This volume presents the proceedings of the International COST 237 Workshop, held in Vienna in November 1994 in the framework of the CEC COST 237 Multimedia Telecommunications Services Projects.
The 24 papers presented in revised version were selected from 46 submissions; they are organized in sections on teleservices, multimedia mail, archiving and retrieving; teleservice support; quality of service and synchronization; multipeer communication; broadband network transport issues; and variable bit rate video coding transport.

This text constitutes the refereed proceedings of the 4th European Conference on Multimedia Applications, Services and Techniques, ECMAST'99, held in Madrid, Spain in May 1999. The 37 revised full papers presented were carefully reviewed and selected from a total of 71 submissions. The book is divided in sections on services and applications, multimedia terminals, content creation, physical broadcast infrastructure, multimedia over the Internet, metadata, 3D imaging, multicast protocols, security and protection, and mobility.