融合通信系统中移动视频监控终端的设计与实现

发布时间：2018-06-15 11:52

本文选题：移动视频监控 + 融合通信　；参考：《中国科学院大学(中国科学院沈阳计算技术研究所)》2017年硕士论文

【摘要】：视频监控作为安防系统的重要组成部分,凭借着其直观、快捷以及可以提供丰富的音视频信息等优势,在公共安全、交通指挥、居民安防等领域得到了普遍应用。但近年来,传统的视频监控不能满足人们对监控移动化、实时化、智能化等多元化需求,移动通讯网络的迅速发展和Android智能移动设备的广泛普及使得移动视频监控成为了一个重要的研究方向。本文在深入研究流媒体传输技术、视频编解码技术和SIP协议的基础上,同时结合实验室融合通信项目对移动视频监控的需求,设计并实现了融合通信系统中的移动视频监控终端软件。论文首先介绍了融合通信系统,以及对移动视频监控的需求,阐述了移动视频监控的发展、前景和各种应用场景。然后介绍了移动视频监控终端软件开发时需要的关键技术,包括Android系统框架,移植FFmpeg库用到的JIN和Android NDK技术,流媒体传输技术,H.264视频解码标准,G.729AB音频编码标准以及实现视频监控端与采集端语音对讲的SIP通信协议。其次,对移动视频监控系统进行总体需求分析。接着做了总体架构设计,并对系统终端进行了详细设计。最后,重点介绍了移动音视频监控端、采集端的界面开发实现,以及两终端音视频接收、H.264解码器、音视频播放、语音对讲等核心功能模块的实现。本论文的创新点主要有:优化、裁剪FFmpeg库得到压缩率较高的编解码库;对视频数据传输过程中的丢包、乱序进行优化处理,避免监控画面的卡顿或者花屏;视频和音频数据分别采用独立服务器、通道处理传输,提升了监控画面的流畅度和语音通话质量,并且互不影响;移动监控端可以观看来自移动采集端和固定摄像头的多个通道的视频流;和融合通信结合,具有完善的语音对讲、后台管理、权限认证、消息推送等功能。在系统完成开发之后,就对其进行了全面测试,包括终端软件在手机,平板等Android设备上运行的稳定性,实时监控画面的清晰度和语音通话的质量以及4G网络条件下固定时间流量消耗情况。测试结果表明该终端软件运行正常,性能较好,达到了项目要求和科研目标。
[Abstract]:As an important part of the security system, video surveillance has been widely used in the fields of public safety, traffic command, residential security and so on, by virtue of its intuitive, fast and can provide rich audio and video information. But in recent years, traditional video surveillance can not meet the needs of mobile, real-time and intelligent surveillance. With the rapid development of mobile communication network and the wide popularity of Android intelligent mobile devices, mobile video surveillance has become an important research direction. Based on the in-depth study of streaming media transmission technology, video coding and decoding technology and SIP protocol, this paper combines the requirements of mobile video surveillance with the laboratory fusion communication project. The mobile video surveillance terminal software in the fusion communication system is designed and implemented. Firstly, the paper introduces the fusion communication system and the requirement of mobile video surveillance, and expounds the development, prospect and various application scenarios of mobile video surveillance. Then it introduces the key technologies needed in the development of mobile video surveillance terminal software, including Android system framework, JIN and Android NDK technology used in porting FFmpeg library. Streaming media transmission technology and H.264 video decoding standard G. 729AB audio coding standard and the implementation of video surveillance and acquisition end voice intercom SIP communication protocol. Secondly, the overall requirements of mobile video surveillance system are analyzed. Then the overall architecture is designed, and the system terminal is designed in detail. Finally, the development and implementation of mobile audio and video monitor and acquisition interface, as well as the realization of H.264 decoder, audio and video playback, voice intercom and so on are introduced. The innovations of this paper are as follows: optimizing, clipping FFmpeg library to get a high compression ratio codec library, optimizing the lost packet in the process of video data transmission, avoiding the monitor screen of the Carton or flower screen; The video and audio data are processed and transmitted by a separate server, which improves the fluency of the monitor picture and the quality of voice communication, and does not affect each other. The mobile monitoring terminal can watch the video stream from multiple channels of mobile acquisition terminal and fixed camera; combined with fusion communication, it has perfect functions of voice intercom, background management, authority authentication, message push and so on. After the development of the system, it was fully tested, including the stability of terminal software running on mobile phones, tablets and other Android devices. The definition of the picture, the quality of voice calls and the consumption of fixed time flow in 4G network are monitored in real time. The test results show that the terminal software works well and achieves the project requirements and scientific research objectives.
【学位授予单位】：中国科学院大学(中国科学院沈阳计算技术研究所)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN948.6

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