公开(公告)号：US09489948B1

公开(公告)日：2016-11-08

申请号：US14658001

申请日：2015-03-13

Applicant: Amazon Technologies, Inc.

Inventor： Wai C. Chu ,  Edward Dietz Crump

IPC: H04R3/00 ,  G10L15/28 ,  H04R1/08 ,  H04R1/02

CPC classification number: G10L15/28 ,  H04R1/08 ,  H04R3/005 ,  H04R27/00 ,  H04R2227/003

Abstract: An augmented reality environment allows interaction between virtual and real objects. Multiple microphone arrays of different physical sizes are used to acquire signals for spatial tracking of one or more sound sources within the environment. A first array with a larger size may be used to track an object beyond a threshold distance, while a second array having a size smaller than the first may be used to track the object up to the threshold distance. By selecting different sized arrays, accuracy of the spatial location is improved.

公开(公告)号：US10966022B1

公开(公告)日：2021-03-30

申请号：US16017908

申请日：2018-06-25

Applicant: Amazon Technologies, Inc.

Inventor： Wai C. Chu ,  Edward Dietz Crump

IPC: H04R3/00 ,  G10L25/78 ,  H04R1/02

Abstract: An augmented reality environment allows interaction between virtual and real objects. Multiple microphone arrays of different physical sizes are used to acquire signals for spatial tracking of one or more sound sources within the environment. A first array with a larger size may be used to track an object beyond a threshold distance, while a second array having a size smaller than the first may be used to track the object up to the threshold distance. By selecting different sized arrays, accuracy of the spatial location is improved.

公开(公告)号：US10242695B1

公开(公告)日：2019-03-26

申请号：US15704285

申请日：2017-09-14

Applicant: Amazon Technologies, Inc.

Inventor： Kavitha Velusamy ,  Wai C. Chu ,  Ramya Gopalan ,  Amit S. Chhetri

IPC: G06K9/00 ,  H04B3/23 ,  G10L25/78 ,  H04N21/442

Abstract: Techniques for enhancing an acoustic echo canceller based on visual cues are described herein. The techniques include changing adaptation of a filter of the acoustic echo canceller, calibrating the filter, or reducing background noise from an audio signal processed by the acoustic echo canceller. The changing, calibrating, and reducing are responsive to visual cues that describe acoustic characteristics of a location of a device that includes the acoustic echo canceller. Such visual cues may indicate that no human being is present at the location, that some subject(s) are engaged in speaking or sound generating activities, or that motion associated with an echo path change has occurred at the location.