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公开(公告)号：US20170154620A1
公开(公告)日：2017-06-01
申请号：US14955599
申请日：2015-12-01
CPC分类号： G10L15/16 , G06F3/162 , G10L15/02 , G10L15/28 , G10L2015/025 , G10L2015/088
摘要： The present invention relates to a microphone assembly comprising a phoneme recognizer. The phoneme recognizer comprises an artificial neural network (ANN) comprising at least one phoneme expect pattern and a digital processor configured to repeatedly applying one or more sets of frequency components derived from a digital filter bank to respective inputs of an artificial neural network. The artificial neural network is configured to detect and indicate a match between the at least one phoneme expect pattern and the one or more sets of frequency components.
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公开(公告)号：US20150043755A1
公开(公告)日：2015-02-12
申请号：US14522158
申请日：2014-10-23
发明人： Claus Erdmann Fürst , Henrik Thomsen , Michael Deruginsky , Dibyendu Nandy , Oddy Nopporn Khamharn
CPC分类号： H04R17/02 , G06F1/324 , G06F1/325 , G10L15/00 , G10L25/78 , H04R1/08 , H04R3/00 , H04R19/005 , H04R19/04 , H04R2201/003 , Y02D10/126
摘要： A microphone includes a microelectromechanical system (MEMS) circuit and an integrated circuit. The MEMS circuit is configured to convert a voice signal into an electrical signal, and the integrated circuit is coupled to the MEMS circuit and is configured to receive the electrical signal. The integrated circuit and the MEMS circuit receive a clock signal from an external host. The clock signal is effective to cause the MEMS circuit and integrated circuit to operate in full system operation mode during a first time period and in a voice activity mode of operation during a second time period. The voice activity mode has a first power consumption and the full system operation mode has a second power consumption. The first power consumption is less than the second power consumption. The integrated circuit is configured to generate an interrupt upon the detection of voice activity, and send the interrupt to the host.
摘要翻译： 麦克风包括微机电系统（MEMS）电路和集成电路。 MEMS电路被配置为将语音信号转换成电信号，并且集成电路耦合到MEMS电路并且被配置为接收电信号。 集成电路和MEMS电路从外部主机接收时钟信号。 时钟信号有效地使得MEMS电路和集成电路在第一时间段期间和在第二时间段内处于语音活动操作模式下以全系统操作模式操作。 语音活动模式具有第一功率消耗，并且全系统操作模式具有第二功耗。 第一功耗小于第二功耗。 集成电路配置为在检测到语音活动时产生中断，并将中断发送到主机。
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公开(公告)号：US20220014855A1
公开(公告)日：2022-01-13
申请号：US17283460
申请日：2019-10-08
摘要： The present disclosure relates to an integrated circuit connectable to a microelectromechanical system (MEMS) transducer. The MEMS transducer is configured to generate a transducer audio signal in response to sound. The integrated circuit comprises a digital scrambling circuit coupled to a data communication interface. The digital scrambling circuit is configured to convert a digital audio stream, representative of the transducer audio signal, into a corresponding scrambled data stream. The integrated circuit additionally comprises a data bus interface coupled to the digital scrambling circuit and configured to output the scrambled data stream.
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公开(公告)号：US20200162823A1
公开(公告)日：2020-05-21
申请号：US16752673
申请日：2020-01-26
发明人： Claus Erdmann Fürst , Henrik Thomsen , Michael Deruginsky , Dibyendu Nandy , Oddy Nopporn Khamharn , Aziz Yurttas , Svetslav Gueorguiev , Anders Mortensen
IPC分类号： H04R17/02 , H04R19/04 , H04R3/00 , H04R1/08 , H04R19/00 , G06F1/3234 , G10L15/00 , G06F1/3215 , G06F1/3206
摘要： The present disclosure relates generally to a microphone assembly. The microphone assembly has an acoustic activity detection mode of operation when the electrical circuit is clocked using an internal clock signal generator in the absence of an external clock signal at a host interface, and an electrical circuit of the microphone assembly is configured to provide an interrupt signal to the host interface upon detection of acoustic activity by the electrical circuit. The electrical circuit is configured to control the operating mode of the microphone assembly based on a frequency of the external clock signal in response to providing the interrupt signal and is configured to provide data representing the electrical signal to the host interface using the external clock signal received at the host interface.
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公开(公告)号：US20190387326A1
公开(公告)日：2019-12-19
申请号：US16445088
申请日：2019-06-18
发明人： Kristian Adelbert Hansen , Henrik Thomsen , Mohammad Shajaan , Jens Tingleff , Claus Erdmann Fürst
摘要： A microphone assembly comprising: a housing including a base, a cover, and a sound port; a MEMS transducer element disposed in the housing, the transducer element configured to convert sound into a microphone signal voltage at a transducer output; and a processing circuit. The processing circuit comprising a transconductance amplifier comprising an input node connected to the transducer output for receipt of the microphone signal voltage, the transconductance amplifier being configured to generate an amplified current signal representative of the microphone signal voltage in accordance with a predetermined transconductance of the transconductance amplifier; and an analog-to-digital converter comprising an input node connected to receive the amplified current signal, said analog-to-digital converter being configured to sample and quantize the amplified current signal to generate a corresponding digital microphone signal.
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公开(公告)号：US10165359B2
公开(公告)日：2018-12-25
申请号：US15892341
申请日：2018-02-08
IPC分类号： H04R3/00 , H04R19/04 , H04R1/08 , G10L21/0232 , G10L21/0216 , H03M7/30
摘要： The disclosure relates to a microphone assembly including a multibit analog-to-digital converter configured to generate N-bit samples representative of a microphone signal. The microphone assembly also includes a first digital-to-digital converter configured to generate a corresponding M-bit digital signal based on N-bit digital samples, wherein N and M are positive integers and N>M. The microphone assembly may include a data interface configured to repeatedly receive samples of the M-bit digital signal and write bits of the M-bit digital signal to a data frame.
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公开(公告)号：US09830913B2
公开(公告)日：2017-11-28
申请号：US14861113
申请日：2015-09-22
发明人： Henrik Thomsen , Dibyendu Nandy
IPC分类号： G10L15/00 , G10L17/02 , G10L15/22 , H04W4/16 , G10L15/08 , G10L19/02 , G10L25/21 , H04R3/00 , H04R19/04 , G10L25/78
CPC分类号： G10L17/02 , G10L15/08 , G10L15/22 , G10L19/0204 , G10L25/21 , G10L25/78 , G10L2015/088 , H04R3/005 , H04R19/04 , H04W4/16
摘要： A microphone assembly includes an acoustic sensor and a voice activity detector on an integrated circuit coupled to an external-device interface. The acoustic sensor produces an electrical signal representative of acoustic energy detected by the sensor. A filter bank separates data representative of the acoustic energy into a plurality of frequency bands. A power tracker obtains a power estimate for at least one band, including a first estimate based on relatively fast changes in a power metric of the data and a second estimate based on relatively slow changes in a power metric of the data. The presence of voice activity in the electrical signal is based upon the power estimate.
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公开(公告)号：US20170061963A1
公开(公告)日：2017-03-02
申请号：US15259473
申请日：2016-09-08
发明人： Dibyendu Nandy , Yang Li , Ramanujapuram Raghuvir , Robert A. Popper , Andrzej Pawlowski , Kim Spetzler Berthelsen , Henrik Thomsen , Niel D. Warren , David P. Rossum
CPC分类号： G10L15/22 , G06F1/3206 , G10L15/30 , G10L25/48 , G10L25/78 , H04R3/00 , H04R3/005 , H04R19/04 , H04R2201/003
摘要： At a microphone, voice activity is detected in a data stream while simultaneously buffering audio data from the data stream to create buffered data. A signal is sent to a host indicating the positive detection of voice activity in the data stream. When an external clock signal is received from the host, the internal operation of the microphone is synchronized with the external clock signal. Buffered data stream is selectively sent through a first path, the first path including a buffer having a buffer delay time representing the time the first data stream takes to move through the buffer. The data stream is continuously sent through a second path as a real-time data stream, the second path not including the buffer, the real-time data stream beginning with the extended buffer data at a given instant in time. The buffered data stream and the real-time data stream are multiplexed onto a single data line and transmitting the multiplexed data stream to the host.
摘要翻译： 在麦克风上，在数据流中检测到语音活动，同时从数据流缓冲音频数据以创建缓冲数据。 信号被发送到主机，指示数据流中的语音活动的肯定检测。 当从主机接收到外部时钟信号时，麦克风的内部操作与外部时钟信号同步。 缓冲数据流被选择性地通过第一路径发送，第一路径包括缓冲器，缓冲器具有表示第一数据流在缓冲器中移动的时间的缓冲延迟时间。 数据流通过第二路径作为实时数据流连续发送，第二路径不包括缓冲器，在给定时刻从扩展缓冲器数据开始的实时数据流。 将缓冲的数据流和实时数据流复用到单个数据线上，并将多路复用的数据流发送到主机。
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公开(公告)号：US09478234B1
公开(公告)日：2016-10-25
申请号：US14797310
申请日：2015-07-13
发明人： Dibyendu Nandy , Yang Li , Ramanujapuram Raghuvir , Robert A. Popper , Andrzej Pawlowski , Kim Spetzler Berthelsen , Henrik Thomsen , Niel D. Warren , David P. Rossum
CPC分类号： G10L15/22 , G06F1/3206 , G10L15/30 , G10L25/48 , G10L25/78 , H04R3/00 , H04R3/005 , H04R19/04 , H04R2201/003
摘要： At a microphone, voice activity is detected in a data stream while simultaneously buffering audio data from the data stream to create buffered data. A signal is sent to a host indicating the positive detection of voice activity in the data stream. When an external clock signal is received from the host, the internal operation of the microphone is synchronized with the external clock signal. Buffered data stream is selectively sent through a first path, the first path including a buffer having a buffer delay time representing the time the first data stream takes to move through the buffer. The data stream is continuously sent through a second path as a real-time data stream, the second path not including the buffer, the real-time data stream beginning with the extended buffer data at a given instant in time. The buffered data stream and the real-time data stream are multiplexed onto a single data line and transmitting the multiplexed data stream to the host.
摘要翻译： 在麦克风上，在数据流中检测到语音活动，同时从数据流缓冲音频数据以创建缓冲数据。 信号被发送到主机，指示数据流中的语音活动的肯定检测。 当从主机接收到外部时钟信号时，麦克风的内部操作与外部时钟信号同步。 缓冲数据流被选择性地通过第一路径发送，第一路径包括缓冲器，缓冲器具有表示第一数据流在缓冲器中移动的时间的缓冲延迟时间。 数据流通过第二路径作为实时数据流连续发送，第二路径不包括缓冲器，在给定时刻从扩展缓冲器数据开始的实时数据流。 将缓冲的数据流和实时数据流复用到单个数据线上，并将多路复用的数据流发送到主机。
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公开(公告)号：US11564041B2
公开(公告)日：2023-01-24
申请号：US17283460
申请日：2019-10-08
摘要： The present disclosure relates to an integrated circuit connectable to a microelectromechanical system (MEMS) transducer. The MEMS transducer is configured to generate a transducer audio signal in response to sound. The integrated circuit comprises a digital scrambling circuit coupled to a data communication interface. The digital scrambling circuit is configured to convert a digital audio stream, representative of the transducer audio signal, into a corresponding scrambled data stream. The integrated circuit additionally comprises a data bus interface coupled to the digital scrambling circuit and configured to output the scrambled data stream.
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