MULTICHANNEL FILTER FOR ENHANCEMENT OF SPEECH BLOCKS

Ivandro Sanches

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Paper

MULTICHANNEL FILTER FOR ENHANCEMENT OF SPEECH BLOCKS

Topics: Speech Recognition

In Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO, 272-276, 2007 , Angers, France

Author: Ivandro Sanches

Affiliation: Genius Instituto de Tecnologia, Brazil

Keyword(s): Speech, noise, microphone array.

Related Ontology Subjects/Areas/Topics: Informatics in Control, Automation and Robotics ; Signal Processing, Sensors, Systems Modeling and Control ; Speech Recognition

Abstract: This work presents the concepts and the achieved results of a proposed microphone array algorithm based on multi-dimensional Wiener filter developed to work on blocks of speech. The inputs to the algorithm are two correlation matrices: the correlation matrix of the background noise affecting the desired signal and the correlation matrix of the signal affected by the noise. Experiments show that improvements of more than 12dB on signal to noise ratio can be achieved when comparing the filtered signals with one of the microphone array channels. In order to save computational load, the input signal is processed in blocks of a specified size and a technique is proposed to reduce blocking effects on the output filtered signal. It will be shown that practically there are no blocking effects. It is also shown that the technique is independent of the array physical configuration.

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Paper citation in several formats:

Sanches, I. (2007). MULTICHANNEL FILTER FOR ENHANCEMENT OF SPEECH BLOCKS. In Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO; ISBN 978-972-8865-84-9; ISSN 2184-2809, SciTePress, pages 272-276. DOI: 10.5220/0001625202720276

@conference{icinco07,
author={Ivandro Sanches.},
title={MULTICHANNEL FILTER FOR ENHANCEMENT OF SPEECH BLOCKS},
booktitle={Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO},
year={2007},
pages={272-276},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001625202720276},
isbn={978-972-8865-84-9},
issn={2184-2809},
}

TY - CONF

JO - Proceedings of the Fourth International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO
TI - MULTICHANNEL FILTER FOR ENHANCEMENT OF SPEECH BLOCKS
SN - 978-972-8865-84-9
IS - 2184-2809
AU - Sanches, I.
PY - 2007
SP - 272
EP - 276
DO - 10.5220/0001625202720276
PB - SciTePress