VOD（Video On Demand）即视频点播技术的简称,也称为交互式电视点播系统。是随着计算机技术和网络通讯技术的发展，综合了计算机技术、通讯技术、电视技术而迅速新兴的一门综合性技术。它利用了网络和视频技术的优势，彻底改变了过去收看节目的被动方式，实现了节目的按需收看和任意播放，集动态影视图像、静态图片、声音、文字等信息为一体，为用户提供实时、交互、按需点播服务的系统。
本文主要阐述了如何利用VC设计实现客户端和服务器，以及使用Socket和Directshow技术来实现它们之间的通信，系统基本达到了预期的设计要求。文中还重点介绍了该系统的各个重要模块及FILTER的设计和实现，并对系统的优缺点进行了总结，提出了对未来的展望。
关键词：视频点播技术，SOCKET，DIRECTSHOW
ABSTRACT
VOD (VIDEO ON DEMAND) Video-on-Demand technology that is short also known as interactive TV-on-Demand System,With computer technology and network communications technology,integrated computer technology, communications technology, TV technology and the rapidly emerging an integrated technical. It has made use of network and video technology advantages and completely changed in the past to watch them in a passive way, Implementation of programs on-demand viewing and arbitrary broadcast video images collected dynamic and static images, sounds, text and other information as one. to provide users with real-time, interactive, on-demand services-on-demand system.
This article describes how to use Design VC client and the server. and the use of Socket and DIRECTSHOW technology to meet the communication between them, basic system achieved the desired design requirements. The article also focuses on the system's various modules and FILTER important in the design and realization The system's advantages and disadvantages of summing up, a vision for the future.
