公开(公告)号：US11308939B1

公开(公告)日：2022-04-19

申请号：US16140737

申请日：2018-09-25

Applicant: Amazon Technologies, Inc.

Inventor： Yixin Gao ,  Ming Sun ,  Varun Nagaraja ,  Gengshen Fu ,  Chao Wang ,  Shiv Naga Prasad Vitaladevuni

IPC: G10L15/14 ,  G10L15/22 ,  G06F3/16 ,  G10L15/08

Abstract: A system and method performs wakeword detection and automatic speech recognition using the same acoustic model. A mapping engine maps phones/senones output by the acoustic model to phones/senones corresponding to the wakeword. A hidden Markov model (HMM) may determine that the wakeword is present in audio data; the HMM may have multiple paths for multiple wakewords or may have multiple models. Once the wakeword is detected, ASR is performed using the acoustic model.