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Non-Linear Echo Path Detection

  • US 20160225385A1
  • Filed: 05/22/2015
  • Published: 08/04/2016
  • Est. Priority Date: 02/03/2015
  • Status: Active Grant
First Claim
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1. A user terminal comprising;

  • a loudspeaker component;

    a microphone component; and

    an audio signal processing module, the audio signal processing module comprising;

    an audio reference signal generator configured, prior to establishment of a communication event over a communications network with at least one further user terminal, to generate an audio reference signal, and output the audio reference signal to the loudspeaker component for playout;

    an echo removal module configured to perform echo removal on audio signals received via the microphone component during the communication event; and

    a detector configured, prior to establishment of the communication event, to;

    determine characteristics of the audio reference signal;

    receive an audio signal output from the microphone component, wherein the received audio signal includes echo resulting from the outputted audio reference signal;

    determine characteristics of the received audio signal;

    compare the determined characteristics of the audio reference signal with the determined characteristics of the received audio signal to detect a nonlinear echo path of the echo, andconfigure a component of the audio signal processing module based on said detection.

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