In this work we describe a mathematical operator for the fast calculation of frequency warping. Such invertible transformation can be used to reshape the tiling of time- frequency analysis in a flexible way. In our approach the warping is computed by splitting the transformation operator in two additive terms: the first term represents its Nonuniform Fourier Transform approximation while the second term is imposed for aliasing suppression. The first transformation is known to be analytically characterized and rapidly computable by interpolation approaches. An analytical characterization of the second transformation operator is proposed for arbitrary shaped non-smooth warping maps commonly used for signal processing applications.

S. Caporale, L. De Marchi, N. Speciale (2008). Fast Operators for Arbitrary Warping Maps. SEATTLE, WA : IEEE [10.1109/ISCAS.2008.4541631].

Fast Operators for Arbitrary Warping Maps

CAPORALE, SALVATORE;DE MARCHI, LUCA;SPECIALE, NICOLO'ATTILIO
2008

Abstract

In this work we describe a mathematical operator for the fast calculation of frequency warping. Such invertible transformation can be used to reshape the tiling of time- frequency analysis in a flexible way. In our approach the warping is computed by splitting the transformation operator in two additive terms: the first term represents its Nonuniform Fourier Transform approximation while the second term is imposed for aliasing suppression. The first transformation is known to be analytically characterized and rapidly computable by interpolation approaches. An analytical characterization of the second transformation operator is proposed for arbitrary shaped non-smooth warping maps commonly used for signal processing applications.
2008
Proceedings of 2008 IEEE International Symposium on Circuits and Systems
1168
1171
S. Caporale, L. De Marchi, N. Speciale (2008). Fast Operators for Arbitrary Warping Maps. SEATTLE, WA : IEEE [10.1109/ISCAS.2008.4541631].
S. Caporale; L. De Marchi; N. Speciale
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/73151
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