In this paper, a teleservice for archiving and retrieving multimedia documents using public networks is described. This teleservice encourages a broad range of commercially applicable multimedia archiving applications suitable for an asynchronous access mechanism. It is based on an integrated architecture comprising stand alone archive clients and a multimedia archive server which is realized using a database management system. Archive clients access the archive server via an extended X.400 Multimedia Mail Teleservice. This teleservice reflects the specific requirements of dealing with multimedia documents in a networked environment by supporting a global reference mechanism. The archive server can dynamically compose new versions from an original archived multimedia document including extractions of subsequences of continuous data streams, coding and quality transformations. Thus, users can retrieve multimedia documents that explicitly reflect his individual workstation environment, ...
Heiko Thimm, Katja Röhr, Thomas C. Rakow