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8th European signal processing Conference, EUSIPCO 1996

作者： Gosselin, Bernard Signal Processing and Circuit Theory Lab Faculte Polytechnique de Mons Bd Dolez 31 MonsB-7000 Belgium

Several methods of combination of Multilayer Perceptrons (MLPs) for handwritten character recognition are presented and discussed. Recognition tests have shown that cooperation of neural networks using different features vectors can reduce significantly the overall misclassification error rate. The final recognition system consists of a cascade association of small MLPs, which allows minimization of the overall recognition time while retaining a high recognition rate. This system appears to be 50% faster than the best of the individual MLPs, while offering a recognition rate of 99.8% on unconstrained digits extracted from the NIST 3 database. © 2015 European signal processing Conference, EUSIPCO. All rights reserved.

关键词： signal processing

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Advanced techniques for vertical tablet playing a overview of two years of practicing the handsketch 1.x 9th

Advanced techniques for vertical tablet playing a overview o...

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9th International conference on New Interfaces for Musical Expression, NIME 2009

作者： D’alessandro, Nicolas Dutoit, Thierry Circuit Theory and Signal Processing Lab Faculty of Engineering Mons [Polytech.Mons 31 Dolez Boulevard Mons7000 Belgium

In this paper we present new issues and challenges related to the vertical tablet playing. The approach is based on a previously presented instrument, the HANDSKETCH. This instrument has now been played regularly for more than two years by several performers. Therefore this is an opportunity to propose a better understanding of the performing strategy. We present the behavior of the whole body as an underlying aspect in the manipulation of the instrument. © 2009 Steering Committee of the International Conference on New Interfaces for Musical Expression. All rights reserved.

关键词： Music

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Enhancing handwritten character images thanks to a RE-sampling process based on convex hull extraction 9

Enhancing handwritten character images thanks to a RE-sampli...

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9th European signal processing Conference, EUSIPCO 1998

作者： Gosselin, B. Signal Processing and Circuit Theory Lab. Faculté Polytechnique de Mons 31 Bd Dolez MonsB-7000 Belgium

In this paper, we propose a new method that allows, by finding the convex hull of a character image, to set out in one pass only, the control parameters of a particular character distortion process. This character distortion method can then be applied to normalize the character image, i.e. to reduce the within-class scatter of images of handwritten characters, which could lead to a significant improvement of recognition performance. Many tests have been performed on unconstrained handwritten uppercase letters extracted from the NIST3 database [1]. Finally, the combination of two classifiers, one using the proposed normalization method, and the other one not, has allow reducing the overall error rate from 5.24% to 3.88%.

关键词： Image enhancement

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Effects of channel estimation error on array processing based QO-STBC coded OFDM systems

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IEEE Communications Letters 2009年第4期13卷 212-214页

作者： Zhang, Haixia Yuan, Dongfeng Chen, Hsiao-Hwa Nossek, Josef A. WMCT Lab. Shandong University Shadong China Department of Engineering Science National Cheng Kung University Tainan City 70101 Taiwan Institute for Circuit Theory and Signal Processing Munich University of Technology Munich Germany

This letter addresses the issues on performance degradation caused by channel estimation error of quasiorthogonal space-time block (QO-STBC) coded OFDM systems employing array processing decoder. The Least Square (LS) channel estimator is employed to obtain the required channel state information (CSI). Taking mean square error (MSE) as a performance metric, we evaluate the performance of the LS estimator in MIMO-OFDM systems over frequency selective channels, and its impact on symbol error rate (SER) using both analysis and simulations. © 2009 IEEE.

关键词： Channel state information

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Reactive accent interpolation through an interactive map application 8

Reactive accent interpolation through an interactive map app...

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8th ISCA Tutorial and Research Workshop on Speech Synthesis, SSW 2013

作者： Astrinaki, Maria Yamagishi, Junichi King, Simon D'Alessandro, Nicolas Dutoit, Thierry Circuit Theory and Signal Processing Lab Numediart Institute University of Mons Belgium The Centre for Speech Technology Research University of Edinburgh Edinburgh United Kingdom National Institute of Informatics Tokyo Japan

MAGE enables the reactive and continuous models modification in the HMM-based speech synthesis framework. Here, we present our first prototype system for extended interpolation applied for interactive accent control. Available accent models for American, Canadian and British English are manipulated in realtime by means of a gesturally controlled interactive geographical map. The accent interpolation is applied to one gender at a time, but the user is able to reactive alter between genders, while controlling the speakers to be interpolated at a time. © SSW 2013. All rights reserved.

关键词： Speech synthesis

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Mage - HMM-based speech synthesis reactively controlled by the articulators 8

Mage - HMM-based speech synthesis reactively controlled by t...

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8th ISCA Tutorial and Research Workshop on Speech Synthesis, SSW 2013

作者： Astrinaki, Maria Moinet, Alexis Yamagishi, Junichi Richmond, Korin Ling, Zhen-Hua King, Simon Dutoit, Thierry Circuit Theory and Signal Processing Lab Numediart Institute University of Mons Belgium The Centre for Speech Technology Research University of Edinburgh Edinburgh United Kingdom National Institute of Informatics Tokyo Japan China

In this paper, we present the recent progress in the MAGE project. MAGE is a library for realtime and interactive (reactive) parametric speech synthesis using hidden Markov models (HMMs). Here, it is broadened in order to support not only the standard acoustic features (spectrum and f0) to model and synthesize speech but also to combine acoustic and articulatory features, such as tongue, lips and jaw positions. Such an integration enables the user to have a straight forward and meaningful control space to intuitively modify the synthesized phones in real time only by configuring the position of the articulators. © SSW 2013. All rights reserved.

关键词： Speech synthesis

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Mage - Reactive articulatory feature control of HMM-based parametric speech synthesis 8

Mage - Reactive articulatory feature control of HMM-based pa...

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8th ISCA Tutorial and Research Workshop on Speech Synthesis, SSW 2013

In this paper, we present the integration of articulatory control into MAGE, a framework for realtime and interactive (reactive) parametric speech synthesis using hidden Markov models (HMMs). MAGE is based on the speech synthesis engine from HTS and uses acoustic features (spectrum and f0) to model and synthesize speech. In this work, we replace the standard acoustic models with models combining acoustic and articulatory features, such as tongue, lips and jaw positions. We then use feature-space-switched articulatory-to-acoustic regression matrices to enable us to control the spectral acoustic features by manipulating the articulatory features. Combining this synthesis model with MAGE allows us to interactively and intuitively modify phones synthesized in real time, for example transforming one phone into another, by controlling the configuration of the articulators in a visual display. © SSW 2013. All rights reserved.

关键词： Speech synthesis

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Multiuser MIMO channel measurements and performance in a large office environment

Multiuser MIMO channel measurements and performance in a lar...

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IEEE Wireless Communications and Networking Conference

作者： Bauch, Gerhard Andersen, Jorgen Bach Guthy, Christian Herdin, Markus Nielsen, Jesper Nossek, Josef A. Tejera, Pedro Utschick, Wolfgang DoCoMo Euro Lab Landsberger Str 308-312 D-80687 Munich Germany Tech Univ Munich Inst Circuit Theory & Signal Processing D-80290 Munich Germany Aalborg Univ Dept Commun Technol Aalborg Denmark

ISBN: (纸本)9781424406586

We consider a multiuser MIMO-OFDMA scheme which exploits multiuser diversity in all dimensions: time, frequency and space. The main contribution of this paper is the evaluation and explanation of multiuser MIMO in a real world scenario, i.e. a large office room, based on measured channels. We report interesting results of a measurement campaign which suggest that significant MIMO gains are possible in an indoor environment even under strong line-of-sight condition as long as the distance of the users from the base station is larger than a reverberation distance which only depends on room surface and material. We show results on the achievable multiuser MIMO data rates for the given scenario, compare to theoretical limits and discuss the results in the light of the insights gained from the measurement campaign. We also introduce restrictions on the rate distribution between users, i.e. QoS constraints. It is shown that the theoretical limits can be approximately achieved provided that the users which compete for the spatial resources are carefully chosen.

关键词： Multiuser detection

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A COMPARATIVE STUDY OF PITCH EXTRACTION ALGORITHMS ON A LARGE VARIETY OF SINGING SOUNDS

A COMPARATIVE STUDY OF PITCH EXTRACTION ALGORITHMS ON A LARG...

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IEEE International Conference on Acoustics, Speech, and signal processing

作者： Onur Babacan Thomas Drugman Nicolas d'Alessandro Nathalie Henrich Thierry Dutoit Circuit Theory and Signal Processing Laboratory University of Mons Belgium Speech and Cognition Department GIPSA-lab Grenoble France

ISBN: (纸本)9781479903573

The problem of pitch tracking has been extensively studied in the speech research community. The goal of this paper is to investigate how these techniques should be adapted to singing voice analysis, and to provide a comparative evaluation of the most representative state-of-the-art approaches. This study is carried out on a large database of annotated singing sounds with aligned EGG recordings, comprising a variety of singer categories and singing exercises. The algorithmic performance is assessed according to the ability to detect voicing boundaries and to accurately estimate pitch contour. First, we evaluate the usefulness of adapting existing methods to singing voice analysis. Then we compare the accuracy of several pitch-extraction algorithms, depending on singer category and laryngeal mechanism. Finally, we analyze their robustness to reverberation.

关键词： singing analysis/synthesis pitch extraction PITCHES pitch Vocal music Singing Voice Ship motion Singer Reverberation large database LARGE gene

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A comparative study of pitch extraction algorithms on a large variety of singing sounds

arXiv

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arXiv 2019年

作者： Babacan, Onur Drugman, Thomas d’Alessandro, Nicolas Henrich, Nathalie Dutoit, Thierry Circuit Theory and Signal Processing Laboratory University of Mons Belgium Speech and Cognition Department GIPSA-lab Grenoble France

关键词： Music

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