We made a study on generation of multimedia presentations using multimedia data stored in multimedia database.
For multimedia presentations consisting of multimedia data (e.g. video and audio), we need scenarios to specify temporal relations among multimedia data. We proposed petri nets for scenarios.
Media, that we use may be constrained by environment, for example
speakers and size of displays.
For this problem, we adopted coloured petri nets.
By coloured tokens with attributes, for example
we converted speech to text and we made a presentation without speakers.
