Full Duplex Speakerphone Design Using Acoustically Compensated Speaker Distortion
First Claim
1. A telecommunication system including a full duplex speakerphone, comprising:
- a main signal path, including a main microphone, configured to sense an uplink signal and an echo signal and generate a coupled signal, the echo signal including non-linear distortion generated by a speaker of the speakerphone;
an echo signal path, including an echo reference microphone, configured to sense the echo signal and generate a reference signal, the reference signal including downlink information and the non-linear distortion; and
an acoustic echo canceller (AEC) configured to receive the coupled signal from the main signal path, to receive the 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 reference signal.
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Accused Products
Abstract
A telecommunication system including a fall duplex speakerphone, comprising a first microphone to generate a coupled signal including uplink information and non-linear distortion sensed by the first microphone in a speaker phone mode, a second microphone to generate a reference signal including downlink information and the non-linear distortion sensed by the second microphone in the speaker phone mode, and an acoustic echo canceller (AEC) to receive the coupled signal from the first microphone, to receive the reference signal from the second microphone, and to cancel out the non-linear distortion included in the coupled signal based on the non-linear distortion included in the reference signal.
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Citations
21 Claims
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1. A telecommunication system including a full duplex speakerphone, comprising:
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a main signal path, including a main microphone, configured to sense an uplink signal and an echo signal and generate a coupled signal, the echo signal including non-linear distortion generated by a speaker of the speakerphone; an echo signal path, including an echo reference microphone, configured to sense the echo signal and generate a reference signal, the reference signal including downlink information and the non-linear distortion; and an acoustic echo canceller (AEC) configured to receive the coupled signal from the main signal path, to receive the 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 reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21)
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11. A method for canceling out non-linear distortion in a telecommunication system, the method comprising:
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generating, using a main microphone, a coupled signal including uplink information and non-linear distortion sensed by the first microphone; generating, using an echo microphone, a reference signal including the downlink information and the non-linear distortion; receiving, at an acoustic echo canceller (AEC), the coupled signal from the first microphone and the reference signal from the second microphone; and cancelling out, at the AEC, the non-linear distortion included in the coupled signal based on the non-linear distortion included in the reference signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification