Patent ID: 7315619

Claim:
An audio echo canceller system adjusted to provide an echo attenuated output signal from an echo added input signal including near-end audio in addition to an echo contribution originating from a far-end audio presenter unit receiving a left (L) and a right (R) audio signal, wherein the echo attenuated output signal is generated by attenuating the echo in the echo added input signal by a linear adaptive filter, the far-end audio presenter unit comprising: a first adder configured to add L and R creating a non-delayed mono signal, a delay unit configured to delay said non-delayed mono signal with a predefined time creating a delayed mono signal being loaded into one or more main loudspeakers, and one or more left and one or more right loudspeakers into which a first and a second L or R deduced signal, respectively, are loaded, wherein said non-delayed mono-signal is used as a reference signal for the linear adaptive filter.