摘要： 音、视频信息的同步重演是多媒体应用系统实现的关键技术和难点之一,该文探讨了音、视频同步的机制,依据基于参考点的同步思想创建了以音频为时间主导的同步模型,提出了在解码端运用的音、视频同步算法,并给出了同步的判断准则和实际处理的过程。算法已应用于基于MPEG-4编码标准的分布式多媒体监控系统中,实验表明,它能准确、可靠地实现音、视频连续同步重演,并具有较好的通用性。

关键词: MPEG-4, 监控系统, 同步, 时间戳

Abstract: The requirement of continuous retrieval, and the presence of multiple media streams whose display ing must proceed in a mutually synchronized manner are the distinguishing features that are unique to digital multimedia. The paper analyzes its theory,defines synchronization unit and timestamp based on the concept of reference points, and constructs a synchronization model using audio as the time-master. Then a new synchronization algorithm used on the decoding side is brought forward, also the judge rule of synchronization is provided and the processing steps are given. This audio video synchronization algorithm is successfully adopted in a remote surveillance system based on MPEG-4. The experimental results show that the algorithm can realize an accurate and credible synchronization.

中图分类号: 

• TN919.8