Accurate estimation in the ODFT domain of the frequency, phase and magnitude of stationary sinusoids

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 expressions 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 (see http://www.inescn.pt//spl sim/ajf/waspaa01/accurate.html).