公开(公告)号：US11521637B1

公开(公告)日：2022-12-06

申请号：US17037498

申请日：2020-09-29

Applicant: Amazon Technologies, Inc.

Inventor： Jean-Marc Valin ,  Mehmet Umut Isik ,  Neerad Dilip Phansalkar ,  Ritwik Giri ,  Karim Helwani ,  Arvindh Krishnaswamy

IPC: G10L21/034 ,  G06F3/16 ,  G10L25/30

Abstract: Post-filtering may be performed for ratio masks as part of audio enhancement. Audio data may be received. A machine learning model may be applied to generate gain values for different spectrum bands of the audio data. The gain values may then be modified using an envelope post-filter according to a monotonically increasing function applied to the gain values to produce modified gain values used to generate an enhanced version of the audio data.