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Primeira versão de um template de dissertação/tese de mestrado/doutorado para UNIFEI.
Modelo baseado no trabalho de Lauro César Araújo, disponível em : http://www.abntex.net.br/
There are several voice communication systems that are used nowadays which are capable of maintain voice calls between two users in real time. Telephones are widely used all around the world in an unlimited kind of situations. All of these situations expose the microphone (or microphones) of the phones to different and unpredictable noises, as street noise, sea noise, rain noise, wind noise, unwanted voices, car motors, etc. As microphones capture all the sounds around it, including the wanted voice and the unwanted noises, it is necessary to implement digital real time filters capable of attenuate as much as possible all the surrounding noises.
It exists a large quantity of noise reduction methods that have been used in the calling algorithms of phones. Even if these methods have had, in general, a good performance, there is still a research being done in this area in order to improve the current results. Because of this, the multichannel methods were created (using multiple microphones) as well as new algorithms that pretend to have a better noise reduction than the single channel methods. Most of these methods require a speech presence probability (SPP) method to achieve the noise reduction.
The following document presents a research about different SPP methods as well as a comparison between these. This includes an explanation on how theses algorithm work, a Matlab implementation using real voice and noise recordings and objective tests of the filter.
This template can be used to write theses at Massey University. More info about this template please refer to https://www.io.ac.nz
Licensed under CC-BY-SA-4.0
This document is a template for typesetting a paper in a BeLLS volume. It has guidelines and provides examples of various text elements, showing how to produce them. The paper should preferably be delivered in PDF, without page numbers. The editors will collate all contributions and apply page numbering in the footer throughout the volume.
Ukázkový text a dokumentace stylu pro text závěrečné (bakalářské a
diplomové) práce na KI PřF UP v Olomouci
Copyright (C) 2012 Martin Rotter, <rotter.martinos@gmail.com>
Copyright (C) 2014 Jan Outrata, <jan.outrata@upol.cz>
Martin Rotter, Jan Outrata
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