Our paper describing the Mbus was presented in the workshop
on Component-based Groupware at the CSCW 2000 conference in
Philadelphia.
The Digital Amphitheatre provides a shared virtual environment, where one
hundred people can conduct an online meeting. The user interface mimics a
lecture room, with background substitution replacing much of the clutter
inherent in typical conferencing environments, to give a greater sense of
presence. The system is agent based, with aggregation points within the
network combining video streams to lower the end system load.