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AmazonGranted patentAudio & voiceInterest 6/10

Amazon patents speech enhancement that adapts to internet speed

This patent describes a system that improves the quality of voice calls or audio streams by using a machine learning model to fix distortions. It works by checking how much data is being sent (the bitrate) and adjusting the sound frame-by-frame to make it clearer.

Why it mattersThis could make voice calls and online meetings sound better even when your internet connection is slow or unstable.

In the filing’s own words

Adaptive code enhancement includes receiving feature data of a speech waveform having a plurality of frames, inferring a bitrate based on a quantity of bits of the plurality of frames received from the decoder codec, generating one or more latent feature vectors in accordance with the bitrate and based on the feature data, receiving one or more pitch lags and a speech signal, calculating filter coefficients on a per-frame basis based on the one or more latent feature vectors and the one or more pitch lags, and modifying the speech signal using the one or more filter coefficients to generate a modified speech signal.

What exactly they claim (claim 1)

1. A system, comprising: at least one processor; and a memory, storing program instructions that when executed by the at least one processor, cause the at least one processor to implement a deep neural network (DNN) machine learning model trained to enhance speech, the machine learning model configured to: receive audio data decoded according to a speech codec, determine a bitrate for the audio data based on a quantity of bits for a plurality of frames of the audio data, extract feature data from the audio data, and encode the feature data to produce one or more latent feature vectors according to the bitrate for the audio data, filter the audio data according to a plurality of filter coefficients that are dynamically adjusted on a per-frame basis using the one or more latent feature vectors, and provide the filtered audio data as speech-enhanced audio data.

Facts

Company
Amazon (Amazon Technologies, Inc.)
Official title
Adaptive enhancement of coded speech
Patent number
US12744047B1
Application number
18345305
Filed
Jun 30, 2023
Granted
Sep 22, 2026
Inventors
3
Claims
18

Classified under

G10L 19/26 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.