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Open Access

Applications of Surface Correlation to the Estimation of the Harmonic Fundamental of Speech

EURASIP Journal on Advances in Signal Processing20022002:897271

Received: 24 July 2001

Published: 14 January 2002


We present a method for estimating the fundamental frequency of harmonic signals, and apply this method to human speech. The method is based on cross-spectral methods, which provide accurate resolution of multicomponent FM signals in both time and frequency. The fundamental is re-introduced to the spectrum by a frequency-lag autocorrelation of the spectrum, even if the fundamental is completely missing in the original spectrum. By combining the different perspectives of the Fourier spectral representation and the time-lag autocorrelation function we suppress all components of harmonic signals except for the fundamental.


cross-spectrumphase spectrumSTFTFourier transformspeechformant recoveryequalization

Authors’ Affiliations

R523, U.S. Department of Defense, Ft. Meade, USA


© Nelson 2002