基于H.264的嵌入式视频通信系统的设计与实现

发布时间：2018-04-28 14:32

本文选题：嵌入式 + H.264　；参考：《武汉科技大学》2012年硕士论文

【摘要】：随着嵌入式开发技术、计算机网络技术和多媒体技术的不断发展与完善，这些技术越来越广泛的应用到电力行业，对输电设备进行全方位视频监控已经越来越可行。由于传统的有线网和无线网传输带宽有限，严重阻碍了视频的实时传输，为了在有限的带宽下流畅的传输高质量视频，ITU-T和ISO/IEC共同制订出新一代视频图像压缩编码标准H.264/AVC。与之前的压缩编码标准相比，H.264极大的提高了视频压缩比，但代价是增加了编码算法的复杂度。近些年，随着微处理器的各项性能不断地提高，在嵌入式系统上实现基于H.264压缩的视频通信越来越变得简易可行。嵌入式技术与新一代的视频压缩技术H.264相结合必将成为智能电网在视频通信领域的发展趋势。基于此，本文以三星公司推出的S3C2440微处理器为核心，结合嵌入式Linux系统以及新一代的视频压缩编码标准H.264，设计并实现了一个嵌入式H.264视频通信系统。通过对嵌入式、数字图像处理等技术的研究，提出了基于mini2440开发平台的视频通信系统的设计方案。论文的主要工作从以下几个方面展开：一是针对系统需要用到的硬件资源，定制了一套嵌入式Linux开发平台；二是分析了H.264主要功能模块和一些关键的编码技术；三是编写了该视频采集与传输系统的应用程序，，结合T264源码，完成了视频采集并压缩为H.264/AVC格式的视频数据的功能，实现了视频采集、压缩系统的软件设计，并利用UDP协议完成了压缩视频流的发送。测试结果表明，在平缓场景下，本系统具有图像压缩率高、质量好的优点，在mini2440开发板上视频延迟时间小，能够实现对输电设备的远程监测。该系统结构简单，性能稳定可靠，对输电设备视频监测的研究具有一定的参考价值。
[Abstract]:With the development and perfection of embedded development technology, computer network technology and multimedia technology, these technologies are more and more widely used in the power industry. Due to the limited transmission bandwidth of traditional wired and wireless networks, the real-time video transmission is seriously hindered. In order to transmit high-quality video smoothly with limited bandwidth, a new generation video compression coding standard H.264 / AVC has been developed by ITU-T and ISO/IEC. Compared with the previous compression coding standard, H.264 greatly improves the video compression ratio, but the cost is to increase the complexity of the coding algorithm. In recent years, with the improvement of microprocessor performance, video communication based on H.264 compression becomes more and more simple and feasible in embedded system. The combination of embedded technology and new generation video compression technology H.264 will become the development trend of smart grid in the field of video communication. Based on this, this paper designs and implements an embedded H.264 video communication system based on the S3C2440 microprocessor developed by Samsung, combined with the embedded Linux system and the new video compression coding standard H.264. Based on the research of embedded, digital image processing and other technologies, the design scheme of video communication system based on mini2440 development platform is put forward. The main work of this paper is as follows: firstly, a set of embedded Linux development platform is customized for the hardware resources needed by the system; second, the main function modules and some key coding technologies of H.264 are analyzed. Thirdly, the application program of the video acquisition and transmission system is written, and the function of video capture and compression into H.264/AVC format is completed with T264 source code, and the software design of video acquisition and compression system is realized. The transmission of compressed video stream is accomplished by using UDP protocol. The test results show that the system has the advantages of high image compression ratio and good quality. The video delay time on the mini2440 development board is small and the remote monitoring of transmission equipment can be realized. The system is simple in structure, stable and reliable in performance, and has a certain reference value for the research of transmission equipment video monitoring.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TN919.8;TP368.1

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