System for reducing speakerphone echo
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United States of America Patent
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Jul 8, 2014
Grant Date -
Jun 27, 2013
app pub date -
Dec 27, 2011
filing date -
Dec 27, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A telecommunication system including a speakerphone provides a coupled signal path, including a microphone, configured to sense an incoming audio signal and an echo signal and generate a coupled signal. The echo signal includes non-linear distortion generated by a speaker of the speakerphone. An echo signal path, including an amplifier, is configured to sense the echo signal and generate an echo reference signal. The echo reference signal includes the non-linear distortion. An acoustic echo canceller is configured to receive the coupled signal from the coupled signal path, to receive the echo reference signal from the echo signal path, and to cancel out the non-linear distortion included in the coupled signal based on the non-linear distortion included in the echo reference signal.
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Family
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