专用可移动无线高清视频实时传输系统设计与实现

发布时间：2018-01-01 22:11

本文关键词：专用可移动无线高清视频实时传输系统设计与实现　出处：《华东师范大学》2017年硕士论文　论文类型：学位论文

【摘要】：身处于信息时代,视频通信已经成为一种司空见惯的沟通手段。目前主流的视频传输方式主要基于公共网络,较适用于家庭或办公情境,该方式通过多年的技术迭代已发展得非常成熟。而在武警安防领域内,视频传输无法再依赖于公共网络,但目前专用的无线视频传输技术发展缓慢,其在视频质量、传输距离、设备灵活性等方面仍有很大的提升空间。应国内某知名安防监控企业需求,作者设计了一套适用于武警安防领域的专用可移动无线高清视频实时传输系统,该系统可被应用于应急救援、城市运转巡查、城市安全巡检以及军事侦察等方面,具有很强的实用性及社会意义。根据合作方需求,作者提出了以视频编解码芯片、DDR3高速存储器、FPGA、MCU以及集成RF收发芯片为主的系统方案,并独立完成了整个系统的原理图设计以及8层PCB设计,解决了高密度布线、信号隔离以及高速电路(最高传输速率达1066Mbps)信号完整性等一系列工程问题。结合对各可编程器件的软件设计,实现了 1080p高清视频H.264编解码、MIMO-OFDM基带信号处理以及2×2射频信号收发。配合摄像头及显示设备,作者搭建了系统的发射端与接收端,并进行了系统测试。测试结果表明,本系统可将搭载在可移动平台上的摄像头拍摄下的高清视频通过无线通信进行远距离传输,并在接收端进行实时显示。与现有技术相比,本系统具有便携、视频质量高、传输距离远、接口灵活等特点,对今后无线视频传输在武警安防领域内的发展起到了一定的借鉴作用。
[Abstract]:In the information age, video communication has become a common means of communication. At present, the mainstream mode of video transmission is mainly based on public networks, more suitable for home or office situations. In the field of armed police security, video transmission can no longer rely on public networks, but the current wireless video transmission technology is slow. Its video quality, transmission distance, equipment flexibility and other aspects still have a lot of room for improvement. The author has designed a special mobile high definition video transmission system which can be used in emergency rescue and city operation inspection. City security inspection and military reconnaissance have strong practicability and social significance. According to the requirements of the partner, the author proposes a video codec chip named DDR3 high speed memory FPGA. MCU and integrated RF transceiver chip mainly system solution, and independently completed the whole system schematic design and 8-layer PCB design, to solve the high-density wiring. A series of engineering problems, such as signal isolation and signal integrity of high speed circuits (up to 1066 Mbpss), are combined with the software design of various programmable devices. The 1080p high-definition video H.264 codec and MIMO-OFDM baseband signal processing, 2 脳 2 RF signal transceiver, camera and display equipment are realized. The author builds the transmitter and receiver of the system and tests the system. The test results show that. The system can transmit the high-definition video captured by the camera on the mobile platform through wireless communication, and display it in real time at the receiving end. Compared with the existing technology, the system is portable. The characteristics of high video quality, long transmission distance, flexible interface and so on, have played a certain reference role in the future development of wireless video transmission in the field of armed police security.
【学位授予单位】：华东师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN919.8

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