Patent ID: 11924367
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. A method, comprising:
receiving, via an interface for an audio enhancement system, first audio data captured by a microphone at a first communication device as part of a two-way communication between the first communication device and a second communication device;
receiving, via the interface for the audio enhancement system, second audio data transmitted from the second communication device to the first communication device as part of the two-way communication;
applying, by the audio enhancement system, a machine learning model trained to determine respective gain values for a plurality of different spectrum bands of the first audio data to suppress noise and suppress echo captured in the first audio data from playback of the second audio data through a speaker at the first communication device, wherein the machine learning model accepts respective input features extracted from the second audio data as a reference signal and extracted from the first audio data based on respective representations of the second audio data and the first audio data in respective sets of frequency bands; and
applying, by the audio enhancement system, an envelope post-filter that individually modifies the respective gain values according to a monotonically increasing function applied to the respective gain values; and
providing, by the audio enhancement system, an enhanced version of the first audio data generated, based, at least in part, on the respectively modified gain values for the plurality of different spectrum bands.