一种基于视频转码与IP组播的媒体推送系统设计

摘要

To reduce the server load and improve the bandwidth utilization, this paper proposed a new design of media distribution system. Based on the technique of transcoding and IP multicast, the proposed system took advantage of IP multicast in bandwidth utilization and implemented video data sharing with various formats and rates. It also proposed and analyzed two practical modes to organize the new design. It compared the new design with current ones in the simulation experiments. The results show better performances of the bandwidth utilization and the server load in the proposed system.%为了减轻源节点负载,提高带宽利用率,提出了一种新型媒体推送系统设计.所提系统结合了视频转码与IP组播技术特点,一方面继承IP组播的带宽优势,另一方面实现了多种格式及码率用户间的数据共享.在所提系统的具体组织形式上,提出了顺序模式与上传模式,并对两种组织模式进行了建模分析.在仿真实验中,对所提系统和现行系统进行了仿真实现和比较,结果显示,所提系统在带宽消耗和源节点负载性能上具有一定的优势.