文档介绍：题目: 数字楼宇对讲系统研究与设计

院(系) 信息科学与工程学院
专业电子信息工程
届别 2012级
学号 0815212015
姓名温云飞
指导老师李国刚副教授

华侨大学教务处印制
2012年6 月 1 日
摘要
随着信息时代的发展和智能小区的普及,现代化住宅小区用户对于安全防范的要求也逐步提高。楼宇可视化对讲系统作为重要的安全防范措施之一,可以通过记录访客影像和语音来有效地提高小区的安防能力。随着嵌入式技术的广泛应用,数字楼宇可视对讲的系统设计更倾向成本低、稳定性好、清晰度高的方向发展。
嵌入式Linux具有天生秉承的优势,是时下各企业和科研机构的研究热门。由Samsung公司推出的S3C2440处理器不仅价格便宜,同时功耗极低,性能极高。本次设计将在以S3C2440处理器为核心的天嵌公司TQ2440开发板上基于嵌入式Linux操作系统完成,通过应用软件程序进行视频采集、传输及视频客户端播放来实现可视对讲中的视频功能。
根据设计的需求,首先介绍了数字楼宇对讲系统的研究现状、发展动态以及发展趋势;然后详细介绍了系统设计所涉及到的几个关键技术,包括视频采集、UDP网络传输、数据接收显示等几个主要模块;之后是系统平台的搭建与软件设计测试结果;最后,本文对所完成的内容进行了总结,并提出了系统的不足及该进方案。

关键词:嵌入式;S3C2440;Linux;可视对讲;UDP网络传输
ABSTRACT
With the development of the information times and the popularization of intelligent building, the residents of modern housing area have a raising demand for security. The visual system is one of the security precautionary measure, it can effectively increase the ability of the area’s security by recording visitor’s face and voice. With the embedded techniques used extensive, the design of digital building visual system tends to be more low-cost, more stable and higher sharpness.
Embedded Linux has born superiority; it’s a hot research subject in many enterprises and research institutions. S3C2440 CPU of pany is not only cheap, but also low power consumption and high performance. This design will pleted on TQ2440 demoboard based on embedded Linux operating system. It will realize visual talk-back by application program, which can collect video and voice, compress them, transmit them and in the end play the video on client.
According to the design demand, firstly, the papers introduce the digital building visual system’s actuality study and developments’ trends. Next, papers introduce some key technique according video collecting, munication, network transmission and data receiving. And then it introduces the debugging on system platform, software design and test result, kernel porting and U-boot programming. Finally the plished tar