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SUMMARY:Coded Wireless Video Broadcast/Multicast - A Framework To Harvest 
 The True Potential Of 4G Access Networks - James She (Univ. Waterloo)
DTSTART:20091211T160000Z
DTEND:20091211T170000Z
UID:TALK21732@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:Advancements in video coding and wireless communications\, par
 ticularly in emerging 4G access networks\, have created many foreseeable a
 nd exciting wireless video broadcast/multicast applications. Although usin
 g shared broadcast radio signals can nicely scale the system capacity rega
 rdless of the number of receivers\, the rate is limited by the poorest-cha
 nnel receiver for the largest scalability. This prohibits the true potenti
 al of any 4G access network to enable high-quality video broadcast\, such 
 as for high-definition TV content.\n   For efficient and robust wireless v
 ideo broadcast/multicast under fading\, this talk presents a novel cross-l
 ayer framework that exploits the interplay between applying protections on
  any successively refinable video source and transmitting through a layere
 d broadcast/multicast channel. It is achievable by using multiple descript
 ions coding on a scalable video source and using superposition coding for 
 layered broadcast/multicast transmission. The results from both communicat
 ion engineering and information-theoretical perspectives reveal the scenar
 ios for the framework to lead to a lower distortion than a legacy system. 
 Most importantly\, this generic framework contributes to the advancement i
 n the related research fields by introducing a new design dimension in ter
 ms of protection. It is unique when compared to all previous approaches th
 at are often manipulating conventional parameters alone such as power and 
 modulation scheme. The impact of this dimension was unapparent in the past
 \, but is now proven as an effective means to enable high-quality\, effici
 ent\, and robust wireless video broadcast/multicast in any 4G access netwo
 rk.\n\nBio: James She (http://www.cl.cam.ac.uk/~js864) is currently a visi
 ting Research Fellow in the Computer Laboratory at the University of Cambr
 idge\, UK. He completed his Ph.D. in Electrical and Computer Engineering f
 rom the University of Waterloo (UW)\, Canada\, in August 2009. His researc
 h interests are in wireless multimedia delivery and sensing communications
 . His Ph.D. \nthesis on Coded Wireless Video Broadcast/Multicast received 
 the funding supports from various provincial and national government/resea
 rch agencies for prototyping and commercialization. During his Ph.D. study
 \, he has generated 5 International\, US\, Taiwanese patents and authored/
 co-authored 20 publications. James also received his M.Phil. in Electrical
  and Computer Engineering from the Hong Kong University of Science and Tec
 hnology\, Hong Kong. Two US and Chinese patents resulted from his Master's
  thesis were licensed to a startup company in video content delivery netwo
 rk - SinoCDN Limited (Hong Kong). From 2000-2003\, James served as the Chi
 ef Technology Officer for SinoCDN Limited.\n   He is a recipient of the ho
 nor of "Outstanding Achievement of Graduate Studies" awarded by UW and two
  Canadian national awards in 2009 - NSERC Postdoctoral Fellowship Award an
 d NSERC Innovation Challenge Award (the 1st runner-up). In 2001\, James wa
 s the youngest recipient\, to-date\, to be named one of "Ten Outstanding Y
 oung Digi-Persons" by the Innovation and Technology Association and the In
 formation Technology Department\, of the Government of Hong Kong. In addit
 ion\, he received two Hong Kong Industry Awards with his patented technolo
 gy. The same patents were acquired by a US firm in 2008.\n
LOCATION:FW26\, Computer Laboratory\, William Gates Builiding
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