SOUND ANALYSIS AND SYNTHESIS ADAPTIVE IN TIME AND TWO FREQUENCY BANDS
| Autor: | Liuni, M., Peter Balazs, Röbel, A. |
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| Přispěvatelé: | Institut de Recherche et Coordination Acoustique/Musique (IRCAM), Dipartimento di Matematica 'Ulisse Dini', Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Acoustic Research Institute (ARI), Austrian Academy of Sciences (OeAW) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Proc. of the 14th Int. Conference on Digital Audio Effects (DAFx-11) Proc. of the 14th Int. Conference on Digital Audio Effects (DAFx-11), Sep 2011, Paris, France. pp.107-113 Scopus-Elsevier |
| Popis: | International audience; We present an algorithm for sound analysis and resynthesis with local automatic adaptation of time-frequency resolution. There exists several algorithms allowing to adapt the analysis window depending on its time or frequency location; in what follows we propose a method which select the optimal resolution depending on both time and frequency. We consider an approach that we denote as analysis-weighting, from the point of view of Gabor frame theory. We analyze in particular the case of different adaptive time- varying resolutions within two complementary frequency bands; this is a typical case where perfect signal reconstruction cannot in general be achieved with fast algorithms, causing a certain error to be minimized. We provide examples of adaptive analyses of a music sound, and outline several possibilities that this work opens. |
| Databáze: | OpenAIRE |
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