST ALGORITHM OF INTRA-PREDICTION MODE DECISION FOR H.264

作　　者：谢翠兰[1] 张爱科[1] 黄力 

机构地区：[1]柳州职业技术学院信息工程系,广西柳州545006

出　　处：《计算机应用与软件》2009年第9期106-107,156,共3页Computer Applications and Software

基　　金：广西教育厅科研项目(200808LX237)

摘　　要：帧内预测模式选择是影响H.264编码速率的瓶颈问题。在分析H.264帧内预测模式选择快速算法研究现状的基础上,提出一种改进算法,利用空域特征筛选Intra_4×4预测模式并结合提前中止策略来减少不必要的模式选择计算。实验结果表明:该算法在基本保持编码性能的情况下使得帧内编码时间大为降低。Intra-prediction mode decision is the bottleneck in H. 264 encoding rate. In this paper, an improved algorithm is proposed on the basis of the analysis of the study status of fast algorithm of intra-prediction mode decision for H. 264. The feature in spatial domain is utilized to filter out some prediction modes for Intra_4 x 4 and early termination technology is employed to avoid unnecessary computations of mode decision. Experimental results show that the proposed algorithm decreases the time of intra coding significantly with little degradation in coding gain

关 键 词：帧内预测 模式选择 快速算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TN919.81[自动化与计算机技术—计算机科学与技术]