We present an implemention of the MPEG-7 standard for multimedia content description of lyric opera in the context of the European IST project: OpenDrama. The project aims the definition, development and integration of a novel platform to author and to deliver rich cross-media digital objects of lyric opera. MPEG-7 has been used in OpenDrama as base technology for a music information retrieval system. In addition to MPEG-7 Multimedia Description Scheme, different classification schemes have been proposed to deal with operatic concepts as musical form (acts, scenes, frames, introduction, etc), musical indications (piano, forte, ritardando, etc), genre and creator roles (singers, musicians, production staff, etc). Moreover, this project has covered the development of an authoring tool for MPEG-7 standard, namely MDTools, which includes segmentation, classification scheme generation, creation and production and media information descriptors.
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