Alexis Benichoux

Learn More
This paper summarizes the audio part of the 2011 community-based Signal Separation Evaluation Campaign (SiSEC2011). Four speech and music datasets were contributed, including datasets recorded in noisy or dynamic environments and a subset of the SiSEC2010 datasets. The participants addressed one or more tasks out of four source separation tasks, and the(More)
Convolutive source separation is often done in two stages: 1) estimation of the mixing filters and 2) estimation of the sources. Traditional approaches suffer from the ambiguities of arbitrary permutations and scaling in each frequency bin of the estimated filters and/or the sources, and they are usually corrected by taking into account some special(More)
A fundamental pitfall in blind de-convolution with sparse and shift-invariant priors. HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research(More)
This paper summarizes the bio part of the 2011 community based Signal Separation Evaluation Campaign (SiSEC2011). Two different data sets were given. In the first task, participants were asked to estimate the causal relations of underlying sources from simulated bivari-ate EEG data. In the second task, participants were asked to reconstruct signaling(More)
– On s'intéresse à l'estimation de réponses acoustiques à partir de l'enregistrement simultané de plusieurs sources connues. Les techniques existantes nécessitent de pouvoir se ramener au cas où le nombre de sources, connues ou inconnues, est au plus égal au nombre de capteurs. Notre méthode s'affranchit de cette hypothèse dans le cas où les sources sont(More)
We propose a new matrix recovery framework to partition brain activity using time series of resting-state functional Magnetic Resonance Imaging (fMRI). Spatial clusters are obtained with a new low-rank factorization algorithm that offers the ability to add different types of constraints. As an example we add a total variation type cost function in order to(More)