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University of Colorado Denver

National Center for Media Forensics

About Us

National Center for Media Forensics

Catalin Grigoras, Ph.D., Director

As Director of the National Center for Media Forensics, Grigoras has the privilege to coordinate the Center’s activity, including education and scientific projects. His research encompasses digital signal processing in forensic multimedia, including digital recording authentication, audio/image analysis, enhancement, and automatic speaker recognition. His research into digital signal processing has resulted in advanced methods to authenticate digital audio/video recordings and semiautomatic systems for forensic speaker recognition. 

Grigoras was chairman of the European Network of Forensic Science Institutes - Forensic Speech and Audio Analysis Working Group between 2007-2009. He is a member of the Audio Engineering Society Subcommittee on Forensic Audio and the International Association of Forensic Phonetics and Acoustics. He has published numerous forensic audio/video articles and is a co-author of Best Practice Guidelines for ENF Analysis in Forensic Authentication of Digital Evidence (2009).

Jeff M. Smith, M.S., Associate Director

As Associate Director of the National Center for Media Forensics, Smith has the pleasure of helping build the foundation for strengthening forensic sciences in the U.S. through the Center’s education and research programs. Smith’s research areas include the forensic authentication of recorded media, forensic speaker recognition, and the evolving synergy that exists amongst the Digital and Multimedia Evidence disciplines. He is a member of the Audio Engineering Society (AES) as Chair of the Technical Committee on Audio Forensics and past chair of the Colorado Section of the AES. He is also member of the American Academy of Forensic Sciences (AAFS) and the International Association for Identification (IAI). He works closely with law enforcement as member-at-large of the Scientific Working Group on Digital Evidence (SWGDE) Executive Committee and as a member of its Audio Committee. Smith is an alumnus of CU Denver.


Dr. Grigoras and Mr. Smith are co-authors of the Encyclopedia of Forensic Science 2nd Ed​. chapters on "Audio Enhancement and Authentication" and "Digital Imaging Enhancement and Authentication" (2013).​