基于HTTP的动态自适应流技术综述  

Survey of Dynamic Adaptive Streaming over HTTP(DASH)

作　　者：朱晓晨[1] 沈苏彬[2] 

机构地区：[1]南京邮电大学物联网学院,南京210003 [2]南京邮电大学计算机学院,南京210003

出　　处：《系统仿真学报》2013年第11期2522-2527,2533,共7页Journal of System Simulation

基　　金：江苏省科技支撑计划项目(BE2009157)

摘　　要：基于HTTP的动态自适应流(DASH)技术,是一种新兴的、基于HTTP码率自适应的流媒体传送技术,可以在提供HTTP协议的网络中广泛采用。DASH标准主要包括媒体表示描述文件和段的技术规范,因为其充分利用现有HTTP基础设施、有效节省带宽,所以DASH标准正日益得到更多关注和研究。目前对DASH的研究还没有传统流媒体研究那样深入,当前和未来一段时间的研究热点主要集中在标准简本完善、码率自适应、编码格式、用户体验改善、应用部署等方面。Dynamic Adaptive Streaming over HTTP （DASH） is a rate-adaptive streaming media transmission technology. It could be applied in networks with HTTP protocol supporting. The DASH Standard consists of the technical specifications of MPD （Media Presentation Description） and Segment mainly. The standard makes full use of existing HTTP infrastructures and saves bandwidth effectively, which is drawing increasingly attentions. At present, the researches of DASH are not as deep as traditional streaming media transmission technologies. However, the issues of Standard revising, rate-adaptive algorithms, codec formats, user experiences improving and applications deploying are becoming research focuses from now on.

关 键 词：DASH 流媒体 HTTP 自适应流 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]