EURASIP Journal on Applied Signal Processing 
Volume 2006 (2006), Article ID 15482, 11 pages
doi:10.1155/ASP/2006/15482

BeTrIS—An Index System for MPEG-7 Streams

Andrea Kofler-Vogt,1 Harald Kosch,1 Joerg Heuer,2 and André Kaup3

 1Department of Information Technology, University Klagenfurt, Klagenfurt 9020, Austria
2Siemens AG, Munich 80333, Germany
3Chair of Multimedia Communications and Signal Processing, University of Erlangen-Nuremberg, Erlangen 91058, Germany
Received 8 September 2004; Revised 9 February 2005; Accepted 4 March 2005

Abstract

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 allows filter mechanisms and random access to encoded MPEG-7 streams and which overcome the limitation of the network and the consuming terminal. Encoding is applied in order to reduce the data rate of the XML documents to be transmitted. The indexed parts of the encoded streams can be accessed without the need to deserialize the complete stream. Furthermore, the system is evaluated and results of the experimental evaluation are discussed.