NOISE SUPPRESSION USING SEGMENTED FREQUENCY-DEPENDENT PHASE SUPPRESSION Russian patent published in 2021 - IPC G10K11/16 

FIELD: noise suppression.

SUBSTANCE: noise suppression in signal stream containing an interference signal, called noise, is performed by obtaining a digitized noise signal and using a digital processor circuit to divide the received noise signal into different segments of a frequency band and, thus, generating a set of segmented noise signals. Then, individually for each segmented noise signal, the processor shifts the segmented noise signal in time by a value depending on the selected frequency of the segmented noise signal to form a set of shifted segmented noise signals. The exact time shift applied to each noise segment takes into account the frequency content of the segment and the system processing time. Amplitude scaling is applied individually for each segmented noise signal. Shifted and amplitude-scaled segmented noise signals are then combined to form a composite anti-noise signal, which is output to signal stream to attenuate noise through destructive interference.

EFFECT: technical result is obtaining a method for segmented frequency-dependent phase suppression.

32 cl, 22 dwg, 1 tbl