The Phase Vocoder: A Tutorial

Dolson, Mark

doi:10.2307/3680093

Cited by 164 publications

(88 citation statements)

References 10 publications

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“…As modificações temporais se referem à contração ou dilatação da duração do som de entrada e as modificações frequenciais se referem à transposição do espectro inicial para regiões mais agudas ou mais graves (MOORER, 1978. DOLSON, 1986.…”

Section: O Phase Vocoder E Seu Modelo Source-filterunclassified

De Montserrat às ressonâncias do piano: uma análise com descritores de áudio

Rossetti

Manzolli

2017

Opus

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Section: O Phase Vocoder E Seu Modelo Source-filterunclassified

De Montserrat às ressonâncias do piano: uma análise com descritores de áudio

Rossetti

Manzolli

2017

Opus

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“…This result is true even for high quality techniques developed in the speech context such as the phase vocoder [5] and sine-wave analysis/synthesis [6,7]. Loss of temporal resolution results from windowing the signal during analysis and dispersing the phase during synthesis.…”

Section: Introductionmentioning

confidence: 99%

“…Each filter output ykf(n) is complex [each filter response hk(n) in Equation (1) is complex] so that the temporal envelope of the output of the kth channel is ak(n) = Iyk(n)I , (5) and the phase of each bandpass output is…”

Section: Subband Representationmentioning

confidence: 99%

“…In addition, current methods of time-scale modification can introduce artifacts into the background, e.g., unwanted tonality or "gurgles." This effect can be due to excessive correlation of sine-wave components in time [6,71 or spectral corruption in frequency [5]. This report introduces a new approach for time-scale modification of complex acoustic signals where the object consists of sums of sequential, rapidly damped sine waves.…”

Section: Introductionmentioning

confidence: 99%

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Time-Scale Modification of Complex Acoustic Signals in Noise

Quatieri¹,

Dunn²,

McAulay³

et al. 1994

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Approved for public release; distribution is unlimited. , ni:,y 1w rep oduced to satisfy needs of U.S. Government agencies. EXINGTON MASSACHUSETTS'he ESC i•ublic Affairs Office has reviewed this report, and it is releasable to the NationalTechnical Information Service, where it will be available to the general public, including ioreigo nationals.This techtical report has beýn reviewed and is approved for publication.

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“…(1) If the frequency sampling is dense enough and g has support inside an interval I, with the length ≤ n b , then S is a diagonal matrix. (2) If the time sampling is dense enough andĝ has compact support on an interval with length ≤ n a , thenŜ is diagonal and therefore S is circulant. In both cases it is easy to find the inverse matrix [12].…”

mentioning

confidence: 99%

Double Preconditioning for Gabor Frames

Balázs

Feichtinger

Hampejs

et al. 2006

IEEE Trans. Signal Process.

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Abstract-We present an application of the general idea of preconditioning in the context of Gabor frames. While most (iterative) algorithms aim at a more or less costly exact numerical calculation of the inverse Gabor frame matrix, we propose here the use of "cheap methods" to find an approximation for it, based on (double) preconditioning. We thereby obtain good approximations of the true dual Gabor atom at low computational costs. Since the Gabor frame matrix commutes with certain timefrequency shifts it is natural to make use of diagonal and circulant preconditioners sharing this property. Part of the efficiency of the proposed scheme results from the fact that all the matrices involved share a well-known block matrix structure. At least, for the smooth Gabor atoms typically used, the combination of these two preconditioners leads consistently to good results. These claims are supported by numerical experiments in the second part of the paper. For numerical evaluations we introduce two new matrix norms, which can be calculated efficiently by exploiting the structure of the frame matrix.Index Terms-Block matrices; efficient algorithm; Gabor frame matrices; approximated dual windows; time-frequency analysis; matrix norms; discrete transforms; matrix inversion; EDICS : DSP-WAVL Wavelets theory and applications; DSP-FAST Fast algorithms for digital signal processing

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The Phase Vocoder: A Tutorial

Cited by 164 publications

References 10 publications

De Montserrat às ressonâncias do piano: uma análise com descritores de áudio

De Montserrat às ressonâncias do piano: uma análise com descritores de áudio

Time-Scale Modification of Complex Acoustic Signals in Noise

Double Preconditioning for Gabor Frames

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