基于概率估计的自适应媒体播放算法

Adaptive Media Playout Algorithm Based on Probability Estimation

针对缓冲区下溢造成的视频播放抖动和中断问题,提出一种基于概率估计的自适应媒体播放算法。根据网络信道状态和估计的下溢概率和上溢概率控制视频帧的持续播放时间,适当控制播放速率的变化范围和变化量,减少缓冲区下溢概率和播放时延,实现视频平滑播放。仿真结果证明,该算法性能优于传统的自适应媒体播放算法。

An Adaptive Media Playout（AMP） algorithm based on probability estimation is proposed to reduce the video playout jitter and playout halt caused by buffer underflow. It adjusts the duration of each frame according to the channel state and the estimated probability of underflow and overflow. It controls the playout rate range and the variation of the playout rate of the consecutive video flames to achieve the purpose of eliminating buffer outage and smoothing the video playout speed. Simulation results demonstrate that as compared to other AMP schemes, the proposed algorithm provides better performance.