Patent ID: 11930333
Assignee: BESTECHNIC (SHANGHAI) CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 17:
18. A method of noise suppression for a personal sound amplification product (PSAP), comprising:
processing an environmental audio signal acquired through one or more microphones to generate a set of first sub-band signals in a set of first sub-bands;
processing the environmental audio signal to generate a set of second sub-band signals a set of second sub-bands;
determining a set of first gains for the set of first sub-band signals in the set of first sub-bands based on the set of second sub-band signals in the set of second sub-bands; and
processing the set of first sub-band signals based on the set of first gains to generate a noise-suppressed audio signal,
wherein determining the set of first gains comprises:
determining a set of speech presence probabilities associated with the set of second sub-band signals, respectively;
determining a set of second gains in the set of second sub-bands based on the set of speech presence probabilities, respectively; and
determining the set of first gains in the set of first sub-bands based on the set of second gains in the set of second sub-bands;

wherein determining the set of first gains in the set of first sub-bands based on the set of second gains in the set of second sub-bands comprises:
for each first sub-band,
determining, from the set of second sub-bands, one or more second sub-bands included within the first sub-band;
determining, from the set of second gains, one or more second gains in the one or more second sub-bands, respectively; and
determining a first gain in the first sub-band based on the one or more second gains; and

wherein determining the first gain in the first sub-band based on the one or more second gains comprises:
determining the first gain to be a maximal gain among the one or more second gains.