We summarized common video server architecture , analyzed the performance requirements , data placement and admission control problem , etc . , of large - scale video storage server . we propose a new data placement scheme and its admission control algorithm based on parallel disk arrays , which can satisfy user ' s multi - qos requirements 就大规模视频服务器的存储体系结构、性能指标要求、数据布局和准入控制等问题进行了分析，提出了基于并行磁盘阵列、可满足用户多qos要求的、大规模视频服务器存储体系结构及调度算法。
In this paper , compared with the old monitor system , combined with the development of the new video and communication technology , video servers is brought forward as the new scenario that based on pc and ip multicast and the application of ip multicast on net - video transmitting system is studied emphatically 本文通过分析原有监控系统的不足和结合现代视频技术、通信技术发展趋势，提出和设计了基于pc机和ip组播通信方式的视频服务器方案，其中着重研究了ip组播技术在网络视频传输中的应用。
The innovations are in the following aspects : apply jsp to create the active web pages ; adopt jsp and jdbc as database connection technology ; divide the web sever and video server logically ; use both rtsp protocol and http protocol to access the url the video file . the most important innovation is that i develop a player for client , and at last succeed in embedding the realplayer in the web page 主要体现在以下方面：本系统采用jsp技术动态生成系统网页，采用tomcat作为网页发布环境；采用jsp和jdbc数据库接口技术；将视频服务器和wb服务器在逻辑上完全分开；采用甜卜施v r数据库管理视频文件时存储文件路径而不是文件本身，在运用协议传输视频文件时采用将rtsp协议和传统的http协议相结合的方式。
After i deeply and thoroughly analyzed and compared the designing principle , designing thought , implementing method and excellences and defects of current common vod system , i bring up an idea that a designing plan which is concerned of a distributed vod system generally adapted to various large - scaled and medium - scaled network . this system is composed of managing server , distributed video server and client 本文作者在深入细致地分析、比较了当前常见的视频点播系统的设计原理、设计思路、实现方法及其性能优缺点后，提出了一种广泛适用于各种大中型网络环境的分布式视频点播系统的设计方案，该系统由管理服务器、分布式视频服务器和客户端组成。
The present main product includes : has the wirelesshome use commercial security alarm system 、 has the wireless invasioninfrared microwave detector 、 the infrared correlation and theelectronic stockade border protection product 、 the smog fuel gasdetector 、 the security fitting ( gate magnetism 、 switch , button 、 warning light and so on ) 、 the infrared camera , a body camera 、 thenetwork camera 、 the network video frequency server 、 the hard diskvideorecorder and so on peacefully guards against the product 目前的主要产品有：有无线家用商用防盗报警系统、有无线入侵红外微波探测器、红外对射及电子栅栏周界防护产品、烟雾燃气探测器、防盗配件（门磁、开关、按钮、警灯等） 、红外摄像机、一体摄像机、网络摄像机、网络视频服务器、硬盘录像机等安防产品。
