视频服务器功能和结构的分析

An analysis to the functions and structure of video server

视频服务器是交互式电视中不可缺少的组成部分，它的结构设计与它的性能价格比密切相关。笔者首先介绍了视频服务器的功能，然后给出了它的指令系统，最后介绍了三种视频服务器的实现方法，并且对它们进行了比较。

Video server is one of the indispensable elements in interactive television.Its structural design is closely related to the cost effectiveness.This article introduces the functions of video sever and then gives its instruction system.Finally,three methods for its implementation are given and compared with each other.