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  • Research Article
  • Open Access

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

EURASIP Journal on Advances in Signal Processing20022002:897271

https://doi.org/10.1155/S1110865702000471

  • Received: 24 July 2001
  • Published:

Abstract

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.

Keywords

  • cross-spectrum
  • phase spectrum
  • STFT
  • Fourier transform
  • speech
  • formant recovery
  • equalization

Authors’ Affiliations

(1)
R523, U.S. Department of Defense, Ft. Meade, MD 20755, USA

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