IPTV视频传输质量问题分析  

Analysis on IPTV Video Transmission Quality

作　　者：张桂卿[1] 傅雪鹏[1] 佘方毅[1] 康建华[1] 

机构地区：[1]国家新闻出版广电总局广播科学研究院,北京100866

出　　处：《广播与电视技术》2014年第6期53-55,共3页Radio & TV Broadcast Engineering

摘　　要：本文从IPTV网的传输特性、传输协议、视频压缩编码结构等多方面分析了IPTV系统中影响视频质量的诸多因素,如丢包、延时、不同类型的帧、GOP长度对IPTV视频传输质量的影响。同时也分析了这些因素之间的相互关系及相互影响。从而得出,进行IPTV系统测量,除考虑丢包、延时等传输层的因素外,还应多角度全方位进行分析和测量。In the paper, factors affecting quality of video in IPTV are analyzed from transport characteristic, transport protocol, frame of video compress coding, etc. They are dropped packets, delay, I(B, P) frame and the length of GOP. The correlation and the interaction between those factors were also analyzed. The conclusion was drawn that we should analyze and measure IPTV from many facets besides packet loss and delay.

关 键 词：IPTV 视频质量 IP包 丢包 延时 帧结构 GOP长度 

分 类 号：TN94[电子电信—信号与信息处理]