Graduate School and Research Center in Digital Sciences
1975, he was admitted in the Ecole Normale Supérieure, Paris (S75)
1979, he received a PhD in Computer Science from Paris 6 University for his work on Automated Theorem Proving
1992, he was awarded the « Habilitation à Diriger des Recherches » from Paris 7 University for his research on probabilistic language modeling
In 1981, he joined the IBM France Scientific Center in Paris, where he led several research projects on Natural Language Processing and Speech Recognition using probabilistic models.
There he developed PARSYFAL, the first French very large vocabulary speech recognition system.
From 1988 to 1990, he was a Visiting Scientist in the IBM T.J Watson Research Center in Yorktown Heights, N.Y. (USA)