Concept

Robust measures of scale

Publications associées (283)

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On the Adequacy of Baseform Pronunciations and Pronunciation Variants

Hervé Bourlard

This paper presents an approach to automatically extract and evaluate the ``stability'' of pronunciation variants (i.e., adequacy of the model to accommodate this variability), based on multiple pronunciations of each lexicon words and the knowledge of a r ...

IDIAP2004

Noise-Robust Multi-Stream Fusion for Text-Independent Speaker Authentication

Samy Bengio, Norman Hoon Thian Poh

Multi-stream approaches have proven to be very successful in speech recognition tasks and to a certain extent in speaker authentication tasks. In this study we propose a noise-robust multi-stream text-independent speaker authentication system. This system ...

IDIAP2004

Noise-Robust Multi-Stream Fusion for Text-Independent Speaker Authentication

Samy Bengio, Norman Hoon Thian Poh

2004

Phase AutoCorrelation (PAC) features in Entropy based Multi-Stream for Robust Speech Recognition

Hervé Bourlard, Hynek Hermansky, Hemant Misra, Shajith Ikbal

Methods to improve noise robustness of speech recognition systems often result in degradation of recognition performance for clean speech. Recently proposed Phase AutoCorrelation (PAC) \cite{ikbal03,ikbal03a} based features, showing noticeable improvement ...

IDIAP2003

Adapted Generative Models For Face Verification

Samy Bengio

It has been shown previously that systems based on local features and relatively complex generative models, namely 1D Hidden Markov Models (HMMs) and pseudo-2D HMMs, are suitable for face recognition (here we mean both identification and verification). Rec ...

IDIAP2003

Outlier modeling in image matching

Martin Vetterli, Sabine Süsstrunk, Luciano Sbaiz, David Hasler

We address the question of how to characterize the outliers that may appear when matching two views of the same scene. The match is performed by comparing the difference of the two views at a pixel level, aiming at a better registration of the images. When ...

2003

Robust Speaker Change Detection

Hervé Bourlard, Jitendra Ajmera

Most commonly used criteria for speaker change detection like log likelihood ratio (LLR) and Bayesian information criterion (BIC) have an adjustathreshold/penalty parameter to make speaker change decisions. These parameters robust to different acoustic con ...

2003

Multi-Modal Audio-Visual Event Recognition for Football Analysis

Jean-Marc Odobez, Samy Bengio, Mark Barnard

The recognition of events within multi-modal data is a challenging problem. In this paper we focus on the recognition of events by using both audio and video data. We investigate the use of data fusion techniques in order to recognise these sequences withi ...

2003

Robust Speaker Change Detection

Hervé Bourlard, Jitendra Ajmera

IDIAP2002

Computer-intensive statistical methods

Diego Kuonen

The saddlepoint approximation was introduced into statistics in 1954 by Henry E. Daniels. This basic result on approximating the density function of the sample mean has been generalized to many situations. The accuracy of this approximation is very good, p ...

EPFL2001