Robust F0 Estimation of Speech Signal Using Harmonicity Measure Based on Instantaneous Frequency

Tomohiro TANAKA
Takashi MASUKO

IEICE TRANSACTIONS on Information and Systems   Vol.E87-D    No.12    pp.2812-2820
Publication Date: 2004/12/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Speech and Hearing
instantaneous frequency amplitude spectrum,  harmonicity measure,  fundamental frequency estimation,  

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Borrowing the notion of instantaneous frequency that was developed in the context of time-frequency signal analysis, an instantaneous frequency amplitude spectrum (IFAS) is introduced for estimating fundamental frequency of speech signal in both noiseless and adverse environments. We define harmonicity measure as a quantity that indicates degree of periodical regularity in the IFAS and that shows substantial difference between periodic signal and noise-like waveform. The harmonicity measure is applied to estimate the existence of fundamental frequency. We provide experimental examples to demonstrate the general applicability of the harmonicity measure and apply the proposed procedure to Japanese continuous speech signals. The results show that the proposed method outperforms the conventional methods with or without the presence of noise.