大规模流媒体应用中关键技术的研究

支持大规模用户在线使用的流媒体应用是Internet中极富潜力的一项"重磅级应用",但由于Internet缺乏服务质量(QoS)与相应的安全保障,并且网络和终端系统又存在着较大的异构性,这使得在Internet上构建支持大规模用户的在线流媒体应用面临很多的挑战.该文从支持该应用的流媒体编码技术和网络技术两个角度出发,针对其面临的挑战,深入、全面地综述了编码技术与网络技术的发展与现状.提出了一个新的流媒体应用体系结构,以同时解决大规模流媒体应用中的性能瓶颈、异构性、安全传输以及服务质量等问题,并指出了大规模流媒体应用中关键技术的研究方向.

Research on Key Technologies of Large-Scale Streaming Media

Large-scale online streaming video application has gradually become the most important and potential technology of multimedia applications.Since Internet is heterogeneous and there is no Quality of Service(QoS)and security guarantee,large scale online streaming video application over the Internet faces many challenges.This paper,following the development of video sourcing coding and network transmission technology,comprehensively and deeply presents the scalable encoding and error-resilient encoding,and the development of multicast and P2P technology.Specially a new streaming architecture is proposed to satisfy the requirement of QoS,heterogeneity,and security guarantee in practical application.Some detailed analysis and comparisons are conducted in this paper.At last,future research direction is proposed.