Patent ID: 9484043
Filing Date: 2016-11-01
CPC Classification: G10L

Claim Text:
1. A method for improving the quality of a voice call over a communication link using a communication device, the communication device having a microphone for receiving a near-end voice signal and a near-end noise signal, the method comprising the steps of: monitoring the noise signal to determine a noise level of a sample of the noise signal in a time domain; monitoring the voice signal to determine a signal level of said sample of the voice signal in said time domain; comparing said noise level to said signal level in said time domain to calculate a difference; assigning a noise confidence parameter, wherein said noise confidence parameter is low when said difference is high and said noise confidence parameter is high when said difference is low; calculating a gain factor, wherein said gain factor is close to 0 when said noise confidence parameter is above a first predetermined threshold and said gain factor is close to 1 when said noise confidence parameter is below a second predetermined threshold and said gain factor increases between 0 and 1 as said noise confidence parameter decreases between said first and second predetermined thresholds; and applying said gain factor to said voice signal to produce an enhanced speech signal; and outputting said enhanced speech signal.