InforLorV4, Main, Merge, bibRecord, 008E51

Un Algorithme de Réduction de la Réverbération de Signaux Issus du Vocoder de Phase

Identifieur interne : 008E51 ( Main/Merge ); précédent : 008E50; suivant : 008E52

Un Algorithme de Réduction de la Réverbération de Signaux Issus du Vocoder de Phase

Auteurs : Joseph Di Martino [France] ; Yves Laprie [France]

Source :

RBID : Hal:inria-00099413

Descripteurs français

mix :
- phase vocoder, reduction of phasiness, réduction de la réverbération, vocodeur de phase.

Abstract

Time-Scale modifications of speech signals, based on frequency-domain techniques are hampered by an important artifact called phasiness. This artifact corresponds to the destruction of the shape of the original signal, i.e. the de-synchronisation between the phases of frequency components. This paper describes an algorithm that preserves the shape invariance of speech signals in the context of the phase vocoder. At ICASSP'2001 we presented a first version of this work where phases were corrected at the onsets of the voiced portions of the speech signals. In this study, we extended the previous work by allowing the algorithm to synchronize and correct the phases at regular intervals of the voiced segments of speech signals. Due to our algorithm, modified signals, even for large expansion factors, are of high quality and almost exempt of phasiness. A demonstration is proposed at the web page: http://www.loria.fr/\~jdm/PhaseVocoder/index.html where several audio files can be down-loaded.

Url:

https://hal.inria.fr/inria-00099413

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 006748
to stream Hal, to step Curation: 006748
to stream Hal, to step Checkpoint: 005774

Links to Exploration step

Hal:inria-00099413

Le document en format XML

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<front><div type="abstract" xml:lang="en">Time-Scale modifications of speech signals, based on frequency-domain techniques are hampered by an important artifact called phasiness. This artifact corresponds to the destruction of the shape of the original signal, i.e. the de-synchronisation between the phases of frequency components. This paper describes an algorithm that preserves the shape invariance of speech signals in the context of the phase vocoder. At ICASSP'2001 we presented a first version of this work where phases were corrected at the onsets of the voiced portions of the speech signals. In this study, we extended the previous work by allowing the algorithm to synchronize and correct the phases at regular intervals of the voiced segments of speech signals. Due to our algorithm, modified signals, even for large expansion factors, are of high quality and almost exempt of phasiness. A demonstration is proposed at the web page: http://www.loria.fr/\~jdm/PhaseVocoder/index.html where several audio files can be down-loaded.</div>
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Un Algorithme de Réduction de la Réverbération de Signaux Issus du Vocoder de Phase

Un Algorithme de Réduction de la Réverbération de Signaux Issus du Vocoder de Phase

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