基于NetMagic的流媒体传输延时抖动均方差估计  

Streaming media transfer delay jitter MSE estimation based on NetMagic

作　　者：毛席龙[1] 程辉[1] 

机构地区：[1]国防科学技术大学计算机学院,湖南长沙410073

出　　处：《现代电子技术》2012年第5期80-82,共3页Modern Electronics Technique

基　　金：国家973计划资助项目(2009CB320503)

摘　　要：提出并实现了一个报文转发和控制平台NetMagic,截取报文的前64字节,加上本地时间戳信息,产生摘要报文,在外部控制主机上实现流媒体传输延时的抖动估计。在主机与平台之间实现了NMAC协议,利用以太网传输控制命令,简化了系统体系结构。测试结果表明,摘要报文既能反映流媒体传输延时的抖动特性,也能提供其他五元组分析功能。A forward and control platform is presented and completed,which is used to cut the first 64 bytes of the received packet,add the local timestamp to form a new Abstract packet,and estimate the transfer delay jitter of the streaming media on the external host computer.A NMAC protocol is implemented between the host and platform,it transfers the control commands over Ethernet packets and simplifies the system structure simultaneously.The test results show that the Abstract packets can carry the jitter characters of streaming media transfer delay and provide other five-tuple analysis functions.

关 键 词：流媒体 传输延时 均方差 时间戳 

分 类 号：TN919-34[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]