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1. 发明申请

WO2012138794A1 INTEGRATED ECHO CANCELLATION AND NOISE SUPPRESSION 审中-公开
标题翻译：综合ECHO消除和噪声抑制
公开(公告)号：WO2012138794A1
公开(公告)日：2012-10-11
申请号：PCT/US2012/032217
申请日：2012-04-04
申请人： QUALCOMM INCORPORATED , MOHAMMAD, Asif I. , CHAN, Kwokleung , LIU, Ian Ernan , VISSER, Erik , RAMAKRISHNAN, Dinesh
发明人： MOHAMMAD, Asif I. , CHAN, Kwokleung , LIU, Ian Ernan , VISSER, Erik , RAMAKRISHNAN, Dinesh
IPC分类号： H04M9/08 , H04B3/23 , H04R3/02 , G10L21/02
CPC分类号： H04B3/234 , G10L21/0208 , G10L2021/02082 , G10L2021/02166 , H04M9/082
摘要： A method for echo cancellation and noise suppression is disclosed. Linear echo cancellation (LEC) is performed for a primary microphone channel on an entire frequency band or in a range of frequencies where echo is audible. LEC is performed on one or more secondary microphone channels only on a lower frequency range over which spatial processing is effective. The microphone channels are spatially processed over the lower frequency range after LEC. Non-linear noise suppression post-processing is performed on the entire frequency band. Echo post-processing is performed on the entire frequency band.
摘要翻译：公开了一种用于回波消除和噪声抑制的方法。线性回波消除（LEC）是在整个频带上的主要麦克风通道或在可听见回声的频率范围内执行的。只有在空间处理有效的较低频率范围上的一个或多个辅助麦克风通道上执行LEC。麦克风通道在LEC之后的较低频率范围内进行空间处理。在整个频带上执行非线性噪声抑制后处理。在整个频带上执行回波后处理。

2. 发明申请

WO2020176338A1 FEEDBACK CONTROL FOR DISPLAY AS SOUND EMITTER 审中-公开
公开(公告)号：WO2020176338A1
公开(公告)日：2020-09-03
申请号：PCT/US2020/019188
申请日：2020-02-21
申请人： QUALCOMM INCORPORATED
发明人： BERNAL CASTILLO, Ricardo De Jesus , HEIMBIGNER, Wade , RAMAKRISHNAN, Dinesh , SCHEVCIW, Andre Gustavo , RYU, Sang-Uk
IPC分类号： H04R3/02 , H04R29/00 , G06F1/16 , H04M9/08 , H04R7/04 , G10L25/48 , G10L21/0208
摘要： Aspects of the disclosure relate to using a display as a sound emitter and may relate to an electronic device including a display. In particular a vibration sensor such as an accelerometer is physically coupled to the display and senses display vibration to provide a high accuracy feedback loop with respect to representing actual audio output from the display. The electronic device includes an actuator physically coupled to the display and configured to cause vibration of the display in response to an audio signal. The electronic device further includes a vibration sensor physically coupled to the display and configured to output a vibration sensor signal proportional to the vibration of the display due to the actuator.

3. 发明申请

WO2011041738A2 SUPPRESSING NOISE IN AN AUDIO SIGNAL 审中-公开
标题翻译：抑制音频信号中的噪声
公开(公告)号：WO2011041738A2
公开(公告)日：2011-04-07
申请号：PCT/US2010/051209
申请日：2010-10-01
申请人： QUALCOMM INCORPORATED , RAMAKRISHNAN, Dinesh , SHAHRI, Homayoun , WANG, Song
发明人： RAMAKRISHNAN, Dinesh , SHAHRI, Homayoun , WANG, Song
IPC分类号： G10L21/02 , G11B20/24
CPC分类号： G10L21/0208 , G10L21/0232
摘要： An electronic device for suppressing noise in an audio signal is described. The electronic device includes a processor and instructions stored in memory. The electronic device receives an input audio signal and computes an overall noise estimate based on a stationary noise estimate, a non-stationary noise estimate and an excess noise estimate. The electronic device also computes an adaptive factor based on an input Signal-to-Noise Ratio (SNR) and one or more SNR limits. A set of gains is also computed using a spectral expansion gain function. The spectral expansion gain function is based on the overall noise estimate and the adaptive factor. The electronic device also applies the set of gains to the input audio signal to produce a noise-suppressed audio signal and provides the noise-suppressed audio signal.
摘要翻译：描述用于抑制音频信号中的噪声的电子设备。电子设备包括处理器和存储在存储器中的指令。电子设备接收输入音频信号并且基于稳态噪声估计，非稳态噪声估计和过量噪声估计来计算总体噪声估计。电子设备还基于输入信噪比（SNR）和一个或多个SNR限制来计算自适应因子。还使用频谱扩展增益函数来计算一组增益。频谱扩展增益函数基于整体噪声估计和自适应因子。电子设备还将该组增益应用于输入音频信号以产生噪声抑制音频信号并提供噪声抑制音频信号。

4. 发明申请

WO2010068455A1 METHODS AND APPARATUS FOR SUPPRESSING AMBIENT NOISE USING MULTIPLE AUDIO SIGNALS 审中-公开
标题翻译：使用多种音频信号抑制环境噪声的方法和装置
公开(公告)号：WO2010068455A1
公开(公告)日：2010-06-17
申请号：PCT/US2009/065761
申请日：2009-11-24
申请人： QUALCOMM INCORPORATED , RAMAKRISHNAN, Dinesh , WANG, Song
发明人： RAMAKRISHNAN, Dinesh , WANG, Song
IPC分类号： G01L21/02 , H04R3/00
CPC分类号： H04R3/005 , G10L21/0272 , G10L2021/02166 , H04R2410/07 , H04R2499/11
摘要： A method for suppressing ambient noise using multiple audio signals may include providing at least two audio signals captured by at least two electro-acoustic transducers. The at least two audio signals may include desired audio and ambient noise. The method may also include performing beamforming on the at least two audio signals in order to obtain a desired audio reference signal that is separate from a noise reference signal.
摘要翻译：使用多个音频信号来抑制环境噪声的方法可以包括提供由至少两个电声换能器捕获的至少两个音频信号。至少两个音频信号可以包括期望的音频和环境噪声。该方法还可以包括对至少两个音频信号执行波束形成，以便获得与噪声参考信号分离的所需音频参考信号。

5. 发明申请

WO2020123835A1 ACOUSTIC ECHO CANCELLATION DURING PLAYBACK OF ENCODED AUDIO 审中-公开
公开(公告)号：WO2020123835A1
公开(公告)日：2020-06-18
申请号：PCT/US2019/066025
申请日：2019-12-12
申请人： QUALCOMM INCORPORATED
发明人： KOSTIC, Andrew , CHOY, Eddie , RAMAKRISHNAN, Dinesh
IPC分类号： G10L21/0208 , H04B3/23 , G10L2021/02082 , G10L2021/02166 , G10L21/028 , G10L21/0364 , H04M9/082
摘要： Methods, systems, computer-readable media, and apparatuses for acoustic echo cancellation during playback of encoded audio are presented. In some embodiments, a decoder is arranged to decode an encoded media signal to produce an echo reference signal, and an echo canceller is arranged to perform an acoustic echo cancellation operation, based on the echo reference signal, on an input voice signal to produce an echo-cancelled voice signal. The echo canceller may be configured to reduce, relative to an energy of a voice component of the input voice signal, an energy of a signal component of the input voice signal that is based on audio content from the encoded media signal.

6. 发明申请

WO2015057317A1 LIMITING ACTIVE NOISE CANCELLATION OUTPUT 审中-公开
标题翻译：限制主动噪声消除输出
公开(公告)号：WO2015057317A1
公开(公告)日：2015-04-23
申请号：PCT/US2014/054220
申请日：2014-09-05
申请人： QUALCOMM INCORPORATED
发明人： PARK, Hyun Jin , CHALLA, Deepak Kumar , WANG, Song , RAMAKRISHNAN, Dinesh
IPC分类号： G10K11/178
CPC分类号： H04R3/002 , G10K11/178 , G10K2210/108 , G10K2210/3039 , G10K2210/3056 , H04R2410/05
摘要： In general, techniques are described for limiting active noise cancellation output. As one example, an apparatus comprising one or more processors may perform the techniques. The one or more processors may be configured to, when an estimated noise level increases, dynamically lowering application of active noise cancellation to at least a portion of an audio signal to obtain at least a portion of an active noise cancelled version of the audio signal.
摘要翻译：通常，描述了用于限制有源噪声消除输出的技术。作为一个示例，包括一个或多个处理器的装置可以执行这些技术。一个或多个处理器可以被配置为当估计的噪声电平增加时，动态地降低对音频信号的至少一部分的有源噪声消除的应用，以获得音频信号的主动噪声消除版本的至少一部分。

7. 发明申请

WO2012096898A1 BATTERY POWER MONITORING AND AUDIO SIGNAL ATTENUATION 审中-公开
标题翻译：电池电量监测和音频信号衰减
公开(公告)号：WO2012096898A1
公开(公告)日：2012-07-19
申请号：PCT/US2012/020673
申请日：2012-01-09
申请人： QUALCOMM INCORPORATED , SILVERSTEIN, Roy B. , RAMAKRISHNAN, Dinesh
发明人： SILVERSTEIN, Roy B. , RAMAKRISHNAN, Dinesh
IPC分类号： H04W52/02 , G06F1/32
CPC分类号： H04W52/0267 , G06F1/3212 , G06F1/325 , H03G3/001 , H03G3/007 , Y02D10/174 , Y02D70/00
摘要： To reduce the risk of brown outs and resets in a mobile station using a far-field speaker, a voltage level of a battery and a level of an input audio signal are monitored. When the level of the audio signal increases past a threshold level, and the voltage level of the battery falls below a threshold voltage, an attenuation is determined and applied to the audio signal. The applied attenuation reduces the volume of the audio signal, which reduces the risk of a brown out or a reset due to insufficient voltage in the mobile station.
摘要翻译：为了降低使用远场扬声器的移动台中的褐色和复位的风险，监视电池的电压电平和输入音频信号的电平。当音频信号的电平增加超过阈值电平，并且电池的电压降低到阈值电压以下时，确定衰减并将其应用于音频信号。所应用的衰减减小了音频信号的音量，从而降低了由于移动台中电压不足导致的掉电或复位的风险。

8. 发明申请

WO2009097407A1 SIGNALING MICROPHONE COVERING TO THE USER 审中-公开
标题翻译：信号麦克风覆盖用户
公开(公告)号：WO2009097407A1
公开(公告)日：2009-08-06
申请号：PCT/US2009/032407
申请日：2009-01-29
申请人： QUALCOMM INCORPORATED , RAMAKRISHNAN, Dinesh , WANG, Song , CHOY, Eddie L. T. , SATYANARAYANAN, Ravi
发明人： RAMAKRISHNAN, Dinesh , WANG, Song , CHOY, Eddie L. T. , SATYANARAYANAN, Ravi
IPC分类号： H04R29/00 , H04R3/00
CPC分类号： H04R3/005 , H04R29/004 , H04R29/006 , H04R2499/11
摘要： A mechanism is provided that monitors secondary microphone signals, in a multi-microphone mobile device, to warn the user if one or more secondary microphones are covered while the mobile device is in use. In one example, smoothly averaged power estimates of the secondary microphones may be computed and compared against the noise floor estimate of a primary microphone. Microphone covering detection may be made by comparing the secondary microphone smooth power estimates to the noise floor estimate for the primary microphone. In another example, the noise floor estimates for the primary and secondary microphone signals may be compared to the difference in the sensitivity of the first and second microphones to determine if the secondary microphone is covered. Once detection is made, a warning signal may be generated and issued to the user.
摘要翻译：提供了一种在多麦克风移动设备中监视次级麦克风信号的机制，以在移动设备正在使用时覆盖一个或多个辅助麦克风来警告用户。在一个示例中，可以计算二次麦克风的平滑平均功率估计，并将其与主麦克风的噪声基底估计进行比较。麦克风覆盖检测可以通过将次级麦克风平滑功率估计与主麦克风的噪声基底估计值进行比较来进行。在另一示例中，可以将主麦克风信号和次麦克风信号的噪声基底估计值与第一麦克风和第二麦克风的灵敏度差进行比较，以确定次麦克风是否被覆盖。一旦检测到，可能会产生一个警告信号并发给用户。

9. 发明授权

EP2633697B1 THREE-DIMENSIONAL SOUND CAPTURING AND REPRODUCING WITH MULTI-MICROPHONES 有权
标题翻译：三维录音及具有多麦克风PLAYING
公开(公告)号：EP2633697B1
公开(公告)日：2016-07-20
申请号：EP11779927.0
申请日：2011-10-25
申请人： Qualcomm Incorporated
发明人： KIM, Lae-Hoon , VISSER, Erik , XIANG, Pei , LIU, Ian Ernan , RAMAKRISHNAN, Dinesh
IPC分类号： H04R5/00 , G11B20/00
CPC分类号： G11B20/00 , H04R3/005 , H04R2201/401 , H04S2400/15

10. 发明公开

EP2664196A1 BATTERY POWER MONITORING AND AUDIO SIGNAL ATTENUATION 有权
标题翻译： BATTERIELEISTUNGSÜBERWACHUNGUNDAUDIOSIGNALDÄMPFUNG
公开(公告)号：EP2664196A1
公开(公告)日：2013-11-20
申请号：EP12701790.3
申请日：2012-01-09
申请人： Qualcomm Incorporated
发明人： SILVERSTEIN, Roy B. , RAMAKRISHNAN, Dinesh
IPC分类号： H04W52/02 , G06F1/32
CPC分类号： H04W52/0267 , G06F1/3212 , G06F1/325 , H03G3/001 , H03G3/007 , H04M1/6016 , Y02D10/174 , Y02D70/00
摘要： To reduce the risk of brown outs and resets in a mobile station using a far-field speaker, a voltage level of a battery and a level of an input audio signal are monitored. When the level of the audio signal increases past a threshold level, and the voltage level of the battery falls below a threshold voltage, an attenuation is determined and applied to the audio signal. The applied attenuation reduces the volume of the audio signal, which reduces the risk of a brown out or a reset due to insufficient voltage in the mobile station.
摘要翻译：为了降低使用远场扬声器的移动台中的褐色和复位的风险，监视电池的电压电平和输入音频信号的电平。当音频信号的电平增加超过阈值电平并且电池的电压降低到阈值电压以下时，确定衰减并将其应用于音频信号。所应用的衰减减少了音频信号的音量，从而降低了由于移动台电压不足导致的掉电或复位的风险。

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