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1. 发明授权

US09379751B2 Noise canceling system and method, smart control method and device and communication equipment 有权
标题翻译：降噪系统及方法，智能控制方法及设备及通讯设备
公开(公告)号：US09379751B2
公开(公告)日：2016-06-28
申请号：US14119611
申请日：2011-11-08
申请人： Song Liu , Jian Zhao , Shasha Lou
发明人： Song Liu , Jian Zhao , Shasha Lou
IPC分类号： A61F11/06 , G10K11/16 , H03B29/00 , H04B1/12 , H04R1/10 , H04R3/02
CPC分类号： H04B1/12 , H04R1/1083 , H04R3/02 , H04R2410/05 , H04R2460/01 , H04R2499/13
摘要： The present invention discloses a noise canceling system and method, a smart control method and device and a communication equipment. Said smart control method includes: when it is detected there is no voice signal output at a receiving end of a communication equipment, receiving an outside noise signal from a reference microphone away from ears and a detection signal from a monitoring microphone near ears; implementing performance analysis on said received outside noise signal and said detection signal to estimate a noise reduction performance curve after said feed-forward active noise cancellation; and regulating parameters of the control circuit in said feed-forward active noise cancellation according to said estimated noise reduction performance curve and the preset noise reduction performance curve to make a difference between said estimated noise reduction performance curve and said preset noise reduction performance curve within a preset range.
摘要翻译：本发明公开了一种噪声消除系统和方法，智能控制方法和装置以及通信设备。所述智能控制方法包括：当检测到通信设备的接收端没有语音信号输出时，从参考麦克风远离耳朵接收外部噪声信号和从耳朵附近的监测麦克风接收的检测信号; 对所述接收的外部噪声信号和所述检测信号执行性能分析，以估计所述前馈有源噪声消除之后的噪声降低性能曲线; 以及根据所述估计的噪声降低性能曲线和预设的降噪性能曲线来调节所述前馈有源噪声消除中的控制电路的参数，以使所述估计的降噪性能曲线与所述预设噪声降低性能曲线之间的差异预设范围。

2. 发明申请

US20140141724A1 NOISE CANCELING SYSTEM AND METHOD, SMART CONTROL METHOD AND DEVICE AND COMMUNICATION EQUIPMENT 有权
标题翻译：噪声消除系统和方法，智能控制方法和设备和通信设备
公开(公告)号：US20140141724A1
公开(公告)日：2014-05-22
申请号：US14119611
申请日：2011-11-08
申请人： Song Liu , Jian Zhao , Shasha Lou
发明人： Song Liu , Jian Zhao , Shasha Lou
IPC分类号： H04B1/12
CPC分类号： H04B1/12 , H04R1/1083 , H04R3/02 , H04R2410/05 , H04R2460/01 , H04R2499/13
摘要： The present invention discloses a noise canceling system and method, a smart control method and device and a communication equipment. Said smart control method includes: when it is detected there is no voice signal output at a receiving end of a communication equipment, receiving an outside noise signal from a reference microphone away from ears and a detection signal from a monitoring microphone near ears; implementing performance analysis on said received outside noise signal and said detection signal to estimate a noise reduction performance curve after said feed-forward active noise cancellation; and regulating parameters of the control circuit in said feed-forward active noise cancellation according to said estimated noise reduction performance curve and the preset noise reduction performance curve to make a difference between said estimated noise reduction performance curve and said preset noise reduction performance curve within a preset range.
摘要翻译：本发明公开了一种噪声消除系统和方法，智能控制方法和装置以及通信设备。所述智能控制方法包括：当检测到通信设备的接收端没有语音信号输出时，从参考麦克风远离耳朵接收外部噪声信号和从耳朵附近的监测麦克风接收的检测信号; 对所述接收的外部噪声信号和所述检测信号执行性能分析，以估计所述前馈有源噪声消除之后的噪声降低性能曲线; 以及根据所述估计的噪声降低性能曲线和预设的降噪性能曲线来调节所述前馈有源噪声消除中的控制电路的参数，以使所述估计的降噪性能曲线与所述预设噪声降低性能曲线之间的差异预设范围。

3. 发明申请

US20130151247A1 METHOD AND DEVICE FOR SUPPRESSING RESIDUAL ECHOES 有权
标题翻译：用于抑制残余电子的方法和装置
公开(公告)号：US20130151247A1
公开(公告)日：2013-06-13
申请号：US13642661
申请日：2011-10-24
申请人： Shasha Lou , Bo Li , Song Liu
发明人： Shasha Lou , Bo Li , Song Liu
IPC分类号： G10L21/0216
CPC分类号： G10L21/0216 , G10L15/20 , G10L2021/02082 , H04M9/082 , H04R3/005 , H04R2201/109 , H04R2499/13
摘要： The present invention discloses a method and a device for suppressing residual echoes. The method comprises: performing adaptive filtering on M transmitter signals respectively to obtain M adaptive filtered signals; performing array-filtering on the M−1 adaptive filtered signals other than the first adaptive filtered signal to obtain M−1 array-filter output signals; subtracting each of the M−1 array-filter output signals from the first adaptive filtered signal respectively to obtain M−1 difference signals, performing time-domain/frequency-domain conversion on the M−1 difference signals respectively and selecting one of the frequency-domain signals that has the least energy; performing time-domain/frequency-domain conversion on the first adaptive filtered signal and the Mth adaptive filtered signal and then performing speech probability filtering on the converted first adaptive filtered signal and the converted Mth adaptive filtered signal to obtain one frequency-domain speech probability signal; and multiplying the frequency-domain speech probability signal with the selected signal that has the least energy, and performing frequency-domain/time-domain conversion on the multiplication result to obtain a signal as a transmitter output signal. The technical solutions of the present invention can suppress the residual echoes effectively without impairing near end speech.
摘要翻译：本发明公开了一种用于抑制残余回波的方法和装置。该方法包括：分别对M个发射机信号执行自适应滤波，以获得M个自适应滤波信号; 对除了第一自适应滤波信号之外的M-1个自适应滤波信号执行阵列滤波以获得M-1个阵列滤波器输出信号; 分别从第一自适应滤波信号中减去M-1阵列滤波器输出信号中的每一个以获得M-1个差分信号，分别对M-1个差信号执行时域/频域转换，并选择频率具有最少能量的域信号; 对第一自适应滤波信号和第M个自适应滤波信号执行时域/频域转换，然后对经转换的第一自适应滤波信号和转换的第M个自适应滤波信号执行语音概率滤波，以获得一个频域语音概率信号 ; 并且将频域语音概率信号与所选择的具有最少能量的信号相乘，并对乘法结果执行频域/时域转换，以获得作为发射机输出信号的信号。本发明的技术方案可以有效地抑制残留回波，而不损害近端语音。

4. 发明申请

US20120136654A1 Apparatus And Method For Cancelling Echo In Joint Time Domain And Frequency Domain 有权
标题翻译：在联合时域和频域中消除回波的装置和方法
公开(公告)号：US20120136654A1
公开(公告)日：2012-05-31
申请号：US13389367
申请日：2010-12-22
申请人： Shasha Lou , Song Liu
发明人： Shasha Lou , Song Liu
IPC分类号： G10L19/14
CPC分类号： H04M9/082 , H04B3/23
摘要： Disclosed in the present invention is a method for cancelling echo in joint time domain and frequency domain. The method includes: receiving an input receiver signal and an input transmitter signal; implementing echo cancellation on the received transmitter signal, based on the received receiver signal, by using a first echo canceller which is either a time domain echo canceller or a frequency domain echo canceller, to obtain a first echo-cancelled signal; implementing echo cancellation again on the first echo-cancelled signal, based on the received receiver signal, by using a second echo canceller which is the other one of the time domain echo canceller and the frequency domain echo canceller, to obtain a second echo-cancelled signal; wherein, the filter parameters of the second filter of the second echo canceller is updated based on the second echo-cancelled signal, and the first and second echo canceller respectively include the corresponding first and second filters. By using said method in the present invention, fast response to echo reflecting environment can be achieved with little residual echo, thus the effect of echo cancellation is entirely improved.
摘要翻译：在本发明中公开了一种消除联合时域和频域中的回波的方法。该方法包括：接收输入接收机信号和输入发射机信号; 通过使用作为时域回波消除器或频域回波消除器的第一回波消除器，基于接收到的接收机信号，对所接收的发射机信号实现回波消除，以获得第一回声消除信号; 通过使用作为时域回波消除器和频域回波消除器中的另一个的第二回波消除器，基于接收到的接收器信号，在第一回波消除信号上再次实现回波消除，以获得第二回声消除信号; 其中，基于所述第二回波消除信号来更新所述第二回波消除器的所述第二滤波器的滤波器参数，并且所述第一和第二回波消除器分别包括相应的第一和第二滤波器。通过使用本发明的方法，可以实现对回波反射环境的快速响应，具有很少的残余回波，从而完全改善了回声消除的效果。

5. 发明授权

US09685172B2 Method and device for suppressing residual echoes based on inverse transmitter receiver distance and delay for speech signals directly incident on a transmitter array 有权
公开(公告)号：US09685172B2
公开(公告)日：2017-06-20
申请号：US13642661
申请日：2011-10-24
申请人： Shasha Lou , Bo Li , Song Liu
发明人： Shasha Lou , Bo Li , Song Liu
IPC分类号： H04M9/08 , G10L15/00 , G10L21/0216 , G10L15/20 , H04R3/00 , G10L21/0208
CPC分类号： G10L21/0216 , G10L15/20 , G10L2021/02082 , H04M9/082 , H04R3/005 , H04R2201/109 , H04R2499/13
摘要： The present invention discloses a method and a device for suppressing residual echoes. The method comprises: performing adaptive filtering on M transmitter signals respectively to obtain M adaptive filtered signals; performing array-filtering 5 on the M−1 adaptive filtered signals other than the first adaptive filtered signal to obtain M−1 array-filter output signals by considering relative positions of the receiver and each of the transmitters and the time delay attributed to distances between the transmitters and the receiver; subtracting each of the M−1 array-filter output signals from the first adaptive filtered signal respectively to obtain M−1 difference signals, performing time-domain/frequency-domain conversion on the M−1 difference signals respectively and selecting one of the frequency-domain signals that has the least energy; performing time-domain/frequency-domain conversion on the first adaptive filtered signal and the Mth adaptive filtered signal and then performing speech probability filtering on the converted first adaptive filtered signal and the converted Mth adaptive filtered signal to obtain one frequency-domain speech probability signal; and multiplying the frequency-domain speech probability signal with the selected signal that has the least energy, and performing frequency-domain/time-domain conversion on the multiplication result to obtain a signal as a transmitter output signal. The technical solutions of the present invention can suppress the residual echoes effectively without impairing near end speech.

6. 发明授权

US08868416B2 Apparatus and method for cancelling echo in joint time domain and frequency domain 有权
标题翻译：联合时域和频域消除回波的装置和方法
公开(公告)号：US08868416B2
公开(公告)日：2014-10-21
申请号：US13389367
申请日：2010-12-22
申请人： Shasha Lou , Song Liu
发明人： Shasha Lou , Song Liu
IPC分类号： G10L21/00 , G10L21/02 , H04M9/08 , H04B3/23
CPC分类号： H04M9/082 , H04B3/23
摘要： Disclosed in the present invention is a method for cancelling echo in joint time domain and frequency domain. The method includes: receiving an input receiver signal and an input transmitter signal; implementing echo cancellation on the received transmitter signal, based on the received receiver signal, by using a first echo canceller which is either a time domain echo canceller or a frequency domain echo canceller, to obtain a first echo-cancelled signal; implementing echo cancellation again on the first echo-cancelled signal, based on the received receiver signal, by using a second echo canceller which is the other one of the time domain echo canceller and the frequency domain echo canceller, to obtain a second echo-cancelled signal; wherein, and the first and second echo canceller respectively include the corresponding first and second filters, and the filter parameter of the second filter is updated based on the input receiver signal, the second echo-cancelled signal and the filter parameter of the first filter. By using said method in the present invention, fast response to echo reflecting environment can be achieved with little residual echo, thus the effect of echo cancellation is entirely improved.
摘要翻译：在本发明中公开了一种消除联合时域和频域中的回波的方法。该方法包括：接收输入接收机信号和输入发射机信号; 通过使用作为时域回波消除器或频域回波消除器的第一回波消除器，基于接收到的接收机信号，对所接收的发射机信号实现回波消除，以获得第一回声消除信号; 通过使用作为时域回波消除器和频域回波消除器中的另一个的第二回波消除器，基于接收到的接收器信号，在第一回波消除信号上再次实现回波消除，以获得第二回声消除信号; 其中，第一和第二回波消除器分别包括对应的第一和第二滤波器，并且基于输入的接收机信号，第二回波消除信号和第一滤波器的滤波器参数来更新第二滤波器的滤波器参数。通过使用本发明的方法，可以实现对回波反射环境的快速响应，具有很少的残余回波，从而完全改善了回声消除的效果。

7. 发明授权

US09484042B2 Speech enhancing method, device for communication earphone and noise reducing communication earphone 有权
标题翻译：语音增强方法，通信耳机和降噪通信耳机的设备
公开(公告)号：US09484042B2
公开(公告)日：2016-11-01
申请号：US14110879
申请日：2012-03-16
申请人： Song Liu , Bo Li , Jian Zhao
发明人： Song Liu , Bo Li , Jian Zhao
IPC分类号： G10L15/20 , G10L21/02 , G10L21/0208 , H04R1/10 , H04R3/00
CPC分类号： G10L21/0208 , H04R1/1041 , H04R1/1083 , H04R3/005 , H04R2410/01 , H04R2410/05
摘要： The present invention provides a speech enhancing method for communication earphone including two parts: sending end noise reduction processing and receiving end noise reduction processing, wherein the sending end noise reduction processing part includes: determining a wearing condition of the earphone by comparing energy difference of sound signals picked up by microphones of the communication earphone; if the earphone is normally worn, subjecting the sound signal first to multi-microphone noise reduction and then to single channel noise reduction to further suppress residuary stationary noise; otherwise suppressing stationary noise in the sound signal by single channel noise reduction directly.
摘要翻译：本发明提供了一种用于通信耳机的语音增强方法，包括两个部分：发送端降噪处理和接收端降噪处理，其中发送端噪声降低处理部分包括：通过比较声音的能量差来确定耳机的佩戴状况由通信耳机的麦克风拾取的信号; 如果耳机通常佩戴，首先对声音信号进行多麦克风降噪，然后进行单声道降噪，以进一步抑制残留的静噪; 否则直接通过单声道降噪来抑制声音信号中的静止噪声。

8. 发明授权

US09240195B2 Speech enhancing method and device, and denoising communication headphone enhancing method and device, and denoising communication headphones 有权
标题翻译：语音增强方法和设备，以及去噪通信耳机增强方法和设备，以及去噪通信耳机
公开(公告)号：US09240195B2
公开(公告)日：2016-01-19
申请号：US13637715
申请日：2011-11-25
申请人： Jian Zhao , Song Liu , Bo Li , Yang Hua
发明人： Jian Zhao , Song Liu , Bo Li , Yang Hua
IPC分类号： G10L21/00 , G10L21/0208 , H04R3/00 , G10L21/0216 , H04R1/08
CPC分类号： G10L21/0208 , G10L2021/02165 , H04R1/083 , H04R3/005 , H04R2201/107 , H04R2410/05
摘要： The present invention discloses a speech enhancing method, a speech enhancing device and a denoising communication headphone. In the solutions of the present invention, a first sound signal that comprises a user's speech signal transmitted through coupling vibration and an ambient noise signal transmitted through the air and a second sound signal that is mainly an ambient noise signal transmitted through the air are picked up by a primary vibration microphone and a secondary vibration microphone, respectively, that have a specific relative positional relationship therebetween, and the ambient noise signals picked up by the two vibration microphones are correlated with each other; a control parameter used to control an updating speed of an adaptive filter is determined according to the first sound signal and the second sound signal; the first sound signal is denoised and filtered according to the second sound signal and the control parameter; and the denoised and filtered speech signal is further denoised and speech high-frequency enhancement is performed thereon. The technical solutions of the present invention can effectively improve the signal to noise ratio (SNR) and the quality of speech in an environment of highly intense noises.
摘要翻译：本发明公开了一种语音增强方法，语音增强装置和去噪通信耳机。在本发明的解决方案中，拾取包括通过耦合振动发送的用户语音信号和通过空气传输的环境噪声信号的第一声音信号和主要通过空气传输的环境噪声信号的第二声音信号通过分别具有特定相对位置关系的主振动麦克风和二次振动麦克风，并且由两个振动麦克风拾取的环境噪声信号彼此相关; 根据第一声音信号和第二声音信号确定用于控制自适应滤波器的更新速度的控制参数; 根据第二声音信号和控制参数对第一声音信号进行去噪和滤波; 并且去噪和滤波的语音信号被进一步去噪，并且在其上执行语音高频增强。本发明的技术方案可以在高度强烈的噪声环境中有效提高信噪比（SNR）和语音质量。

9. 发明申请

US20130024194A1 SPEECH ENHANCING METHOD AND DEVICE, AND NENOISING COMMUNICATION HEADPHONE ENHANCING METHOD AND DEVICE, AND DENOISING COMMUNICATION HEADPHONES 有权
标题翻译：语音增强方法和设备，以及通信通信耳机增强方法和设备，以及通信通信耳机
公开(公告)号：US20130024194A1
公开(公告)日：2013-01-24
申请号：US13637715
申请日：2011-11-25
申请人： Jian Zhao , Song Liu , Bo Li , Yang Hua
发明人： Jian Zhao , Song Liu , Bo Li , Yang Hua
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L2021/02165 , H04R1/083 , H04R3/005 , H04R2201/107 , H04R2410/05
摘要： The present invention discloses a speech enhancing method, a speech enhancing device and a denoising communication headphone. In the solutions of the present invention, a first sound signal that comprises a user's speech signal transmitted through coupling vibration and an ambient noise signal transmitted through the air and a second sound signal that is mainly an ambient noise signal transmitted through the air are picked up by a primary vibration microphone and a secondary vibration microphone, respectively, that have a specific relative positional relationship therebetween, and the ambient noise signals picked up by the two vibration microphones are correlated with each other; a control parameter used to control an updating speed of an adaptive filter is determined according to the first sound signal and the second sound signal; the first sound signal is denoised and filtered according to the second sound signal and the control parameter; and the denoised and filtered speech signal is further denoised and speech high-frequency enhancement is performed thereon. The technical solutions of the present invention can effectively improve the signal to noise ratio (SNR) and the quality of speech in an environment of highly intense noises.
摘要翻译：本发明公开了一种语音增强方法，语音增强装置和去噪通信耳机。在本发明的解决方案中，拾取包括通过耦合振动发送的用户语音信号和通过空气传输的环境噪声信号的第一声音信号和主要通过空气传输的环境噪声信号的第二声音信号通过分别具有特定相对位置关系的主振动麦克风和二次振动麦克风，并且由两个振动麦克风拾取的环境噪声信号彼此相关; 根据第一声音信号和第二声音信号确定用于控制自适应滤波器的更新速度的控制参数; 根据第二声音信号和控制参数对第一声音信号进行去噪和滤波; 并且去噪和滤波的语音信号被进一步去噪，并且在其上执行语音高频增强。本发明的技术方案可以在高度强烈的噪声环境中有效提高信噪比（SNR）和语音质量。

10. 发明申请

US20190040418A1 Method of Operation of a Syngas Fermentation Process 审中-公开
公开(公告)号：US20190040418A1
公开(公告)日：2019-02-07
申请号：US16158508
申请日：2018-10-12
申请人： Syrona Scott , Song Liu , Ching-Whan Ko
发明人： Syrona Scott , Song Liu , Ching-Whan Ko
IPC分类号： C12P7/06 , C12N1/20 , C12P7/08
摘要： A process is provided for fermentation of syngas that is effective for reducing conductivity and providing an alcohol STY of about 10 g ethanol/(L·day). The process includes introducing the syngas into a reactor vessel and providing a nitrogen feed rate to the reactor vessel of about 100 mg or more nitrogen/gram of cells produced. Fermentation of the syngas is effective for providing a fermentation medium having an average conductivity of about 16 mS/cm or less and an STY of 10 g ethanol/(L·day) or more.

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