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公开(公告)号：US08374362B2
公开(公告)日：2013-02-12
申请号：US12023970
申请日：2008-01-31
IPC分类号： 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。
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12.发明申请公开(公告)号：US20090238369A1
公开(公告)日：2009-09-24
申请号：US12323186
申请日：2008-11-25
申请人： Dinesh Ramakrishnan , Song Wang
发明人： Dinesh Ramakrishnan , Song Wang
IPC分类号： H04R29/00
CPC分类号： H04R3/005 , H04R2410/07 , H04R2499/11
摘要： A method for detecting wind noise is described. At least two audio signals are received. The at least two audio signals are filtered to reduce higher frequencies and to reduce lower frequencies to provide at least two filtered audio signals. The cross correlation of the at least two filtered audio signals is computed for multiple delays. A maximum cross correlation is determined from the cross correlations computed for the multiple delays. Wind noise is detected by comparing the maximum cross correlation with a threshold.
摘要翻译： 描述了一种用于检测风噪声的方法。 至少接收两个音频信号。 对至少两个音频信号进行滤波以降低较高频率并降低较低的频率以提供至少两个滤波的音频信号。 对于多个延迟来计算至少两个滤波后的音频信号的互相关。 从针对多个延迟计算的互相关确定最大互相关。 通过比较最大互相关与阈值来检测风噪声。
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13.发明授权公开(公告)号：US08184816B2
公开(公告)日：2012-05-22
申请号：US12323186
申请日：2008-11-25
申请人： Dinesh Ramakrishnan , Song Wang
发明人： Dinesh Ramakrishnan , Song Wang
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , H04R2410/07 , H04R2499/11
摘要： A method for detecting wind noise is described. At least two audio signals are received. The at least two audio signals are filtered to reduce higher frequencies and to reduce lower frequencies to provide at least two filtered audio signals. The cross correlation of the at least two filtered audio signals is computed for multiple delays. A maximum cross correlation is determined from the cross correlations computed for the multiple delays. Wind noise is detected by comparing the maximum cross correlation with a threshold.
摘要翻译： 描述了一种用于检测风噪声的方法。 至少接收两个音频信号。 对至少两个音频信号进行滤波以降低较高频率并降低较低的频率以提供至少两个滤波的音频信号。 对于多个延迟来计算至少两个滤波后的音频信号的互相关。 从针对多个延迟计算的互相关确定最大互相关。 通过比较最大互相关与阈值来检测风噪声。
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14.发明申请METHODS AND APPARATUS FOR SUPPRESSING AMBIENT NOISE USING MULTIPLE AUDIO SIGNALS 有权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：US20090240495A1
公开(公告)日：2009-09-24
申请号：US12323200
申请日：2008-11-25
申请人： Dinesh Ramakrishnan , Song Wang
发明人： Dinesh Ramakrishnan , Song Wang
IPC分类号： G10L21/02
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。
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公开(公告)号：US20090238377A1
公开(公告)日：2009-09-24
申请号：US12405057
申请日：2009-03-16
申请人： Dinesh Ramakrishnan , Song Wang
发明人： Dinesh Ramakrishnan , Song Wang
CPC分类号： H04R3/005 , G10L21/028 , G10L21/0308 , G10L2021/02165 , G10L2021/02166 , H04R29/006 , H04R2420/07 , H04R2430/03 , H04R2430/20 , H04R2499/11
摘要： Signal processing solutions take advantage of microphones located on different devices and improve the quality of transmitted voice signals in a communication system. With usage of various devices such as Bluetooth headsets, wired headsets and the like in conjunction with mobile handsets, multiple microphones located on different devices are exploited for improving performance and/or voice quality in a communication system. Audio signals are recorded by microphones on different devices and processed to produce various benefits, such as improved voice quality, background noise reduction, voice activity detection and the like.
摘要翻译： 信号处理解决方案利用位于不同设备上的麦克风，并提高通信系统中传输的语音信号的质量。 随着诸如蓝牙耳机，有线耳机等各种设备的使用，与移动手机结合使用，位于不同设备上的多个麦克风被用来改善通信系统中的性能和/或语音质量。 音频信号由不同设备上的麦克风记录，并被处理以产生各种益处，例如改善的语音质量，背景噪声降低，语音活动检测等。
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16.发明授权公开(公告)号：US09552840B2
公开(公告)日：2017-01-24
申请号：US13280303
申请日：2011-10-24
申请人： Lae-Hoon Kim , Erik Visser , Pei Xiang , Ian Ernan Liu , Dinesh Ramakrishnan
发明人： Lae-Hoon Kim , Erik Visser , Pei Xiang , Ian Ernan Liu , Dinesh Ramakrishnan
CPC分类号： G11B20/00 , H04R3/005 , H04R2201/401 , H04S2400/15
摘要： A method for audio signal processing is described. The method includes decomposing a recorded auditory scene into a first category of localizable sources and a second category of ambient sound. The method also includes recording an indication of the directions of each of the localizable sources. The method may be performed with a device having a microphone array.
摘要翻译： 描述用于音频信号处理的方法。 该方法包括将记录的听觉场景分解为第一类可本地化的源和第二类环境声音。 该方法还包括记录每个可本地化的源的方向的指示。 该方法可以用具有麦克风阵列的设备来执行。
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公开(公告)号：US08380497B2
公开(公告)日：2013-02-19
申请号：US12579322
申请日：2009-10-14
IPC分类号： G10L21/02
CPC分类号： G10L25/78 , G10L21/0216 , G10L25/48
摘要： A system and method are disclosed for noise level/spectrum estimation and speech activity detection. Some embodiments include a probabilistic model to estimate noise level and subsequently detect the presence of speech. These embodiments outperform standard voice activity detectors (VADs), producing improved detection in a variety of noisy environments.
摘要翻译： 公开了用于噪声水平/频谱估计和语音活动检测的系统和方法。 一些实施例包括估计噪声水平并随后检测语音存在的概率模型。 这些实施例优于标准语音活动检测器（VAD），在各种噪声环境中产生改进的检测。
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公开(公告)号：US09119159B2
公开(公告)日：2015-08-25
申请号：US13206372
申请日：2011-08-09
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。
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19.发明授权Systems, methods, apparatus, and computer-readable media for orientation-sensitive recording control 有权用于方向敏感记录控制的系统，方法，装置和计算机可读介质公开(公告)号：US09031256B2
公开(公告)日：2015-05-12
申请号：US13280211
申请日：2011-10-24
申请人： Erik Visser , Ian Ernan Liu , Dinesh Ramakrishnan , Lae-Hoon Kim , Pei Xiang
发明人： Erik Visser , Ian Ernan Liu , Dinesh Ramakrishnan , Lae-Hoon Kim , Pei Xiang
CPC分类号： H04R3/005 , H04R2201/401 , H04R2201/403 , H04R2201/405 , H04R2430/21 , H04R2430/23 , H04S7/303 , H04S2400/15
摘要： A method of orientation-sensitive recording control includes indicating, within a portable device and at a first time, that the portable device has a first orientation relative to a gravitational axis and, based on the indication, selecting a first pair among at least three microphone channels of the portable device. This method also includes indicating, within the portable device and at a second time that is different than the first time, that the portable device has a second orientation relative to the gravitational axis that is different than the first orientation and, based on the indication, selecting a second pair among the at least three microphone channels that is different than the first pair. In this method, each the at least three microphone channels is based on a signal produced by a corresponding one of at least three microphones of the portable device.
摘要翻译： 方向敏感记录控制的方法包括在便携式设备内并且在第一时间指示便携式设备相对于重力轴具有第一取向，并且基于该指示，在至少三个麦克风中选择第一对 便携式设备的通道。 该方法还包括在便携式设备内并且在与第一次不同的第二时间指示便携式设备相对于不同于第一方位的重力轴具有第二定向，并且基于该指示， 在所述至少三个麦克风通道中选择与所述第一对不同的第二对。 在该方法中，每个至少三个麦克风通道基于由便携式设备的至少三个麦克风中的对应的一个产生的信号。
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公开(公告)号：US20120177226A1
公开(公告)日：2012-07-12
申请号：US13206372
申请日：2011-08-09
IPC分类号： H03G3/00
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。
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