Real-Time Audiovisual Feature Extraction for Online Service Provision over DVB Streams

The purpose of this work is to achieve real time extraction of content based metadata from the audiovisual information embedded in a DVB stream, with the innovative aim to on-line including into the same stream both the extracted metadata and applications developed over them, following the recommendations of recently created standards (DVB-MHP, MPEG-7, Metadata over MPEG-2, etc.) and of those still under standardization (e.g., MPEG-21). From this point of view, this is a kind of On-line AV Service Provision Centre, which is a main part of what we will refer to as DYMAS System. This paper describes the most challenging part of this system.

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