US 12,506,836 B1 · Method and system for controlling echo cancellation

Abstract

A method performed by a media source device that has several microphones, the method includes receiving an input audio signal, providing the input audio signal to a media playback device that is communicatively coupled to a speaker, receiving, from the microphones, microphone signals that include the ambient sounds within an ambient environment in which the media source device is located and at least one sound of the input audio signal produced by the speaker, producing, using a machine learning (ML) model that has input based on the microphone signals and the input audio signal, an echo reference microphone signal that includes the at least one sound produced by the speaker, and producing an echo cancelled output audio signal by performing echo cancellation upon each of the microphone signals using the input audio signal and the echo reference microphone signal as reference signals.

Claims20

Dependent claims

A method performed by a media source device that has a plurality of microphones, the method comprising:

receiving a first input audio signal;
providing the first input audio signal to a media playback device that is communicatively coupled to a speaker;
receiving, from the plurality of microphones that are arranged to capture ambient sound from within an ambient environment in which the media source device is located, microphone signals that include a second input audio signal played back by the speaker, wherein the second input audio signal comprises the first input audio signal that has been digitally signal processed by the media playback device;
producing an echo reference microphone signal that represents an echo path between the media source device and the media playback device based on the microphone signals and the first input audio signal, wherein the echo reference microphone signal includes at least a portion of the second input audio signal;
and
producing an echo cancelled output audio signal by performing echo cancellation upon each of the microphone signals using the first input audio signal and the echo reference microphone signal as reference signals.

3 more elements

A media source device comprising:

a plurality of microphones that are arranged to capture ambient sound from within an ambient environment in which the media source device is located;
one or more processors;
and
memory having instructions stored therein which when executed by the one or more processors causes the media source device to:
receive a first input audio signal;
transmit, over a wireless network, the first input audio signal to a media playback device that is communicatively coupled to a speaker;
receive, from the plurality of microphones, microphone signals that include a second input audio signal played back by the speaker, wherein the second input audio signal comprises the first input audio signal that has been digitally signal processed by the media playback device;
produce an echo reference microphone signal that represents an echo path between the media source device and the media playback device based on the microphone signals and the first input audio signal, wherein the echo reference microphone signal includes at least a portion of the second input audio signal;
and
produce an echo cancelled output audio signal by performing echo cancellation upon each of the microphone signals using the first input audio signal and the echo reference microphone signal as reference signals.

7 more elements

Dependencies are inferred from the claim text.

Method and system for controlling echo cancellation

Life of this patent

Method and system for controlling echo cancellation

Life of this patent

Abstract

Claims20