【摘要】 视频点播(VOD)是一种以用户为主导的音视频信息系统。传统的VOD系统多是C/S模式采用服务器机群或者代理缓存的方式来实现,这会带来较大的硬件和管理开销,系统扩展性也难以得到保证。文中提出了一种基于P2P结构的视频点播的设计方案,分析了采用P2P技术以后视频点播系统对于节点闲散资源的利用和保证播放质量等方面的优势,并探讨了在系统设计与实现中的相关技术与方法,包括基于本体的语义搜索、媒体资源定位与节点负载均衡三方面。更多还原

【Abstract】 Video-on-demand(VOD) is an audio and video integrated information system depends on users’ interest.Traditonal VOD systems apply client-server mode and are implemented with server-cluster or proxy method.It would bring great hardware and administration cost with low systems scalability.Presents a specific design of VOD system which is based on peer-to-peer technology and analyzes the advantages on using node’s resources more effectively and guaranteeing playback quality over those based on client-server architecture.It also includes various technologies used in system implementation,such as semantic search,resource location and load balance.更多还原