Patent ID: 11887618
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. The method according to claim 7, wherein the calculating, for the subbands in each of the audio frames, the subband power spectra and the noise estimation values corresponding to the subbands comprises:
determining, for each subband in each of the audio frames, the subband power spectrum of the respective subband based on frequency domain complex values of frequencies in the respective subband;
performing smoothing processing on the subband power spectra to obtain corresponding subband smooth power spectra;
determining a minimum value of subband smooth power spectra of subbands with a same subband number in different audio frames as a noise initial value corresponding to the subbands with the corresponding subband number;
determining, for each subband in each of the audio frames, a voice presence probability corresponding to the respective subband according to the subband smooth power spectrum and the noise initial value corresponding to the respective subband; and
determining, for each subband in each of the audio frames, a noise estimation value of the respective subband according to the voice presence probability and the subband power spectrum of the respective subband.