1
Michael Alan Pogue, Philip Ryan Hilmes: Detecting self-generated wake expressions. Amazon Technologies, Lee & Hayes PLLC, August 29, 2017: US09747899 (21 worldwide citation)

A speech-based audio device may be configured to detect a user-uttered wake expression and to respond by interpreting subsequent words or phrases as commands. In order to distinguish between utterance of the wake expression by the user and generation of the wake expression by the device itself, dire ...


2
Robert Ayrapetian, Philip Ryan Hilmes: Adaptive beamforming to create reference channels. AMAZON TECHNOLOGIES, Pierce Atwood, August 29, 2017: US09747920 (21 worldwide citation)

An echo cancellation system that performs audio beamforming to separate audio input into multiple directions and determines a target signal and a reference signal from the multiple directions. For example, the system may detect a strong signal associated with a speaker and select the strong signal a ...


3
Philip Ryan Hilmes, Robert Ayrapetian: Multichannel acoustic echo cancellation. AMAZON TECHNOLOGIES, Pierce Atwood, May 23, 2017: US09659555 (20 worldwide citation)

An echo cancellation system performs audio beamforming to separate audio input into multiple directions (e.g., target signals) and generates multiple audio outputs using two acoustic echo cancellation (AEC) circuits. A first AEC removes a playback reference signal (generated from a signal sent a lou ...


4
Philip Ryan Hilmes, Robert Ayrapetian: Hybrid reference signal for acoustic echo cancellation. AMAZON TECHNOLOGIES, Pierce Atwood, May 16, 2017: US09653060 (18 worldwide citation)

An echo cancellation system that uses a combined reference signal using a playback reference signal and an adaptive reference signal. The playback reference signal is generated from a playback signal sent to a loudspeaker and the adaptive reference signal is generated using beamforming on microphone ...


5
Charles Tritschler, Amit Singh Chhetri, Philip Ryan Hilmes: Speech processing of reflected sound. Amazon Technologies, Pierce Atwood, November 14, 2017: US09820036 (10 worldwide citation)

Sound is banked laterally over an array of microphones arranged on a rear surface of a device. Sound enters a duct behind the device from different directions via inlets along the sides of the device. The duct directs the sound waves across the microphone array. An effective direction from which the ...


6
Shiva Sundaram, Amit Singh Chhetri, Ramya Gopalan, Philip Ryan Hilmes: Method and system for beam selection in microphone array beamformers. Amazon Technologies, Knobbe Martens Olson & Bear, August 30, 2016: US09432769 (5 worldwide citation)

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 beamfo ...


7
Edward Dietz Crump, Philip Ryan Hilmes: Distributed speaker synchronization. Amazon Technologies, Lee & Hayes PLLC, April 19, 2016: US09319782 (3 worldwide citation)

Audio of electronic audio devices may be synchronized by a signal synchronization component that receives one or more signals corresponding to elements of the audio output by the electronic audio devices. The signal synchronization component may perform calculations to align signals corresponding to ...


8
Jeffrey Cornelius O Neill, Amit Singh Chhetri, Philip Ryan Hilmes, Ramya Gopalan: Beam forming for a wearable computer. Amazon Technologies, Lee & Hayes PLLC, August 30, 2016: US09432768 (2 worldwide citation)

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 th ...


9
William Folwell Barton, Kavitha Velusamy, Philip Ryan Hilmes: Detecting device proximities. Amazon Technologies, Lee & Hayes PLLC, May 10, 2016: US09336767 (2 worldwide citation)

An audio device may be configured to produce output audio and to capture input audio for speech recognition. In some cases, a second device may also be used to capture input audio to improve isolation of input audio with respect to the output audio. In addition, acoustic echo cancellation (AEC) may ...


10
Robert Ayrapetian, Philip Ryan Hilmes, Carlo Murgia: Reconfigurale fixed beam former using given microphone array. Amazon Technologies, Pierce Atwood, May 8, 2018: US09966059 (1 worldwide citation)

An acoustic interference cancellation system that performs beamforming using a subset of microphones from a microphone array. For example, a first group of microphones from an array can be used to generate target signals that focus on the direction of the desired speech in the audio and a second gro ...