Concept

Hydrophone

Publications associées (44)

Multiple harmonic sound sources separation in the under-determined case based on both goniometric and beamforming approaches

Hervé Lissek, Xavier Falourd, Patrick Marmaroli

Usually acoustic beamformer or directive microphones are used in order to focus on known potential locations emitting sounds so as to identify and extract their major noise components. However performances of these techniques depend on the number of microp ...

2009

Spatio-Temporal Gradient Analysis of Differential Microphone Arrays

Martin Vetterli, Mihailo Kolundzija, Christof Faller

The literature on gradient and differential microphone arrays makes a distinction between the two types, and nevertheless shows how both types can be used to obtain the same directional responses. A more theoretically sound rationale for using delays in di ...

2009

Neural Network based Regression for Robust Overlapping Speech Recognition using Microphone Arrays

Hervé Bourlard, John David Scott Dines, Weifeng Li

This paper investigates a neural network based acoustic feature mapping to extract robust features for automatic speech recognition (ASR) of overlapping speech. In our preliminary studies, we trained neural networks to learn the mapping from log mel filter ...

IDIAP2008

Spatio-temporal analysis of spontaneous speech with microphone arrays

Guillaume Lathoud

Accurate detection, localization and tracking of multiple moving speakers permits a wide spectrum of applications. Techniques are required that are versatile, robust to environmental variations, and not constraining for non-technical end-users. Based on di ...

EPFL2007

Audio-visual probabilistic tracking of multiple speakers in meetings

Daniel Gatica-Perez, Jean-Marc Odobez, Guillaume Lathoud

Tracking speakers in multiparty conversations constitutes a fundamental task for automatic meeting analysis. In this paper, we present a probabilistic approach to jointly track the location and speaking activity of multiple speakers in a multisensor meetin ...

2006

Acoustic node calibration using moving sources

Volkan Cevher

Acoustic nodes, each containing an array of microphones, can track targets in x-y space from their received acoustic signals, if the node positions and orientations are known exactly. However, it is not always possible to deploy the nodes precisely, so a c ...

Institute of Electrical and Electronics Engineers2006

Spatio-Temporal Analysis of Spontaneous Speech with Microphone Arrays

Guillaume Lathoud

IDIAP2006

Spatio-Temporal Analysis of Spontaneous Speech with Microphone Arrays

Guillaume Lathoud

École Polytechnique Fédérale de Lausanne2006

Speaker Localization for Microphone Array-Based ASR: The Effects of Accuracy on Overlapping Speech

Daniel Gatica-Perez

Accurate speaker location is essential for optimal performance of distant speech acquisition systems using microphone array techniques. However, to the best of our knowledge, no comprehensive studies on the degradation of automatic speech recognition (ASR) ...

2006

Speaker Localization for Microphone Array-Based ASR: The Effects of Accuracy on Overlapping Speech

Daniel Gatica-Perez

IDIAP2006

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