【作者】 倪坤；

【导师】 李思敏；

【作者基本信息】 桂林电子科技大学 ， 检测技术与自动化装置， 2007， 硕士

【摘要】 随着科技的进步和人们生活水平的提高,可视对讲系统渐渐成为住宅小区的标准要求,其核心功能是语音和图像的传输。现有的可视对讲系统一般采用电话线传输模拟图像信号,安装布线比较麻烦,传输距离远信号还会有衰减。因此论文讨论了如何构建嵌入式网络可视对讲系统,以及利用住宅小区局域网来传输语音和图像,以解决传统可视对讲系统中存在的问题,从而实现整个系统的数字化。嵌入式系统具有体积小,可以内嵌到设备内等诸多优点。随着相关技术的进步,出现了越来越多高性能的嵌入式处理器。在这些嵌入式处理器上已经实现了网络可视对讲应用,但是高成本成为限制其市场应用的主要因素。因此论文主要研究如何合理的设计系统,在低端的嵌入式处理器上实现网络可视对讲功能。通过合理的软硬件设计,本文在一个ARM7微控制器和一个ARM9微处理器上分别实现了网络可视对讲的功能,并测试了其性能,验证了在低端嵌入式处理器上实现视频应用的可行性,为基于网络的楼宇可视对讲系统产品的设计提供了参考。随着蓝牙无线通信技术的发展,蓝牙无线通信的带宽逐渐增大,论文最后还研究了蓝牙无线技术在可视对讲系统中的应用,提出了一个可行的无线可视对讲系统方案。更多还原

【Abstract】 Video phone whose core function is the transmission of speech and video becomes the standard need gradually along with the advancements of technology and the promotion of people’s living standard. Existing video phone generally transmits analog video signal using phone line, installation and connection is complex, distance also will weaken the intensity of the analog video signal. So this article discusses the design of embedded internet video phone system which transmits speech and video using local area network of living district in order to solve the problem of traditonal system and realize that the whole system is digital.Embedded system is so small that it can be embedded into the equipment. More and more high performance embedded processors have been produced along with the advancements of reference technology. Internet video phone application has been realized on these embedded processors, but high costing is the major factor which limits their market. So the emphasis of the article is how to design the system reasonably in order to realize internet video phone application on low end embedded processors. The article realized the function of internet video phone on an ARM7 micro controller and an ARM9 micro processor respectively through reasonable hardware and software design, and tested their performance, verified the feasibility of realizing video application on low end embedded processors, provided reference design for the video phone product which is based on the technology of internet.The bandwidth of Bluetooth wireless communication increases gradually along with the advancements of Bluetooth technology. The article discussed the use of Bluetooth technology in video phone system in the end and designed a feasible plan.更多还原