Research Interests

  • Hidden Markov Models (HMM) for Image and Speech processing
  • Speech recognition
  • HMM Speech synthesis (HTS)
  • Voice Conversion
  • Signal and Image Segmentation
  • Data fusion




CV: English / French

Professional Experiences

Jan 2010 - Jun2011:
Researcher and developer in FEDER AngelStudio project:
IRCAM, Paris, France

  • Research on Voice Conversion (Dynamic Model Selection) and development of a system based on GMM modeling of the joint distribution of source and target acoustic features.
  • Implementation of a one-to-many voice conversion system based on a canonical eigenvoice model estimated by SAT for fast Adaptation.
  • The aim of VC in this project is to convert the voice of a commercial TTS to the voice of the user using few sentences.
  • Research and development of a HMM-based speech synthesis system for French based on HTS with high level syntactical features with N. Obin

Jul 2008 - Jan 2010:
Researcher and developer in ANR Affective Avatars project:
IRCAM, Paris, France

  • Research on Voice conversion (reduction of the conditional variance) and development of a Voice conversion system based on GMM modeling of the joint density of source and target acoustic features.
  • Research and development of a HMM-based speech synthesis system for French based on HTS including a new excitation model (SVLN) proposed by G. Degottex

Jan 2007 - Jun 2008:
Researcher and developer in ANR VIVOS project:
IRCAM, Paris, France

  • Research and development of a speech segmentation system based on HTK and on the french phonetizer LIAPHON to automatically extract the language structure at different levels (phone, word, phrase, paragraph) and to align it on the speech audio signal.
  • Multiple pronunciation are taking into account during the alignment using a constrained phonetic graph build from the text.
  • A confidence measure is computed for manual correction.
  • The aligned linguistic structure was used in the project by ircamCorpusTools, a corpus manager tool similar to festival, which was developed for Unit selection TTS.

Sep 2005 - Sep 2006:
Teaching assistant (ATER) for Master's degree students:
Paris XI University, Orsay, France

  • Teaching: C language, UNIX, numerical analysis, multimedia (coding), system and network, final projects supervision.

Sep 2002 - Sep 2005:
Teaching assistant for Master's degree students:
Institut National des telecommunications, Evry, France

  • Teaching: Introduction to Statistics, algorithmic and C language, statistical methods in Image processing, final projects supervision.

Sep 2002 - Dec 2002:
Invited researcher:
Ocean Systems Laboratory, Heriot-Watt University, Edinburgh

  • Study and evaluation of SONAR images segmentation algorithm.

Mar 2002 - Sep 2002:
Statistical RADAR image segmentation internship:
TBU Radar Development, THALES Air Defence, Bagneux, France

  • Study of statistical radar image segmentation algorithm in the application field of Doppler cartography in order to reduce false alarm in RADAR detection.

Mar 2001 - Sep 2001:
Non-linear Mechanics internship:
UER de Mécanique, ENSTA Palaiseau, France

  • Analytical and numerical study of the temporal response of a circular plate involving a set of internal resonances in the context of non linear vibration.

Jan 2000 - Mar 2000:
Non-linear Optics internship:
Photonics and nanostructure laboratory, CNET Bagneux, France

  • Simulation of the propagation of a gaussian beam in a non-linear medium (C++)

Education

2002-2006:
Phd in Statistical Signal Processing
Institut National des télécommunications, Evry, France.

  • Title "Triplet Markov chains and Unsupervised signal segmentation"
  • Director: Wojciech Pieczynski.
  • With honors (mention très honorable)
  • Keywords: Hidden Markov Models, Pairwise and triplet Markov chains and trees, Bayesian estimation, Expectation-maximisation, non-stationary process segmentation, centered gaussian process with long memory noise, Dempster-shafer theory, SAR image segmentation.

2001-2002:
DEA OSS: Master's Degree in System optimization and safety
Institut National des télécommunications, Evry, France.

  • Major: signal processing and decision theory.
  • With honors (mention B)
  • Keywords: Logistic, Risk management, System diagnostic, Decision theory in Signal and Image.

2000-2001:
DEA ATIAM: Master's Degree in Acoustics, Signal Processing and Computer science applied to Music
Paris VI University/IRCAM, Paris, France

  • With honors (mention AB)
  • Keywords: Acoustics(general and musical), Audio-numerical signal processing, Computer Science for Music.

2000-2002:
Ingénieur Telecom INT: Master's Degree in Telecommunications (french Grande Ecole)
Institut National des télécommunications, Evry, France.

  • With honors
  • Keywords: Signal processing, Computer Science, Probability and statistics, graph optimization, numerical analysis, Information theory, numerical communication, optical communications, Network-TCP/IP, major in statistical image processing during the last year.

1995-2000:
Deug, licence and maitrise de Physique: Bachelor and first year of Master of Science in Physics
Evry-val-d'Essonne University, Evry, France

  • With honors (mention AB)
  • Keywords: Statistical Physics, Optics, Electromagnetism, Relativity, Quantum Mechanics, Electronics, Numerical Analysis

1995-1997:
Audio engineer diploma
School of Audio Engineering Institute, SAE Paris, France

  • a two years degree in sound audio technics
  • Keywords: studio and live recording technics, sonorisation, Acoustics, mastering.

1989-1995:
Secondary education

  • General education in Sciences