Accurate Estimation in the ODFT Domain of the Frequency, Phase and Magnitude of Stationary Sinusoids

Anibal J. S. Ferreira

To appear at Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA01), Mohonk Mountain Resort, NY, 21-24 October 2001


This paper addresses the extraction of parametric information in an audio coder that uses the MDCT filter bank. The computation of the filter bank is reformulated as a function of the Odd-DFT, in order to allow the estimation of the frequency, the phase and the magnitude of stationary sinusoids. Closed expression delivering accurate estimates are derived and explained, and their implementation and accuracy are illustrated in a Web page that includes a demonstration Matlab M-file.

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