VBR流式视频的最短路径率平滑传输算法  

The Shortest Path Rate Smoothing Transmission Algorithm of the VBR Streaming Videos

作　　者：谢建国[1] 姜灵敏[2] 陈松乔[2] 

机构地区：[1]湖南科学技术大学计算机科学与工程学院 [2]中南大学信息学院,长沙410000

出　　处：《计算机学报》2004年第3期357-364,共8页Chinese Journal of Computers

基　　金：国家自然科学基金 ( 6 992 82 0 1 );湖南省教育厅重点基金资助

摘　　要：预存储的变比特率 (VBR)压缩的视频网上流式传输 ,提供实时视频服务 .这种VBR视频呈现的突发性比特率变化特性使带宽预留和接纳控制等网络传输技术复杂化 .一个行之有效的解决办法是在传输前对这种VBR视频在满足一定限制条件下进行比特率无损平滑 .基于平面规划中的最短路径原理 ,针对存储的VBR压缩视频 ,文章提出了最短路径率平滑传输算法 ,并建立了一些相关概念 .算法的结果被证明能同时满足多项优化指标 :极小的峰值比特率、极大的谷值比特率及O(K)的时间复杂性 ,实验结果也显示算法是有效、可行的 .Variable bit rate (VBR) compressed video exhibits significant rate variability, this burstiness complicates the network bandwidth reserve, admission control and etc. To improve the utilization factor of the resource and simplify the management of network, it is very necessary that the VBR video streams be processed by smooth technology before transmitting them on network. Bases on the theory of the shortest path in the design of the plane layout, this paper pre sents an algorithm to smooth the transmitted rate of the stored VBR video, called the shortest path smoothing transmission algorithm. The algorithm can achieve the greatest possible reduction in rate variability, such as the minimum peak rate, the maximum bottom rate and O(K) ’s time complexity. The experimental results also show that algorithm is effective and efficient.

关 键 词：MPEG 视频压缩 VBR流式视频 最短路径率平滑传输算法 SPS算法 

分 类 号：TN919.81[电子电信—通信与信息系统]