Patent ID: 9699549
Date: 2017-07-04
CPC Classifications: G10L,H03G,H04R

Claim:
1. An audio capturing enhancement method comprising: recording an audio data by using at least two microphones; adjusting the audio data by applying automatic gain control (AGC) in order to generate a gain adjusted data that is within a predefined level; calculating a linear predictive coding (LPC) residue of the gain adjusted data; defining a cone having an angle of acceptance and a maximum distance relative to the at least two microphones; after calculating the LPC residue of the gain adjusted data and the cone has being defined, determining, from the LPC residue, a first source at a first direction and a second source at a second direction within the defined cone based on time different of arrival (TDOA), wherein the first and second directions are relative to the at least two microphones; attenuating any source at a third direction that is outside of the defined cone; identifying the first source as the dominate source over the second source through a correlation of LPC residues of the at least two microphones; enabling voice activated detection to determine whether the first source is a human voice if the first source is identified as the dominate source among the first and second sources; and eliminating the first source from the audio data if the first source is not a human voice.