公开(公告)号：US10803885B1

公开(公告)日：2020-10-13

申请号：US16023923

申请日：2018-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Chieh-Chi Kao ,  Chao Wang ,  Weiran Wang ,  Ming Sun

IPC: G10L25/78 ,  G10L25/51 ,  G10L15/22 ,  G10L15/16

Abstract: An audio event detection system that processes audio data into audio feature data and processes the audio feature data using pre-configured candidate interval lengths to identify top candidate regions of the feature data that may include an audio event. The feature data from the top candidate regions are then scored by a classifier, where the score indicates a likelihood that the candidate region corresponds to a desired audio event. The scores are compared to a threshold, and if the threshold is satisfied, the top scoring candidate region is determined to include an audio event.

公开(公告)号：US10418957B1

公开(公告)日：2019-09-17

申请号：US16023990

申请日：2018-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Weiran Wang ,  Chao Wang ,  Chieh-Chi Kao

IPC: H03G3/32 ,  G10L25/78 ,  G06N5/04

Abstract: An audio event detection system that subsamples input audio data using a series of recurrent neural networks to create data of a coarser time scale than the audio data. Data frames corresponding to the coarser time scale may then be upsampled to data frames that match the finer time scale of the original audio data frames. The resulting data frames are then scored with a classifier to determine a likelihood that the individual frames correspond to an audio event. Each frame is then weighted by its score and a composite weighted frame is created by summing the weighted frames and dividing by the cumulative score. The composite weighted frame is then scored by the classifier. The resulting score is taken as an overall score indicating a likelihood that the input audio data includes an audio event.