Patent ID: 8219390

Claim:
A method for modifying an audio signal with a pitch-based signal component removal device, comprising: detecting a first most prominent pitch associated with the audio signal including: transforming the audio signal into a time frequency domain to generate short time frequency spectra for the audio signal; obtaining a plurality of pitch candidate frequency domain combs associated with a plurality of pitch candidates; performing a cross-correlation in the frequency domain using information associated with the short time frequency spectra and the plurality of pitch candidate frequency domain combs in generating cross-correlation values; and identifying the pitch candidate associated with a first maximum value among the cross-correlation values as the first most prominent pitch; detecting a second most prominent pitch associated with the audio signal by removing cross-correlation values associated with the first most prominent pitch from consideration and identifying the pitch candidate associated with a second maximum value among the remaining cross-correlation values as the second most prominent pitch; and in the event the second most prominent pitch is associated with voice, modifying in the audio signal a portion that is associated with the second most prominent pitch.