EUROSPEECH 2001 Scandinavia

This paper presents a novel lowcomplexity method for extracting periodicity of signals based on their sinewave representation. In this representation, the signal is modeled as a finite sum of sinewaves, with timevarying amplitudes, phases and frequencies. We describe how one can modify the familiar spectralcomb analysis method to obtain a guaranteed and effective procedure to find the fundamentalfrequency which gives the best harmonic approximation of the signal spectrum. The search is efficiently carried out in the frequency domain. The procedure obtains a successive refinement of possible pitch values which are consistent with an increasing number of sine wave components. Other pitch intervals are pruned at an early stage of the search. The advantage of this algorithm is its high accuracy achieved at a relatively low complexity. We also briefly describe one possible application in the area of pitch determination of speech signals.
Bibliographic reference. Chazan, Dan / Tzur, Meir (Zibulski) / Hoory, Ron / Cohen, Gilad (2001): "Efficient periodicity extraction based on sinewave representation and its application to pitch determination of speech signals", In EUROSPEECH2001, 24272430.