公开(公告)号：US11670299B2

公开(公告)日：2023-06-06

申请号：US17321999

申请日：2021-05-17

Applicant: Amazon Technologies, Inc.

Inventor： Ming Sun ,  Thibaud Senechai ,  Yixin Gao ,  Anish N. Shah ,  Spyridon Matsoukas ,  Chao Wang ,  Shiv Naga Prasad Vitaladevuni

IPC: G10L15/22 ,  G10L15/16

CPC classification number: G10L15/22 ,  G10L15/16

Abstract: A system processes audio data to detect when it includes a representation of a wakeword or of an acoustic event. The system may receive or determine acoustic features for the audio data, such as log-filterbank energy (LFBE). The acoustic features may be used by a first, wakeword-detection model to detect the wakeword; the output of this model may be further processed using a softmax function, to smooth it, and to detect spikes. The same acoustic features may be also be used by a second, acoustic-event-detection model to detect the acoustic event; the output of this model may be further processed using a sigmoid function and a classifier. Another model may be used to extract additional features from the LFBE data; these additional features may be used by the other models.