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An Exploratory Study of the Effect of Demodulation on Pitch Detection


Pitch (F0) detection has been a very active research topic in recent years. Accurate F0 detection is very important in applications such as speech recognition and coding. This work examines the effects of demodulating a signal into its modulator and carrier parts, each bearing low and high frequency content of the signal respectively, on pitch detection accuracy. Since the carrier part is known to contain the high frequency pitch content of a speech signal, using it as an input to pitch detection algorithms proves to be beneficial in most of the tests carried out with different speakers, and under different noise levels.

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