Patent ID: 9305570
Filing Date: 2016-04-05
CPC Classification: G10H,G10L

Claim Text:
1. A method of processing a signal that includes a vocal component and a non-vocal component, said method performed by an apparatus, said method comprising: based on a measure of harmonic energy of the signal in a frequency domain, calculating a plurality of pitch trajectory points, wherein said calculating a plurality of pitch trajectory points includes calculating a value of the measure of harmonic energy for each of a plurality of harmonic basis functions, wherein said plurality includes a plurality of points of a first pitch trajectory of the vocal component and a plurality of points of a second pitch trajectory of the non-vocal component; analyzing changes in a frequency of said first pitch trajectory over time, wherein said analyzing changes comprises measuring a plurality of gradients for each value of the measure of harmonic energy that exceeds a threshold; and based on a result of said analyzing, attenuating energy of the vocal component relative to energy of the non-vocal component to produce a processed signal.