Patent ID: 8744091
Filing Date: 2014-06-03
Classification: G10L,H04M

Abstract:
1. A method for modifying intelligibility of speech in a downlink voice signal during a call, comprising: computing a current noise level estimate based on a) sampling ambient acoustic noise during the call, and b) a previously estimated noise level, by 1) calculating a delta noise based on the sampled ambient acoustic noise and based on the previously estimated noise level, 2) determining a slew rate. 3) calculating a slew delta by multiplying the slew rate and a noise sampling period, and 4) selecting the sampled ambient acoustic noise to be the current noise level estimate when the delta noise does not exceed the slew delta; determining an overall output gain based on the current noise level estimate and based on a user-selected volume setting; determining a frequency response based on the current noise level estimate and based on the user-selected volume setting; and modifying the downlink voice signal during the call in accordance with the overall output gain and the frequency response.