构建IP和SDI混合架构下的播出时钟系统

Broadcasting Clock System Based on Mixed SDI and IP Network

广东广播电视台新播出中心搭建了IP和SDI混合架构下的播出系统,原时钟系统已经不能满足需求,需要设计和搭建新时钟系统。本文介绍新系统应用的GPS、NTP、PTP的授时原理,分析当前时钟系统的架构、原理和隐患以及新时钟系统的架构和特点。

Mix SDI and IP network based broadcasting center is built in Guangdong Radio and Television Station.Due to the original system aging,and in order to meet the needs of the new system,we need to design and build a new broadcasting clock system.This paper describes the timing principle of three kinds of clock synchronization technique,GPS,NTP and PTP.It analyses system architecture,the timing principle and the problems of the existing clock system,and finally introduce the architecture and characteristics of the new clock system.