Patent ID: 11902757
Assignee: TENCENT AMERICA LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 17:
18. The non-transitory computer-readable medium of claim 17, wherein the instructions further cause the at least one processor to, in the second stage:
generate a second stage input feature based on the first linear projection filter and the normalized log-power spectra of the the echo suppressed signal and the echo signal;
process the second stage input feature through a second linear projection filter, encoding a result of the second linear projection filter to estimate second stage filters, and applying the second stage filters to estimate channels of target speech and microphone noise;
compute a second covariance matrix based on the estimated channels of target speech and microphone noise; and
process the second covariance matrix through the recurrent neural network and outputting the enhancement filters.