Patent ID: 9002030
Filing Date: 2015-04-07
Classification: G10L,H04M

Abstract:
1. A method for Voice Activity Detection (VAD), the method comprising the steps of: producing a microphone signal including speech and ambient noise by a microphone; providing the microphone signal to noise suppression processing; processing the microphone signal in the noise suppression processing to generate an ambient noise estimate, comprising: providing the ambient noise estimate to threshold calculation; calculating a threshold as the square root and mean of the noise estimates; provided the threshold to the VAD logic; computing a noise suppressed signal from the microphone signal and the ambient noise estimate by the noise suppression processing, comprising: comparing the noise suppressed signal to the threshold in the VAD logic; setting a VAD signal to 0 when the noise suppressed signal is below the threshold; and setting a VAD signal to 1 when the noise suppressed signal is above the threshold.