【摘要】 由于视频流服务对于网络服务质量有着较高的要求,而现有的Internet所提供的是尽力而为的服务,无法保证数据的实时传输。该文设计了一个用于Internet上视频流的端到端传输方案.整个方案设计的目的是在网络本身缺乏服务质量保证的条件下尽可能达到最好的视频传输质量。根据可用带宽估计和网络信息反馈,系统对发送速率进行调整,并提供两种视频流服务:存储视频和实时视频。仿真结果表明方案的性能良好,能满足Internet视频流的需求。更多还原

【Abstract】 Video streaming requires high quality of service (QoS) guarantee of transport system, but current Internet only provides best-effort service, and is not suit for real-time transmission of video data. To address the issues of meeting delay-constrained video streaming over Internet, this paper presents an end-to-end adaptive transmission approach without any modification to the Internet infrastructure. The design emphasis is on trying to obtain the best quality of video reception possible in the absence of network QoS guarantees. According to the estimation of available bandwidth and network feedback information, the video steam sender could adjust the sending rate, and then achieve the best transmission efficiency. Two kinds of streaming services have been considered in proposed protocols: stored video and live video. Simulation results show the well performance of proposed system for Internet video streaming.更多还原