Abstract: The presentations of multimedia objects are considered and the synchronization requirements for a multimedia presentation with user participant are studied. A new multimedia synchronization model, called IMPSM, is proposed. IMPSMis a synchronization presentation model based on Petri-Nets. It can be used tohandle interactive presentation of multimedia objects, supports a wide range oftemporal synchronization specification, including determinate and indeterminatetemporal scenario.

Key words: data communications, multimedia synchronization, synchronization specifization