【作者】 马文强；

【导师】 章专；

【作者基本信息】 浙江大学 ， 电路与系统， 2011， 硕士

【摘要】 随着多媒体技术和网络传输技术的飞速发展,实时视频传输技术在工业监控、环境监测、安防监控等多个领域的应用日趋广泛。传统的有线视频传输系统在矿井、荒芜地区等环境下存在着布线困难等问题；对于临时需要进行视频传输的场合,不能灵活而快速地搭建有线视频传输系统。因此,有必要开发组网灵活的无线视频传输系统。本文设计并实现了一套双路视频无线传输系统,它采用了H.264视频编解码技术,这在保证视频质量的前提下可有效减少网络带宽需求；采用了自组网的无线传输方式,可灵活搭建视频传输系统,并减少系统综合成本。文章首先分析了无线视频传输系统的特点,在总结已有视频传输系统优缺点及国内外研究现状的基础上,根据无线视频传输系统的设计要求,设计了系统的总体框架。然后,针对H.264视频编解码实现较复杂的特点和无线视频传输系统的功能需求,采用基于S3C6410的硬件平台作为主控模块,选择USB摄像头作为视频采集模块,使用无线网卡作为无线传输模块,完成了系统节点的硬件设计。在完成了节点的底层软件设计后,针对采集节点、中继节点和接收节点的不同功能要求,开发了相应的应用层程序。通过上述软硬件的开发,实现了三种节点的各项功能,从而实现了双路视频经过无线自组网络进行传输的系统。通过实验验证表明系统能够很好地实现双路视频传输功能。更多还原

【Abstract】 As the rapid development of the multimedia technology and network transmission technology, real-time video transmission is increasingly used in industrial monitoring, environment monitoring, security monitoring and other fields. In complex environments, such as mines and remote areas, there are issues such as wiring problems in the traditional wired video system. It is hard to build the wired video system flexibility and quickly in situations, which need to transmit video temporarily. Therefore, it is necessary to develop a flexible wireless video transmission system.In this paper, a dual video wireless transmission system is designed and implemented. With H.264 video codec technology, it is effective to reduce the demand for network bandwidth in the premise of ensuring video quality. With Ad-Hoc networks, it can build a flexible video transmission system and reduce system integration costs.Based on analyzing the characteristics of wireless video transmission system, summarizing the research status, advantages and disadvantages of current video transmission system and the design requirements of the wireless video transmission system, the general framework of the system is designed. With S3C6410 based hardware platform as the main control module, USB camera as video capture module and wireless network card as wireless transmission module, the hardware of system nodes is designed to meet the requirements of H.264 video codec and system functions. For the different functional requirements of acquisition nodes, repeater nodes and receiving nodes, the corresponding application layer program is developed after completing the design of bottom software. Through the above development of software and hardware, the various functions of three types of nodes are achieved, and the dual video wireless transmission system is also achieved. Verified by experiments, the system can excellently achieve the dual video transmission functions.更多还原