基于率失真优化的H.264参考帧选择算法  

A novel reference frame selection algorithm for H.264 based on rate-distortion optimization

作　　者：唐浩漾[1] 王曙光[1] 赵洪钢[2] 

机构地区：[1]西安邮电大学自动化学院,陕西西安710121 [2]西安通信学院信息服务系,陕西西安710106

出　　处：《西安邮电大学学报》2014年第4期31-35,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金资助项目(60902052);陕西省自然科学基金资助项目(2012JM8022;2011JM8003);陕西省教育厅自然科学基金资助项目(12JK0540)

摘　　要：为了有效抑制 H．264/AVC压缩视频流的传输错误扩散，提出一种基于率失真优化的 H．264参考帧选择算法。该算法针对 H ．264/AVC中的多种预测模式，在像素级准确估计了差错环境下的视频传输失真，并将该失真模型与率失真优化准则结合，在率失真框架内选择最合适的参考帧，使解码段的失真度达到最小。实验结果表明，改进算法相比传统的预测编码方法PSNR值大约提高了1～2dB，能有效改善 H．264视频传输的抗差错性能。To improve the error resilient performance of video data over error-prone channel,a novel reference frame selection algorithm for H.264 based on rate-distortion optimization is pro-posed in this paper.Combined with various modes prediction of H.264/AVC,a recursive optimal per-pixel estimate algorithm is used to estimate the end-to-end reconstructed distortion.Then based on the distortion estimation model and the rate-distortion optimization rule,the best suit-able reference frame is chosen to minimize the decoder distortion.Simulation results indicate that the proposed algorithm can increase about 1~2 dB performance gains and get better error resili-ent performance comparing with traditional prediction coding algorithms.

关 键 词：视频编码 参考帧选择 率失真优化 端到端失真 

分 类 号：TN919[电子电信—通信与信息系统]