基于ARM9的无线视频传输系统的研究

发布时间：2018-06-18 16:15

本文选题：S3C2440 + 无线传输　；参考：《中北大学》2014年硕士论文

【摘要】：无线视频传输系统广泛应用于安防、视频会议及多媒体生活等领域，其主要特点是信号数据量大、实时性强、灵活方便，已成为当前移动通信技术的重要产业。常规的视频传输技术存在视频图像质量差，传输容量小，传输速度慢等缺点。本文以ARM9作为核心控制器，对基于ARM9的无线视频传输系统进行研究。论文主要工作如下： 1.设计了基于ARM9的无线视频传输系统的硬件电路，该硬件系统的主要功能是完成视频图像采集和传输，主要包括：S3C2440核心控制电路、电源电路、LCD显示电路、USB摄像头接口电路和GPRS通信模块接口电路。 2.进行了无线视频传输系统的软件设计，完成了LINUX操作系统的内核移植，根文件系统制作和USB视频采集模块、GPRS通信模块、LCD触摸屏设备等硬件模块的驱动。 3.针对传统图像压缩算法存在严重失真的问题，，对H.264图像压缩算法进行了研究，该算法利用熵编码技术解决了图像压缩慢和失真严重的问题，实现了图像的高清传输。本论文以嵌入式应用系统为构架，在以ARM9系列S3C2440为处理器的嵌入式硬件系统平台上开发和移植了无线视频传输系统。该系统经过测试可以实现图像的高清晰、快速以及近无损传输。并且该系统具有良好移植性，亦可用于同类产品中。
[Abstract]:Wireless video transmission system is widely used in the field of security, video conference and multimedia life. The main characteristics of wireless video transmission system are the large amount of signal data, real-time, flexibility and convenience, which has become an important industry of current mobile communication technology. The conventional video transmission technology has the disadvantages of poor video image quality, low transmission capacity and slow transmission speed. In this paper, ARM9 is used as the core controller to study the wireless video transmission system based on ARM9. The main work of this paper is as follows: 1. The hardware circuit of the wireless video transmission system based on ARM9 is designed. The main function of the hardware system is to complete the video image acquisition and transmission, mainly including the core control circuit of: S3C2440. Power supply circuit LCD display circuit USB camera interface circuit and GPRS communication module interface circuit. 2. The software design of wireless video transmission system is carried out. The kernel transplantation of Linux operating system, the manufacture of root file system and the driver of USB video acquisition module, GPRS communication module and LCD touch screen device are completed. 3. In order to solve the problem of serious distortion in traditional image compression algorithm, the H.264 image compression algorithm is studied. The entropy coding technique is used to solve the problem of slow image compression and serious distortion, and the high-definition image transmission is realized. In this paper, a wireless video transmission system is developed and transplanted on the embedded hardware platform with ARM9 series S3C2440 as the processor. After testing, the system can achieve high definition, fast and near-lossless transmission. And the system has good portability, can also be used in similar products.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8

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