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1. 发明授权

US09877107B2 Processing audio signals 有权
公开(公告)号：US09877107B2
公开(公告)日：2018-01-23
申请号：US15278004
申请日：2016-09-27
申请人： Marvell World Trade Ltd.
发明人： Christopher Painter , Erfan Soltanmohammadi , Kapil Jain
IPC分类号： H03G5/00 , H04R3/04 , H04R29/00
CPC分类号： H04R3/04 , H04R3/002 , H04R3/007 , H04R29/001 , H04R2420/07 , H04R2430/03
摘要： An audio processing circuit comprises an analyzer circuit that includes a plurality of energy detector units, and an equalizer circuit that includes a plurality of equalization filters. The equalizer circuit is coupled with the analyzer circuit. The analyzer circuit is configured to receive an audio signal, obtain sub-bands of the audio signal using the energy detector units, measure energy of each sub-band, compare the energy of each sub-band to a threshold energy value and, based on the comparison, determine parameters for an equalization filter for processing the sub-band. The equalizer circuit is configured to receive the audio signal concurrently with reception of the audio signal by the analyzer circuit, obtain the sub-bands using the equalization filters, receive the parameters for the equalization filters from the analyzer circuit, equalize each sub-band by applying the parameters corresponding to the sub-band, and generate an output audio signal that includes the equalized sub-bands.

2. 发明申请

US20170111737A1 Processing Audio Signals 有权
公开(公告)号：US20170111737A1
公开(公告)日：2017-04-20
申请号：US15278004
申请日：2016-09-27
申请人： Marvell World Trade Ltd.
发明人： Christopher Painter , Erfan Soltanmohammadi , Kapil Jain
IPC分类号： H04R3/04 , H04R29/00
CPC分类号： H04R3/04 , H04R3/002 , H04R3/007 , H04R29/001 , H04R2420/07 , H04R2430/03
摘要： An audio processing circuit comprises an analyzer circuit that includes a plurality of energy detector units, and an equalizer circuit that includes a plurality of equalization filters. The equalizer circuit is coupled with the analyzer circuit. The analyzer circuit is configured to receive an audio signal, obtain sub-bands of the audio signal using the energy detector units, measure energy of each sub-band, compare the energy of each sub-band to a threshold energy value and, based on the comparison, determine parameters for an equalization filter for processing the sub-band. The equalizer circuit is configured to receive the audio signal concurrently with reception of the audio signal by the analyzer circuit, obtain the sub-bands using the equalization filters, receive the parameters for the equalization filters from the analyzer circuit, equalize each sub-band by applying the parameters corresponding to the sub-band, and generate an output audio signal that includes the equalized sub-bands.

3. 发明申请

US20170084289A1 Residual Noise Suppression 审中-公开
公开(公告)号：US20170084289A1
公开(公告)日：2017-03-23
申请号：US15252091
申请日：2016-08-30
申请人： Marvell World Trade Ltd.
发明人： Sungyub Daniel Yoo , Jin Xie , Kapil Jain
IPC分类号： G10L21/0232 , G10L21/034 , G10L21/0364 , G10L25/84
CPC分类号： G10L25/84 , G10L21/0208 , G10L21/034 , G10L2025/783
摘要： A method includes determining a preprocessed audio signal by removing some noise from an input audio signal. Here, portions of the preprocessed audio signal that include speech are separated by portions of the preprocessed audio signal that include residual noise. Additionally, the method includes determining an amplified signal by suppressing the preprocessed audio signal over the portions that include residual noise, and maintaining the preprocessed audio signal over the portions that include speech.

4. 发明申请

US20160233855A1 Pulse Width Modulation 有权
标题翻译：脉冲宽度调制
公开(公告)号：US20160233855A1
公开(公告)日：2016-08-11
申请号：US15017010
申请日：2016-02-05
申请人： Marvell World Trade Ltd.
发明人： Kapil Jain , Zining Wu
IPC分类号： H03K7/08
CPC分类号： H03K7/08
摘要： A device includes a combining circuitry that receives an incoming signal, and one or more delayed signals from a delay circuitry. The combining circuitry combines the incoming signal and the one or more delayed signals to generate a combined signal. The device includes a comparing circuitry that receives the combined signal from the combining circuitry, and compares a pulse width of the combined signal to a threshold pulse width. When the pulse width of the combined signal is greater than or equal to the threshold pulse width, the comparing circuitry provides the combined signal to an amplifier circuit and provides a null signal to the delay circuitry. The amplifier circuit generates a pulse width modulated (PWM) signal based on the combined signal.
摘要翻译：一种设备包括接收输入信号的组合电路和来自延迟电路的一个或多个延迟信号。组合电路组合输入信号和一个或多个延迟信号以产生组合信号。该装置包括比较电路，其接收来自组合电路的组合信号，并将组合信号的脉冲宽度与阈值脉冲宽度进行比较。当组合信号的脉冲宽度大于或等于阈值脉冲宽度时，比较电路将组合信号提供给放大器电路，并向延迟电路提供零信号。放大器电路基于组合信号产生脉宽调制（PWM）信号。

5. 发明授权

US09100257B2 Systems and methods for composite adaptive filtering 有权
标题翻译：用于复合自适应滤波的系统和方法
公开(公告)号：US09100257B2
公开(公告)日：2015-08-04
申请号：US13749092
申请日：2013-01-24
申请人： Marvell World Trade Ltd.
发明人： Kapil Jain
IPC分类号： H03H7/30 , H04L27/26 , H03H21/00
CPC分类号： H04L27/2649 , H03H21/0012 , H03H2021/0078
摘要： Systems and methods are provided for adaptively filtering a signal. A signal is received, and the received signal is filtered to generate an output signal. A difference signal is generated based on a difference between the output signal and a reference signal, and a correlation of the received signal and the different signal is evaluated. Then, a mode is selected between a first adaptive filtering mode and a second adaptive filtering mode based at least in part on the correlation, and the received signal is filtered using the selected adaptive filtering mode.
摘要翻译：提供了系统和方法来自适应地过滤信号。接收信号，并且对接收到的信号进行滤波以产生输出信号。基于输出信号和参考信号之间的差产生差分信号，并且评估接收信号与不同信号的相关性。然后，至少部分地基于相关性，在第一自适应滤波模式和第二自适应滤波模式之间选择模式，并且使用所选择的自适应滤波模式对接收的信号进行滤波。

6. 发明授权

US09088273B2 Adaptively interpolating and searching to refine sampling in pulse width modulation 有权
标题翻译：适应内插和搜索，以改进脉宽调制中的采样
公开(公告)号：US09088273B2
公开(公告)日：2015-07-21
申请号：US13781924
申请日：2013-03-01
申请人： MARVELL WORLD TRADE LTD
发明人： Sasan Cyrusian , Zining Wu , Kapil Jain
IPC分类号： H03K9/08 , H03K7/08
CPC分类号： H03K7/08
摘要： Systems, methods, and other embodiments associated with estimating a natural sampling point from uniform sample points when generating a PWM signal are described. According to one embodiment, an apparatus includes a cross point logic configured to determine which of the samples along the analog signal are adjacent to a crossing point of a reference signal and the analog signal by identifying samples between which the crossing point occurs. The apparatus includes an interpolation logic configured to adaptively interpolate points along the analog signal that approach the crossing point by using the samples. The interpolation logic is configured to adaptively interpolate the points to refine a region between the points within which the crossing point occurs. The apparatus includes a search logic configured to search within the region to produce an estimated location of the crossing point by using the interpolated points.
摘要翻译：描述了当产生PWM信号时从统一采样点估计自然采样点的系统，方法和其它实施例。根据一个实施例，一种装置包括交叉点逻辑，其被配置为通过识别发生交叉点的样本来确定沿模拟信号的哪些样本与参考信号的交叉点和模拟信号相邻。该装置包括内插逻辑，其被配置为通过使用采样自动地沿着接近交叉点的模拟信号插值点。内插逻辑被配置为自适应地插入点以细化出现交叉点的点之间的区域。该装置包括搜索逻辑，其被配置为在区域内搜索以通过使用内插点来产生交叉点的估计位置。

7. 发明授权

US10651827B2 Apparatus and method for activating circuits 有权
公开(公告)号：US10651827B2
公开(公告)日：2020-05-12
申请号：US15364420
申请日：2016-11-30
申请人： Marvell World Trade Ltd.
发明人： Yafei Hu , Liu Han , Kapil Jain , Jin Xie
IPC分类号： H03K3/012 , G06F1/324 , G06F1/3287 , G06F1/3231 , G10L15/10 , G10L25/21 , G10L25/78 , H04R3/00 , H03K5/15 , H03L3/00 , G10L15/08 , H03K19/00 , G06F1/04
摘要： Aspects of the disclosure include an apparatus that has a first clock generator and a second clock generator. The first clock generator is configured to drive a first circuit, causing the first circuit to (i) receive a signal corresponding to an audio input, and (ii) determine whether an energy level of the signal exceeds a predetermined threshold. The second clock generator is activated when the first circuit determines that the energy level of the signal exceeds the predetermined threshold. The second clock generator is configured to drive a second circuit, causing the second circuit to determine whether the signal matches a predetermined pattern. A third circuit is activated when the second circuit determines that the signal matches the predetermined pattern.

8. 发明授权

US09940946B2 Sharp noise suppression 有权
公开(公告)号：US09940946B2
公开(公告)日：2018-04-10
申请号：US15252068
申请日：2016-08-30
申请人： Marvell World Trade Ltd.
发明人： Jin Xie , Sungyub Daniel Yoo , Kapil Jain
IPC分类号： G10L21/0208 , G10L25/78 , G10L21/034 , G10L21/0232
CPC分类号： G10L21/034 , G10L21/0208 , G10L21/0232 , G10L25/78
摘要： A method includes determining a first filtered signal based on an audio signal; determining a second filtered signal based on the audio signal; determining, based on the first filtered signal and the second filtered signal, a portion of the audio signal corresponding to a sharp noise; determining, based on the first filtered signal and the second filtered signal, a gain signal that, for the portion of the audio signal corresponding to the sharp noise, has a value that is smaller than a value of the gain signal for the remaining portion of the audio signal; and suppressing, based on the gain signal, the sharp noise from an amplifier input signal determined based on the audio signal.

9. 发明授权

US09940945B2 Method and apparatus for eliminating music noise via a nonlinear attenuation/gain function 有权
公开(公告)号：US09940945B2
公开(公告)日：2018-04-10
申请号：US14829052
申请日：2015-08-18
申请人： Marvell World Trade Ltd.
发明人： Jin Xie , Kapil Jain
IPC分类号： G10L21/02 , G10L19/02 , G10L21/0264 , G10L25/21 , G10L21/0316 , G10L21/0232 , G10L21/0208 , G10L21/0216
CPC分类号： G10L21/0264 , G10L19/0204 , G10L21/0232 , G10L21/0316 , G10L25/21 , G10L2021/02085 , G10L2021/02163
摘要： A system including first and second gain modules, an operator module, and a priori and posteriori modules. The first gain module applies a non-linear function to generate a gain signal based on an amplitude of a first speech signal and an estimated a priori variance of noise included in the first speech signal. The operator module generates an operator based on the gain signal and the estimated a priori variance of noise. The a priori module determines an a priori signal-to-noise ratio based on the operator. The posteriori module determines a posteriori signal-to-noise ratio based on the amplitude of the first speech signal and (ii) the estimated a priori variance of noise. The second gain module: determines a gain value based on the a priori signal-to-noise ratio and the a posteriori signal-to-noise ratio; and generates, based on the amplitude of the first speech signal and the gain value, a second speech signal that corresponds to an estimate of an amplitude of the first speech signal, where the second speech signal is substantially void of music noise.

10. 发明申请

US20150103877A1 ELECTRO-MAGNETIC INTERFERENCE REDUCTION FOR SWITCHED SIGNAL SYSTEMS 审中-公开
标题翻译：用于开关信号系统的电磁干扰减少
公开(公告)号：US20150103877A1
公开(公告)日：2015-04-16
申请号：US14575574
申请日：2014-12-18
申请人： Marvell World Trade Ltd.
发明人： Kapil Jain
IPC分类号： H04L25/49
CPC分类号： H04L25/4902 , H04B15/06 , H04B2215/064 , H04B2215/067
摘要： In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined. The value is used to modulate a switching frequency of the pulse width modulation signal to generate a modulated pulse width modulation signal. The applied value reduces electro-magnetic interference from tones in the modulated pulse width modulation signal.
摘要翻译：在一个实施例中，一种方法接收脉宽调制信号。确定作为脉宽调制信号的函数的值。该值用于调制脉宽调制信号的开关频率以产生调制脉宽调制信号。所应用的值可以减小调制脉宽调制信号中的音调的电磁干扰。

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