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This paper discusses the future trends on teleteaching applications. These include remote access to distributed virtual reality resources, information on demand teleservices and multimedia telecommunication environments across high speed multicast networks for teleteaching scenarios. A teleteaching session held by a lecturer in Berlin is multicasted across the regional metropolitan area network. The lecturer has on-line access to some virtual studio and a CM5 supercomputer in Bonn. He can interactively create virtual environments in real-time and the results are multicasted during the lecture. The students may interact with the lecturer via some Multimedia Collaboration Teleservice. They have access to Information on Demand Teleservice (IoD) which provides them with additional background material. The session is broadcasted via satellite link giving more than hundred million people the opportunity to listen and to view lectures.
From the authors' point of view on the current state of R & D on distributed multimedia in Germany there is a significant effort of some key players preparing mltimedia solutions for different applications and markets. Many of them take use of the current workstation/PC technologies. They include new hardware building blocks and new standards in the area of services, coding, compression and networking. Limitations arise from the current computer architectures and the different layers involved.ATM is considered as a key technology for the future WANs as well as for the LANs. For the development of the European market, technologies and applications the authors hope that the Fourth Framework of scientific research and development (1994-1998) of the European Union and its ACTS program will significantly contribute to the nervous system of the economy, and more generally, to tomorrow's society.
