基于模糊控制的自适应播放算法  

Adaptive media playout algorithm based on fuzzy control

作　　者：严峻[1] 戴琼海[1] 

机构地区：[1]清华大学自动化系,北京100084

出　　处：《清华大学学报（自然科学版）》2008年第1期157-160,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60432030);国家杰出青年科学基金项目(60525111)

摘　　要：自适应媒体播放(AMP)技术是提高流媒体播放性能的一种有效方法。为了减轻传统的AM P由于播放速度突变而对播放质量带来的影响,提出一种基于模糊控制的自适应媒体播放算法。通过当前缓冲和播放速度的情况来动态调节播放速度,产生比较平稳变化的播放速度,同时保持缓冲在一定范围内变化。仿真结果表明:该算法能够在保持缓冲下溢概率和播放延迟基本不变的前提下,使播放速度变化幅值和变化增量减小到原有AM P算法的10%以下,该算法优于原有AMP算法。Adaptive media playout （AMP） is an effective algorithm to improve streaming media playout performance. Traditional AMP algorithm which focuses on buffer control causes huge speed variations. An AMP scheme was developed based on fuzzy control to reduce speed variations found in previous AMP systems and improve performance. The system dynamically exports speed variations based on the current buffer＇s status and the previous playout speed. The system ensures that the exported speed is smooth and the buffer is stable. Simulations indicate that the scheme significantly reduces the average speed variations below 10% of the original AMP algorithm.

关 键 词：多媒体通信 自适应播放 缓冲 模糊控制 

分 类 号：TN919.8[电子电信—通信与信息系统]