高清视频联网系统中一种新的丢包率分析方法  

Novel Method of Packet Loss Rate Analysis in HD Video Network Systems

作　　者：裴静[1] 郅晨[1] 

机构地区：[1]公安部第一研究所,北京100048

出　　处：《电视技术》2013年第23期150-154,共5页Video Engineering

基　　金：国家科技支撑计划项目(2012BAH21B00)

摘　　要：为了提高系统性能并最大限度降低算法实现复杂度,提出了一种新的高清视频联网系统中丢包率的更优近似分析方法,重点研究包长度对丢包率的影响。首先使用马尔科夫链模型估算数据包的误码率,进而得出数据包网络时延的概率分布,最后计算出基于包长度的丢包率的理论表达式。仿真结果表明,通过减小发包大小可以有效降低丢包率,同时基于包长度的丢包率的理论分析方法可以有效地运用到高清视频联网系统的分析研究中。In order to improve the system performance and reduce the algorithm complexity future, a new better approximate analysis method of packet loss rate is proposed in HD video network systems, focusing on the relation between the length of the packet and packet loss rate. First using Markov chain model to estimate bit error rate of video packet, then the probability distribution of network delay of video packet is also given, finally the theoretical expression of packet loss rate based on the length of the packet is calculated. Analysis and simulation demonstrate that analysis method of packet loss rate can be effectively applied to the research of HD video network systems.

关 键 词：误码率 丢包率 时延 马尔科夫链 

分 类 号：TN919.85[电子电信—通信与信息系统]