In this paper,we introduce the theory and the structure of NVOD system based on CATV,and mainly talk about the way to create and receive SI information about NVOD service through an example.

• 介绍基于有线数字电视的NVOD系统的原理及系统构成,通过一个实例重点介绍NVOD相关的SI信息的生成和接收方法。