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US 12,598,261 B2Granted
Wideband doubletalk detection for optimization of acoustic echo cancellation
AssigneeShure Acquisition Holdings, Inc.
InventorsWesley Lethem, Justin Joseph Sconza, Christopher George Rieger
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Abstract
Acoustic echo cancellation systems and methods are provided that improve the quality of the audio transmitted from by an audio device a near end to a far end when a doubletalk condition is present, including allowing certain subbands of an echo-cancelled signal to be less attenuated by overriding certain gains of subbands of the echo-cancelled audio signal in a non-linear processor, and compressing and applying makeup gain to a remote audio signal.
Claims20
A device, comprising:
- one or more processors configured to:
- determine an initial echo-cancelled audio signal based on a microphone signal and a remote audio signal;
- determine that a doubletalk condition is present in one or more first subbands of the initial echo-cancelled audio signal;
- determine that a doubletalk condition is not present in one or more second subbands of the initial echo-cancelled audio signal;
- override one or more gains of the one or more second subbands of the initial echo-cancelled audio signal to generate a final echo-cancelled audio signal;
- and
- transmit the final echo-cancelled audio signal to a remote location.
4 more elements
A method, comprising:
- determining an initial echo-cancelled audio signal based on a microphone signal and a remote audio signal;
- determining that a doubletalk condition is present in one or more first subbands of the initial echo-cancelled audio signal;
- determining that a doubletalk condition is not present in one or more second subbands of the initial echo-cancelled audio signal;
- overriding one or more gains of the one or more second subbands of the initial echo-cancelled audio signal to generate a final echo-cancelled audio signal;
- and
- transmitting the final echo-cancelled audio signal to a remote location.
3 more elements
A system, comprising:
- a microphone configured to generate a microphone signal;
- a loudspeaker configured to generate sound based on a remote audio signal, wherein the microphone and the loudspeaker are located in a same housing;
- and
- one or more processors configured to:
- determine an initial echo-cancelled audio signal based on a microphone signal and a remote audio signal;
- determine that a doubletalk condition is present in one or more first subbands of the initial echo-cancelled audio signal;
- and
- determine that a doubletalk condition is not present in one or more second subbands of the initial echo-cancelled audio signal;
- override one or more gains of the one or more second subbands of the initial echo-cancelled audio signal to generate a final echo-cancelled audio signal;
- and
- compress the remote audio signal based on an energy of the microphone signal to generate a compressed remote audio signal.
8 more elements
Dependencies are inferred from the claim text.