DCT-Domain Video Foveation and Transcoding for Heterogeneous Video Communication

Mr. Shizhong Liu

Electrical and Computer Engineering
The University of Texas at Austin
Austin, TX

Friday, December 7th, 9:00 AM, ENS 637

sliu2@ece.utexas.edu

Abstract

Video transcoding converts a compressed video bit stream from one format to another format for purposes such as channel bandwidth adaptation and receiver adaptation in heterogeneous video communications. Due to the high data volume involved, efficient algorithms are needed for real-time video transcoding, especially for software based implementations. Moreover, since most videos are targeted for human viewers, human vision system (HVS) based video transcoding is desirable to achieve optimal visual quality. In this talk, a foveation embedded video transcoding technique will be discussed, where the foveation property of the HVS is exploited to transcode a uniform resolution video stream into a foveated video stream for better visual quality at a given bit rate. Furthermore, fast algorithms for efficient video transcoding will also be presented. Finally, some video transcoding applications will be discussed.

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 Department of Electrical and Computer Engineering at The University of Texas at Austin. His research interests include digital image/video processing, multimedia communications, digital communication networks, DSP, VLSI and RF circuits design.

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://signal.ece.utexas.edu/seminars