Title :
Accurate estimation in the ODFT domain of the frequency, phase and magnitude of stationary sinusoids
Author :
Ferreira, Anibal J S
Author_Institution :
Sch. of Eng., Porto Univ., Portugal
Abstract :
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/~ajf/waspaa01/accurate.html)
Keywords :
amplitude estimation; audio coding; channel bank filters; discrete Fourier transforms; discrete cosine transforms; frequency estimation; phase estimation; audio coder; closed expressions; filter bank; frequency estimation; magnitude estimation; modified DCT; odd-DFT; parametric information; phase estimation; stationary sinusoids; Data mining; Discrete transforms; Filter bank; Frequency domain analysis; Frequency estimation; Information analysis; Phase estimation; Signal analysis; Signal resolution; Web pages;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 2001 IEEE Workshop on the
Conference_Location :
New Platz, NY
Print_ISBN :
0-7803-7126-7
DOI :
10.1109/ASPAA.2001.969539
