Patent ID: 8605890

Claim:
An acoustic echo cancellation system configured to reduce acoustic echo in an audio signal generated by a microphone, the acoustic echo resulting from audio signals that have been spatialized and that are received via two or more audio channels, the acoustic echo cancellation system comprising: an acoustic echo cancellation unit comprising: a first acoustic echo canceller operably coupled to a first channel of the two or more audio channels and configured to apply a first echo cancellation coefficient to a first audio signal transmitted via the first channel to generate a first echo cancellation factor, the first echo cancellation coefficient determined as a function of a first gain and delay modulation factor used to spatialize the first audio signal, the first gain and delay modulation factor substantially constant over time; and a second acoustic echo canceller operably coupled to a second channel of the two or more audio channels and configured to apply a second echo cancellation coefficient to a second audio signal transmitted via the second channel to generate a second echo cancellation factor, the second echo cancellation coefficient determined as a function of a second gain and delay modulation factor used to spatialize the second audio signal, the second gain and delay modulation factor substantially constant over time, and the acoustic echo cancellation unit configured to reduce the acoustic echo in the audio signal generated by the microphone as a function of the first echo cancellation factor and the second echo cancellation factor.