基于细粒度调整的同步播放控制算法

An Intra-Media Synchronization Control Algorithm Based on Fine Granularity Adjustment of Streaming Media Playback Rates

针对网络时延和时延抖动引起缓存波动而造成的流媒体播放不连续,基于接收端播放速率调整,提出一种播放速率自适应调整的播放缓存控制算法。算法依据缓存区的占用水平,通过构造控制序列,动态、细粒度地调整媒体的播放速率。在校园网环境下的模拟结果表明,该算法能够有效地减少缓存上溢或下溢引起的播放跳跃或停顿,从而实现流媒体的平滑播放。

Focus on the discontinuity of streaming media play-out which caused by network delay and delay jitter,an improved play-out control algorithm is proposed in order to keep streaming media play-out smoothly,which based on the adjustment of receiver play-out speed.In the algorithm,a fine granularity adjustment of streaming media playback rates according to the occupied buffer level and the use of play-out speed control sequence is adopted to eliminate the intention of buffer underflow or overflow.Simulation results show that the proposed algorithm is more effect to avoid the skip and stop,and keep the playback smoothly.