Patent ID: 9558755
Date: 2017-01-31
CPC Classifications: G10L

Claim:
1. A method for processing an audio signal, comprising: generating sub-band signals from a received primary acoustic signal and a received secondary acoustic signal; determining two or more features for the sub-band signals, the two or more features including a speech energy level for the sub-band noise level and at least one of the following: inter-microphone level differences, inter-microphone time differences, and inter-microphone phase differences between the primary acoustic signal and the secondary acoustic signal; suppressing a noise component in the primary acoustic signal based on the two or more features, the suppressing configured to clean the primary acoustic signal to create a cleaned speech signal optimized for accurate speech recognition processing by an automatic speech recognition processing module, the suppressing comprising: providing the cleaned speech signal and corresponding noise suppression information to the automatic speech recognition processing module, the noise suppression information based on the two or more features and including a voice activity detection signal.