摘要
在H.264/AVC视频编码过程中,编码时间受诸多因素影响,如帧间/帧内模式选择、率失真优化(RDO)等.JVT(Jo int Video Team)提供的参考软件采用全搜索算法进行帧内预测,其算法复杂度很高.为此,提出一种基于Radon变换的快速预测算法,通过对4×4块进行Radon变换求取其纹理方向,根据求取的纹理方向减少4×4块的预测模式,有效的降低了预测时间.实验结果表明本算法在信噪比和码率变化极小的情况下,编码速度有显著提高.
Many factors will affect the coding time in the process of H. 264/AVC video coding, such as inter/intra mode decision, rate distortion optimize （ RDO ） and so on. The reference program from JVT （ Joint Video Team） used the full search algorithm for intra prediction which is an algorithm with high complexity. To solve this problem, a new fast intra prediction algorithm based on Radon transform is proposed in this paper. Experiment results show that the proposed fast algorithm can achieve remarkable computation reduction while maintaining similar PSNR and bit rate performance.
出处
《小型微型计算机系统》
CSCD
北大核心
2010年第10期2101-2104,共4页
Journal of Chinese Computer Systems
基金
教育部科学技术研究重点项目(208012)资助
