Conferencing apparatus that combines a beamforming microphone array with an acoustic echo canceller

CAFC
  • US 9,635,186 B2
  • Filed: 06/23/2016
  • Issued: 04/25/2017
  • Est. Priority Date: 06/11/2011
  • Status: Active Grant
First Claim
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1. A conferencing apparatus that combines a beamforming microphone array with an acoustic echo canceller, comprising:

  • a beamforming microphone array that further comprises a plurality of microphones wherein each microphone is configured to sense acoustic waves and said plurality of microphones are oriented to develop a corresponding plurality of microphone signals;

    a processor, memory, and storage operably coupled to said beamforming microphone array, said processor configured to;

    perform a beamforming operation with a beamforming module to combine the plurality of microphone signals from said beamforming microphone array into a plurality of combined signals that is greater in number than one and less in number than the plurality of microphone signals, each of the plurality of combined signals corresponding to a different fixed beam;

    perform an acoustic echo cancellation operation with an acoustic echo canceller on the plurality of combined signals to generate a plurality of combined echo cancelled signals; and

    select with a signal selection module, one or more of the combined echo cancelled signals for transmission to the far end, wherein said signal selection module uses the far end signal as information to inhibit said signal selection module from changing the selection of the combined echo cancelled signals while only the far end signal is active.

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