BeTrIS - An Index System for MPEG-7 Streams

The ISO/IEC Motion Picture Group (MPEG) issued in 2002 a standard, called MPEG-7, which enables the content description of multimedia data in XML. The standard supports applications to exchange, identify, and filter multimedia contents based on MPEG-7 descriptions. However, especially mobile applications that deal with MPEG-7 suffer from limited bandwidth, low computational power, and limited battery life. In this document, we describe an index system adopted from database systems that al low filter mechanisms and r andom a ccess to enco ded MPEG-7 st reams and which overcome the limitation of the networ k and the consuming terminal. Encoding is applied in order to reduce the data rate of the XML documents to be transmitted. The indexed par ts of the enco ded st reams can be accessed w ithout the need to deser ialize the complete st ream. Fur ther more, the system is evaluated and results of the experimental evaluation are discussed.