IPTV媒体分发技术之一——代理缓存  

One of IPTV Media Delivery Techniques—Proxy Caching

作　　者：聂秀英[1] 

机构地区：[1]信息产业部电信研究院通信标准研究所,北京100083

出　　处：《电信工程技术与标准化》2006年第3期1-5,共5页Telecom Engineering Technics and Standardization

摘　　要：媒体分发技术在保证IPTV业务的服务质量上具有相当关键的作用。CDN(内容分发网络)技术在Web业务上得到了较为广泛的应用,但与传统的Web业务不同,IPTV需要分发的内容是数据量相当大的视频数据,采用传统的CDN技术不能完全满足IPTV业务的需要。本文介绍应用于IPTV视频流分发的代理缓存技术。Media delivery technique plays a key role to ensure the QoS of IPTV services. CDN （Content Delivery Network） technique is widely used in Web services, but IPTV services are different from traditional Web services as the contents delivered within IPTV services contain quite huge amount of video data. It can not meet the requirements of IPTV services using traditional CDN technique, This article introduces the proxy caching technique applied to IPTV video streams delivering.

关 键 词：IPTV媒体流分发 分层编码 分段缓存 

分 类 号：TN943[电子电信—信号与信息处理]