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Transient detection and preservation in the phase vocoder

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text
 

Genre(s)

article
 

Forme(s)

document numérique
 

Cette ressource est disponible chez l'organisme suivant : Ircam - Centre Pompidou

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Titre

Transient detection and preservation in the phase vocoder
 

Nom(s)

Roebel, Axel (auteur)
 

Publication

Singapore, Singapore , 2003
 

Description

Sujet(s)

transient detection   phase vocoder
 

Résumé

In this paper we propose a new method to reduce phase vocoder artifacts during attack transients. In contrast to existing algorithms the new approach does not enforce the time dilation parameter to one during transient segments and works at the level of spectral peaks such that stationary parts of the signal will not be affected by detected transients. For transient detection we propose a new algorithm that is especially adapted for phase vocoder applications because its detection criterion may be interpreted in terms of transient position and and allows us to chose the optimal location for phase reinitialization. The evaluation of the transient detection shows superior performance compared to a previously published algorithm. Attack transients in sound signals transformed with the new algorithm provide very high quality even if strong dilation is applied to polyphonic signals.
 

Note(s)

Contribution au colloque ou congrès : International Computer Music Conference (ICMC)
 

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Date de la notice

2010-02-25 01:00:00
 

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