VIRTUALTALKER - AN ONLINE MULTIMEDIA SYSTEM ON TOKEN PASSING NETWORKS

Although video phone/conference applications on ISDN networks have bee n a popular product, a similar service on packet switched networks sti ll faces many technical problems. In this paper, the implementation of a multimedia system on a token ring network connecting personal compu ters using commercially available consumer electronic devices is prese nted. This system allows people to interactively communicate with each other at different locations through video phone and shared white boa rd services. Since the system transmits real-time traffic such as vide o and voice over the network, many design and technical issues such as the network protocol, encoding technique, delay jitter, packet size, synchronization of video and voice, and priority assignment are consid ered and presented in this paper.