ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,525,229, issued on Jan. 13, was assigned to Google LLC (Mountain View, Calif.).
"Small footprint multi-channel keyword spotting" was invented by Jilong Wu (Mountain View, Calif.) and Yiteng Huang (Mountain View, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method to detect a hotword in a spoken utterance includes receiving a sequence of input frames characterizing streaming multi-channel audio. Each channel of the streaming multi-channel audio includes respective audio features captured by a separate dedicated microphone. For each input frame, the method includes processing, using a three-dimensional (3D) single value decomposition filter (SV...