Audio Engineering Society Convention Paper Presented at the 126th Convention 2009 May 7–10 Munich, Germany The papers at this Convention have been selected on the basis of a submitted abstract and extended precis that have been peer reviewed by at least two qualified anonymous reviewers. This convention paper has been reproduced from the author's advance manuscript, without editing, corrections, or consideration by the Review Board. The AES takes no responsibility for the contents. Additional papers may be obtained by sending request and remittance to Audio Engineering Society, 60 East 42 nd Street, New York, New York 10165-2520, USA; also see www.aes.org. All rights reserved. Reproduction of this paper, or any portion thereof, is not permitted without direct permission from the Journal of the Audio Engineering Society. Spatial audio content management within the MPEG-7 standard of ambisonic localization and visualization descriptions Dimoulas C. A. 1 , Kalliris G. M. 2 , Avdelidis K. A. 3 and Papanikolaou G. V. 4 1 Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece babis@eng.auth.gr 2 Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece gkal@jour.auth.gr 3 Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece avdel@auth.gr 4 Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece pap@eng.auth.gr ABSTRACT The current paper focuses on spatial audio video / imaging and sound field visualization using ambisonic- processing, combined with MPEG-7 description schemes for multi-modal content description and management. Sound localization can be easily delivered using multi-band ambisonic processing under free-field and single point- source excitation conditions, offering an estimate on the achieved accuracy. Sound source forward propagation models can be applied in case that confident localization accuracy has achieved, to visualize the corresponding sound field. Otherwise, 3D audio/surround sound reproduction simulation can be used instead. In any case, sound level distribution colormap-videos and highlighting images can be extracted. MPEG-7 adapted description schemes are proposed for spatial-audio audiovisual content description and management, facilitating a variety of user- interactive post-processing applications.