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Fabrice Lefèvre
80
Documents
Presentation
### **Full Professor in Computer Science at Avignon University, LIA (Laboratoire d'Informatique d'Avignon)**
### **Specialist in Artificial Intelligence/Natural Language Processing/Human-machine vocal interactions**
### Short Bio
Fabrice Lefèvre received a degree in electrical engineering from ENSEA and the Ph.D. degree in computer science from University Pierre et Marie Curie (now Sorbonne U), France, in 2000. He was appointed an Assistant Professor position at Orsay University, now Paris-Saclay, in 2001 where he worked in the Spoken Language Processing Group at LIMSI-CNRS.
He joined the University of Avignon in 2005, and he is now Professor and head of the Vocal Interactions Group at LIA since 2010. He was an academic visitor in the Engineering Department of Cambridge University in 2009.
His primary research activity is natural language processing (automatic speech recognition and generation, speech understanding, stochastic machine translation, spoken dialogue systems, human-robot interface), his work pioneered recourse to ML-based approaches for semantic analysis of speech. He is the author/co-author of +100 peer-reviewed papers for journals and conferences. He was involved in several European and US projects (CORETEX, AMITIES, EARS, LUNA and Classic). He participated in several international (NIST) and French (AUPELF, Technolangue) spoken language recognition and understanding system evaluation campaigns.
F. Lefèvre has led several projects (ANR muDialBot, Portmedia, OptimNLP or site/workpackage scientific leader for FP6 CORETEX, FP7 LUNA, ANR MaRDi...). He is former head of CERI (Computer Science Center of Avignon University, +100 personnel staff, +500 students), member of administrative board of Avignon Univ. He (co-)organised several manifestations and was on the program committee of many events (Interspeech, SLT, ASRU, SigDial, IWSDS, JEP, TALN...).
F. Lefèvre is member of the International Speech Communication Association, member of IEEE, serves on the IEEE signal processing society, speech and language processing technical committee (SLTC) as an elected member (2012–16) and was cofounder of the French Spoken Communication Association (AFCP). He also serves in Avignon University Administration Board. He was responsible of South Pole of the Institut Cognition (ANR Tremplin Carnot, 2016-19) and member of its operating board. He is now participating in the Direction Committee of ILCB (Institute of Language, Communication and the Brain). In Sept 2021 he was appointed University adviser for scientific integrity.
[CV Long (French) pdf format](https://www.sfrcloud.sfr.fr/web/app/share/invite/0qWrcGEt1O "CV Long en pdf")
Publications
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muDialBot, vers l'interaction humain-robot multimodale pro-active18e Conférence en Recherche d'Information et Applications, 16e Rencontres Jeunes Chercheurs en RI, 30e Conférence sur le Traitement Automatique des Langues Naturelles, 25e Rencontre des Étudiants Chercheurs en Informatique pour le Traitement Automatique des Langues, 2023, Paris, France. pp.26-29
Conference papers
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Portabilité linguistique des modèles de langage pré-appris appliqués à la tâche de dialogue humain-machine en français18e Conférence en Recherche d'Information et Applications -- 16e Rencontres Jeunes Chercheurs en RI -- 30e Conférence sur le Traitement Automatique des Langues Naturelles -- 25e Rencontre des Étudiants Chercheurs en Informatique pour le Traitement Automatique des Langues, 2023, Paris, France. pp.148-158
Conference papers
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Lilia, A Showcase for Fast Bootstrap of Conversation-Like Dialogues Based on a Goal-Oriented System7th International Conference on Statistical Language and Speech Processing (SLSP), 2019, Ljublljana, Slovenia. pp.31-43, ⟨10.1007/978-3-030-31372-2_3⟩
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Renforcement en-ligne pour l’apprentissage conjoint de l’analyseur sémantique et du gestionnaire de dialogue d’un système d’interaction vocaleRencontres des Jeunes Chercheurs en Intelligence Artificielle 2019, Jul 2019, Toulouse, France. pp.27-34
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Joint On-Line Learning of a Zero-Shot Spoken Semantic Parser and a Reinforcement Learning Dialogue ManagerIEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2019, Brighton, United Kingdom. ⟨10.1109/ICASSP.2019.8683274⟩
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Automation and Optimisation of Humor Trait Generation in a Vocal Dialogue SystemINLG Workshop on Intelligent Interactive Systems and Language Generation (2IS&NLG), 2018, Tilburg, Netherlands
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Évaluation de l'adaptation par renforcement d'un générateur en langage naturel neuronal pour le dialogue homme-machineXXXIIe Journées d’Études sur la Parole (JEP), 2018, Aix-en-Provence, France. pp.347-355, ⟨10.21437/JEP.2018-40⟩
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Intégration et évaluation de mécanismes de productions humoristiques dans un agent conversationnel virtuelWorkshop sur les Affects, Compagnons Artificiels et Interactions (WACAI), 2018, île de Porquerolles, France
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Apprentissage en ligne interactif d’un générateur en langage naturel neuronal pour le dialogue homme-machine24ème conférence sur le Traitement Automatique des Langues Naturelles (TALN), 2017, Orléans, France
Conference papers
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Integration and evaluation of social competences such as humor in an artificial interactive agentthe 1st ACM SIGCHI International Workshop, Nov 2017, Glasgow, United Kingdom. pp.41-42, ⟨10.1145/3139491.3139495⟩
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ISIAA 2017: 1st international workshop on investigating social interactions with artificial agents (workshop summary)19th ACM International Conference on Multimodal Interaction, Nov 2017, Glasgow, United Kingdom. ⟨10.1145/3136755.3137019⟩
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Online adaptation of an attention-based neural network for natural language generationConference of the International Speech Communication Association (Interspeech), 2017, Stockholm, Sweden
Conference papers
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Optimiser l'adaptation en ligne d'un module de compréhension de la parole avec un algorithme de bandit contre un adversaireJEP, 2016, Paris, France
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ADVERSARIAL BANDIT FOR ONLINE INTERACTIVE ACTIVE LEARNING OF ZERO-SHOT SPOKEN LANGUAGE UNDERSTANDINGICASSP, 2016, shanghai, China
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Automatic Corpus Extension for Data-Driven Natural Language Generation10th International Conference on Language Resources and Evaluation (LREC), 2016, Portorož, Slovenia. pp.3624-3631
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Zero-shot semantic parser for spoken language understandingINTERSPEECH, 2015, Dresden, Germany
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Compréhension automatique de la parole sans données de référenceTALN, 2015, Caen, France
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ONLINE ADAPTATIVE ZERO-SHOT LEARNING SPOKEN LANGUAGE UNDERSTANDING USING WORD-EMBEDDINGICASSP, 2015, Brisban, Australia
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Simulating Human-Robot Interactions for Dialogue Strategy LearningSIMPAR2014, Oct 2014, Bergamo, Italy. pp.62-73, ⟨10.1007/978-3-319-11900-7_6⟩
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Social signal and user adaptation in reinforcement learning-based dialogue managementMLIS '13 Proceedings of the 2nd Workshop on Machine Learning for Interactive Systems: Bridging the Gap Between Perception, Action and Communication , Aug 2013, Beijing, China. ⟨10.1145/2493525.2493535⟩
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Generalization of discriminative approaches for speech language understanding in a multilingual contextInternational COnférence on Statistical Language and Speech Processing (SLSP), 2013, Tarragonna, Spain
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Factored Machine Translation Systems for Russian-EnglishACL 8th Workshop on Statistical Machine Translation (WMT), 2013, Sofia, Bulgaria
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Approches statistiques discriminantes pour l'interprétation sémantique multilingue de la paroleTALN 2013, papier long (oral), 2013, Les Sables d Olonne, France
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Clustering Behaviors Of Spoken Dialogue Systems UsersICASSP 2012, Mar 2012, Kyoto, Japan. pp.4981-4984
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Regroupement non-supervisé d'utilisateurs par leur comportement pour les systèmes de dialogue parléJournées Francophones sur la planification, la décision et l'apprentissage pour le contrôle des systèmes - JFPDA 2012, May 2012, Villers-lès-Nancy, France. 16 p
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Behavior Specific User Simulation in Spoken Dialogue Systems10th ITG Conference on Speech Communication, Sep 2012, Braunschweig, Germany. pp.1-4
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Post-édition statistique pour l'adaptation aux domaines de spécialité en traduction automatique19ème conférence sur le Traitement Automatique des Langues Naturelles (TALN), Jun 2012, Grenoble, France. pp.527-534
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Robustesse et portabilités multilingue et multi-domaines des systèmes de compréhension de la parole : les corpus du projet PortMediaActes de la conférence conjointe JEP-TALN-RECITAL 2012, volume 1: JEP, 2012, Grenoble, France. pp.779--786
Conference papers
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Leveraging study of robustness and portability of spoken language understanding systems across languages and domains: the PORTMEDIA corporaThe International Conference on Language Resources and Evaluation, May 2012, Istanbul, Turkey
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Statistical Post-Editing of Machine Translation for Domain Adaptation16th Annual Conference of the European Association for Machine Translation (EAMT), May 2012, Trento, Italy
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Portability of semantic annotations for fast development of dialogue corporaInterspeech 2012, 2012, Portland, Oregon, United States. pp.x-x
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Co-adaptation in Spoken Dialogue SystemsIWSDS 2012, Nov 2012, Paris, France. pp.1
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User Simulation in Dialogue Systems using Inverse Reinforcement LearningInterspeech 2011, Aug 2011, Florence, Italy. pp.1025-1028
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Comparaison et combinaison d'approches pour la portabilité vers une nouvelle langue d'un système de compréhension de l'oralTALN 2011, papier long (oral), 2011, Montpellier, France. pp.x-x
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Using MMIL for the High Level Semantic Annotation of the French MEDIA Dialogue CorpusNinth International Conference on Computational Semantics - IWCS 2011, ACL, Jan 2011, London, United Kingdom
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Alignement automatique pour la compréhension littérale de l'oral par approche segmentale18ème conférence sur le Traitement Automatique des Langues Naturelles (TALN), Jun 2011, Montpellier, France
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The LIGA machine translation system for WMT 2011EMNLP 2011 SIXTH WORKSHOP ON STATISTICAL MACHINE TRANSLATION , 2011, Edinburgh United Kingdom
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Unsupervised Alignment for Segmental-based Language UnderstandingEMNLP Workshop on Unsupervised Learning in NLP (UNSUP), Aug 2011, Edinburgh, United Kingdom. pp.97-104
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Combination of Stochastic Understanding and Machine Translation Systems for Language Portability of Dialogue SystemsICASSP 2011, 2011, Prague, Tcheque Republic, pp.x-x
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Concept discovery for language understanding in an information-query dialog systemInternational Conference on Knowledge Discovery and Information Retrieval (KDIR'2011), 2011, Paris, France
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Unsupervised Concept Annotation Using Latent Dirichlet Allocation and Segmental MethodsEMNLP Workshop on Unsupervised Learning in NLP (UNSUP), Jul 2011, Edinburgh, United Kingdom. pp.72-81
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Concept Discovery for Language Understanding in an Information-Query Dialogue SystemInternational Conference on Knowledge Discovery and Information Retrieval (KDIR), Oct 2011, Paris, France
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Cross-Lingual Spoken Language Understanding from Unaligned Data using Discriminative Classification Models and Machine TranslationINTERSPEECH, Sep 2010, Makuhari, Japan
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Système du LIA pour a campagne DEFT'10 : datation et localisation d'articles de presse francophonesDéfi Fouille de Texte (DEFT'10), 2010, Montréal (Québec), Région indéterminée
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Investigating multiple approaches for SLU portability to a new languageInterspeech 2010, 2010, Makuhari, Tokyo, Japan. pp.x-x
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Feature-based Summary Space for Stochastic Dialogue Modeling with Hierarchical Semantic FramesINTERSPEECH, Sep 2009, Brighton, United Kingdom
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k-Nearest Neighbor Monte-Carlo Control Algorithm for POMDP-based Dialogue SystemsSIGDIAL '09: the 10th Annual Meeting of the Special Interest Group in Discourse and Dialogue, Sep 2009, Londres, United Kingdom
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Spoken language interpretation: On the use of dynamic Bayesian networks for semantic compositionSpeech and Signal Processing 2009 IEEE International Conference on Acoustics, 2009, Taipei, Taiwan. ⟨10.1109/ICASSP.2009.4960698⟩
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Composition sémantique pour la compréhension de la parole dans le cadre de dialogueJournées d'Etude sur la Parole (JEP), 2008, Avignon, France
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Semantic composition process in a speech understanding systemThe 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Mar 2008, Las Vegas, United States. ⟨10.1109/ICASSP.2008.4518788⟩
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A Bayesian approach to semantic composition for spoken language interpretationInterspeech, 2008, Brisbane, Australia
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Composition sémantique pour la compréhension de la parole dans un cadre de dialogueLes 27e Journées d’Etudes sur la Parole (JEP), Jun 2008, Avignon, France
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DYNAMIC BAYESIAN NETWORKS AND DISCRIMINATIVE CLASSIFIERS FOR MULTI-STAGE SEMANTIC INTERPRETATIONIEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, Apr 2007, Honolulu, United States
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Transformation linéaire discriminante pour l'apprentissage des HMM à analyse factorielleJEP, Jun 2006, Dinard, France
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Discriminant Initialization for Factor Analyzed HMM TrainingIEEE International Conference on Acoustics Speech and Signal Processing Proceedings , May 2006, Toulouse, France. ⟨10.1109/ICASSP.2006.1660013⟩
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A DBN-BASED MULTI-LEVEL STOCHASTIC SPOKEN LANGUAGE UNDERSTANDING SYSTEMIEEE Spoken Language Technology Workshop , Dec 2006, Palm Beach, United States
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The 2004 20xRT BBN/LIMSI English Conversational Telephone Speech System2004 Rich Transcriptions Workshop, Pallisades, NY, 2004, Unknown, Unknown Region
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The 2004 BBN/LIMSI 10xRT English Broadcast News Transcription System2004 Rich Transcriptions Workshop, Pallisades, NY, 2004, Unknown, Unknown Region
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Conversational Telephone Speech RecognitionNo, 2003, Unknown, Unknown Region. pp.212--215
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Application of the MLE algorithm to the K-NN pdf estimationEuropean Conference of Speech Communication and Technology, 1999, Budapest, Hungary. pp.2733-2736
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Influence of the Probability Estimator in a HMM-based SystemAustralian Conference on Speech Science and Technology, Dec 1998, Sydney, Australia. pp.67-72
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Lexique dynamique dans un système de reconnaissance de la paroleCongrés français d'acoustique, Apr 1997, Marseille, France
Conference papers
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K-Nearest Neighbours Estimator in a HMM-Based SystemNATO Advanced Study Institute on Computational Models of Speech Pattern Processing, Jul 1997, St. Helier, Jersey, United Kingdom. pp.96-101, ⟨10.1007/978-3-642-60087-6_10⟩
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Dynamic Lexicon for a Very Large Vocabulary Vocal DictationEUROSPEECH 1997 - Fifth European Conference of Speech Communication and Technology, Sep 1997, Rhodes, Greece. pp.2691-2694
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K-NN Versus Gaussian in HMM-Based Recognition SystemFifth European Conference on Speech Communication and Technology, EUROSPEECH 1997, Sep 1997, Rhodes, Greece. pp.529-532
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The LIGA (LIG/LIA) Machine Translation System for WMT 2011SixthWorkshop on Statistical Machine Translation WMT 2011, 2011, Edinburgh, United Kingdom
Conference poster
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Users' Belief Awareness in Reinforcement Learning-based Situated Human-Robot Dialogue ManagementG.G. Lee, H.K. Kim, M. Jeong, J.-H. Kim. Natural Language Dialog Systems and Intelligent Assistants, Springer International Publishing, pp.73-86, 2015, 978-3-319-19291-8. ⟨10.1007/978-3-319-19291-8_7⟩
Book sections
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Concept Discovery and Automatic Semantic Annotation for Language Understanding in an Information-Query Dialogue System Using Latent Dirichlet Allocation and Segmental MethodsFred A., Dietz J.L.G., Liu K., Filipe J. Knowledge Discovery, Knowledge Engineering and Knowledge Management, 348, Springer, pp.45-59, 2013, Communications in Computer and Information Science, 978-3-642-37185-1. ⟨10.1007/978-3-642-37186-8_3⟩
Book sections
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Système du LIA pour la campagne DEFT2010Grouin and C. ; Forest and D. Expérimentations et évaluations en fouille de textes : Un panorama des campagnes DEFT, Coll. Systèmes d'information et organisations documentaires, Hermès, Chapitre 9, 2012
Book sections
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Media : évaluation de la compréhension dans les systèmes de dialogueStéphane Chaudiron; Khalid Choukri. L'évaluation des technologies de traitement de la langue, les campagnes Technolangue, Hermès, Lavoisier, pp.209-232, 2008, Cognition et traitement de l'information, 978-2746219922
Book sections
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Findings from Experiments of On-line Joint Reinforcement Learning of Semantic Parser and Dialogue Manager with real Users2023
Preprints, Working Papers, ...
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