公开(公告)号：US10306389B2

公开(公告)日：2019-05-28

申请号：US14886077

申请日：2015-10-18

申请人： KOPIN CORPORATION

发明人： Dashen Fan ,  Xi Chen ,  Hua Bao ,  Eric Frederic Davis

IPC分类号： H04R29/00 ,  H04R1/32 ,  G10L19/008 ,  H04R3/00 ,  H04R1/02 ,  G10L21/0208 ,  G10L25/78 ,  G10L21/0216

摘要： Systems and methods are described to extract desired audio from an apparatus that is worn on a user's head. The apparatus includes a head wearable device. A first microphone is positioned on the head wearable device to receive a voice signal from the user A first signal from the first microphone is input as a main channel to a noise cancellation unit. A second microphone is coupled to the head wearable device. A first acoustic distance between the first microphone and the user's mouth is less than a second acoustic distance between the second microphone and the user's mouth when the head wearable device is on the user's head. A second signal from the second microphone is input as a reference channel to the noise cancellation unit. A first signal-to-noise ratio of the first signal is larger than a second signal-to-noise ratio of the second signal.

公开(公告)号：US20180359550A1

公开(公告)日：2018-12-13

申请号：US16107390

申请日：2018-08-21

申请人： Kopin Corporation

发明人： Dashen Fan ,  Jang Ho Kim ,  Yong Seok Seo ,  John C. C. Fan

IPC分类号： H04R1/08 ,  G10L99/00 ,  H04R1/00

CPC分类号： H04R1/08 ,  G10L99/00 ,  H04R1/005 ,  H04R2201/003

摘要： The invention is a multi-microphone voice processing SoC primarily for head worn applications. It bypasses the use of conventional pre-amp voice CODEC (ADC/DAC) chips all together by replacing their functionality with digital MEMS microphone(s) and digital speaker driver (DSD). Functionality necessary for speech recognition such as noise/echo cancellation, speech compression, speech feature extraction and lossless speech transmission are also integrated into the SoC. One embodiment is a noise cancellation chip for wired, battery powered headsets and earphones, as smart-phone accessory. Another embodiment is as a wireless Bluetooth noise cancellation companion chip. The invention can be used in headwear, eyewear glass, mobile wearable computing, heavy duty military, aviation and industrial headsets and other speech recognition applications in noisy environments.

公开(公告)号：US10070211B2

公开(公告)日：2018-09-04

申请号：US14318235

申请日：2014-06-27

申请人： Kopin Corporation

发明人： Dashen Fan ,  Jang Ho Kim ,  Yong Seok Seo ,  John C. C. Fan

IPC分类号： H04R1/06 ,  G10L99/00 ,  H04R1/08 ,  H04R1/00

摘要： The invention is a multi-microphone voice processing SoC primarily for head worn applications. It bypasses the use of conventional pre-amp voice CODEC (ADC/DAC) chips all together by replacing their functionality with digital MEMS microphone(s) and digital speaker driver (DSD). Functionality necessary for speech recognition such as noise/echo cancellation, speech compression, speech feature extraction and lossless speech transmission are also integrated into the SoC. One embodiment is a noise cancellation chip for wired, battery powered headsets and earphones, as smart-phone accessory. Another embodiment is as a wireless Bluetooth noise cancellation companion chip. The invention can be used in headwear, eyewear glass, mobile wearable computing, heavy duty military, aviation and industrial headsets and other speech recognition applications in noisy environments.

公开(公告)号：US09633670B2

公开(公告)日：2017-04-25

申请号：US14207163

申请日：2014-03-12

申请人： KOPIN CORPORATION

发明人： Dashen Fan

IPC分类号： G10L21/0208 ,  G10L25/78 ,  G10L21/0216

CPC分类号： G10L21/0208 ,  G10L25/78 ,  G10L2021/02165 ,  G10L2021/02166

摘要： Systems and methods are described to reduce undesired audio. An adaptive noise cancellation unit receives a main signal and a reference signal. The main signal has a main signal-to-noise ratio; the reference signal has a reference signal-to-noise ratio. The reference signal-to-noise ratio is less than the main signal-to-noise-ratio. The adaptive noise cancellation unit reduces undesired audio from the main signal. An output signal from the adaptive noise cancellation unit is input to a single channel noise cancellation unit. The single channel noise cancellation unit further reduces undesired audio from the output signal to provide mostly desired audio. A filter control creates a control signal from the main signal and the reference signal to control filtering in the adaptive noise cancellation unit and to control filtering in the single channel noise cancellation unit.

公开(公告)号：US20150006181A1

公开(公告)日：2015-01-01

申请号：US14318235

申请日：2014-06-27

申请人： Kopin Corporation

发明人： Dashen Fan ,  Jang Ho Kim ,  Yong Seok Seo ,  John C. C. Fan

IPC分类号： H04R1/08 ,  G10L99/00

CPC分类号： H04R1/08 ,  G10L99/00 ,  H04R1/005 ,  H04R2201/003

摘要： The invention is a multi-microphone voice processing SoC primarily for head worn applications. It bypasses the use of conventional pre-amp voice CODEC (ADC/DAC) chips all together by replacing their functionality with digital MEMS microphone(s) and digital speaker driver (DSD). Functionality necessary for speech recognition such as noise/echo cancellation, speech compression, speech feature extraction and lossless speech transmission are also integrated into the SoC. One embodiment is a noise cancellation chip for wired, battery powered headsets and earphones, as smart-phone accessory. Another embodiment is as a wireless Bluetooth noise cancellation companion chip. The invention can be used in headwear, eyewear glass, mobile wearable computing, heavy duty military, aviation and industrial headsets and other speech recognition applications in noisy environments.

摘要翻译： 本发明是主要用于头戴式应用的多麦克风语音处理SoC。 它通过用数字MEMS麦克风和数字扬声器驱动器（DSD）替换其功能，绕过常规的前置放大语音编解码器（ADC / DAC）芯片。 语音识别所需的功能，如噪声/回声消除，语音压缩，语音特征提取和无损语音传输也被集成到SoC中。 一个实施例是用于有线，电池供电的耳机和耳机的噪声消除芯片，作为智能手机附件。 另一个实施例是作为无线蓝牙噪声消除伴随芯片。 本发明可用于嘈杂环境中的头饰，眼镜玻璃，移动可佩戴计算，重型军事，航空和工业耳机等语音识别应用。

公开(公告)号：US20200294521A1

公开(公告)日：2020-09-17

申请号：US16420082

申请日：2019-05-22

申请人： KOPIN CORPORATION

发明人： Xi Chen ,  Dashen Fan

IPC分类号： G10L21/0208 ,  G02C11/00 ,  H04R3/00 ,  G02C11/06 ,  H04R29/00 ,  G10L19/008 ,  H04R1/32

摘要： Systems and methods are described to extract desired audio from an apparatus to be worn on a user's head. An apparatus includes a head wearable device and an array of at least three microphones. The at least three microphones are arranged along a plurality of at least two non-parallel axes. Selection logic is configured to identify a selected axis from the plurality and two microphones from the array that form the selected axis. A beamformer is configured to accept as inputs, signals from the two microphones and to output a main microphone channel and a reference microphone channel.

公开(公告)号：US10339952B2

公开(公告)日：2019-07-02

申请号：US15784102

申请日：2017-10-14

申请人： KOPIN CORPORATION

发明人： Dashen Fan

IPC分类号： G10L13/02 ,  G10L15/20 ,  G10L21/02 ,  G01N29/44 ,  G10L21/0232 ,  H03G3/00 ,  H04R3/00 ,  G10L25/84 ,  H03G7/00 ,  G10K11/00 ,  G10L21/0216 ,  G10L25/78

摘要： Systems and apparatuses are described to automatically balance acoustic channel sensitivity. A computer readable medium containing executable computer program instructions, which when executed by an acoustic signal processing system, cause the acoustic signal processing system to perform a process that includes calculating a long-term power level of a main acoustic signal to obtain an averaged main acoustic signal. Segments of the main acoustic signal are excluded from the averaged main acoustic signal using a desired voice activity detection signal. A long-term power level of a reference acoustic signal is calculated to obtain an averaged reference acoustic signal. Segments of the reference acoustic signal are excluded from the averaged reference acoustic signal using the desired voice activity detection signal. An amplitude correction signal is created using the averaged main acoustic signal and the averaged reference acoustic signal. The amplitude correction signal is used to adjust either the main acoustic signal or the reference acoustic signal to automatically balance acoustic channel sensitivity.

公开(公告)号：US20180034470A1

公开(公告)日：2018-02-01

申请号：US15225745

申请日：2016-08-01

申请人： KOPIN CORPORATION

发明人： Dashen Fan ,  Joseph Yong Kwon

IPC分类号： H03M1/12 ,  H04B7/06

CPC分类号： H03M1/1245 ,  H03M3/462 ,  H04B7/0617

摘要： Systems and methods are described to time delay a signal output from an analog-to-digital converter (ADC) The ADC includes a digital sensor responsive to an analog field quantity The digital sensor is configured to output an oversampled digital output signal at a sampling clock frequency. A time delay element is configured to receive as an input the oversampled digital output signal and to output a time delayed oversampled digital output signal. A filter is configured to receive as an input the delayed oversampled digital output signal. The fitter low pass filters and decimates tea lower sample rate the delayed oversampled digital output signal. An output includes a low pass filtered decimated delayed digital output signal, where the lower sample rate is less than the sampling clock frequency.

公开(公告)号：US20160112817A1

公开(公告)日：2016-04-21

申请号：US14886077

申请日：2015-10-18

申请人： KOPIN CORPORATION

发明人： Dashen Fan ,  Xi Chen ,  Hua Bao ,  Eric Frederic Davis

IPC分类号： H04R29/00 ,  H04R1/32 ,  G10L19/008 ,  H04R3/00 ,  H04R1/02

CPC分类号： H04R29/004 ,  G10L19/008 ,  G10L21/0208 ,  G10L25/78 ,  G10L2021/02165 ,  G10L2021/02166 ,  H04R1/028 ,  H04R1/326 ,  H04R3/005 ,  H04R2203/12 ,  H04R2410/01

摘要： Systems and methods are described to extract desired audio from an apparatus to be worn on a user's head. The apparatus includes a head wearable device. A first microphone is coupled to the head wearable device, and is positioned on the head wearable device to receive a voice signal from the user when the head wearable device is on the user's head. A first signal from the first microphone is to be input as a main channel to a noise cancellation unit. A second microphone is coupled to the head wearable device. A first acoustic distance between the first microphone and the user's mouth is less than a second acoustic distance between the second microphone and the user's mouth when the head wearable device is on the user's head. A second signal from the second microphone is to be input as a reference channel to the noise cancellation unit. A first signal-to-noise ratio of the first signal from the first microphone is larger than a second signal-to-noise ratio of the second signal from the second microphone.

摘要翻译： 描述了系统和方法以从要佩戴在用户头部上的装置中提取所需的音频。 该装置包括头戴式装置。 第一麦克风耦合到头部可穿戴设备，并且当头部可穿戴设备在用户的头部上时，它位于头部可穿戴设备上以接收来自用户的语音信号。 将来自第一麦克风的第一信号作为主信道输入到噪声消除单元。 第二麦克风耦合到头戴式装置。 当头戴式装置在用户的头部上时，第一麦克风和用户嘴部之间的第一声距离小于第二麦克风和用户嘴部之间的第二声距。 将来自第二麦克风的第二信号作为参考信道输入到噪声消除单元。 来自第一麦克风的第一信号的第一信噪比大于来自第二麦克风的第二信号的第二信噪比。

公开(公告)号：US20150223272A1

公开(公告)日：2015-08-06

申请号：US14612832

申请日：2015-02-03

申请人： Kopin Corporation

发明人： Christopher Parkinson ,  Dashen Fan ,  Frederick Herrmann ,  John Gassel ,  Murshed Khandaker

IPC分类号： H04W76/02 ,  G10L19/00 ,  G10L19/005 ,  H04L29/06

CPC分类号： H04W76/10 ,  G10L19/0017 ,  G10L19/005 ,  H04L65/602 ,  H04M1/6066 ,  H04M2250/74

摘要： A method of interfacing with a serving device from a wearable device worn by a user, the method includes establishing a lossless and wireless data link between the serving device and the wearable device. The method further includes collecting, by the wearable device, audio data from one or more microphones of the wearable device. The method also includes sending, by the wearable device, the collected audio data to the serving device through the lossless and wireless data link. The method may further include providing, by the serving device, speech recognition services associated with the audio data.

摘要翻译： 一种从用户佩戴的可穿戴设备与服务设备接口的方法，所述方法包括在服务设备和可穿戴设备之间建立无损和无线数据链路。 该方法还包括由可穿戴设备从可穿戴设备的一个或多个麦克风收集音频数据。 该方法还包括通过无损和无线数据链路将所收集的音频数据由可穿戴设备发送到服务设备。 该方法还可以包括由服务设备提供与音频数据相关联的语音识别服务。