Augustin Lefèvre

Welcome to my research website ! There's as much as you need to read my work and contact me in real life.
picture of me I was a post-doc in the Mathematical Engineering department of Uinversité Catholique de Louvain-la-Neuve. There, I collaborated closely with Pierre-Antoine Absil and François Glineur.
Address: Department of Mathematical Engineering
Bâtiment Euler (P13)
Avenue Georges Lemaître 4 bte L4.05.01
1348 Louvain-la-Neuve
Belgium
E-mail: firstname-dot-lastname-at-polytechnique-dot-org
Resume

Research interests Teaching Publications Demos

Research Interests [top]

Teaching [top]

Publications [top]

Journal articles

A. Lefèvre, F. Glineur, and P.-A. Absil, A convex formulation for informed source separation in the single channel setting , Neurocomputing, 2014, [doi], [preprint]

Articles in peer-reviewed conferences

A. Lefevre, F. Glineur, and P.-A. Absil, A nuclear-norm based convex formulation for informed source separation , in Proc. of ESANN, 2013[audio demos]
A. Lefèvre, F. Bach, and C. Févotte. Itakura-Saito Nonnegative Matrix Factorization With Group Sparsity , in Proc. of the International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2011,[pdf]
A. Lefèvre, F. Bach, and C. Févotte. Online algorithms for Nonnegative Matrix Factorization with the Itakura-Saito divergence , in Proc. IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) 2011,[pdf],[poster]
A. Lefèvre, F. Bach, and C. Févotte. Semi-supervised NMF with time-frequency annotations for single-channel source separation , to appear in Proc. International Conference on Music Information Retrival (ISMIR), 2012 , [code], [pdf]

Workshops

A. Lefè, F. Glineur, First-order methods for low-rank matrix factorization applied to informed source separation , International Workshop on Advances in Regularization, Optimization, Kernel Methods and Support Vector Machines: theory and applications, Leuven, Belgium, July 8 - 10, 2013 [abstract], [slides]
A. Lefèvre, E.S. Selvan, P.-A. Absil, A mixed integer programming approach to the economic load dispatch with valve-point effect and transmission losses , DYSCO bi-annual meeting, Bruxelles, 2013 , [poster]
A. Lefèvre, Online algorithms for Nonnegative Matrix Factorization with the Itakura-Saito divergence , International Traveling Workshop for Interacting Sparse Models and Technology , [poster]

Talks and presentations

Fast algorithms for source separation, Dolomites Research Week on Approximation (DRWA13), September 2013.

Theses and technical reports

A. Lefèvre, Dictionary learning methods for single-channel source separation, Phd Thesis ,[pdf] [slides]

Demos and code [top]

Automatically group components of NMF with group sparse NMF. Feel free to e-mail me if you want to try it out.
[ Online NMF with the Itakura-Saito divergence ]
[ A graphical user interface for manual annotation of time-frequency binary masks for audio source separation ]
Sierra and Willow teams at ENS/INRIA, where I was a PhD student, preparing to go to infinity and beyond !