Patent Document ID: 9959886
Application ID: 14099892

Base Claim:
1. A method of detecting voice activity in an audible signal, the method comprising: at a voice activity detection system configured to detect voice activity in an audible signal by determining a normalized difference between first and second values generated from a candidate pitch associated with voiced sounds, the voice activity detection system including one or more audio sensors: selecting the candidate pitch from a plurality of predetermined candidate pitches, wherein the plurality of predetermined candidate pitches are generated independent from the audible signal; generating the first value associated with a first plurality of frequencies in the audible signal, wherein each of the first plurality of frequencies is a multiple of the candidate pitch; generating the second value associated with a second plurality of frequencies in the audible signal, wherein each of the second plurality of frequencies is associated with a corresponding one of the first plurality of frequencies; and generating a first voice activity indicator value, associated with the audible signal, as a function of the first value and the second value.

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Claim 11:
11. The method of claim 1 , wherein the plurality of predetermined candidate pitches are included in a frequency range associated with the voiced sounds.