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公开(公告)号：US12087318B1
公开(公告)日：2024-09-10
申请号：US17963652
申请日：2022-10-11
Applicant: Amazon Technologies, Inc.
Inventor： Michael Alan Pogue , Kavitha Velusamy , Preethi Parasseri Narayanan , Tony David , Philip Ryan Hilmes
CPC classification number: G10L25/00 , G06F3/167 , H04R3/005 , H04R27/00 , H04R2227/003 , H04R2227/005 , H04R2227/007
Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.
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公开(公告)号：US10515653B1
公开(公告)日：2019-12-24
申请号：US16114993
申请日：2018-08-28
Applicant: Amazon Technologies, Inc.
Inventor： Michael Alan Pogue , Kavitha Velusamy , Preethi Parasseri Narayanan , Tony David , Philip Ryan Hilmes
IPC: G10L25/00
Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.
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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.
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公开(公告)号：US11624800B1
公开(公告)日：2023-04-11
申请号：US17501093
申请日：2021-10-14
Applicant: Amazon Technologies, Inc.
Inventor： William Folwell Barton , Kenneth Edgar Hild, II , Ramya Gopalan , Kavitha Velusamy , Amit Singh Chhetri
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.
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公开(公告)号：US11175372B1
公开(公告)日：2021-11-16
申请号：US16925046
申请日：2020-07-09
Applicant: Amazon Technologies, Inc.
Inventor： William Folwell Barton , Kenneth Edgar Hild, II , Ramya Gopalan , Kavitha Velusamy , Amit Singh Chhetri
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.
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Patent Agency Ranking
公开(公告)号：US10062372B1
公开(公告)日：2018-08-28
申请号：US15149688
申请日：2016-05-09
Applicant: Amazon Technologies, Inc.
Inventor： William Folwell Barton , Philip Ryan Hilmes , Kavitha Velusamy
IPC: G10K11/178 , G10L15/34
CPC classification number: G10K11/178 , G10K11/16 , G10K2210/108 , G10K2210/3028 , G10K2210/505 , G10L15/34 , G10L21/0208 , G10L2021/02082 , G10L2021/02165 , H04M9/082
Abstract: 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 be used to remove components of output audio from input signals of the first and second devices. AEC may be implemented by an adaptive filter based on dynamically optimized filter coefficients. The filter coefficients may be analyzed to detect situations in which the first and second devices are too close to each other, and the user may then be prompted to increase the distance between the two devices.
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公开(公告)号：US11501792B1
公开(公告)日：2022-11-15
申请号：US17135570
申请日：2020-12-28
Applicant: Amazon Technologies, Inc.
Inventor： Michael Alan Pogue , Kavitha Velusamy , Preethi Parasseri Narayanan , Tony David , Philip Ryan Hilmes
Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.
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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
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.
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公开(公告)号：US10297250B1
公开(公告)日：2019-05-21
申请号：US13792505
申请日：2013-03-11
Applicant: Amazon Technologies, Inc.
Inventor： Scott Ian Blanksteen , Nikko Strom , Kavitha Velusamy , Tony David , Edward Dietz Crump
Abstract: The systems, devices, and processes described herein may asynchronously transfer audio signals from a voice-controlled device to a remote device. The audio signals may correspond to sound that is captured by multiple microphones of the voice-controlled device, which may then process the audio signals. The audio signals may also be transferred to the remote device for processing. Moreover, a determination of whether the voice-controlled device or the remote device is to process the audio signals may be based at least in part on the bandwidth of a network communicatively coupled to the voice-controlled device. The voice-controlled device may also cache and log the audio signals, and then asynchronously stream the audio signals to the remote device after the audio signals are initially processed, which may be based on the bandwidth of the network. The remote device may utilize the unprocessed audio signals to improve subsequent processing of audio signals.
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公开(公告)号：US09866964B1
公开(公告)日：2018-01-09
申请号：US13779604
申请日：2013-02-27
Applicant: Amazon Technologies, Inc.
Inventor： Menashe Haskin , Kavitha Velusamy , Daniel Christopher Bay , Jason Zimmer
IPC: H04R5/04
CPC classification number: H04R5/04 , H04R27/00 , H04R2227/003 , H04R2420/07
Abstract: A computing system with multiple audio devices local to an environment to provide synchronized audio output to a user. A remote system receives a local audio signal representing sound captured from an environment from a local audio device and a remote audio signal representing sound captured from the environment from the remote audio device. The server determines a delay associated with the local audio signal and a delay associated with the remote audio signals and, based on the delays, synchronizes the audio being output by the local and remote devices.
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