Clark School Home UMD
Return to Faculty Directory

Liu, K.J. Ray

K.J. Ray Liu
Christine Kim Eminent Professor of Information Technology
2232 Kim Bldg
(301) 405-6619

Research Interests 

  • Signal processing algorithms and architectures.
  • Multimedia communications and signal processing.
  • Wireless communications and networking.
  • Information security.
  • Bioinformatics.


Dr. Liu is the recipient of numerous honors and awards including IEEE Signal Processing Society 2014 Society Award for "influential technical contributions and profound leadership impact"; IEEE Signal Processing Society 2009 Technical Achievement Award for "for pioneering and outstanding contributions for the advances of signal processing in multimedia forensics, security, and wireless communications"; 1994 National Science Foundation Young Investigator Award; best paper awards from IEEE Signal Processing Society, Communications Society, Vehicular Technology Society, and EURASIP; IEEE Signal Processing Society Distinguished Lecturer; and EURASIP Meritorious Service Award. Recognized by Thomson Reuters as an ISI Highly Cited Researcher, Dr. Liu is a Fellow of the IEEE and AAAS. His research was featured as one of seven technologies that IEEE believes will have the world changing implications on the way humans interact with machines, the world and each other, in honor of IEEE's 125th Anniversary.

He also received various research and teaching recognitions from the University of Maryland, including Poole and Kent Senior Faculty Teaching Award, Outstanding Faculty Research Award, and Outstanding Service Award, (each with one award per year from the entire college), all from A. James Clark School of Engineering; Invention of the Year Award (three times) from University's Office of Technology Commercialization, as well as the George Corcoran Award for outstanding contributions to electrical engineering education from Electrical and Computer Engineering Department, and the Outstanding Systems Engineering Faculty Award in recognition of outstanding contributions in interdisciplinary research from Institute for Systems Research.

Dr. Liu is a member of IEEE Fellow Committee. He was the prime architect and proposer of IEEE Trans. on Information Forensics and Security, IEEE Journal on Selected Topics of Signal Processing, and IEEE Trans. on Multimedia. He also initiated the creation of IEEE Trans. on Computational Imaging and IEEE Trans. on Signal and Information Processing over Networks. He has served as the General Chair of 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Hawaii; a Co-General Chair of the First APSIPA Annual Summit and Conference (ASC) in Sapporo, 2009; the Chair of Multimedia Signal Processing Technical Committee; Technical Program Chair of 2003 IEEE International Conference on Multimedia and Expo. He has delivered keynotes/plenaries in various international conferences and workshops and distinguished lectures in many universities/institutes worldwide. He has been consultants to industry and also has served occasionally as expert consultant/witness for legal proceedings. In addition, Dr. Liu also served in the review panels of centers of excellence from various nations and agencies such as National Science Foundation and European Research Council, and many countries.

He has been on the editorial board of IEEE Transactions on Signal Processing, IEEE Journal of Selected Topics in Signal Processing and IEEE Signal Processing Magazine. He has also been a Guest Editor of special issues on Multimedia Signal Processing of Proceedings of the IEEE, special issue on Signal Processing for Wireless Communications of IEEE Journal of Selected Areas in Communications, special issue on Multimedia Communications over Networks of IEEE Signal Processing Magazine, special issue on Multimedia over IP of IEEE Trans. on Multimedia, special issue on cooperative communications and networking of IEEE Journal of Selected Areas in Communications, special issue on signal and information processing for social networks of IEEE Journal of Selected Topics on Signal Processing, and special issue on Signal and Information Processing for Social Learning and Networking of IEEE Signal Processing Magazine.

Dr. Liu is a co-author of "Behavior Dynamics in Media-Sharing Social Networks", Cambridge University Press, 2011; Cognitive Radio Networking and Security – A Game Theoretic View, Cambridge University Press, 2010; Cooperative Communications and Networking, Cambridge University Press, 2009; Resource Allocation for Wireless Networks: Basics, Techniques, and Applications, Cambridge University Press, 2008; Ultra-Wideband Communication Systems: The Multiband OFDM Approach, Wiley, 2007; Network-Aware Security for Group Communications, Springer, 2007; Multimedia Fingerprinting Forensics for Traitor Tracing, EURASIP Book Series on Signal Processing and Communication (Hindawi), 2005; Design of Digital Video Coding Systems: A Complete Compressed Domain Approach, Marcel Dekker, 2001; and a co-editor of Handbook on Array Processing and Sensor Networks, IEEE-Wiley, 2009 and High Performance VLSI Signal Processing: Volume I: System Design and Methodology; Vol. II: Algorithms, Architectures, and Applications, IEEE Press, 1998.

Honors and Awards 

    •    IEEE Signal Processing Society Meritorious Service Award (2016)
    •    IEEE Signal Processing Society Award (2014)
    •    University of Maryland Invention of the Year Award (2010)
    •    IEEE Signal Processing Society Technical Achievement Award (2009)
    •    Clark School Outstanding Faculty Research Award (2008)
    •    American Association for the Advancement of Science Fellow
    •    Fellow, University of Maryland Academy of Excellence in Teaching and Learning
    •    Distinguished Scholar-Teacher Award, University of Maryland (2006-2007)
    •    IEEE Signal Processing Society Best Paper Award (2005)
    •    Poole and Kent Company Senior Faculty Teaching Award - A. James Clark School of Engineering (College of Engineering), University of Maryland (2005)
    •    University of Maryland Invention of the Year Award, Information Science category (2005)
    •    European Association for Signal, Speech and Image Processing (EURASIP) Best Paper Award (2004)
    •    Board of Governors, IEEE Signal Processing Society (2004 - present)
    •    Distinguished Lecturer, IEEE Signal Processing Society (2004)
    •    EURASIP Meritorious Service Award (2004)
    •    Fellow of IEEE (2003)
    •    Best Paper Award - 50th IEEE International Vehicular Technology Conference (VTC), Amsterdam (1999)
    •    Outstanding Systems Engineering Faculty Award, Institute for Systems Research, University of Maryland (1996)
    •    National Science Foundation National Young Investigator (1994)
    •    George Corcoran Award, ECE Department, University of Maryland (1994)
    •    IEEE Signal Processing Society's Senior Award (Best Paper Award) (1993)
    •    Research Initiation Award, Signal Processing Program, National Science Foundation (1993)
    •    Vice President - Publication, IEEE Signal Processing Society (2006 - 2008)
    •    Editor-in-Chief, IEEE Signal Processing Magazine (2003 - 2005)
    •    Editor-in-Chief, EURASIP Journal on Applied Signal Processing (2000- 2002)

Professional Memberships 

IEEE Signal Processing Society

Related News 

Alumnus Peng Qiu Granted Tenure at Georgia Tech
Qiu completed his Ph.D. in 2007 at the University of Maryland; there he was advised by Professor K.J. Ray Liu. February 22, 2017

Liu Wins 2016 IEEE Signal Processing Society Meritorious Service Award
Dr. Liu received the award for exemplary service to and leadership in the Signal Processing Society. January 4, 2017

Alumnus Matthew C. Stamm Wins NSF CAREER Award
Stamm's research seeks to provide information verification and security in scenarios when an information source cannot be trusted October 27, 2016

Ulukus Named 2016-2017 Distinguished Scholar-Teacher by University of Maryland
The Distinguished Scholar-Teacher Program honors members of UMD faculty who have demonstrated outstanding scholarly achievements along with equally outstanding accomplishments as teachers. April 19, 2016

ECE Researchers Win ICASSP Best Student Paper Award
Authors recognized for creation of non-line-of sight positioning system. April 6, 2016

Alumnus Peng Qiu Wins NSF CAREER Award
Qiu wins award for experimental design and model reduction in systems biology. March 3, 2016

Alumnus Jie Chen Elevated to IEEE Fellow
Chen, an electrical engineering professor at the University of Alberta, was promoted to IEEE's highest grade of membership. December 14, 2015

Liu and Alumna Wang Win 2015 SPS Overview Paper Award
Collaboration between ECE professor and former student results in IEEE award December 10, 2015

Four Honored at Fourth ECE Distinguished Alumni Awards
ECE honors a professor, neurosurgeon, philanthropist, and research industry leader. December 9, 2015

Liu Awarded 2016 IEEE Kirchmayer Graduate Teaching Award
Prolific Researcher Recognized for Exceptional Teaching and Mentoring August 17, 2015