Pitch determination using the cepstrum of the one-sided autocorrelation sequence

A novel cepstral function, the cepstrum (CEP) of the one-sided autocorrelation sequence (COSA), is presented and applied to pitch determination of speech signals. This pitch determination algorithm (PDA) starts from the autocorrelation sequence in lieu of the speech signal. Although the COSA pitch determination algorithm does not improve the performance of the autocorrelation-with-center-clipping and CEP algorithms in quasiperiodic speech frames, it significantly reduces their pitch-period errors at transitional speech segments as well as in speech signals contaminated by noise. The PDA´s better performance is based on its accuracy at nonstationary segments of speech signals and its noise capability