多媒体播放中的动态双门限自适应调整算法  

Dynamic Double Threshold Adaptive Adjusting Scheme in Multimedia Playout

作　　者：薛建生[1] 孙新[1] 宋宝燕[1] 任秀丽[1] 程子傲[1] 

机构地区：[1]辽宁大学信息学院,沈阳110036

出　　处：《小型微型计算机系统》2011年第12期2477-2480,共4页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60703068)资助;辽宁大学"211工程"三期建设项目-极端计算技术项目资助

摘　　要：针对无线网络存在的自相似特性会影响视频流的播放质量问题,提出了基于滑动窗口的接收端播放缓存调整算法,根据网络流量的变化,动态地调整双门限,并利用播放缓存的占用率来控制视频流的播放速度,平滑时延抖动.仿真实验证明,无论网络流量处于平稳状态还是处于突发状态,本文设计的算法都能够较好地保证视频流的连续播放,提高视频流的播放质量,为用户提供良好的视觉效果.The self-similarity of wireless networks may impact the play quality of video streaming.To solve the problem,a scheme about adjusting the playout buffer based on sliding window in the receiving end is developed,which can dynamically adjust the sliding double threshold according to the changes of the networks traffic,control the playout speed of video streaming on the basis of the buffer occupancy and smooth the delay jitter.Simulation experiments show that,whether the network traffic in a steady state or in a sudden varying state,the scheme designed in this paper can better ensure continuous video streaming,enhance the playout quality of video streaming and offer a good visual effect to clients.

关 键 词：自相似特性 滑动窗口 播放缓存 时延抖动 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]