ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,531,064, issued on Jan. 20, was assigned to Amazon Technologies Inc. (Seattle).
"Audio-based user engagement detection" was invented by Wai Chung Chu (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system can operate a speech-controlled device to perform user engagement detection (UED) processing to detect when speech represented in audio data is directed to the device. For example, the device may extract audio features from the audio data and process these audio features using a classifier to estimate an orientation of the user's head, which may be used as a proxy for user engagement. Thus, if the head orientation is within an engage...