Patent ID: 11922933
Assignee: YAMAHA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A voice processing method comprising:
collecting a first audio signal collected by a first microphone from a sound source and a second audio signal collected by a second microphone from the sound source;
estimating probability of the first audio signal including a person's voice;
setting a probability value to:
a first probability value indicative of the first audio signal including a person's voice; and
a second probability value of zero indicative of the first audio signal not including a person's voice;

estimating a correlation value of the first audio signal and the second audio signal;
obtaining a time difference between waveforms of the first audio signal and the second audio signal based on the estimated correlation value;
determining that the first audio signal:
includes a person's voice, in a state where the time difference is greater than a predetermined value; and
does not include a person's voice, in a state where the time difference is not greater than the predetermined value;

determining a gain of the first audio signal to be:
from among a range of greater than zero and less than one, in a state where the first probability value is set and the time difference is greater than the predetermined value; and
zero, in a state where the time difference is not greater than the predetermined value;

processing the first audio signal based on the determined gain of the first audio signal to improve an audio quality at a far-end side; and
sending the processed audio signal to the far-end side, where a voice processing device located at the far-end side reproduces the received processed audio signal to emit sound from a speaker.