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公开(公告)号：US20240257821A1
公开(公告)日：2024-08-01
申请号：US18561028
申请日：2022-05-20
申请人： Sonos, Inc.
IPC分类号： G10L21/0216 , G10L21/0208 , G10L25/84 , H04R27/00
CPC分类号： G10L21/0216 , G10L25/84 , H04R27/00 , G10L2021/02082 , H04R2227/005 , H04R2227/009
摘要： Systems and methods for improved acoustic echo cancellation and convergence state detection are disclosed. An adaptive filter of a network microphone device (NMD) can be used to generate a filter output to be applied to microphone input signals for echo cancellation. The filter output can be generated using a reference signal corresponding to source audio content played back via transducers of the NMD. The adaptive filter can be updated dynamically over time based at least in part on an adaptation parameter that determines the rate of adaptation. In response to determining that a reset event has occurred, the adaptation parameter can be reset to a default value. Additionally or alternatively, in response to detecting a convergence error, the adaptation parameter can be reset to a default value.
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公开(公告)号：US11769511B2
公开(公告)日：2023-09-26
申请号：US18060176
申请日：2022-11-30
申请人： Sonos, Inc.
摘要： Systems and methods for audio processing include capturing first sound data via at least one microphone of a network microphone device (NMD) and determining, via a voice activity detection process, that the first sound data does not include voice activity. The first sound data is stored in a buffer, and the NMD forgoes spatial processing of the first sound data. The NMD can capture second sound data and determine, via the voice activity process, that the second sound data includes voice activity. The NMD spatially processes the sound data to produce filtered sound data. The NMD detects a wake word based on data in the buffer. After detecting the wake word, the NMD may determine an action to be performed based on the data in the buffer.
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公开(公告)号：US20230186923A1
公开(公告)日：2023-06-15
申请号：US18060176
申请日：2022-11-30
申请人： Sonos, Inc.
摘要： Systems and methods for audio processing include capturing sound data via at least one microphone of a network microphone device (NMD) and determining whether the captured sound includes voice activity. While in a first stage, the NMD forgoes spatial processing of the captured sound data. If the NMD determines that the detected sound includes voice activity, the NMD transitions to a second stage. In this second stage, the NMD spatially processes the detected sound to produce filtered sound data and detects a wake word. After detecting the wake word, the NMD may determine an action to be performed based on the captured sound data.
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公开(公告)号：US20230419972A1
公开(公告)日：2023-12-28
申请号：US18461457
申请日：2023-09-05
申请人： Sonos, Inc.
摘要： Systems and methods for audio processing include capturing first sound data via at least one microphone of a network microphone device (NMD) and determining, via a voice activity detection process, that the first sound data does not include voice activity. The first sound data is stored in a buffer, and the NMD forgoes spatial processing of the first sound data. The NMD can capture second sound data and determine, via the voice activity process, that the second sound data includes voice activity. The NMD spatially processes the second sound data to produce filtered sound data. The NMD detects a wake word based on data in the buffer. After detecting the wake word, the NMD may determine an action to be performed based on the data in the buffer.
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公开(公告)号：US11551700B2
公开(公告)日：2023-01-10
申请号：US17248427
申请日：2021-01-25
申请人： Sonos, Inc.
摘要： Systems and methods for audio processing include capturing sound data via at least one microphone of a network microphone device (NMD) and determining whether the captured sound includes voice activity. While in a first stage, the NMD forgoes spatial processing of the captured sound data. If the NMD determines that the detected sound includes voice activity, the NMD transitions to a second stage. In this second stage, the NMD spatially processes the detected sound to produce filtered sound data and detects a wake word. After detecting the wake word, the NMD may determine an action to be performed based on the captured sound data.
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公开(公告)号：US20220238120A1
公开(公告)日：2022-07-28
申请号：US17248427
申请日：2021-01-25
申请人： Sonos, Inc.
摘要： Systems and methods for audio processing include capturing sound data via at least one microphone of a network microphone device (NMD) and determining whether the captured sound includes voice activity. While in a first stage, the NMD forgoes spatial processing of the captured sound data. If the NMD determines that the detected sound includes voice activity, the NMD transitions to a second stage. In this second stage, the NMD spatially processes the detected sound to produce filtered sound data and detects a wake word. After detecting the wake word, the NMD may determine an action to be performed based on the captured sound data.
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