Patent ID: 8774399

Claim:
A telecommunications system for a speakerphone, comprising: a loudspeaker to output downlink signals received from a network; a loudspeaker driver connected with the loudspeaker, the loudspeaker driver to drive the output of the loudspeaker; a microphone to receive inputted signals at the microphone, the inputted signals including non-linear distortion received from the loudspeaker; an echo canceller connected with the microphone, the echo canceller to receive the inputted signals; and an amplifier connected between the loudspeaker driver and the loudspeaker, the amplifier to send to the echo canceller an echo reference signal representing the non-linear distortion, the echo canceller to cancel at least some of the non-linear distortion received at the microphone based on the echo reference signal, wherein said at least some of the non-linear distortion is generated by the loudspeaker.