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公开(公告)号：US20230356593A1
公开(公告)日：2023-11-09
申请号：US18310642
申请日：2023-05-02
Applicant: NXP B.V.
Inventor： Temujin Gautama , Christophe Marc Macours , Bernard Kuhn
CPC classification number: B60K35/00 , H04R3/00 , H04R2499/13 , B60K2370/157
Abstract: A method of generating an audible alert by a digital audio system configured to operate in a first operating mode and a second operating mode is described. An alert signal is generated or received. One or more segments of the generated or received alert signal is processed. The processed alert signal is then analysed to define the operating mode of the digital audio system. In the first operating mode, the alert output signal includes at least the alert signal. In the second operating mode, the alert output signal includes at least the processed alert signal.
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公开(公告)号：US20230007395A1
公开(公告)日：2023-01-05
申请号：US17808622
申请日：2022-06-24
Applicant: NXP B.V.
Inventor： Temujin Gautama , Christophe Marc Macours , Bram Hedebouw
IPC: H04R3/04
Abstract: An audio processor and method of audio processing for an amplifier system is described. The audio processor may receive an audio signal and adapt the audio signal generating a time varying offset. The time varying offset may be combined with the audio signal resulting in a shifted the audio signal level. The processed audio signal may also be clipped to remove the negative samples values. The processed signal may be used to drive an amplifier designed to only accept positive (or negative) signals such as a class C amplifier.
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公开(公告)号：US20210306188A1
公开(公告)日：2021-09-30
申请号：US16835110
申请日：2020-03-30
Applicant: NXP B.V.
Inventor： Joris Louis L Luyten , Christophe Marc Macours , Temujin Gautama
Abstract: In one example, a communications circuit processes an amplitude modulated signal by using a first circuit having signal paths to process an amplitude modulated signal as represented by an in-phase component and by a quadrature component, and by using a second circuit to discern random noise pulses from the quadrature component of the amplitude modulated signal. In response, the second circuit generates an estimate of overall noise representing the random noise pulses in the amplitude modulated signal. In the above and more specific examples, the random noise pulses may appear as pulses which overlap with, in terms of time and bandwidth of frequency spectrum, information of the amplitude modulated signal, and the first and second circuits may be part of an RF radio receiving the amplitude modulated signal from an antenna.
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公开(公告)号：US10436828B2
公开(公告)日：2019-10-08
申请号：US16118995
申请日：2018-08-31
Applicant: NXP B.V.
Inventor： Temujin Gautama , Remko van Heeswijk
Abstract: A load detector for an audio system comprising a closed-loop amplifier is described. The load detector includes a noise detector configured to be coupled to the output of the closed-loop amplifier. The noise detector detects a noise signal at least partially generated by the amplifier. The generated noise signal comprises frequencies outside the audible frequency range due to the noise shaping of the amplifier. The load detector further includes a parameter calculation module having an input coupled to the output of the noise detector and an output. The parameter calculation module is configured to determine a parameter value relating to an impedance of the amplifier output load from the detected noise signal and to output a load detection signal dependent on the determined parameter value. The load detector may detect the presence of a load such as a tweeter without generating a reference signal.
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公开(公告)号：US20180174569A1
公开(公告)日：2018-06-21
申请号：US15841917
申请日：2017-12-14
Applicant: NXP B.V.
Inventor： Temujin Gautama
IPC: G10K11/178 , H04B1/10
CPC classification number: G10K11/17821 , G10K11/17875 , G10L21/0232 , G10L2021/02161 , H04B1/1027 , H04H20/22
Abstract: A receiver circuit comprising a first-input-terminal configured to receive an analogue-input-signal, which is representative of audio-data; and a second-input-terminal configured to receive a digital-input-signal, which is representative of the same audio-data as the analogue-input-signal. The receiver circuit also includes a noise-estimator configured to determine a noise-signal that is representative of a difference between the analogue-input-signal and the digital-input-signal; and a de-noiser that is configured to determine a de-noised-signal by applying a de-noising algorithm to the analogue-input-signal based on the noise-signal.
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Patent Agency Ranking
公开(公告)号：US20180107447A1
公开(公告)日：2018-04-19
申请号：US15691057
申请日：2017-08-30
Applicant: NXP B.V.
Inventor： Temujin Gautama , Joris Luyten
Abstract: An audio processing circuit, audio unit and integrated circuit and method for blending are described. The audio processing circuit comprises: a time-to-frequency domain circuit configured to convert a primary audio signal and a secondary audio signal in a time-domain form and output frequency spectrum representations thereof; a cross-fade magnitude circuit configured to obtain a cross-faded magnitude spectrum representation from the frequency spectrum representations; a cross-fade phase circuit configured to obtain a separate cross-faded phase spectrum representation from the frequency spectrum representations; and a frequency-to-time domain circuit configured to receive the separate cross-faded magnitude and cross-faded phase spectrum representations and output a time domain signal.
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公开(公告)号：US09826294B2
公开(公告)日：2017-11-21
申请号：US15598527
申请日：2017-05-18
Applicant: NXP B.V.
CPC classification number: H04R1/00 , H04R3/00 , H04R3/002 , H04R3/007 , H04R29/001 , H04R29/003
Abstract: A loudspeaker controller (1) for controlling a loudspeaker (2), configured to determine time-varying impedance information of the loudspeaker (2) based on a loudspeaker voltage and a measure of a loudspeaker current and provide for control of the loudspeaker (2) in accordance with said time-varying impedance information.
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公开(公告)号：US09357322B2
公开(公告)日：2016-05-31
申请号：US14508569
申请日：2014-10-07
Applicant: NXP B.V.
Inventor： Temujin Gautama
CPC classification number: H04R29/001 , G01R19/14 , H04R5/04
Abstract: A method comprising the steps of:determining one or more impedance values of a loudspeaker; anddetermining the polarity of a loudspeaker based on the one or more impedance values.
Abstract translation: 一种方法，包括以下步骤：确定扬声器的一个或多个阻抗值; 以及基于所述一个或多个阻抗值确定扬声器的极性。
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公开(公告)号：US09332347B2
公开(公告)日：2016-05-03
申请号：US14606288
申请日：2015-01-27
Applicant: NXP B.V.
Inventor： Temujin Gautama
CPC classification number: H04R3/007 , H04R3/002 , H04R3/08 , H04R29/003
Abstract: A loudspeaker control system is disclosed. The loudspeaker control system includes a loudspeaker, a sensor for measuring a voltage and current and a processor. The processor is adapted to calculate an input-voltage-to-excursion transfer function over time from an admittance function, blocked electrical impedance and force factor, use the input-voltage-to-excursion transfer function over time to predict an excursion and use the excursion to control audio processing of the loudspeaker.
Abstract translation: 公开了一种扬声器控制系统。 扬声器控制系统包括扬声器，用于测量电压和电流的传感器以及处理器。 处理器适用于从导纳函数，阻塞电阻抗和力因子随时间推算输入电压到偏移传递函数，随时间使用输入电压到偏移传递函数来预测偏移量，并使用 偏移以控制扬声器的音频处理。
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公开(公告)号：US20160111110A1
公开(公告)日：2016-04-21
申请号：US14855094
申请日：2015-09-15
Applicant: NXP B.V.
Inventor： Temujin Gautama
IPC: G10L21/0316 , H03G3/20
CPC classification number: G10L21/0316 , H03G3/20 , H04R3/002 , H04R3/04
Abstract: An audio system is described including an audio processor, an amplifier and a speaker and a distortion estimator. The distortion estimator calculates at least one of an expected response of the amplifier to an audio signal and an expected response of the loudspeaker to an audio signal. The distortion estimator is operable to generate a distortion prediction signal determined by a difference between an expected non-linear response of at least one of the loudspeaker and the amplifier and an expected linear response of at least one of the loudspeaker and the amplifier. A controller coupled to the audio processor and a control input of the audio processor may vary the operating parameters of the audio processor depending on the estimated distortion.
Abstract translation: 描述了包括音频处理器，放大器和扬声器以及失真估计器的音频系统。 失真估计器计算放大器对音频信号的预期响应和扬声器对音频信号的预期响应中的至少一个。 失真估计器可操作以产生由扬声器和放大器中的至少一个的预期非线性响应与至少一个扬声器和放大器的预期线性响应之间的差确定的失真预测信号。 耦合到音频处理器的控制器和音频处理器的控制输入可以根据估计的失真改变音频处理器的操作参数。
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