基于嵌入式系统的视频采集与无线传输系统的设计与实现

发布时间：2018-01-08 23:30

本文关键词：基于嵌入式系统的视频采集与无线传输系统的设计与实现　出处：《宁夏大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着社会的不断发展进步,人们对视频监控的需求越来越多,视频监控已经渗透到日常生活、工业生产的各个方面。因为视频监控可以清晰地提供给使用者客观的视觉材料,从而受到人们的广泛关注。本文回顾了视频监控系统的发展历程,介绍了国内外视频监控技术的研究现状及未来的发展方向。根据本课题的研究目标,对系统功能进行需求分析,提出了几套基于嵌入式处理器的视频监控方案,对这几套方案的特点及优缺点进行综合分析和比较,最终确定了一套最优方案：基于ARM11微处理器的B/S模式的视频采集与无线传输方案。本方案采用高性能、低功耗的ARM11微处理器作为处理核心,配以功能强大的嵌入式Linux操作系统,使用支持Linux-UVC协议标准的USB摄像头作为图像采集设备,配置并移植开源软件mjpg-streamer视频服务器,实现图像的获取、处理,并将处理后的图像传输成MJPEG格式的流媒体,通过无线网络发送到用户平台计算机。在用户平台,使用者通过网络浏览器便可以观看到视频画面。本文对该系统的具体软硬件进行分析和优缺点比较,确定了硬件平台和软件平台的构成。之后介绍了系统的整体设计,阐述了系统的硬件设计和软件设计。详述了交叉开发环境和嵌入式开发平台的搭建过程。然后介绍mjpg-streamer视频服务器及其工作流程,详细分析了基于V4L2应用程序接口的视频图像采集技术、基于JPEG算法的图像压缩技术、基于TCP/IP协议族和套接字编程的网络通信技术。最后,配置并移植mjpg-streamer视频服务器到嵌入式开发平台,最终建立一个视频采集与无线传输实验平台。通过实验测试得到结论：本系统能够实现视频采集与无线传输功能,使用者在Windows XP平台和Linux平台都可以通过网络浏览器观看到视频画面,实现了视频采集与无线传输系统的预期效果。
[Abstract]:With the continuous development and progress of society, people need more and more video surveillance, video surveillance has infiltrated into daily life. All aspects of industrial production. Because video surveillance can clearly provide users with objective visual materials, it has attracted wide attention. This paper reviews the development of video surveillance system, introduces the research status and future development direction of video surveillance technology at home and abroad. According to the research objectives of this topic, the requirements of the system functions are analyzed. Several video surveillance schemes based on embedded processor are put forward, and the characteristics, advantages and disadvantages of these schemes are analyzed and compared synthetically. Finally, a set of optimal scheme: video capture and wireless transmission scheme based on B / S mode based on ARM11 microprocessor is determined. This scheme adopts high performance. Low-power ARM11 microprocessor as the processing core, with a powerful embedded Linux operating system. Using the USB camera which supports the Linux-UVC protocol standard as the image acquisition device, the open source software mjpg-streamer video server is configured and transplanted to achieve image acquisition. The processed image is transmitted to the streaming media in MJPEG format and sent to the computer of the user platform through the wireless network. Users can view video images through a web browser. In this paper, the hardware and software of the system are analyzed and the advantages and disadvantages are compared, the hardware platform and the software platform are determined. After that, the overall design of the system is introduced. The hardware design and software design of the system are described. The process of building cross-development environment and embedded development platform is described in detail. Then the mjpg-streamer video server and its workflow are introduced. The video image acquisition technology based on V4L2 application program interface and the image compression technology based on JPEG algorithm are analyzed in detail. Network communication technology based on TCP/IP protocol family and socket programming. Finally, configure and transplant mjpg-streamer video server to embedded development platform. Finally, a video acquisition and wireless transmission experimental platform is established. The experimental results show that the system can achieve video capture and wireless transmission. The users can view the video picture through the web browser on the Windows XP platform and the Linux platform, and realize the expected effect of the video capture and wireless transmission system.
【学位授予单位】：宁夏大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.6

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