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

Claim 6:
7. The method according to claim 6, wherein the dividing comprises:
dividing, the respective call audio stream into the audio frames in a time domain space;
converting the audio frames from the time domain space to a frequency domain space to obtain corresponding voice spectra;
determining subbands in each of the respective voice spectra of the audio frames;
calculating, for the subbands in each of the audio frames, subband power spectra and noise estimation values corresponding to the subbands;
determining, based on the subband power spectra and the noise estimation values, respective subband signal-to-noise ratios of the subbands; and
calculating the single-frame signal-to-noise ratio of each of the audio frames according to the respective subband signal-to-noise ratios of the subbands in each of the audio frames.