Patent ID: 9049531
Filing Date: 2015-06-02
Classification: H04H,H04S

Abstract:
1. A method for mixing microphone signals of an audio recording with a plurality of microphones (multi-microphone audio recording), wherein a multipath propagation of sound portions is given and a first microphone signal and a second microphone signal are subject to the building of blocks of samples and a Fourier-transformation, wherein the spectral values of the respective microphone signal are generated, the spectral values of the first microphone signal are distributed onto the spectral values of the second microphone signal in a first summing level while forming spectral values of a first sum signal, wherein a dynamic correction of the spectral values of one of the two microphone signals occurs, the spectral values of the first sum signal constitute spectral values of a result value, and the spectral values of the result value undergo an inverse Fourier-transformation and the junction of blocks of samples, wherein a result signal is generated, wherein in order to generate the spectral values of the first sum signal of the spectral values of the first microphone signal and the spectral values of the second microphone signal the spectral values of one of the two signals can be chosen, which is to be prioritized over the other signal, the spectral values (A(k)) of the signal to be prioritized are multiplied with the respective corresponding corrective factors m(k), and that the spectral values (B(k)) of the signal not to be prioritized and the corrected spectral values m(k)·A(k) of the signal to be prioritized are added while forming spectral values of the result signal, wherein the calculation of the corrective factors m(k) is as follows: and and and and and