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University of Colorado Denver

National Center for Media Forensics
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Scientific Research

National Center for Media Forensics


The NCMF actively develops basic and applied research projects in areas affecting the analysis and recovery of forensic media. Areas include the enhancement and authentication of forensic audio and imagery as well as biometric comparisons and event analyses from forensic recordings.


NCMF Research

    • An Audio Enhancement Framework for Forensic Purposes by Catalin Grigoras, Jeff M. Smith, and James Zjalic. American Academy of Forensic Sciences 70th Annual Scientific Meeting. 2018.
    • Time Domain Analysis of Lossy Compression Decoding Artifacts by Catalin Grigoras and Jeff M. Smith. American Academy of Forensic Sciences 70th Annual Scientific Meeting. 2018.

    • Digital Image Recompression Analysis: Twitter by Gretchel Lomboy, Catalin Grigoras, and Jeff M. Smith. American Academy of Forensic Sciences 70th Annual Scientific Meeting. 2018.

    • Large Scale Test of Digital Audio File Structure and Format for Forensic Analysis by Catalin Grigoras and Jeff M. Smith. Audio Engineering Society International Conference on Audio Forensics. 2017.​​

    • A Low Cost, Cloud Based, Portable, Remote ENF System by James Zjalic, Catalin Grigoras, and Jeff M. Smith. Audio Engineering Society International Conference on Audio Forensics. 2017.

    • Triage Approach for the Forensic Analysis of Apple iOS Audio Files Recorded Using the "Voice Memos" App by Jeff M. Smith, Douglas Lacey, Bruce Koenig, and Catalin Grigoras. Audio Engineering Society International Conference on Audio Forensics. 2017.

    • Structure and Format Analysis of Lossy Compressed Audio Files by Catalin Grigoras and Jeff M. Smith. American Academy of Forensic Sciences 69th Annual Scientific Meeting. 2017.

    • An Analysis of Apple iOS Effects on Format and Metadata Structure of Audio Files Recorded Using the Native “Voice Memos” App by Jeff M. Smith, Douglas S. Lacey, Catalin Grigoras, and Bruce E. Koenig. American Academy of Forensic Sciences 69th Annual Scientific Meeting. 2017.

    • Forensic Audio Analysis Review 2013-2016 by Catalin Grigoras, Jeff M. Smith, and Andrzej Drygajlo. Interpol 18th International Forensic Science Managers Symposium. 2016.​

    • Forensic Analysis of Digital Audio File Structures and Formats by Catalin Grigoras and Jeff M. Smith. American Academy of Forensic Sciences 68th Annual Scientific Meeting. 2016.

    • Proposed Analytical Framework for Electronically Frequency/Pitch Modified Voices by Eliud Bonilla, Catalin Grigoras, and Jeff M. Smith. American Academy of Forensic Sciences 68th Annual Scientific Meeting. 2016.

    • Source Identification of High-Definition Videos – A Forensic Analysis of Downloaders and YouTube Video Compression Using a Group of Action Cameras by Zac P. Giammarrusco, Catalin Grigoras, and Jeff M. Smith. American Academy of Forensic Sciences 68th Annual Scientific Meeting. 2016.

    • Quantization Level Analysis for Forensic Media Authentication by Catalin Grigoras and Jeff M. Smith. Audio Engineering Society 54th International Conference: Audio Forensics. 2014.

    • Forensic Audio Analysis Review 2010-2013 by Catalin Grigoras, Jeff M. Smith, Geoffrey Stewart Morrison, and Ewald Enzinger. Interpol 17th International Forensic Science Managers Symposium. 2013.

    • Digital Imaging: Enhancement and Authentication by Catalin Grigoras and Jeff M. Smith. In Encyclopedia of Forensic Sciences, edited by Jay A. Siegel and Pekka J. Saukko. Second Edition. Waltham: Academic Press. 2013.

    • Audio Enhancement and Authentication by Catalin Grigoras and Jeff M. Smith. In Encyclopedia of Forensic Sciences, edited by Jay A. Siegel and Pekka J. Saukko. Second Edition. Waltham: Academic Press. 2013.

    • Evaluation of the Average DC Offset Values for Nine Small Digital Audio Recorders by Bruce E. Koenig, Douglas S. Lacey, Catalin Grigoras, Suzana Galic Price, and Jeff M. Smith. Journal of the Audio Engineering Society, Volume 61, Issue 6. June 2013.

    • Analytical Framework for Digital Audio Authentication by Catalin Grigoras, Daniel Rappaport, and Jeff M. Smith. Audio Engineering Society 46th International Conference: Audio Forensics. 2012.

    • Advances in ENF Analysis for Digital Media Authentication by Catalin Grigoras and Jeff M. Smith. Audio Engineering Society 46th International Conference: Audio Forensics. 2012.

    • Evaluation of the Average DC Offset Values for Nine Small Digital Audio Recorders by Bruce E. Koenig, Douglas S. Lacey, Catalin Grigoras, Suzana Galic Price, and Jeff M. Smith. Audio Engineering Society 46th International Conference: Audio Forensics. 2012.

    • Advances in ENF Database Configuration for Forensic Authentication of Digital Media by Catalin Grigoras, Jeff M. Smith, and Christopher Jenkins. Audio Engineering Society 131st Convention. 2011.

    • Statistical Tools for Multimedia Forensics by Catalin Grigoras. Audio Engineering Society 39th International Conference: Audio Forensics. 2010.​

    • ​Computer Forensics for the Forensic Audio Professional by Marcus K .Rogers and Jeff M. Smith. Audio Engineering Society 39th International Conference: Audio Forensics. 2010.


    Research The​ses from the Master of Science in Recording Arts Emphasis in Media Forensics Program