The Multimedia Metadata Community (http://www.multimedia‐metadata.info) Presents the Proceedings of the 9th Workshop on Multimedia Metadata (WMM’09) Toulouse, France, March 19‐20, 2009 Edited by Romulus Grigoras, IRIT ‐ University of Toulouse Vincent Charvillat, IRIT ‐ University of Toulouse Ralf Klamma, RTWH Aachen University Harald Kosch, University of Passau Foreword We have the pleasure to organize the 9th Workshop on Multimedia Metadata which comes to support the work done by the Multimedia Metadata Community (http://www.multimedia‐ metadata.info). The 2009 workshop has a special focus on context‐aware mobile multimedia services and is held in conjunction with the 13th French Multimedia Conference on Compression and Representation of Audiovisual Signals (CORESA 2009). Both events share joint panels and sessions bringing researchers and industry experts to fruitful discussions. This year's program features invited renowned researchers. Timo Ojala, from the University of Oulu, will give an invited talk on the opportunities that mobile devices equipped with wireless data transmission provide for context‐aware and ubiquitous computing. Christian Timmerer (ITEC Klagenfurt) and Stéphane Pateux (Orange Labs), researchers working actively within multimedia standardisation bodies, are animating a discussion on the current state of MPEG standards and the acceptance status in industry. They will also provide insights into future evolutions of these standards. We have a quality programme composed of 9 regular papers and a doctoral symposium featuring 3 papers. Our first thanks go to the reviewers, who provided timely and thorough reviews. Their suggestions allowed authors to better their contributions. Naturally, our thanks also go to the joint sponsors of CORESA'09 and WMM'09: CNES, Orange Labs, Noveltis, Fitting Box, IRIT, INP Toulouse, Grand Toulouse and Région Midi‐Pyrénées. Their financial and logistic support has been essential to the organisation of our workshop. We wish you a productive and enriching workshop and an excellent stay in Toulouse. Your workshop co‐chairs, Romulus Grigoras, IRIT ‐ University of Toulouse Vincent Charvillat, IRIT ‐ University of Toulouse Ralf Klamma, RTWH Aachen University Harald Kosch, University of Passau