Pitch extraction with inhibition of harmonics and sub-harmonics of the fundamental frequency

摘要

The fundamental frequency of a harmonic signal is estimated by forming a fundamental frequency hypothesis (f0′). A comb filter is provided based on the fundamental frequency hypothesis. The harmonic signal is filtered using the comb filter. The fundamental frequency hypothesis is tested for each tooth in the comb filter. A signal indicating an estimated fundamental frequency of the provided harmonic signal may be outputted based on the testing.