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1. 发明申请

WO2019147427A1 SELECTIVE ADAPTATION AND UTILIZATION OF NOISE REDUCTION TECHNIQUE IN INVOCATION PHRASE DETECTION 审中-公开
公开(公告)号：WO2019147427A1
公开(公告)日：2019-08-01
申请号：PCT/US2019/013479
申请日：2019-01-14
申请人： GOOGLE LLC
发明人： HUGHES, Christopher , HUANG, Yiteng , SHABESTARY, Turaj Zakizadeh , APPLEBAUM, Taylor
IPC分类号： G10L15/20 , G10L21/0208 , G10L15/08 , G10L21/0216
摘要： Techniques are described for selectively adapting and/or selectively utilizing a noise reduction technique in detection of one or more features of a stream of audio data frames. For example, various techniques are directed to selectively adapting and/or utilizing a noise reduction technique in detection of an invocation phrase in a stream of audio data frames, detection of voice characteristics in a stream of audio data frames (e.g., for speaker identification), etc. Utilization of described techniques can result in more robust and/or more accurate detections of features of a stream of audio data frames in various situations, such as in environments with strong background noise. In various implementations, described techniques are implemented in combination with an automated assistant, and feature(s) detected utilizing techniques described herein are utilized to adapt the functionality of the automated assistant.

2. 发明公开

EP4447046A3 CASCADE ARCHITECTURE FOR NOISE-ROBUST KEYWORD SPOTTING 审中-实审
公开(公告)号：EP4447046A3
公开(公告)日：2024-11-13
申请号：EP24197532.5
申请日：2020-04-08
申请人： Google LLC
发明人： HUANG, Yiteng , GRUENSTEIN, Alexander, H.
IPC分类号： G10L15/22 , G10L15/08 , G06F3/16 , G10L15/05 , G10L21/0208
CPC分类号： G10L15/22 , G10L2015/22320130101 , G10L2015/08820130101 , G06F3/167 , G10L15/05 , G10L21/0208
摘要： A method (400) includes receiving, at a first processor (110) of a user device (102), streaming multi-channel audio (118) captured by an array of microphones (107), each channel (119) including respective audio features. For each channel, the method also includes processing, by the first processor, using a first stage hotword detector (210), the respective audio features to determine whether a hotword is detected. When the first stage hotword detector detects the hotword, the method also includes the first processor providing chomped raw audio data (212) to a second processor that processes, using a first noise cleaning algorithm (250), the chomped raw audio data to generate a clean monophonic audio chomp (260). The method also includes processing, by the second processor using a second stage hotword detector (220), the clean monophonic audio chomp to detect the hotword.

3. 发明申请

WO2021206713A1 CASCADE ARCHITECTURE FOR NOISE-ROBUST KEYWORD SPOTTING 审中-公开
公开(公告)号：WO2021206713A1
公开(公告)日：2021-10-14
申请号：PCT/US2020/027337
申请日：2020-04-08
申请人： GOOGLE LLC
发明人： HUANG, Yiteng , GRUENSTEIN, Alexander, H.
IPC分类号： G10L15/22 , G10L15/08 , G06F3/16 , G10L15/05 , G10L21/0208
摘要： A method (400) includes receiving, at a first processor (110) of a user device (102), streaming multi-channel audio (118) captured by an array of microphones (107), each channel (119) including respective audio features. For each channel, the method also includes processing, by the first processor, using a first stage hotword detector (210), the respective audio features to determine whether a hotword is detected. When the first stage hotword detector detects the hotword, the method also includes the first processor providing chomped raw audio data (212) to a second processor that processes, using a first noise cleaning algorithm (250), the chomped raw audio data to generate a clean monophonic audio chomp (260). The method also includes processing, by the second processor using a second stage hotword detector (220), the clean monophonic audio chomp to detect the hotword.

4. 发明申请

WO2018005979A1 BI-MAGNITUDE PROCESSING FRAMEWORK FOR NONLINEAR ECHO CANCELLATION IN MOBILE DEVICES 审中-公开
标题翻译：用于移动设备中非线性回声消除的双重MAG处理框架
公开(公告)号：WO2018005979A1
公开(公告)日：2018-01-04
申请号：PCT/US2017/040313
申请日：2017-06-30
申请人： GOOGLE LLC
发明人： SKOGLUND, Jan , HUANG, Yiteng , LUEBS, Alejandro
IPC分类号： H04M9/08
摘要： Techniques of performing acoustic echo cancellation involve providing a bi-magnitude filtering operation that performs a first filtering operation when a magnitude of an incoming audio signal to be output from a loudspeaker is less than a specified threshold and a second filtering operation when the magnitude of the incoming audio signal is greater than the threshold. The first filtering operation may take the form of a convolution between the incoming audio signal and a first impulse response function. The second filtering operation may take the form of a convolution between a nonlinear function of the incoming audio signal and a second impulse response function. For such a convolution, the bi-magnitude filtering operation involves providing, as the incoming audio signal, samples of the incoming audio signal over a specified window of time. The first and second impulse response functions may be determined from an input signal input into a microphone.
摘要翻译：执行声学回声消除的技术涉及提供双幅度滤波操作，当从扬声器输出的输入音频信号的幅度小于指定阈值时执行第一滤波操作，并且当输入音频信号的幅度大于阈值时进行第二滤波操作。第一滤波操作可以采取输入音频信号与第一脉冲响应函数之间的卷积形式。第二滤波操作可以采用输入音频信号的非线性函数与第二脉冲响应函数之间的卷积的形式。对于这样的卷积，双幅度滤波操作涉及在指定的时间窗口内提供输入音频信号的采样作为输入音频信号。第一和第二脉冲响应函数可以根据输入到麦克风的输入信号来确定。

5. 发明申请

WO2021145873A1 SMALL FOOTPRINT MULTI-CHANNEL KEYWORD SPOTTING 审中-公开
公开(公告)号：WO2021145873A1
公开(公告)日：2021-07-22
申请号：PCT/US2020/013705
申请日：2020-01-15
申请人： GOOGLE LLC
发明人： WO, Jilong , HUANG, Yiteng
IPC分类号： G10L15/16 , G10L15/28 , G10L15/285 , G10L2015/088
摘要： A method (800) to detect a hotword in a spoken utterance (120) includes receiving a sequence of input frames (210) characterizing streaming multi-channel audio (118). Each channel (119) of the streaming multi-channel audio includes respective audio features (510) captured by a separate dedicated microphone (107) for each input frame, the method includes processing, using a three-dimensional (3D) single value decomposition filter (SVDF) input layer (302) of a memorized neural network (300), the respective audio features of each channel in parallel and generating a corresponding multi-channel audio feature representation (420) based on a concatenation of the respective audio features (344). The method also includes generating, using sequentially- stacked SVDF layers (350), a probability score (360) indicating a presence of a hotword in the audio. The method also includes determining whether the probability score satisfies a threshold and, when satisfied, initiating a wake-up process on a user device (102).

6. 发明公开

EP4104168A1 CASCADE ARCHITECTURE FOR NOISE-ROBUST KEYWORD SPOTTING 有权
公开(公告)号：EP4104168A1
公开(公告)日：2022-12-21
申请号：EP20722879.2
申请日：2020-04-08
申请人： Google LLC
发明人： HUANG, Yiteng , GRUENSTEIN, Alexander, H.
IPC分类号： G10L15/22 , G10L15/08 , G06F3/16 , G10L15/05 , G10L21/0208

7. 发明公开

EP4447046A2 CASCADE ARCHITECTURE FOR NOISE-ROBUST KEYWORD SPOTTING 审中-实审
公开(公告)号：EP4447046A2
公开(公告)日：2024-10-16
申请号：EP24197532.5
申请日：2020-04-08
申请人： Google LLC
发明人： HUANG, Yiteng , GRUENSTEIN, Alexander, H.
IPC分类号： G10L21/0208
CPC分类号： G10L15/22 , G10L2015/22320130101 , G10L2015/08820130101 , G06F3/167 , G10L15/05 , G10L21/0208
摘要： A method (400) includes receiving, at a first processor (110) of a user device (102), streaming multi-channel audio (118) captured by an array of microphones (107), each channel (119) including respective audio features. For each channel, the method also includes processing, by the first processor, using a first stage hotword detector (210), the respective audio features to determine whether a hotword is detected. When the first stage hotword detector detects the hotword, the method also includes the first processor providing chomped raw audio data (212) to a second processor that processes, using a first noise cleaning algorithm (250), the chomped raw audio data to generate a clean monophonic audio chomp (260). The method also includes processing, by the second processor using a second stage hotword detector (220), the clean monophonic audio chomp to detect the hotword.

8. 发明公开

EP4066237A1 SMALL FOOTPRINT MULTI-CHANNEL KEYWORD SPOTTING 有权
公开(公告)号：EP4066237A1
公开(公告)日：2022-10-05
申请号：EP20706877.6
申请日：2020-01-15
申请人： Google LLC
发明人： WU, Jilong , HUANG, Yiteng
IPC分类号： G10L15/16 , G10L15/28

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