基于HLS协议的流媒体直播系统的研究和改进  

Research and Improvement of Streaming Media Live System Based on HLS Protocol

作　　者：罗淑贞[1] 耿恒山[1] 徐祥男 孙豪赛 高艳[1] 李钦[1] 谢因 

机构地区：[1]河北工业大学计算机科学与软件学院,天津300401 [2]天津理工大学自动化学院,天津300384 [3]天津滨海新区环球网络电视有限公司,天津300202

出　　处：《郑州大学学报（工学版）》2014年第5期36-39,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(31100711)

摘　　要：对基于HTTP live streaming(简称HLS)协议的流媒体直播系统的工作原理以及结构进行了系统的介绍,利用网络数据分析仪来深入研究客户端与服务器的交互传输过程,剖析了这种技术应用于网络电视直播时所存在的视频流索引文件重复下载的冗余问题,在一定程度上造成了网络流量的浪费,降低了传输效率.针对这类问题提出了一种改善的方法——标志法,即在.m3u8文件中添加一个新标签,并通过计算推导和实验验证把改善前后的效果进行了定量分析和对比,实验结果表明该方法可有效降低流量浪费率,提高传输性能,具有较大的可行性.This paper systematically introduces the working principle and structure of streaming media living system based on HTTP live streaming protocol（also known as HLS）.It makes a deep research on interact transmission process between client and server with the network data analyzer and analyzes detailedly the redundancy problem of video index files being repeatedly downloaded when applying this technology in network television broadcast.But the current technology brings about the waste of network traffic and the reduction of transmission efficiency.In view of these problems,we put forward an improved mark-method technique which add a new tag in m3u8 file.A calculation was carried out to testify the method and it proved it can effectively reduce the waste of net flow rate,improve the transmission performance and have great feasibility.

关 键 词：HLS TV 冗余 视频流索引 标志法 

分 类 号：TP393.0[自动化与计算机技术—计算机应用技术]