移动视频监控关键技术及应用系统研究

发布时间：2018-09-08 20:27

【摘要】：随着移动终端技术和通信技术的发展,移动视频进入一个新的发展阶段,与之相应的应用移动流媒体、视频压缩及信息流化、带宽自适应传输等技术也不断走向成熟。但在实际应用中仍存在不少问题,在视频流传输和图像质量方面,虽然已经有所改善,但是仍不尽如意：在视频监控业务方面,随着移动智能终端的发展,用户的需求也更丰富;而在视频存储方面,随着视频数据规模的日益庞大,对视频资源的存储与管理要求也更高。论文讨论分析了移动视频监控的关键技术,并应用于移动视频监控系统设计中,成果在实验室承担的《环境监测现场质量控制感知系统研究及应用示范》和江苏省物联网应用示范工程的一个子课题《基于IOS、Android平台的信息互动服务系统研究》多有体现。论文描述了国内外移动视频监控及相关技术的研究现状及应用场景,详细分析讨论了H.264编解码、Java NI0传输、位置服务、云存储与视频流迁移等技术及其应用方式,给出了移动视频监控系统组成结构,系统包括移动视频采集终端、云存储服务器及视频资源发布的3个子系统。对于实时视频采集与传输,在基于Android平台下开发实现,给出了移动视频QoS机制,保证视频传输的流畅及视频质量,结合了位置服务提高系统的可扩展性,克服了原先监测系统监测区域固定、指挥调度不便、实时决策分析能力差的缺点。对于服务器,采用了云存储技术,使用普通PC机群来搭建云存储服务器,解决了视频数据量大及存储空间可扩展问题,并且给出了基于多因素加权的节点调度算法和视频迁移算法保证数据的可靠性和提高良好的服务。对于视频资源发布,详细描述了视频流播放、历史视频查看及基本资源管理的实现流程。论文的贡献在于：1)提出了移动视频传输的QoS机制,在无线网络存在传输带宽受限和传输易受干扰的局限性下,有效地保证了视频传输的流畅性和视频的质量。2)结合位置服务,丰富了视频监控的业务,简化后期的整理分析工作,增强其扩展性。3)设计并实现了移动视频监控应用系统,采用了云存储技术,提高系统的稳定性、可靠性和可扩展性。4)提出了视频流迁移算法,实现视频传输的无缝连接,在维护视频数据传输的稳定性起着至关重要的作用。
[Abstract]:With the development of mobile terminal technology and communication technology, mobile video has entered a new stage of development. The corresponding technologies such as mobile streaming media, video compression and information flow, bandwidth adaptive transmission, etc. However, there are still many problems in practical application. Although video stream transmission and image quality have been improved, they are still unsatisfactory: in video surveillance business, with the development of mobile intelligent terminal, In the aspect of video storage, with the increasing scale of video data, the requirement of storage and management of video resources is higher. This paper discusses and analyzes the key technology of mobile video surveillance, and applies it to the design of mobile video surveillance system. The research and application demonstration of the field quality control perception system of environmental monitoring undertaken by the laboratory and the research of information interactive service system based on IOS,Android platform in Jiangsu Province are mostly reflected in the research of "Information Interactive Service system based on IOS,Android platform", which is a sub-topic of the Application demonstration Project of the Internet of things in Jiangsu Province. This paper describes the research status and application scenarios of mobile video surveillance and related technologies at home and abroad, and analyzes and discusses the H.264 codec NI0 transmission, location services, cloud storage and video stream migration technologies and their application methods in detail. The structure of mobile video monitoring system is presented. The system includes three subsystems: mobile video acquisition terminal, cloud storage server and video resource release. For real-time video acquisition and transmission, the mobile video QoS mechanism is developed based on the Android platform, which ensures the smooth video transmission and video quality, and improves the scalability of the system by combining the location service. It overcomes the shortcomings of the original monitoring system, such as fixed monitoring area, inconvenient command and dispatch, and poor ability of real-time decision analysis. For the server, the cloud storage technology is adopted, and the general PC cluster is used to build the cloud storage server, which solves the problem of large amount of video data and extensible storage space. A multi-factor weighted node scheduling algorithm and a video migration algorithm are presented to ensure the reliability of the data and improve the good service. For the release of video resources, the implementation process of video stream playback, historical video viewing and basic resource management is described in detail. The contribution of this paper lies in: (1) the QoS mechanism of mobile video transmission is proposed. Under the limitation of limited transmission bandwidth and vulnerable to interference in wireless network, the fluency of video transmission and the quality of video are effectively guaranteed. It enriches the service of video surveillance, simplifies the work of finishing and analyzing in the later period, and enhances its expansibility. 3) the mobile video surveillance application system is designed and implemented. The cloud storage technology is adopted to improve the stability of the system. (4) A video stream migration algorithm is proposed to realize the seamless connection of video transmission, which plays an important role in maintaining the stability of video data transmission.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.6

【相似文献】