Patent ID: 8275141

Claim:
A noise reduction system, comprising: a uni-directional microphone for sensing a first audio source to output a first audio signal, wherein the first audio source is a speech audio source and the first audio signal is similar to speech; an omni-directional microphone for sensing a second audio source to output a second audio signal, wherein the second audio source is a noisy-speech audio source; and a signal processing module, comprising: an adaptive noise control (ANC) unit for executing an adaptive noise control to output an estimated signal according to the first audio signal and the second audio signal, wherein the estimated signal is an estimated speech purer than the first audio signal; a noise reduction unit for executing a noise reduction process to output a de-noise speech signal according to the estimated signal and the second audio signal; and an optimizing unit for executing an optimizing process to output an optimized speech signal according to the de-noise speech signal.