IP化实时制作系统在流接收端实现视频净切换方案分析  

Analysis for Frame-accurate Clean Video Switching Scheme Implemented at Stream Receiver in IP-based Live Production System

作　　者：陈德林[1] 王颖[1] 张定京[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》2016年第9期52-56,共5页Radio & TV Broadcast Engineering

基　　金：广播科学研究院基本科研业务费项目130016015000102经费资助

摘　　要：帧精确、净切换是专业视频制作系统的一项基本要求,传统基于SDI的实时制作系统P化后,业界对在哪个环节实现视频净切换提出了不同的实现方案。本文主要分析了在流接收端实现视频净切换方案的优缺点,并给出结论,尽管在切换交叠期存在着两倍带宽的缺点,但可以采用IT产业COTS交换机搭建系统,选择在流接收端实现视频净切换的总开销仍然小于使用专用交换机的方案。Frame-accurate clean video switching is a fundamental requirement for professional live production system. When the current SDI- based live production systems transfer to IP-based live production systems, there are some clean video switching schemes proposed by the industry. This paper mainly analyses the advantages and shortcomings for the scheme realized at the stream receiver, and gives a conclusion. Although incurring such a double bandwidth penalty, the total cost is lower than that of using specialized IP switch scheme.

关 键 词：SDI IP 视频净切换 

分 类 号：TN948.13[电子电信—信号与信息处理]