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IEEE Chapter talk - Formal methods for complexity adaptation and error resiliency in multimedia systems - Dr. Yannis Andreopoulos

  • Στοιχεία επικοινωνίαςΘάνος Στουραΐτηςemail:thanos AT ece.upatras.gr

20.12.2007, Τμήμα Ηλεκτρολόγων Μηχανικών και Τεχνολίγας Η/Υ, Αίθουσα σεμιναρίων

Invitation to attend a lecture on

"Formal Methods For Complexity Adaptation and Error Resiliency In Multimedia Systems"

on 13:00 - 14:00, Thursday, December 20, 2007,

at the Conference room (next to the Secretariat Office),

Electrical and Computer Engineering Department, University of Patras

by Dr. Yannis Andreopoulos, Lecturer, University College London, UK

The lecture is sponsored by the Greek chapters of the Signal Processing and Circuits and Systems societies

of the Institute of Electrical and Electronic Engineers (IEEE)


In the first part of this talk, we present the basic principles of a new approach for analytic complexity modeling of media systems and also our novel concept of incremental refinement of computation for media realizations. Envisioned applications include complexity-driven reconfigurable compression and transmission systems, as well as incremental realization of transform and media processing tasks for reconfigurable video processing and computer vision. Ultimately, we hope that this work will lead to a set of domain-specific formal definitions for complexity-per-bit in multimedia processing algorithms.

In the second part, we address the problem of error resiliency in multimedia coding and transmission systems that perform adaptive temporal decompositions. We recast this problem into the domain of perturbation theory of linear systems. Our analysis derives upper bounds for the estimation of the mean square error of adaptive lifting scheme reconstructions of multimedia signal under noise. Applications of the theory are in multimedia transmission over unreliable networks and rate vs. quantization-plus-channel distortion optimization for multimedia coders.

For more information, including preprints of related publications, please visit:



Yiannis Andreopoulos (M '00) obtained the Electrical Engineering Diploma and the MSc in Signal Processing Systems from the University of Patras, Greece in 1999 and 2000, respectively. He obtained the PhD in Applied Sciences from the University of Brussels (Belgium) in May 2005. During his thesis work he participated and was supported by the EU IST-project MASCOT, a Future and Emerging Technologies (FET) project. During his post-doctoral work at the University of California Los Angeles (US) he performed research on cross-layer optimization of wireless media systems, video streaming, and theoretical aspects of rate-distortion-complexity modeling for multimedia systems. From Oct. 2006 to Dec. 2007, he was a Lecturer at the Queen Mary University of London (UK). He is now a Lecturer at the Electronic and Electrical Engineering Department of the University College London (UCL).

During 2002-2003, Dr. Andreopoulos made several decisive contributions to the ISO/IEC JTC1/SC29/WG11 (Motion Picture Experts Group ? MPEG) committee in the early exploration on scalable video coding, which has now moved into the standardization phase. In 2007, he won the ?Most-Cited Paper? award from the Elsevier EURASIP Journal Signal Processing: Image Communication.

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