Events Calendar

Cross-Layer Design for Scalable Video over IEEE 802.11e WLANs

Speaker: Jianfei Cai, Ph.D.School of Computer Engineering,
Nanyang Technological UniversityAbstract:
Recently, a new standard, IEEE 802.11e, has been developed to support QoS in WLANs for multimedia applications. In this talk, I will first give a brief introduction on the MAC-layer QoS mechanism provided by 802.11e and also the 3D wavelet based scalable video codec we developed. Then, I will present our cross-layer design for scalable video coding over 802.11e. The cross-layer design consists of a macro and a micro rate control schemes residing at the application layer and the network sublayer respectively. The macro rate control uses bandwidth estimation to achieve optimal bit allocation with minimum distortion. The micro rate control employs an adaptive mapping of packets from video classifications to appropriate network priorities which preemptively drops less important video packets to maximize the transmission protection to the important video packets. Finally, I will show you some experimental results.Biography:
Dr. Jianfei Cai received his PhD degree from University of Missouri-Columbia in 2002. Currently, he is an Associate Professor with Nanyang Technological University, Singapore. His major research interests include digital media processing, multimedia compression, communications and networking technologies. He has published more than 80 technical papers in international conferences and journals. He has been actively participated in program committees of various conferences. He served as one of the track co-chairs for IEEE ICME 2006 & 2008, the technical program co-chair for Multimedia Modeling (MMM) 2007 and the conference co-chair for Multimedia on Mobile Devices 2007. He is also an Associate Editor for IEEE Transactions on Circuits and Systems for Video Technology (T-CSVT), and a Guest Editor for the special issue on Wireless Video in EURASIP Journal on Applied Signal Processing (JASP) in 2007. He is a senior member of IEEE.Host: Professor C.C.-Jay Kuo,
e-mail: cckuo@sipi.usc.edu

Location: Seaver Science Library (SSL) - 150

Audiences: Everyone Is Invited

Contact: Talyia Veal