摘要
空间多媒体通信具有丢包率高、传输时延长、抖动大、资源受限等特点。为满足音视频同步QoS要求,提出了一种基于RTP/RTCP协议的音视频实时同步算法,以音频流为主媒体流,通过控制视频播放实现音视频同步。该算法无需全网同步时钟与反馈机制,具有较低的算法复杂度,适用于空间多媒体通信。仿真实验结果表明,该同步算法有效提高了空间多媒体通信系统中的音视频媒体间同步性能,满足空间通信的音视频同步QoS性能要求。
Space multimedia communication is characterized with high packet loss rate, large transmission delay jitter and resource -limited. In order to satisfy the Quality of Service （QoS） requirements of audio -video synchronization, an algorithm of audio - video synchronization based on RTP/RTCP is proposed. With audio as master media stream, the scheme regulates the playout of video sequence to synchronize the presentation of video sequence with audio sequence. The algorithm has low complexity, and it is applicable to space multimedia communication without the need of a global clock or feedback mechanism. Results of simulation experiments confirm that the proposed algorithm effectively improves the synchronization between audio and video, and it can satisfy the requirements of the QoS of audio -video synchronization for space communication users.
出处
《计算机仿真》
CSCD
北大核心
2010年第6期130-134,共5页
Computer Simulation
基金
国家"863"计划项目(2007AA0Z297)
国家自然科学基金项目(60773137)
