在接收端实现流媒体同步控制的研究

Reasearch of Streaming Media Synchronization implemented by Receivers

为了更好的解决音视频同步问题,提出了一种在RTP/RTCP协议的基础上,在接收端实现流媒体同步控制的方法。根据音视频接收端缓冲区的占用率,以音频流为主媒体流,视频流为从媒体流,通过比较音频帧和视频帧的播放时间标签,对视频帧采取重复/丢弃方式来取得音视频媒体间的同步。实验表明,该种方法具有良好的同步性,既能满足P-QoS（可感知服务质量）要求又能满足实时性要求。

In order to better solve the problem of streaming media synchronization of audio and video,a control method based on the RTP/RTCP implemented by receivers is presented.According to the occpuied level of AV receiver buffer,With audio as master media stream and video as slave stream,the method makes a comparison between the presentation time stamp of the audio frame and the video frame and repeat / drop the video frame to achieve audio and video synchronization.Experimental results show that the method can satisfy the P-QoS（perceived quality of service） requirements and can meet the real-time requirements.