IP网中多媒体表现质量控制的算法研究  

Research on Algorithms for Controlling the Multimedia Quality of Presentation(QoP)over IP Network

作　　者：侯亚荣[1] 熊璋[1] 蒲菊华[1] 

机构地区：[1]北京航空航天大学计算机学院,北京100083

出　　处：《计算机工程与应用》2003年第33期5-7,共3页Computer Engineering and Applications

基　　金：国家航天科技创新基金资助项目

摘　　要：提出在目前IP网络设备及技术基础上,一种在通信子网外优化多媒体表现质量的源端最小延迟表现算法。给出并证明了分布式多媒体应用同步表现最优化定理,进而提出最小聚类延迟表现算法作为源端最小延迟表现控制算法的改进。与古典列表调度算法比较得出,上述两种算法能实现优化的分布式多媒体同步表现,同时在目的端缓冲区需求、溢出可能性等方面具有更优的性能。上述算法与底层通信机制无关,未来具有广阔的发展及应用前景。The MDPA( mi nimal delay presentation algorithm)performed out of the communication subnet i s brought forward to guarantee that every synchronization interval unit(SIU)a rrives at the destination buffer as near to the present time as possible.Then a theorem about the optimization of multimedia synchronization presentation is put forward and demonstrated.On the basis of the optimization theorem,an imp roved algorithm named MCDPA(minimal cluster delay presentation algorithm)is pr esented.Theoretical analysis shows that the essential buffer capacity for dest ination of these two algorithms is fewer than that of the classical list sched uling algorithm and the overflow probability of the SIU's caused by the two alg orithms is fewer than that of the classical list scheduling algorithm.

关 键 词：IP网 分布式多媒体系统 多媒体同步 服务质量 表现质量 

分 类 号：TP37[自动化与计算机技术—计算机系统结构] TP301.6[自动化与计算机技术—计算机科学与技术]