| 摘要 |
An apparatus capable of performing acoustic echo cancellation and a method thereof are provided. The apparatus comprises a mapping matrix, first and second speakers, first and second microphones, a reference generator, and a multi-channel acoustic echo canceller. The mapping matrix generates an output signal according to the first and second far end signals. The first and second speakers, coupled to the mapping matrix, play the output signal. The first and second microphones receive the first and second echo signals that are acoustically coupled from the first and second speakers to the first and second microphones, wherein the first and second echo signals are correlated to the output signal. The reference generator generates a reference signal linearly correlated to the output signal according to the first and second far end signals. The multi-channel acoustic echo canceller, coupled to the reference generator and the first and second microphones, filters the reference signal to generate the first and second filtered signals to be indicative of the estimated echo signals at the first and second microphones, subtracts the first filtered signal from the first echo signal to generate a first error signal, and subtracts the second filtered signal from the second echo signal to generate a second error signal, and then transmits the first and second error signals to a far end terminal.
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