A Petri Net Model Approach to the Designs and Measures of Asynchronous Multimedia Presentation

In this paper, we describe how to present different multimedia objects on a multimedia presentation design machine with a structural mechanism. The structural mechanism is based on timed Petri net. Using features of a Petri net to display the behavior of multimedia objects and to introduce the concepts of user navigation messages in our model. Our model provides a feasible method to represent a schedule and the navigation of different multimedia objects with user navigation messages. Users only input a Data Flow Diagram/Control Flow Diagram to the machine, and then the system will display all situations of the presentation and users can dynamically change conditions of requests during the presentation. For testing our machine, we implement the algorithm using timed Petri net diagram, and check the model by a structural analysis. Finally, we measure our multimedia presentations based on software metrics.