【摘要】 为提高远程视频传输系统的实时性,提出了一个基于Internet的视频传输自适应机制,采用数据包对的方法检测网络带宽,以离散时间Markov链描述网络带宽随机变化的统计信息,并据此对网络带宽做出预测,进而调整视频传输策略,使视频传输率尽量接近网络带宽。经测试,引入该机制后视频帧传输延迟较小且平稳,平均延迟较原来减小33.8%,因而提高了系统实时性,为远程视频传输系统提供了良好支持。更多还原

【Abstract】 The real-time performance of video transmission systems was improved through an internet-based self-adaptation algorithm. The algorithm detects the network bandwidth using packet pairs and builds a discrete-time Markov chain to describe the statistical information for the randomly changing bandwidth to predict the anticipated bandwidth and then adjust the video transmission to a bit-rate close to the anticipatia bandwidth. Tests show that the algorithm smoothes the delay of video frames and reduces the average delay by 33.8%, thus improving the real-time performance to support real-time video transmission systems.更多还原