@inproceedings{4c866d9e76d7412facfb4bc1686e3942,
title = "Variational bayes logistic regression as regularized fusion for NIST SRE 2010",
abstract = "Fusion of the base classifiers is seen as a way to achieve high performance in state-of-the-art speaker verification systems. Typically, we are looking for base classifiers that would be complementary. We might also be interested in reinforcing good base classifiers by including others that are similar to them. In any case, the final ensemble size is typically small and has to be formed based on some rules of thumb. We are interested to find out a subset of classifiers that has a good generalization performance. We approach the problem from sparse learning point of view. We assume that the true, but unknown, fusion weights are sparse. As a practical solution, we regularize weighted logistic regression loss function by elastic-net and LASSO constraints. However, all regularization methods have an additional parameter that controls the amount of regularization employed. This needs to be separately tuned. In this work, we use variational Bayes approach to automatically obtain sparse solutions without additional cross-validation. Variational Bayes method improves the baseline method in 3 out of 4 sub-conditions.",
keywords = "Compressed sensing, Linear fusion, Logistic regression, Regularization, Speaker verification",
author = "Ville Hautam{\"a}ki and Lee, {Kong Aik} and Anthony Larcher and Tomi Kinnunen and Bin Ma and Haizhou Li",
note = "Publisher Copyright: {\textcopyright} Odyssey 2012 - Speaker and Language Recognition Workshop. All rights reserved.; Speaker and Language Recognition Workshop, Odyssey 2012 ; Conference date: 25-06-2012 Through 28-06-2012",
year = "2012",
month = jun,
language = "English",
series = "Odyssey 2012 - Speaker and Language Recognition Workshop",
publisher = "Chinese and Oriental Languages Information Processing Society (COLIPS), Speaker and Language Characterization SIG",
pages = "268--274",
editor = "Haizhou Li and Bin Ma and Lee, {Kong Aik}",
booktitle = "Odyssey 2012 - Speaker and Language Recognition Workshop",
}