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Communication Dans Un Congrès Année : 2021

On the Estimation of Sinusoidal Parameters Via Parabolic Interpolation of Scaled Magnitude Spectra

Résumé

Sinusoids are widely used to represent the oscillatory modes of music and speech. The estimation of the sinusoidal parameters directly affects the quality of the representation. A parabolic interpolation of the peaks of the log-magnitude spectrum is commonly used to get a more accurate estimation of the frequencies and the amplitudes of the sinusoids at a relatively low computational cost. Recently, Werner and Germain [1] proposed an improved sinusoidal estimator that performs parabolic interpolation of the peaks of a power-scaled magnitude spectrum. For each analysis window type and size, a power-scaling factor p is pre-calculated via a computationally demanding heuristic. Consequently, the powerscaling estimation method is currently constrained to a few tabulated power-scaling factors for pre-selected window sizes, limiting its practical applications. In this article, we propose a method to obtain the power-scaling factor p for any window size from the tabulated values. Additionally, we investigate the impact of zeropadding on the estimation accuracy of the power-scaled sinusoidal parameter estimator.
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Dates et versions

hal-03813675 , version 1 (17-10-2022)

Identifiants

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Marcelo Caetano, Philippe Depalle. On the Estimation of Sinusoidal Parameters Via Parabolic Interpolation of Scaled Magnitude Spectra. 2021 24th International Conference on Digital Audio Effects (DAFx), Sep 2021, Vienna, France. pp.81-88, ⟨10.23919/DAFx51585.2021.9768277⟩. ⟨hal-03813675⟩
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