无线网络中的平滑自适应媒体播放策略

In this paper, we propose an adaptive media playout scheme to deal with the interruption of streaming video caused by network jitters and packet losses of best-effort networks. In traditional scheme, the fixed threshold is not flexible due to the fluctuation of the wireless network. The fixed adjust rate can also downgrade the user perceive quality. In our scheme, we use the statistics of the receiver to estimate the channel state, and then compute the threshold dynamically. During the adjustment phase, a group of playback rate can be selected, and the rate of the video frame can only change between the adjacent frame rates. This method reduces the time of the frame rate adjustment and ensures that the frame rate will not change too fast to reduce the video quality. The simulation result shows that out scheme improves the reliability and the fluency of streaming media.