Pitch Estimation for Musical Sound Including Percussion Sound Using Comb Filters and Autocorrelation Function

摘要

This paper proposes a new pitch estimation method using comb filters H(z) = 1-z~(-N) and autocorrelation functions (ACFs) for the musical sounds including a percussion sound. We can obtain the ACF of the percussion sound at the comb filter output where the instrument sound with pitch is eliminated. By subtracting this percussion ACF from the ACF of the adjacent comb filter output in the twelve comb filters connected in parallel corresponding to each pitch of one octave, we can also obtain the ACF of the instrument one, and then we can estimate the pitch of the instrument sound from the instrument ACF.