Forensics

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My main research interests on forensic multimedia including:

1. forensic audio analysis - voice analysis, automatic speaker recognition, recordings authentication, audio enhancement

2. forensic image analysis - biometric analysis, photo and video recordings authentication, image enhancement

3. forensic IT and telecommunication analysis - data recovery & analysis.

Scientific Articles/Papers

Grigoras, C. (2010) Statistical Tools for Multimedia Forensics: Compression Effects Analysis, AES 39^th International Conference Audio Forensics, Hillerod, Denmark

Grigoras, C. (2009) Applications of ENF Analysis in Forensic Authentication of Digital and Video Recordings, Journal of Audio Engineering Society Volume 57 Issue 9 pp.643-661

Grigoras, C., Cooper, A., Michalek, M. (2009) Forensic Speech and Audio Analysis Working Group - Best Practice Guidelines for ENF Analysis in Forensic Authentication of Digital Evidence, ENFSI - FSAAWG

Becker, T., Jessen, M., Grigoras, C. (2009) Speaker Verification Based on Formants Using Gaussian Mixture Models, NAG/DAGA International Conference on Acoustics, Rotterdam, The Netherlands

Becker, T., Jessen, M., Grigoras, C. (2008) Forensic Speaker Verification Using Formant Features and Gaussian Mixture Models, Interspeech 2008, Brisbane, Australia

Grigoras, C. (2008) Applications of ENF Analysis Method in Forensic Authentication of Digital Audio and Video Recordings, 123^rd AES Convention, New York, USA

Grigoras, C. (2007) Applications of ENF criterion in forensic audio, video, computer and telecommunication analysis, Forensic Science International 167 v2-3 (2007) 136-145

F. Nolan and C. Grigoras (2005) A case for formant analysis in forensic speaker identification, International Journal of Speech, Language and the Law 12(2) 143-173

Grigoras, C. (2005) Digital audio recording analysis: The Electric Network Frequency (ENF) Criterion, International Journal of Speech, Language and the Law 12(1) 64-76

Grigoras, C. (2003) Digital audio recording analysis. The Electric Network Frequency Criterion. DiamondCut DCLive Forensics Application Note

Grigoras, C. (2002) Digital audio recording analysis. The Electric Network Frequency Criterion. Tracertek Forensic Application Note

Scientific Research Grants

EU Grant (2007 - 2010) Correlation between phonetic-acoustic-auditory and automatic approaches in forensic speaker identification

IAFPA Grant (2003 - 2005) The Long Term Cumulative Formant Distribution in Forensic Voice Analysis

Presentations

Grigoras, C. (2007) Applications of ENF Methodology in Forensic Audio Authentication, Audio Engineering Society Convention, Vienna, Austria

Grigoras, C., Moreno, A. (2007) Automatic Speaker Recognition Methodology using BATVOX, Symposium of Forensic Sciences, Cluj-Napoca, Romania

Del Monte, F., Bouten, J., Grigoras, C., Gonzalez-Rodriguez, J. (2006) Dating of Digital Audio Recordings by Matching of Electrical Network Frequency Patterns, EAFS, Helsinki, Finland

Grigoras, C. (2006) Applications of ENF Criterion in Forensic Audio, Video, Computer and Telecommunication Analysis, Audio Engineering Society Convention, Paris, France

Nolan, F., Grigoras, C. (2004) Formant analysis in forensic speaker identification: a justification and a new method, IAFPA 2004 Helsinki, Finland

References

Bijhold, J., Ruifrok, A., Jessen, M., Geradts, Z., Ehrhardt, S., Alberink, I., (2007) Electronic Evidence - Forensic Audio and Visual Evidence - A Review 2004 to 2007, 15^th International Forensic Science Symposium, Lyon, France, p. 375, 379, 380, 386, 397

Brixen, E. B. (2007) Further Investigation into the ENF Criterion for Forensic Authentication, Audio Engineering Society 123^rd Convention, New York, USA

Brixen, E. B. (2007) Techniques for the Authentication of Digital Audio Recordings, Audio Engineering Society 122^nd Convention, Vienna, Austria

McDougall, K. (2006) Dynamic features of speech and the characterization of speakers: toward a new approach using formant frequencies, International Journal of Speech, Language and the Law 13(1) 89-126

Cooper, A. J. (2006) Detection of Copies of Digital Audio Recordings for Forensic Purposes, PhD Thesis, The Open University, Faculty of Technology, Department of Information and Communication Technology, Milton Keynes, UK

Morjaria, N. (2006) An Investigation into the Electrical Network Frequency (ENF) Techniques for Forensic Authentication of Audio Files, BSc Thesis, Nottingham Trent University

Kajstura, M., Trawinska, A., Hebenstreit, J. (2005) Application of the electrical network frequency (ENF) criterion. A case of a digital recording, Forensic Science International 155 v2-3, 165-171

Byrne, C., Foulkes, P. (2004) The Mobile Phone Effect on Vowel Formants, International Journal of Speech, Language and the Law 11(1) 83-102

Broeders, A. (2004) Forensic Speech and Audio Analysis, Forensic Linguistics, 14^th International Forensic Science Symposium, Lyon, France, p. 181, 187

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