US 11,056,109 B2
Reference audio extraction device for use with network microphones with acoustic echo cancellation and beamforming
Mark LaBosco, New City, NY (US)
Assigned to Crestron Electronics, Inc., Rockleigh, NJ (US)
Filed by Crestron Electronics, Inc., Rockleigh, NJ (US)
Filed on Dec. 21, 2018, as Appl. No. 16/229,263.
Application 16/229,263 is a continuation of application No. 16/207,847, filed on Dec. 3, 2018.
Application 16/207,847 is a continuation of application No. 16/207,924, filed on Dec. 3, 2018.
Prior Publication US 2020/0175977 A1, Jun. 4, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 15/22 (2006.01); G10L 21/0208 (2013.01); G10L 15/30 (2013.01); G06F 3/16 (2006.01)
CPC G10L 15/22 (2013.01) [G06F 3/167 (2013.01); G10L 15/30 (2013.01); G10L 21/0208 (2013.01); G10L 2015/223 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An audio extraction device for use in an audio signal processing system, comprising:
an audio transceiver adapted to receive an audio signal;
a delay circuit adapted to delay the received audio signal by a first delay period;
a first audio transmitter adapted to transmit the delayed version of the received audio signal to a first destination; and
a second audio transmitter adapted to transmit the un-delayed version of the received audio signal to a second destination, wherein the first destination comprises:
an amplifier, and wherein the amplifier is adapted to
output the delayed version of the received audio signal to one or more speakers, and wherein
each of the one or more speakers are adapted to broadcast the delayed version of the received audio signal as an acoustical delayed version of the received audio signal, and wherein the second destination comprises:
a network microphone device (NMD), the NMD comprising
one or more microphones each of which is adapted to
receive a combined audio signal, the combined audio signal comprising the acoustical delayed version of the received audio signal and an ambient audio signal, and wherein each of the one or more microphones is further adapted to
convert and output the combined audio signal as a mic output audio signal, and wherein the NMD further comprises
an acoustic echo cancellation circuit (AEC) adapted to
receive the mic output audio signal and the un-delayed version of the received audio signal, and wherein the AEC is further adapted to
modify the mic output audio signal with the un-delayed version of the received audio signal.