有线数字电视前端系统的同步研究和实现

随着有线电视数字化的全面推行，时钟同步问题成为前端播出的一项新的课题和挑战。本文对数字电视前端各种同步方式进行了研究和比较，阐述各自特点和局限性，建设了一套高精度、安全可靠、可扩展的时钟同步系统。

Research and Realization of Synchronization of Cable DTV Head-End System

In construction of DTV head-end system, design and building of synchronous clock system are very critical sections. In this paper, research and comparison of DTV head-end synchronous modes are introduced, and a BITS synchronous system which includes communication clock synchronization and computer network time synchronization is advanced. This system not only successfully solves various kinds of business questions caused by asynchronism between different DTV head-end systems, but also brings great convenien...