一种新的基于Petri网的多媒体同步模型

A New Multimedia Synchronization Model Based on Petri Nets

多媒体信息的同步是分布式多媒体信息系统的关键技术。本文在对国外几个典型多媒体同步模型进行分析、比较的基础上 ,提出一个新的多媒体同步模型。该模型不但可以充分、准确、形式化地描述和规范多媒体信息流的时间行为 ,而且还考虑到了分布式环境中多媒体信息的时间特性(如抖动 ) 。

Multimedia synchronization is the k ey of distributed multimedia information systems.Based on the analysis and compa rison of several typical multimedia synchronization models,this paper prese nts an improved multimedia synchronization model.The new model not only can desc ribe and specify the temporal behavior of multimedia information stream fully,a ccurately and formally,but also takes the temporal properties of distributed sys tems(e.g.jitters)into account.Especially,the model has the function of user interaction.