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公开(公告)号：US11304003B2
公开(公告)日：2022-04-12
申请号：US16067924
申请日：2016-12-14
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph , Matthias Kronlachner
Abstract: At least two closely spaced identical or similar loudspeaker assemblies in a horizontal linear array, each loudspeaker assembly comprising at least two identical or similar loudspeakers pointing in different directions so that the loudspeaker assemblies have adjustable, controllable or steerable directivity characteristics. For example, a control module may drive, adjust, control, or steer the loudspeaker assemblies so that at least one acoustic wave field is generated at least at one listening position.
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公开(公告)号：US10979100B2
公开(公告)日：2021-04-13
申请号：US16662904
申请日：2019-10-24
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
IPC: H04B3/23 , G10L19/008 , H04S3/02
Abstract: Multi-channel audio signal processing includes receiving a left stereo audio signal from a first channel and a right stereo audio signal from a second channel; up-mixing the left and the right stereo audio signals to generate an up-mixed audio signal for a third channel; de-correlating the up-mixed audio signal from the left and the right stereo audio signals to generate a de-correlated up-mixed audio signal; providing the left and right stereo signals and the de-correlated up-mixed audio signal to first, second, and third loudspeakers respectively to generate first, second, and third sound signals, respectively; picking up the first, second and third sound signals with a microphone to generate a microphone output signal; and adaptively filtering the microphone output signal with an acoustic echo canceller based on the left, the right, and the de-correlated up-mixed audio signal to generate an echo compensated microphone signal.
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公开(公告)号：US10930260B2
公开(公告)日：2021-02-23
申请号：US15768722
申请日：2016-10-10
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
IPC: G10K11/178
Abstract: Exemplary engine order and road noise control systems and methods include directly picking up road noise from a structural element of a vehicle to generate a first sense signal representative of the road noise, detecting harmonics of an engine of the vehicle to generate a second sense signal representative of the engine harmonics, and combining the first sense signal and the second sense signal to provide a combination signal representing the combination of the first sense signal and the second sense signal. The systems and methods further include broadband active noise control filtering to generate a filtered combination signal, and converting the filtered combination signal from the active noise control filtering into anti-noise and radiating the anti-noise to a listening position in an interior of the vehicle. The filtered combination signal is configured so that the anti-noise reduces the road noise and engine sound at the listening position.
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公开(公告)号：US10827263B2
公开(公告)日：2020-11-03
申请号：US16462348
申请日：2017-11-17
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
Abstract: A system and method for adaptive beamforming, which is configured to process at least two input signals and to provide an output signal, wherein a first input signal of the at least two input signals includes a desired signal as a main component and a second input signal of the at least two input signals, include an undesired signal as main component, includes adaptive error processing the second input signal and at least one of the first input signal and the output signal to provide an estimated undesired signal representative of an estimate of undesired signal components included in the first input signal, and taking the difference between the estimated undesired signal and the first input signal to provide the output signal.
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公开(公告)号：US10789932B2
公开(公告)日：2020-09-29
申请号：US16341111
申请日：2016-10-20
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Juergen Zollner , Markus Christoph
IPC: G10K11/178
Abstract: An example active noise control filtering with an adaptive filter structure includes a controllable filter matrix with reference and error input signals, and updating the filter coefficients dependent on an optional filtered reference signal and an error signal, the error signal being representative of a performance criterion of the filter module. Further, a leakage functionality and a convergence functionality is applied to the updated filter coefficients. The leakage functionality is controlled by at least one of a flush functionality, freeze functionality, spatial freeze functionality and leakage threshold, and the convergence functionality is controlled by the freeze functionality and spatial freeze functionality.
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Patent Agency Ranking
公开(公告)号：US10325586B2
公开(公告)日：2019-06-18
申请号：US15441766
申请日：2017-02-24
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
IPC: G10K11/16 , G10K11/178 , G10K11/175
Abstract: A noise reducing comprises a first microphone that picks up noise signal at a first location and that is electrically coupled to a first microphone output path; a loudspeaker that is electrically coupled to a loudspeaker input path and that radiates noise reducing sound at a second location; a second microphone that picks up residual noise from the noise and the noise reducing sound at a third location and that is electrically coupled to a second microphone output path; a first active noise reducing filter that is connected between the first microphone output path and the loudspeaker input path; and a second active noise reducing filter that is connected between the second microphone output path and the loudspeaker input path; in which the first active noise reduction filter is a shelving or equalization filter or comprises at least one shelving or equalization filter or both.
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公开(公告)号：US10157606B2
公开(公告)日：2018-12-18
申请号：US15476634
申请日：2017-03-31
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
IPC: G10K11/178 , H04R5/02 , B60N2/427 , B60N2/879
Abstract: Active noise control systems and methods are disclosed that include generating with a first sub-system, anti-noise that is configured to reduce or cancel noise occurring at a listening position. Generating with a second sub-system, anti-noise that is configured to reduce or cancel noise occurring at the listening position. The first active noise control sub-system has a higher robustness than the second active noise control sub-system.
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公开(公告)号：US09584905B2
公开(公告)日：2017-02-28
申请号：US14293865
申请日：2014-06-02
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
Abstract: A system and a method for mixing at least two audio signals are provided that comprise transferring the audio signals with respective transfer functions, the audio signals each having an amplitude and a phase; adding the audio signals to provide an output signal representative of the mixed audio signals, the output signal having an amplitude and a phase; controlling at least one of the transfer functions of the signal lines so that the phase of the output signal is adapted to the phase of the audio signal with a higher signal strength than the other audio signal(s), the signal strengths corresponding to the amplitudes of the audio signals.
Abstract translation: 提供了一种用于混合至少两个音频信号的系统和方法，其包括以相应的传递函数传输音频信号，所述音频信号各自具有振幅和相位; 添加音频信号以提供表示混合音频信号的输出信号，该输出信号具有振幅和相位; 控制信号线的传递函数中的至少一个，使得输出信号的相位适应于具有比其他音频信号更高的信号强度的音频信号的相位，对应于幅度的信号强度 的音频信号。
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公开(公告)号：US09099076B2
公开(公告)日：2015-08-04
申请号：US13656274
申请日：2012-10-19
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph , Johann Freundorfer , Thomas Hommel
IPC: G10K11/178
CPC classification number: G10K11/178 , G10K2210/1081 , G10K2210/3028 , H04R3/002 , H04R2410/05
Abstract: A noise reducing sound reproduction system comprises a loudspeaker that is connected to a loudspeaker input path and that radiates noise reducing sound. A microphone is connected to a microphone output path and picks up the noise or a residual thereof. An active noise reduction filter is connected between the microphone output path and the loudspeaker input path, and the active noise reduction filter comprises at least one shelving filter.
Abstract translation: 降噪声音再现系统包括连接到扬声器输入路径并且辐射降噪声音的扬声器。 麦克风连接到麦克风输出路径并拾取噪声或其残差。 有源降噪滤波器连接在麦克风输出路径和扬声器输入路径之间，而主动降噪滤波器包括至少一个搁架滤波器。
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公开(公告)号：US11765504B2
公开(公告)日：2023-09-19
申请号：US17002674
申请日：2020-08-25
Applicant: Harman Becker Automotive Systems GmbH
Inventor： Markus Christoph
Abstract: Decorrelating an input signal includes allpass filtering to phase shift the first input signal by a phase shift, the allpass filtering comprising filtering with one or more subsequent controllable allpass filter stages, each controllable allpass filter stage having a filter quality and a cut-off frequency. Decorrelating further includes controlling at least one of the filter quality and the cut-off frequency of the controllable allpass filter stages to change over time.
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