存储媒体的媒体内同步反馈控制算法

本文提出了一种存储媒体的媒体内同步反馈控制算法，该方案是建立在缓冲区占用率控制基础上，通过周期性地检查缓冲区的占用情况来检测失步，并将其反馈给发送方，由发送方对发送帧速率进行调整。文章给出了接收方所需缓冲区的设计准则及发送帧速率的调整方法，并分析了算法中各参数对同步性能的影响。实验表明该方案能够处理由于网络传输时延特性变化引起的失步，与其它反馈控制方案相比具有更低的数据丢弃率，从而使接收端播放平滑连续，具有良好的视频播放质量。

A Feedback Control Scheme for Intra-Media Synchronization of Stored Multimedia Streams

A feedback control scheme for intra-media synchronization of stored multimedia streams is proposed.The buffer level is checked periodically to detect asynchronism. Once an asynchronism occurred, a required corrective transmission rate is fed back to the source in order to restore synchronism. The criteria of designing buffer size and the rule of the transmission rate regulation are presented . The effect of several parameters on the scheme is also analyzed. Experimental results show that the scheme is able to deal with asynchronism introduced by the variable average delay. The scheme wins an advantage over previous others in decreasing the probability of lost data and keeping good quality of continuous presentation.