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   C O N T A C T

Ir Laurent Couvreur
Faculté Polytechnique de Mons
Boulevard Dolez 31, B-7000 Mons, Belgium
Phone : +32 65 374775, Fax : +32 65 374729

  
   P R O F I L E

I was born in 1974, in Nivelles, Belgium. I received the Engineering (Ir) degree with highest honors in Electrical Engineering from Faculté Polytechnique de Mons, Belgium, in 1997 and was awarded the "Prix des Electriciens du Hainaut 1997" and the "Prix Luc Soenen 1997". Since then, I have been working as a research engineer in the fields of statistical signal processing, audio signal processing, machine learning and software engineering, with an orientation to Automatic Speech Recognition.

From August 1997 to December 1998, I worked as a research assistant in TCTS lab and got involved in the European project THISL. This project was dedicated to developing an audio mining system for indexing and retrieval of speech data (e.g., broadcast news from TV and radio). I was also involved in the European taskforce COST249.

From January 1999 to December 2000, I was a recipient of both a FNRS grant and a CFWB grant, and worked on the use of microphone array for robust speech recognition in adverse acoustic conditions (e.g., noise and reverberation). From January 2000 to August 2000, I joined the Coordinated Science Laboratory at the University of Illinois at Urbana-Champaign where I worked on multi-channel blind deconvolution of audio sources.

From January 2001 to June 2004, I was with Multitel as a senior research engineer in the speech recognition group working on robust strategies and embedded solutions. Among others, I contributed to the national project MODIVOC.

In July 2004, I came back to TCTS lab and now manage the national project IC&C, which aims at developing multimodal human-machine interfaces combining sketch interpretation, image interpretation and voice recognition in order to provide designers (e.g., architect, engineer, etc) with more natural and less restricting computer-based designing tools. I am also involved in the European taskforce SIMILAR on multimodal interfaces.

Since March 2006, I have been working on auditory scene analysis and more especially in audio event detection with application to multimedia indexing with the national project IRMA and video surveillance with the European projects SERKET and CARETAKER.

In October 2007, I got involved in the NUMEDIART project and now manage the HyFORGE research on hypermedia navigation.

Alongside working on research projects, I have been continously contributing to the core project of the TCTS speech recognition group, the so-called STRUT project, which consists in a complete set of libraries and tools for doing speech recognition research and developing speech-enabled applications. As an expert in audio signal processing and automatic speech recognition, I also carried out several industrial missions (e.g., JCDecaux, 01dB, Acapela, etc). In 1998, I became a shareholder in Babel Technologies, a spin-off company from Faculté Polytechnique de Mons, marketing speech technologies.

I am the author/co-author of about 30 papers in journals and conferences, and a reviewer for technical journals (Journal of the Acoustical Society of America, IEEE Transactions on Speech and Audio Signal Processing, IEEE Transactions on Signal Processing, IEEE Signal Processing Letters, EURASIP Journal on Applied Signal Processing, IEEE Transactions on Multimedia, ELSEVIER Speech Communication, ELSEVIER Mathematics and Computers in Simulation). I have been also a supervisor of several final year student projects at FPMs.

  
   P U B L I C A T I O N S

L. Couvreur, F. Bettens, J. Hancq and M. Mancas, "Normalized Auditory Attention Levels for Automatic Audio Surveillance", Proceedings of International Conference on Safety and Security Engineering (SAFE-2007), Malta, June 2007.

Z. Hammal, L. Couvreur, A. Caplier and M. Rombaut, "Facial Expressions Classification: A new approach based on Transferable Belief Model", International Journal of Approximate Reasoning, vol. 46, no. 3, pp. 542-567, December 2007.

M. Mancas, L. Couvreur, B. Gosselin and B. Macq, "Computational Attention for Event Detection", Proceedings of ICVS Workshop on Computational Attention & Applications (WCAA-2007), Bielefeld, Germany, March 2007.

B. Bozurt, T. Dutoit and L. Couvreur, "Spectral Analysis of Speech Signals Using Chirp Group Delay", In Progress in Nonlinear Speech Processing, Y. Stylianou, M. Faundez-Zanuy, A. Esposito (Eds.), LNCS 4391, pp. 41-57, Springer-Verlag, 2007.

B. Bozurt, L. Couvreur and T. Dutoit, "Chirp Group Delay Analysis of Speech Signals", Speech Communication, vol. 9, no. 3, pp. 159-176, Mar. 2007.

S. Azar, L. Couvreur, V. Delfosse, B. Jaspart and C. Boulanger, "An Agent-Based Multimodal Interface for Sketch Interpretation", Proceeding of IEEE Workshop on Multimedia Signal Processing (MMSP-2006), Victoria, Canada, October 2006.

L. Couvreur, J.-M. Boite, S. Dupont and C. Ris, "Confidence Measure Normalization for Robust Selection of ASR Agents", Proceeding of International Conference on Speech and Computer (SPECOM-2005), vol. 1, pp. 369-372, Patras, Greece, October 2005.

S. Dupont, C. Ris, L. Couvreur and J.-M. Boite, "A Study of Implicit and Explicit Modeling of Coarticulation and Pronunciation Variation", Proceeding of European Conference on Speech Communication and Technology (INTERSPEECH-2005), pp. 1353-1356, Lisbon, Portugal, September 2005.

B. Bozkurt and L. Couvreur, "On the Use of Phase Information for Speech Recognition", Proceeding of European Signal Processing Conference (EUSIPCO-2005), Antalya, Turkey, September 2005.

Z. Hammal, B. Bozkurt, L. Couvreur, D. Unay, A. Caplier and T. Dutoit, "Quiet versus Agitated: Vocal Classification System", Proceeding of European Signal Processing Conference (EUSIPCO-2005), Antalya, Turkey, September 2005.

Z. Hammal, L. Couvreur, A. Caplier and M. Rombaut, "Facial Expression Recognition Based on the Belief Theory: Comparison with Different Classifier", Proceeding of International Conference on Image Analysis and Processing (ICIAP-2005), Cagliari, Italy, September 2005.

Z. Hammal, B. Bozkurt, L. Couvreur, D. Unay, A. Caplier and T. Dutoit, "Classification Bimodale d'Expressions Vocales", Proceeding of GRETSI Workshop on Signal and Image Processing, Louvain-La-Neuve, Belgium, September 2005.

C. Ris and L. Couvreur, "Improving ASR Performance on PDA by Contamination of Training Data", Proceedings of International Conference on Speech and Computer (SPECOM-2004), pp. 236-244, St. Petersburg, Russia, September 2004.

L. Couvreur and M. Laniray, "Automatic Noise Recognition in Urban Environments Based on Artificial Neural Networks and Hidden Markov Models", Proceedings of InterNoise, Prague, Czech Republic, August 2004.

L. Couvreur and C. Couvreur, "Blind Model Selection for Automatic Speech Recogniton in Reverberant Environments", Journal of VLSI Signal Processing, vol. 36, no. 2-3, pp. 189-203, March 2004.

L. Couvreur and C. Ris, "Model-based Independent Component Analysis for Robust Multi-Microphone Automatic Speech Recognition", Proceedings of International Conference on Spoken Language Processing (ICSLP-2002), vol. 3, pp. 2189-2192, Denver, USA, September 2002.

T. Dutoit, L. Couvreur, F. Malfrere, V. Pagel and C. Ris, "Synthèse Vocale et Reconnaisance de la Parole : Droites Gauches et Mondes Parallèles", Proceedings of 6ème Congrès Français d'Acoustique (CFA-2002), Lille, France, April 2002.

L. Couvreur, "Blind Deconvolution for Multi-Microphone Speech Dereverberation: Application to ASR in Reverberant Environments", Proceedings of 3rd IEEE Benelux Signal Processing Symposium (SPS-2002), pp. 1-4, Leuven, Belgium, March 2002.

O. Pietquin, L. Couvreur and P. Couvreur, "Applied Clustering for Automatic Speaker-Based Segmentation of Audio Material", Belgian Journal of Operations Research, Statistics and Computer Science (JORBEL) - Special Issue on OR and Statistics, vol. 41, no. 1-2, pp. 69-81, 2001.

L. Couvreur, "Adaptation Rapide pour une Reconnaissance Robust de la Parole en Environnement Réverbérant", Proceedings of 4èmes Rencontres des Jeunes Chercheurs en Parole (RJC-2001), pp. 62-65, Mons, Belgium, September 2001.

L. Couvreur, C. Ris and C. Couvreur, "Model-based Blind Estimation of Reverberation Time: Application to Robust ASR in Reverberant Environments", Proceedings of European Conference on Speech Communication and Technology (EUROSPEECH-2001), vol. 4, pp. 2631-2634, Aalborg, Denmark, September 2001.

L. Couvreur, S. Dupont, C. Ris, J.-M. Boite and C. Couvreur, "Fast Adaptation for Robust Speech Recognition in Reverberant Environments", Proceedings of International Workshop on Adaptation Methods for Speech Recognition (ITRW-2001), pp. 85-88, Sophia-Antipolis, France, August 2001.

L. Couvreur and C. Couvreur, "Robust Automatic Speech Recognition in Reverberant Environments by Model Selection", Proceedings of International Workshop on Hands-Free Speech Communication (HSC-2001), pp. 147-150, Kyoto, Japan, April 2001.

L. Couvreur, C. Couvreur and C. Ris, "A Corpus-Based Approach for Robust ASR in Reverberant Environments", Proceedings of International Conference on Spoken Language Processing (ICSLP-2000), vol. 1, pp. 397-400, Beijing, China, October 2000.

L. Couvreur and C. Couvreur, "Wavelet-Based Non-Parametric HMM's: Theory and Applications", Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP-2000), vol. 1, pp. 604-607, Istanbul, Turkey, June 2000.

L. Couvreur and C. Couvreur, "On the Use of Artificial Reverberation for ASR in Highly Reverberant Environments", Proceedings of 2nd IEEE Benelux Signal Processing Symposium (SPS-2000), Hilvaranbeek, The Netherlands, March 2000.

L. Couvreur and C. Couvreur, "Wavelet-Based Non-Parametric HMM's: Theory and Applications", Proceedings of 2nd IEEE Benelux Signal Processing Symposium (SPS-2000), Hilvaranbeek, The Netherlands, March 2000.

L. Couvreur and C. Couvreur, "Wavelet-Based Method for Non-Parametric Estimation of HMMs", IEEE Signal Processing Letters, vol. 7, no. 2, pp. 25-27, February 2000.

L. Couvreur and C. Couvreur, "Estimation Non-paramétrique de Modèles de Markov Cachés par Ondelettes", Workshop on Applications of Stochastic Process (GREMARS), Université Lille-3-Charles-de-Gaulle, Villeneuve d'Ascq, France, October 1999.

L. Couvreur and C. Couvreur, "Estimation Non-paramétrique de Modèles de Markov Cachés par Ondelettes", Workshop on Applications of Stochastic Process (FNRS), Faculté Polytechnique de Mons, Mons, Belgium, June 1999.

L. Couvreur and P. Couvreur, "Application de Méthodes de Classification pour la Segmentation Automatique de Programmes Radio/TV en Fonction du Locuteur", Proceedings of 1999 XXXIèmes Journées Françaises de Statistique (SFDS), pp. 423-426, Grenoble, France, May 1999.

L. Couvreur and J.-M. Boite, "Speaker Tracking in Broadcast Audio Material in the Framework of the THISL Project", Proceedings of 1999 Workshop on Accessing Information in Spoken Audio (ESCA-ETRW), pp. 84-89, Cambridge, UK, April 1999.

C. Couvreur and L. Couvreur, "Towards Non-Parametric HMMs : A Wavelet-based Approach", Proceedings of 1999 IEEE Information Theory Workshop on Detection, Estimation, Classification and Imaging (DECI), pp. 49-52, Santa Fe, NM, USA, February 1999.