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公开(公告)号：US09172479B2
公开(公告)日：2015-10-27
申请号：US13736363
申请日：2013-01-08
Applicant: NXP B.V.
Inventor： Temujin Gautama
CPC classification number: H04H20/89 , H04B1/1676 , H04H40/72
Abstract: A processing unit for processing a multi-channel audio signal has a delay element (40) for delaying an FM sum signal (sum) and a converter arrangement (T) for converting an FM difference signal (diff) and a noise signal (diffnoise) to the frequency domain. Frequency-based noise suppression is used to derive a de-noised frequency-domain difference signal using a gain function which is limited to a maximal and a minimal value. This is then converted to the time domain, and the first and second audio signals are calculated from a delayed sum signal (sum2) and the de-noised time domain difference signal (diff2).
Abstract translation: 用于处理多声道音频信号的处理单元具有用于延迟FM和信号（sum）的延迟元件（40）和用于转换FM差分信号（diff）和噪声信号（diffnoise）的转换器装置（T） 到频域。 使用基于频率的噪声抑制来使用限于最大和最小值的增益函数来导出去噪的频域差分信号。 然后将其转换为时域，并且从延迟和信号（sum2）和去噪时间域差信号（diff2）计算第一和第二音频信号。
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公开(公告)号：US09171538B2
公开(公告)日：2015-10-27
申请号：US14023704
申请日：2013-09-11
Applicant: NXP B.V.
Inventor： Temujin Gautama
IPC: G10K11/178 , H04B1/10 , G10L21/0208 , H03G3/34 , G10L21/0224 , G10L21/0232
CPC classification number: G10K11/178 , G10L21/0208 , G10L21/0224 , G10L21/0232 , H03G3/345 , H04B1/1027
Abstract: FM and AM receivers in car environments require a noise blanker circuit or method to reduce the audible disturbances generated by impulse noise, such as ignition noise, in the audio signal. The invention proposes a combination of time-domain and frequency-domain processing to reduce the audible distortion. The time-domain processing interpolates the signal during the impulse noise bursts, and the frequency-domain processing disperses the remaining signal distortion over time, or relocates it to positions in time where it is attenuated by a windowing technique.
Abstract translation: 汽车环境中的FM和AM接收机需要一个噪声抑制电路或方法来减少音频信号中脉冲噪声（如点火噪声）产生的声音干扰。 本发明提出了时域和频域处理的组合，以减少可听见的失真。 时域处理在脉冲噪声突发期间内插信号，并且频域处理随着时间的推移而分散剩余的信号失真，或者将其重定位到通过加窗技术衰减的时间位置。
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公开(公告)号：US09154881B2
公开(公告)日：2015-10-06
申请号：US13973739
申请日：2013-08-22
Applicant: NXP B.V.
Inventor： Temujin Gautama , Alan Ocinneide
IPC: H04R5/04 , G10L19/005
CPC classification number: H04R5/04 , G10L19/005
Abstract: Systems and method for audio processing are disclosed. Left and right channels of an audio data stream are combined to derive sum and difference signals. A time domain to frequency domain converter is provided for converting the sum and difference signals to the frequency domain. a first processing unit is provided for deriving a frequency domain noise signal based at least partly on the frequency domain difference signal. A second processing unit is provided for processing the frequency domain sum signal using the noise signal thereby to reduce noise artifacts in the sum signal. A frequency domain to time domain converter is provided for converting at least the processed frequency domain sum signal to the time domain.
Abstract translation: 公开了用于音频处理的系统和方法。 组合音频数据流的左和右声道以导出和和差信号。 提供时域到频域转换器，用于将和信号和差信号转换成频域。 第一处理单元被提供用于至少部分地基于频域差信号导出频域噪声信号。 提供第二处理单元，用于使用噪声信号来处理频域和信号，从而减少和信号中的噪声伪像。 提供了一个频域至时域转换器，用于至少将经处理的频域和信号转换为时域。
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公开(公告)号：US11882414B2
公开(公告)日：2024-01-23
申请号：US17660380
申请日：2022-04-22
Applicant: NXP B.V.
Inventor： Temujin Gautama
CPC classification number: H04R29/001 , H04R3/04
Abstract: There is disclosed an audio playback system including a loudspeaker, a microphone and a means for implementing a method of detecting a fault which includes the generation and analysis of a specific ultrasound reference signal. The presence of the ultrasound reference signal can be detected on the microphone signal, and the signal-to-noise ratio can be estimated during the reference signal playback so that the volume of the reference signal can be adapted if necessary. The reference signal is a multi-sinusoidal signal which, when averaged over time increases the expected signal-to-noise ratio, and hence, the power of the detector.
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公开(公告)号：US20230088440A1
公开(公告)日：2023-03-23
申请号：US17823263
申请日：2022-08-30
Applicant: NXP B.V.
Inventor： Christophe Marc Macours , Temujin Gautama , Alexander Barry Young
IPC: H04B1/12
Abstract: A signal processor and method of signal processing for a radio receiver is described. An input signal is received together with a spectral repetition interval value of an interferer signal. An interference reference signal is generated from the received spectral repetition interval value and the received signal. The received signal is adapted using the generated interference reference signal.
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Patent Agency Ranking
公开(公告)号：US11418879B2
公开(公告)日：2022-08-16
申请号：US15931398
申请日：2020-05-13
Applicant: NXP B.V.
Inventor： Joris Louis L Luyten , Temujin Gautama
IPC: H04R3/04 , G06F3/16 , G11B27/038 , H03M1/34
Abstract: A method and apparatus are described for aligning cross-faded audio signals using beats. In an embodiment, a controller includes a cross-fade module having at least first and second audio inputs and an audio output port to provide an audio output signal to an external audio reproduction system. A control signal determines whether to provide the first or the second audio signal to the audio output, and the cross-fade module cross-fades the audio output signal from one audio signal to the other audio signal. A beat alignment module determines a delay between a first beat of the first audio signal and a second beat of the second audio signal, and a delay module delays either the first or the second audio signal to compensate for the delay into the cross-fade module.
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公开(公告)号：US11277287B2
公开(公告)日：2022-03-15
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：US10567097B2
公开(公告)日：2020-02-18
申请号：US15841778
申请日：2017-12-14
Applicant: NXP B.V.
Inventor： Temujin Gautama , Joris Luyten
Abstract: An audio processing circuit is described. The audio processing circuit includes at least one input configured to receive a primary audio signal and a feature generation signal. A feature model estimation circuit is configured to model and output a feature model signal of the primary audio signal. A feature generation circuit is coupled to the feature model estimation circuit and is to receive the feature model signal and the feature generation signal and, in response to the feature model signal, modify the feature generation signal; and output a modified representation of the feature generation signal that is more similar to the primary audio signal.
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公开(公告)号：US20190143904A1
公开(公告)日：2019-05-16
申请号：US16119020
申请日：2018-08-31
Applicant: NXP B.V.
Inventor： Bram Hedebouw , Temujin Gautama
Abstract: A vehicle audio presentation controller configured to receive first audio at a first audio input and second audio at a second audio input, the controller configured to perform the following: based on said first audio and said second audio for presentation in a vehicle and context information associated with said first audio; provide for audible presentation of said first audio and said second audio at the same time with an audio-modifying-effect-profile of a plurality of different predetermined audio-modifying-effect-profiles selected at least based on the context information, the audio-modifying-effect-profile comprising a plurality of audio-modifying effects at least including a first and a second audio-modifying effect, the first audio-modifying effect applied to the first audio and the second audio-modifying effect applied to the second audio.
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公开(公告)号：US10255034B2
公开(公告)日：2019-04-09
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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