【作者】 夏婷；

【导师】 黄秋元；

【作者基本信息】 武汉理工大学 ， 通信与信息系统， 2008， 硕士

【摘要】 随着计算机及网络技术的迅速发展,视频监控系统从最初的模拟监控系统发展到模拟数字混合系统,并步入第三代全面数字化系统。现在即将进入第四代视频网络安防监控时代。在我国,绝大多数的视频监控系统都不能互相联网,这使社会资源不能得到有效的利用。针对这种现状,研究与开发出的一套基于光纤网络的非压缩数字视频监控系统,包括视频图像的监控调度,跨省跨区域的视频信号、音频信号、报警信号等一系列监控信息的传输。本文对该系统进行了整体介绍,由于交换部分设计是方案设计的核心,故本文的重点是阐述交换节点上嵌入式文件系统平台和视频控制部分软件的设计与实现,这也是本人在课题设计中完成的主要工作。具体来说,本文主要的工作如下。(1)阐述了该视频监控系统的光纤组网模式、非压缩视频信号特点,以及系统的软硬件设计方案;(2)在交换节点上的嵌入式平台设计中,为了提高软件运行中对数据控制的有效性和实时性,针对本系统设计了一个嵌入式文件系统集群;(3)实现交换节点上视频控制部分在嵌入式平台的软件设计,其主要由七个模块组成。该视频控制软件主函数的设计通过对四类数据结构的轮询,将输入数据结构中的数据经过组合运算得到的结果存入到输出结构之中,然后等待整个系统的硬件驱动设备对视频输出结构中的输出信息进行统一处理,这样减少了视频切换运算程序执行的复杂度,提高了系统运行效率;(4)通过PC上的视频控制界面对交换节点的视频控制进程的测试过程,可以看到视频控制进程实现了只能启动一次进程的独占模式,从而避免输入输出错误。另外,界面下发键盘控制和配置数据测试时,从得到的打印信息可以看出该进程的可行性。通过测试使用,本课题研究实现的视频监控系统可以很大程度的以网络化的方式进行事件的发现及处理,可以很好的实现远程异地高清晰度视频数据的传输、切换及视频图像控制信号的同步传输,在安防行业中有很好的使用价值。更多还原

【Abstract】 With rapid developments of computer and network,the video monitoring system has experienced from the initial analog monitoring system to the analog-digital mix stage,and tends to the comprehensive digitization of third generation and the video monitoring system of fourth generation,namely,the monitoring system of the video network security & protection is coming.Now,the majority of video monitoring systems cannot form a network in our country.So it is not effectively used for the social resources.In view of this status quo,a set of video security monitoring system based on fiber networks is researched and developed,including video surveillance and management,a series of monitoring signal,image video,audio signals,alarm signals and so on,transmission of inter-provincial and cross-regional.This article roundly introduces it,and mainly analyzes the designs and realizations of video control software and embedded file system platform on the switching nodes,these are also my main researches.The main accomplished work in this paper as follows:(1)It describes the modes of fiber network,the characteristics of non-compress video signal and the designs of software and hardware about the video monitoring system.(2)In order to improve real-time and effective control for the data in designs of embedded switching system on switching nodes,I design a cluster of file systems for this platform of embedded system.(3)The software of video control on the embedded platform of switching node is designed and accomplished.It is mainly composed of seven modules.Its main function is that polling the four category data structures,computing the data of input data structures and save in the output data structures,then waiting the unified information processing through the whole hardware driver equipments.This can decrease the complexity of video switching operation procedures and improve the system efficiency. (4)Through interface of PC test the video control system of switching node, we can see the process of the video control has exclusive mode of startup only once for avoiding the mistakes of input and output.And we can know the feasibility of process through the print information by the test of keyboard commands and configuration data.Through the test and use of video monitoring system,it is proved that it can discover and handle cases based on network in a large degree,and can achieve good long-distance synchronous transmissions of high video clarity data,switching and control signals in the video images.So the system has a very good value in the industry of security & protection.更多还原