HTTP流化技术研究

Research on HTTP streaming

HTTP流化技术在Internet上应用越来越广泛,该技术适合Internet"尽力而为"的传输特点,有望取代RTP/RTSP流化.本文首先从传输速率和内容存储两个维度,分析了多媒体内容传输的四种类型;再进一步分析了媒体文件存储格式方案及其选择,以及客户端决策和服务器决策两种自适应流化模型.为了方便读者实时掌握该技术的发展现状,论文最后分析了HTTP流化技术的标准化情况.

HTTP streaming fits for the ＂best of effort＂ characteristic of Internet,and is developing as a mainstream for multimedia content delivery in Internet.This paper firstly gives a study on different types of multimedia content delivery from two different dimensions,i.e.transport rate modes and content storage format.The paper analyzes the different schemes of content storage format and its selection criteria,then studies two different models of adaptive streaming and their characteristics.To catch the state of art（SoA） of HTTP streaming,this paper finally summarizes the standardization status of HTTP streaming.