Dr. Ricardo L. de Queiroz, Full Professor, Computer Science Department
Universidade Estadual de Campinas, Brazil
Video encoding and transmission is discussed under the perspective of computation reduction and energy savings. Once the connection between computation intensity and energy consumption is established, we aim to reduce complexity and to save energy in mobile devices (in order to fit within the capabilities of low-powered chips and common batteries) and in desktops and servers (to reduce the electric bill) as well. We discuss software-based solutions using scalable-complexity algorithms for video encoding that try to optimize the encoding in a rate-distortion-complexity sense. The idea is to develop a cognitive coder that makes all decisions on its own, i.e. discovers the available bandwidth, available computer power and tolerable distortion, making the appropriate decisions. Rather than using compression speed, we can also measure the complexity as real consumed energy leading to RDE-optimized compression settings, which can halve the energy consumption incurring in very small performance penalties. Other methods using mixed-resolution-video approaches are also discussed. The applications encompass not only mobile devices but also video servers, transcoders, multiview video and free-viewpoint television.
Dr. Ricardo L. de Queiroz received the Engineer degree from Universidade de Brasilia, Brazil, in 1987, the M.Sc. degree from Universidade Estadual de Campinas, Brazil, in 1990, and the Ph.D. degree from The University of Texas at Arlington , in 1994, all in Electrical Engineering. In 1990-1991, he was with the DSP research group at Universidade de Brasilia, as a research associate. He joined Xerox Corp. in 1994, where he was a member of the research staff until 2002. In 2000-2001 he was also an Adjunct Faculty at the Rochester Institute of Technology. He joined the Electrical Engineering Department at Universidade de Brasilia in 2003. In 2010, he became a Full Professor at the Computer Science Department at Universidade de Brasilia. Dr. de Queiroz has published over 140 articles in Journals and conferences and contributed chapters to books as well. He also holds 46 issued patents. He is a past editor for the EURASIP Journal on Image and Video Processing, IEEE Signal Processing Letters, IEEE Transactions on Image Processing, and IEEE Transactions on Circuits and Systems for Video Technology. He has been appointed an IEEE Signal Processing Society Distinguished Lecturer for the 2011-2012 term. He is the General Chair of ISCAS'2011, MMSP'2009, and SBrT'2012. His research interests include image and video compression, multirate signal processing, and color imaging. Dr. de Queiroz is a Senior Member of IEEE, a member of the Brazilian Telecommunications Society and of the Brazilian Society of Television Engineers.