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公开(公告)号：US12072413B1
公开(公告)日：2024-08-27
申请号：US17218274
申请日：2021-03-31
发明人： Spencer Russell , Krishna Kamath Koteshwara , Tarun Pruthi , Ali Abdollahzadeh Milani , Trausti Thor Kristjansson , Anran Wang
CPC分类号： G01S15/101 , G01N29/46 , G01N29/48 , H04R3/04 , H04R2430/23
摘要： A system that performs wall detection and localization to determine a position of a device relative to acoustically reflective surfaces. The device emits an audible sound including a frequency modulated signal and captures reflections of the audible sound. The frequency modulated signal enables the device to determine an amplitude of the reflections at different time-of-arrivals, which corresponds to a direction of the reflection. The device then performs beamforming to generate a 2D intensity map that represents an intensity of the reflections at each spatial location around the device. The device detects wall(s) in proximity to the device by identifying peak intensities represented in the 2D intensity map. In some examples, instead of performing beamforming, the device can perform directional wall detection by physically rotating the device and emitting the audible sound in multiple directions. The device may perform ultrasonic wall detection using ultrasonic sound frequencies.
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公开(公告)号：US10755728B1
公开(公告)日：2020-08-25
申请号：US15906949
申请日：2018-02-27
IPC分类号： G10L21/038 , G10L21/0272 , G10L21/0208
摘要： A system configured to improve noise cancellation by using portions of multiple reference signals instead of using a complete reference signal. The system divides a frequency spectrum into frequency bands and selects a single reference signal from a group of potential reference signals for every frequency band. For example, a first reference signal is selected for a first frequency band while a second reference signal is selected for a second frequency band. The system may generate a combined reference signal using portions of each of the selected reference signals, such as a portion of the first reference signal corresponding to the first frequency band and a portion of the second reference signal corresponding to the second frequency band. Additionally or alternatively, the system may perform noise cancellation using each of the selected reference signals and filter the outputs based on the corresponding frequency band to generate combined audio output data.
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公开(公告)号：US10959018B1
公开(公告)日：2021-03-23
申请号：US16252066
申请日：2019-01-18
摘要： A system that performs wall detection, range estimation, and/or corner detection to determine a position of a device relative to acoustically reflective surfaces. The device generates output audio using a loudspeaker, generates microphone audio data using a microphone array, performs beamforming to generate directional audio data and then generates impulse response data for each of a plurality of directions. The device may detect a peak in the impulse response data and determine a distance and/or direction to a reflective surface based on the peak. Based on a number of reflected surfaces and/or direction(s) of the reflected surfaces detected by the device, the device may classify the different directions and estimate where it is in the room, such as whether the device is in a corner, along one wall, or in an open area. By knowing its position relative to the room surfaces, the device may improve sound equalization.
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公开(公告)号：US10777214B1
公开(公告)日：2020-09-15
申请号：US16456247
申请日：2019-06-28
摘要： A system that performs wall detection, range estimation, and/or corner detection to determine a position of a device relative to acoustically reflective surfaces. The device generates output audio using loudspeaker(s), generates microphone audio data using a microphone array, and generates impulse response data for each of the microphones. The device may generate the impulse response data using an acoustic echo cancellation (AEC) component or multi-channel AEC (MC-AEC). The device may detect a peak in the impulse response data and determine a distance to a reflective surface based on the peak. Based on a number of reflected surfaces detected by the device, the device may classify a position of the device within the room, such as whether the device is in a corner, along one wall, or in an open area. By knowing the position relative to the room surfaces, the device may improve sound equalization and other processing.
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公开(公告)号：US20200177945A1
公开(公告)日：2020-06-04
申请号：US16781855
申请日：2020-02-04
发明人： Mark Lawrence , Balsa Laban , Anna Chen Santos , Joseph Pedro Tavares , Miroslav Ristic , Valere Joseph Vanderschaegen , Trausti Thor Kristjansson , Srivatsan Kandadai , Donald L. Cantrell, JR.
IPC分类号： H04N21/422 , G06F3/16 , H04N21/41 , G10L15/22
摘要： A computer-implemented method includes receiving, at a microphone of a voice-controlled device, a speech input from a user and determining, by the voice-controlled device, that a power state of an AV display device that is coupled to the voice-controlled device is an ON or OFF state. Based on the user intent determined from the speech input and the power state of the AV display, the voice-controlled device sends data to the AV display device to switch the AV display device ON or OFF. The method can further include receiving, by the voice-controlled device, content from a content source location and sending the content to the AV display device via an AV port.
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公开(公告)号：US10560737B2
公开(公告)日：2020-02-11
申请号：US15919096
申请日：2018-03-12
发明人： Mark Lawrence , Balsa Laban , Anna Chen Santos , Joseph Pedro Tavares , Miroslav Ristic , Valere Joseph Vanderschaegen , Trausti Thor Kristjansson , Srivatsan Kandadai , Donald L. Cantrell, Jr.
IPC分类号： H04N21/422 , G10L15/22 , H04N21/41
摘要： A computer-implemented method includes receiving, at a microphone of a voice-controlled device, a speech input from a user and determining, by the voice-controlled device, that a power state of an AV display device that is coupled to the voice-controlled device is an ON or OFF state. Based on the user intent determined from the speech input and the power state of the AV display, the voice-controlled device sends data to the AV display device to switch the AV display device ON or OFF. The method can further include receiving, by the voice-controlled device, content from a content source location and sending the content to the AV display device via an AV port.
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公开(公告)号：US11982737B1
公开(公告)日：2024-05-14
申请号：US17363302
申请日：2021-06-30
发明人： Yuzhou Liu , Krishna Kamath Koteshwara , Rui Wang , Harsha Inna Kedage Rao , Tarun Pruthi , Trausti Thor Kristjansson
摘要： Techniques for presence-detection devices to vary presence-detection sensitivity to detect different types of movements by objects, such as major movements and minor movements, using ultrasonic signals. The devices detect movement of a person in an environment by emitting ultrasonic signals into the environment, and characterizing the change in the frequency, or the Doppler shift, of the reflections of the ultrasonic signals off the person caused by the movement of the person relative to the presence-detection devices. The presence-detection devices may control the presence-detection sensitivity in order to detect major movements, such as a user walking in a room, as well as objects minor movements, such as a user typing at a computer. By adjusting the presence-detection sensitivity, the devices are able to improve the overall accuracy of detecting the presence of users in an environment.
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公开(公告)号：US11437057B2
公开(公告)日：2022-09-06
申请号：US16950158
申请日：2020-11-17
发明人： Trausti Thor Kristjansson , Srivatsan Kandadai , Mark Lawrence , Balsa Laban , Anna Chen Santos , Joseph Pedro Tavares , Miroslav Ristic , Valere Joseph Vanderschaegen
摘要： A computer-implemented method includes receiving, at a microphone of a voice-controlled device, a speech input, generating an electrical signal having a first gain level that is below a gain threshold for audible detection by a user, transmitting the electrical signal to the speaker and detecting, by the microphone, an audio signal that includes a combination of ambient noise and a probe audio signal, wherein the probe audio signal is output by the speaker based on the electrical signal. The method further includes determining a power level of the probe audio signal and determining a state of the display based on the power level of the probe audio signal.
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公开(公告)号：US11044567B1
公开(公告)日：2021-06-22
申请号：US16800577
申请日：2020-02-25
摘要： Systems and methods for microphone degradation detection and compensation are disclosed. For example, microphones of an electronic device may capture audio and generate corresponding audio data, such as during a period of time where only ambient noise is present. Sound intensity level value differences between audio data from the various microphones may be determined and when one or more of the sound intensity level value differences satisfies a threshold amount, the microphone associated with the variant sound intensity level value may be determined to be degraded. The sound intensity level value difference may be compensated for, such as by utilizing sound boosting techniques and/or modifying parameters of a beamforming component.
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公开(公告)号：US10911881B1
公开(公告)日：2021-02-02
申请号：US16582091
申请日：2019-09-25
IPC分类号： H04R29/00 , H04R3/00 , G10L19/008 , H04M1/68
摘要： A system configured to detect a tap event on a surface of a device only using microphone audio data. For example, instead of using a physical sensor to detect the tap event, the device may detect a tap event in proximity to a microphone based on a power level difference between two or more microphones. When a power ratio exceeds a threshold, the device may detect a tap event and perform an action. For example, the device may output an alarm and use a detected tap event as an input to delay or end the alarm. In some examples, the device may detect a tap event using a plurality of microphones. Additionally or alternatively, the device may distinguish between multiple tap events based on a location of the tap event, enabling the device to perform two separate actions depending on the location.
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