Modified Method for Fundamental Frequency Detection of Voiced/Unvoiced Speech Signal in Noisy Environment

Md. Arifur Rahman, Md. Mahfuz Alam, Md. Firoz Ahmed, M. A. F. M. Rashidul Hasan


An efficient fundamental frequency detection method is introduced in this paper. The method is based on time domain fundamental frequency detection method. In our proposed method, instead of the original speech signal, we employ its center clipping signal for obtaining the modified autocorrelation function and this function is weighted by the reciprocal of the average magnitude difference function for fundamental frequency detection. The performance of the proposed fundamental frequency detection method is compared in terms of gross pitch error and fine pitch error with the other related method. A comprehensive evaluation of the fundamental frequency estimation results on female and male voices in white noise show the superiority of the proposed method over three related method under low levels of signal to noise ratio (SNR).


Fundamental frequency, Pitch, Center Clipping, White Noise.

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