DCT-Domain Video Foveation and Transcoding for Heterogeneous Video Communication

Mr. Shizhong Liu

Electrical and Computer Engineering
The University of Texas at Austin

Wednesday, February 28th, 9:00 AM, ENS 537

sliu2@ece.utexas.edu

Abstract

With the emergence of video compression standards such as MPEG, H.26x, digital video is becoming widely used in video communications over the Internet such as Web video. However, the explosive growth of the Internet also comes with increasing diversity and heterogeneity in terms of the types of client devices and network connections. Video transcoding is a key technology to support video communications over the heterogeneous networks. While some progresses have been made recently, two problems are still not satisfactorily solved in video transcoding, e.g., 1) real-time operation; 2) improved visual quality for a given channel bandwidth. In this talk, several video transcoding techniques proposed in the literature are reviewed, thereafter a foveation based video transcoding technique is proposed. In particular, Foveation, a characteristic of the human vision system, is exploited and applied to video transcoding to improve visual quality for a given bit rate. Meanwhile, fast algorithms for video transcoding are also developed, which make real time video transcoding feasible.

Biography

Mr. Liu received his B.S. and M.S. degrees in electronic engineering from Tsinghua University, Beijing, China, in 1992 and 1995 respectively. He is now working toward his Ph.D degree in the Electrical and Computer Engineering Department of the University of Texas at Austin. His research interests include fast algorithms for image/video processing and heterogeneous image/video communications.

A list of Telecommunications and Signal Processing Seminars is available at from the ECE department Web pages under "Seminars". The Web address for the Telecommunications and Signal Processing Seminars is http://anchovy.ece.utexas.edu/seminars