Large distance microphone array noise cancellation method and noise cancellation system
A microphone array and noise elimination technology, applied in the field of signal processing, can solve the problem of unsatisfactory noise elimination effect and achieve the effect of improving the noise elimination ability
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[0069] The first embodiment of the present invention proposes a noise cancellation system whose structure is shown in Figure 2, including five components: a beamforming unit, a speech detection unit, an adaptive filter, a single-channel speech enhancement unit and an automatic gain control unit .
[0070] The functions of each component are as follows:
[0071] 1. Beamforming unit:
[0072] The beamforming unit is used to perform beamforming processing on the signals collected by the two microphones to obtain an enhanced target voice signal and a weakened target voice signal.
[0073] The input of the beamforming unit is the signals X1(k) and X2(k) collected by two microphones. Through the beamforming algorithm, two output signals are generated, one of which enhances the target voice signal, and the other weakens the target voice. signal, which mainly contains noise.
[0074] The beamforming algorithm mainly processes the signals collected by the microphone array, so that t...
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