公开(公告)号：US09837099B1

公开(公告)日：2017-12-05

申请号：US15250659

申请日：2016-08-29

Applicant: Amazon Technologies, Inc.

Inventor： Shiva Sundaram ,  Amit Singh Chhetri ,  Ramya Gopalan ,  Philip Ryan Hilmes

IPC: H04R3/00 ,  G10L21/028 ,  G10L25/84 ,  G10L25/72 ,  G10L21/0216

CPC classification number: G10L21/028 ,  G10L25/72 ,  G10L25/84 ,  G10L2021/02166 ,  H04R1/406 ,  H04R3/005 ,  H04R25/405 ,  H04R25/407 ,  H04R2430/23

Abstract: Embodiments of systems and methods are described for determining which of a plurality of beamformed audio signals to select for signal processing. In some embodiments, a plurality of audio input signals are received from a microphone array comprising a plurality of microphones. A plurality of beamformed audio signals are determined based on the plurality of input audio signals, the beamformed audio signals comprising a direction. A plurality of signal features may be determined for each beamformed audio signal. Smoothed features may be determined for each beamformed audio signal based on at least a portion of the plurality of signal features. The beamformed audio signal corresponding to the maximum smoothed feature may be selected for further processing.

公开(公告)号：US09689960B1

公开(公告)日：2017-06-27

申请号：US13857040

申请日：2013-04-04

Applicant: Amazon Technologies, Inc.

Inventor： William Folwell Barton ,  Kenneth Edgar Hild, II ,  Ramya Gopalan ,  Kavitha Velusamy ,  Amit Singh Chhetri

IPC: H04R3/00 ,  G01S3/808 ,  H04B3/20 ,  H04R25/00

CPC classification number: G01S3/8083 ,  G01S3/805 ,  G01S3/86 ,  G01S5/22 ,  H04R1/406 ,  H04R3/005 ,  H04R25/407 ,  H04R2201/401 ,  H04R2201/403 ,  H04R2430/20 ,  H04R2499/11

Abstract: The systems, devices, and processes described herein may identify a beam of a voice-controlled device that is directed toward a reflective surface, such as a wall. The beams may be created by a beamformer. An acoustic echo canceller (AEC) may create filter coefficients for a reference sound. The filter coefficients may be analyzed to identify beams that include multiple peaks. The multiple peaks may indicate presence of one or more reflective surfaces. Using the amplitude and the time delay between the peaks, the device may determine that it is close to a reflective surface in a direction of the beam.

公开(公告)号：US09678559B1

公开(公告)日：2017-06-13

申请号：US14859008

申请日：2015-09-18

Applicant: Amazon Technologies, Inc.

Inventor： David William Devries ,  Stewart Robin Shearer ,  Amit Singh Chhetri ,  Serkan Hatipoglu ,  Omar Sze Leung ,  Michael Serge Devyver ,  Leo Benedict Baldwin ,  Noam Sorek

IPC: G06F1/32 ,  G06F3/041 ,  G06F3/16 ,  G01P15/09 ,  G01P15/097

CPC classification number: G06F1/3231 ,  G01P15/097 ,  G06F1/3265 ,  G06F3/0416 ,  G06F3/16 ,  Y02D10/153 ,  Y02D10/173

Abstract: A decision engine executing on an electronic device may determine, using sensor data captured by multiple sensors of the device, whether a user is present in an environment that includes the device. If the user is determined to be present in the environment, the device may transition from a first state to a second state. The first state may be a first power state of the device in which the device is powered off or an idle or dormant state in which the device is powered on but a display of the device is powered off. Correspondingly, the second state may be a second power state of the device in which the device and the display are powered on and content is being rendered on the display. If the decision engine cannot make a determination based on the sensor data, a context engine may adjudicate the user presence determination.

公开(公告)号：US09432768B1

公开(公告)日：2016-08-30

申请号：US14229406

申请日：2014-03-28

Applicant: Amazon Technologies, Inc.

Inventor： Jeffrey Cornelius O'Neill ,  Amit Singh Chhetri ,  Philip Ryan Hilmes ,  Ramya Gopalan

IPC: H04R3/00

CPC classification number: H04R3/005 ,  H04R2201/023 ,  H04R2499/11

Abstract: A wearable computer is configured to use beamforming techniques to isolate a user's speech from extraneous audio signals occurring within a physical environment. A microphone array of the wearable computer may generate audio signal data from an utterance from a user's mouth. A motion sensor(s) of the wearable computer may generate motion data from movement of the wearable computer. This motion data may be used to determine a direction vector pointing from the wearable computer to the user's mouth, and a beampattern may be defined that has a beampattern direction in substantial alignment with the determined direction vector to focus the microphone array on the user's mouth for speech isolation.

Abstract translation: 可穿戴式计算机被配置为使用波束形成技术来将用户的语音与在物理环境中发生的外来音频信号隔离开来。 可穿戴式计算机的麦克风阵列可以从用户口的话语产生音频信号数据。 可穿戴计算机的运动传感器可以从可穿戴计算机的运动产生运动数据。 该运动数据可以用于确定从可佩戴计算机指向用户嘴部的方向矢量，并且可以限定具有与所确定的方向矢量基本对准的波纹图案方向的波纹图案，以将麦克风阵列聚焦在用户的嘴上 言语隔离。