【作者】 丰敏；

【导师】 黄本雄；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2007， 硕士

【摘要】 随着计算机多媒体技术、通信技术和宽带网络技术的迅猛发展,网络与电视相互融合和相互促进成为未来信息传播技术发展的趋势。IPTV使得人们可以方便快捷地享受越来越丰富的数字多媒体内容,但同时媒体内容和用户身份的安全性也在左右和影响数字媒体的价格和市场。因此保证IPTV的安全制作、分发、传播和收看,建立有效可行的访问控制和版权保护措施,IPTV才可能真正实施,才能保证IPTV应用的市场能够正常发展。所以,研究IPTV系统中的数字版权管理系统有着十分重要的意义。通过在基于运营商级的端到端IPTV综合业务平台RollingStream奔流系统上研究IPTV的系统架构,同时对数字版权保护的两种方法进行分析,指出视频水印算法存在的缺点不能适应网络视频版权保护的要求,从而得出在IPTV系统中应采用以数据加密和防拷贝为核心的DRM(Digital Rights Management)技术进行数字版权保护的结论。针对DRM涉及到的三种关键技术和IPTV DRM的商业应用模式,分析了IPTV系统中DRM基本要素的实际含义,并简单介绍了三种DRM解决方案。针对DRM系统的功能体系结构和信息体系结构,给出DRM系统构架、数据模型和数据流图,并且通过对系统模型的分析将数字版权管理的实现交给许可授权服务器,提出许可授权服务器的设计目标、系统控制流程及工作流程。结合DRM的规范和几种实际解决方案,给出IPTV系统中DRM实现的总体方案,并对其中密钥获取技术的实现做了详细的分析,包括流媒体传输协议的头扩展方案、许可证服务器与密钥相关的实现方案、内容处理控制器密钥获取方案以及机顶盒密钥获取方案,最后给出IPTV系统中与DRM相关的媒体上载和频道添加运行界面。通过对该项目的研究,为今后IPTV DRM系统的实现和互通提供了一定的参考。更多还原

【Abstract】 With the computer multimedia technology, communications technology and the rapid development of broadband Internet technology, the television network integration and promoting becomes the trend of the future development of information and communication technologies. IPTV makes it more convenient to enjoy rich digital multimedia content. However, the safety of media content and user identity impact the digital media and market prices. IPTV security of guaranteed production, distribution, transmission and watching, establishing an effective copyright protection and access control measures, IPTV could really implement, The market will be able to ensure the normal development of IPTV applications. Therefore, the study of the digital copyright system based on IPTV has great significance.In this paper, the author studies IPTV system architecture which is based on carrier-class end-to-end integrated IPTV platform RollingStream system, at the same time analysing the digital copyright protection methods, pointing out the shortcomings of video watermarking algorithm can not meet network video copyright protection requirements, so in IPTV system it should use DRM (Digital Rights Management) technology for digital copyright protection which core is data encryption and anti-copy. According to the three key IPTV DRM technology and the commercial application model, the author analyses the actual meaning of IPTV DRM system basic elements and outlines three DRM solutions.According to DRM system functional architecture and information architecture, the author provides DRM system architecture, data model and data flow graph, also through the analysis of system model, the author poses digital rights management realization to license authorization server, proposing design objectives, system control processes and work flow of licensing authorization server.Combining DRM criterion with several practical solutions, this paper gives IPTV DRM system overall realization scheme, and provides a detailed analysis of key acquisition technologies, including the head expansion of Streaming Media Transfer Protocol, the realization of license server related to key, content engine controller and set-top-box key acquisition program. Finally media available and the channel add operation graph in IPTV DRM system are provided. Through the study of this item, this paper will provide certain reference to the realization of the IPTV DRM system and a certain amount of information exchange in the future.更多还原