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Design, Implementation and operation of a Distributed Annotation Environment

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Distributed multimedia services envisaged today in most cases distinguish sharply between service and content provider on one side and consuming users on the other side. Only a few applications have been realised strengthening the role of end-users both as content provider and consumer. Existing multimedia authoring systems are either application specific or allow solely combinations of media generated entirely by a user, as is the case for multimedia mail. The DIANE project develops a multimedia service removing these deficits. The major specification, design and implementation work for a first prototype of the annotation system have been completed. Based on Java technology and its application programming interfaces (API), in conformity to the architecture specification deliverable, the DIANE client/server system reuses MHEG concepts for multimedia presentation and implements continuous audio-visual streams on top of a asynchronous transmission mode (ATM)-based transport system. A special multimedia document model is designed to accommodate the annotation usage scenarios. The main expected benefits from using DIANE will be on one side a better utilization of expert manpower resources. On the other side, it can be expected that current communication barriers will be reduced, if easy creation of multimedia annotations for arbitrary applications is made possible for distributed users in general or relating to the DIANE trials (in telemedicine, teletraining and industrial engineering in particular).

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