His domains of interest are distributed multimedia systems, multimedia databases, middleware, and Internet applications. He started research at the #65533;cole Normale Sup#65533;rieure in 1993 during postgraduate study and entered the Ph.D. program in 1994, obtaining his Ph.D. degree in June 1997. He actively participates in the Moving Picture Experts Group (MPEG)-7 and MPEG-21 standardization and is involved in several international research projects in the domain of distributed multimedia systems.