Patent ID: 9466311
Filing Date: 2016-10-11
CPC Classification: G10L,H04R

Claim Text:
1. An audio signal processing circuit, applicable for processing a first input audio signal and a second input audio signal received from a first microphone and a second microphone respectively, the audio signal circuit comprising: a noise detection circuit, for determining if the first input audio signal and the second input audio signal contain noise higher than a tolerance noise level, wherein when the first input audio signal and the second input audio signal contain the noise, the noise detection circuit detects the noise to generate a noise detection signal; a noise cancellation circuit, wherein (i) when the noise detection signal is negated, the noise cancellation circuit outputs a first intermediate audio signal corresponding to the first input audio signal and a second intermediate audio signal corresponding to the second input audio signal; (ii) when the noise detection signal is affirmed, the noise cancellation circuit generates a third intermediate audio signal after performing a specific noise modification process upon the first input audio signal and the second input audio signal, and outputs the first intermediate audio signal comprising the third input audio signal, and the second intermediate audio signal comprising the third input audio signal; and a beamforming circuit, for receiving the first intermediate audio signal and the second intermediate audio signal outputted from the noise cancellation circuit, and performing a beamforming process in accordance with a differential signal between the first intermediate audio signal and the second intermediate audio signal.