News AMD Noise Suppression Video Breaks Cover

There's a couple ways to control background noise. One is gating with cutoff. Another is narrowband filtering.

The approach they are using is to analyze the spectrum using a FFT. Voices and keyboard clicks have very distinct FFT and response curves. The FFT freq resp of a human voice at a distance is different than that of a close up voice which has a more "balanced" approach. A key click has a distinct shape which can determined with vector analysis with minimal delay. You then reshape the waveform once you isolate those elements. But it does require a little sample training to get it correct.
 
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