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公开(公告)号：US09712923B2
公开(公告)日：2017-07-18
申请号：US14282101
申请日：2014-05-20
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.
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公开(公告)号：US09113263B2
公开(公告)日：2015-08-18
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：US20150112689A1
公开(公告)日：2015-04-23
申请号：US14512877
申请日：2014-10-13
发明人： Dibyendu Nandy , Yang Li , Henrik Thomsen , Claus Furst
IPC分类号： G10L15/20 , G10L19/002
CPC分类号： G10L15/20 , G06F1/32 , G10L15/28 , G10L19/002 , G10L25/84 , G10L2015/088
摘要： Streaming audio is received. The streaming audio includes a frame having plurality of samples. An energy estimate is obtained for the plurality of samples. The energy estimate is compared to at least one threshold. In addition, a band pass estimate of the signal is determined. An energy estimate is obtained for the band-passed plurality of samples. The two energy estimates are compared to at least one threshold each. Based upon the comparison operation, a determination is made as to whether speech is detected.
摘要翻译： 接收流音频。 流式音频包括具有多个样本的帧。 对于多个样本获得能量估计。 将能量估计与至少一个阈值进行比较。 此外，确定信号的带通估计。 对带通的多个样本获得能量估计。 将两个能量估计值与至少一个阈值进行比较。 基于比较操作，确定是否检测到语音。
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公开(公告)号：US20150055799A1
公开(公告)日：2015-02-26
申请号：US14533674
申请日：2014-11-05
发明人： Dibyendu Nandy , Robert A. Popper , Yang Li , Sarmad Qutub , Claus Erdmann Furst , Henrik Thomsen
CPC分类号： H04R1/08 , G10L15/00 , G10L25/78 , G10L2021/02161 , H04R3/005 , H04R19/005 , H04R19/04 , H04R2499/11
摘要： First analog signals are received from a first microphone, converted into first digital data and stored in a first buffer. A determination is made as to whether voice activity has occurred when voice activity is determined, a voice activity detect signal is sent to an external processor. The external processor responsively provides an exterior clock signal upon receiving the voice activity detect signal. Second analog signals are received from a second microphone, converted into second digital data and stored in a second buffer. The first digital data in the first buffer is not necessarily synchronized in real time with the second digital data in the second buffer. The first digital data from the first buffer and the second digital data from the second buffer is decimated using the external clock to provide decimated output data, the decimated output data having the first digital data and the second digital data aligned in real time.
摘要翻译： 从第一麦克风接收第一模拟信号，转换成第一数字数据并存储在第一缓冲器中。 确定在确定语音活动时语音活动是否发生，语音活动检测信号被发送到外部处理器。 外部处理器在接收到语音活动检测信号时响应地提供外部时钟信号。 从第二麦克风接收第二模拟信号，转换成第二数字数据并存储在第二缓冲器中。 第一缓冲器中的第一数字数据不一定与第二缓冲器中的第二数字数据实时同步。 来自第一缓冲器的第一数字数据和来自第二缓冲器的第二数字数据被使用外部时钟抽取以提供抽取的输出数据，具有第一数字数据和第二数字数据的抽取的输出数据实时对齐。
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公开(公告)号：US20140348345A1
公开(公告)日：2014-11-27
申请号：US14282101
申请日：2014-05-20
发明人： Claus Erdmann Fürst , Henrik Thomsen , Michael Deruginsky , Dibyendu Nandy , Oddy Nopporn Khamharn
IPC分类号： H04R3/00
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：US11172312B2
公开(公告)日：2021-11-09
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 , Svetoslav Radoslavov Gueorguiev , Anders Mortensen
IPC分类号： H04R17/02 , G10L15/00 , G06F1/3234 , H04R19/00 , H04R1/08 , H04R3/00 , H04R19/04 , G06F1/3206 , G06F1/3215 , G10L25/78 , G06F1/324
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：US11095990B2
公开(公告)日：2021-08-17
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：US10904672B2
公开(公告)日：2021-01-26
申请号：US16375193
申请日：2019-04-04
发明人： Mohammad Shajaan , Claus Erdmann Fürst , Per Flemming Høvesten , Kim Spetzler Berthelsen , Henrik Thomsen
摘要： A microphone assembly includes an acoustic filter with a first highpass cut-off frequency. The microphone assembly additionally includes a forward signal path and a feedback signal path. The forward signal path is configured to amplify or buffer an electrical signal generated by a transducer in response to sound and to convert the electrical signal to a digital signal. The feedback signal path is configured to generate a digital control signal based on the digital signal and to generate and output a sequence of variable current pulses based on the digital control signal. The variable current pulses suppress frequencies of the electrical signal below a second highpass cut-off frequency, higher than the first highpass cut-off frequency.
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公开(公告)号：US10257616B2
公开(公告)日：2019-04-09
申请号：US15216928
申请日：2016-07-22
发明人： Mohammad Shajaan , Claus Erdmann Fürst , Per Flemming Høvesten , Kim Spetzler Berthelsen , Henrik Thomsen
摘要： A microphone assembly includes an acoustic transducer element configured to convert sound into a microphone signal in accordance with a transducer frequency response including a first highpass cut-off frequency. The microphone assembly additionally includes a processing circuit including a signal amplification path configured to receive, sample and digitize the microphone signal to provide a digital microphone signal. A frequency response of the signal amplification path includes a second highpass cut-off frequency which is higher than the first highpass cut-off frequency of the acoustic transducer element.
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公开(公告)号：US09831844B2
公开(公告)日：2017-11-28
申请号：US14855557
申请日：2015-09-16
发明人： Aziz Yurrtas , Per Flemming Høvesten , Svetoslav Gueorguiev , Claus Erdmann Fürst , Henrik Thomsen
CPC分类号： H03G3/3005 , H03F3/183 , H04R1/04
摘要： Approaches are provided for an apparatus that includes an input buffer, an analog-to-digital converter coupled to the input buffer, a decompress module coupled to the analog to digital converter, and a gain control module coupled to the input buffer and the decompress module. The input buffer has a first adjustable gain and operating in the analog domain. The analog-to-digital converter converts the input analog data received from the input buffer into digital data. The decompress module operates in the digital domain, and is configured to decompress the digital data received from the analog-to-digital converter. The decompress module has a second adjustable gain and produces an output digital signal. The gain control module determines when to compensate for changes in characteristics the input analog data by selectively controlling the first gain of the input buffer in the analog domain and the second gain of the decompress module in the digital domain.
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