Pitch frequency estimation device and pitch frequency estimation method

摘要

Provided is a pitch frequency estimation device capable of accurately estimating a pitch frequency while reducing an amount of calculation required for pitch frequency estimation. In this apparatus, the spectrum extraction unit (104) extracts a pitch harmonic spectrum from the speech spectrum. The spectrum average value calculation unit (106) calculates the average value of the power of the pitch harmonic spectrum extracted by the spectrum extraction unit (104) in association with each of a plurality of pitch frequency candidates. The estimation unit estimates the pitch frequency using the average value calculated by the spectrum average value calculation unit (106).