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deligiannisThe ΙΕΕE Greece Section in cooperation with the Student Branches of ΙΕΕΕ of the University of Patras and University of Central Greece, organize the second of a series of lectures cycle i-YSC (Young Scientist's Corner initiative). These events are designed to provide an opportunity for undergraduate and graduate students and doctoral students to attend high-level conferences on current topics of technology and at the same time to get acquainted and discuss with talented young researchers who recently completed his doctoral thesis in greek universities or abroad.

This event is a lecture by NIKOLAOS DELIGIANNIS, postdoctoral researcher in the Department of Electronics and Computer Science at the University Vrije Universiteit Brussel (VUB) in Belgium and will be held on Monday October 29  2012, at 1pm at the Museum of Science and Technology, University of Patras. The subject is:

"Distributed Source Coding: Fundamentals and Applications to Visual Sensors"

The lecture will be in English and will last 1 hour.

Invited are all those interested (members and non-members of IEEE) to watch. The speech will be followed by a discussion.

Those not able to attend the Museum of Science and Technology, University of Patras, will be allowed to attend the event at:


and submit questions to the speaker via the email  This e-mail address is being protected from spambots. You need JavaScript enabled to view it. .

Below is a summary of the speech and a short biography of the speaker.


Wireless sensors are employed to collect information from their surroundings, carry out menial processing and transmit the gathered data to a central base station. Wireless multimedia sensor networks consist of sensors with video capturing functionality that can complement the human ability to safe-guard areas, detect events or explore hard-to-reach (or even hostile) environments. The growth of diverse visual sensor applications is calling for multimedia communication technology capable of dealing with harsh operating conditions, including high compression performance, low computational power, scalable coding and robustness to transmission errors. A promising technology regarded to play a key role in future wireless visual sensors is distributed source coding. The latter stems
from information theoretic findings established in the 70's by Slepian and Wolf and by Wyner and Ziv, according to which efficient compression can be achieved by exploiting correlation at the decoder only.

This talk will dig into the information theoretic fundamentals related to distributed source coding, namely, the Slepian-Wolf coding argument, the rate-distortion with side information at the decoder problem (a.k.a., the Wyner-Ziv coding problem) and the problem of successively refined Wyner-Ziv coding. Efficient code constructions for the aforementioned problems will be presented as well. Furthermore, this talk will concentrate on the technical aspects of the state-of-the-art distributed video coding schemes developed by our research group. Special attention will be given to an important application scenario from the medical imaging domain, namely, wireless capsule endoscopy.

Brief CV

Nikos Deligiannis received the Diploma degree in electrical and computer engineering from the University of Patras, Patras, Greece, in 2006, and the Ph.D. degree in applied sciences (awarded with the highest distinction and congratulations of the jury members) from the Vrije Universiteit Brussel (VUB), Brussels, Belgium, in 2012. From
December 2006 to September 2007, he was with the Wireless Telecommunications Laboratory, University of Patras. He joined the Department of Electronics and Informatics, Vrije Universiteit Brussel in October 2007, where he is currently working as a Post-Doctoral Researcher for the ETRO IRIS research group. His current research interests include statistical channel modeling, multimedia coding, distributed source coding, multiple description coding, and wireless sensor networks. Dr. Deligiannis was the co-recipient of the 2011 ACM/IEEE International Conference on Distributed Smart Cameras Best Paper Award. He is the author or co-author of 40 journal and conference publications, book chapters and of one filled international patent application. Dr. Deligiannis is a member of SPIE and the IEEE
Signal Processing and Communications Societies.