| 主权项 |
1. A method for generating a noise reduced output signal from sound received by a first microphone, said method comprising:
transforming said sound received by said first microphone into a first input signal, wherein said first input signal is a frequency domain signal of an analog-to-digital converted audio signal corresponding to said sound received by said first microphone; transforming sound received by a second microphone, said second microphone being spaced apart from said first microphone, into a second input signal, wherein said second input signal is a frequency domain signal of an analog-to-digital converted audio signal corresponding to the sound received by said second microphone; calculating, for each of a plurality of frequency components, an energy transfer function value as a real-valued quotient by dividing a temporally averaged product of an amplitude of said first input signal and said second input signal by a temporally averaged absolute square of said second input signal, wherein said temporal averaging of said product and said temporal averaging of said absolute square are subject to a first update condition; calculating, for each of said plurality of frequency components, a gain value as a function of said calculated energy transfer function value; and generating said noise reduced output signal based on a product of said first input signal and said calculated gain value at each of said plurality of frequency components. |
