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    Low delay decimator and interpolator filters
    1.
    发明授权
    Low delay decimator and interpolator filters 有权

    公开(公告)号：US10904661B2

    公开(公告)日：2021-01-26

    申请号：US16177308

    申请日：2018-10-31

    Applicant: SYNAPTICS INCORPORATED

    Inventor： Jens Kristian Poulsen ,  Trausti Thormundsson ,  Ali Abdollahzadeh Milani ,  Mark Miller

    IPC: H03H17/02 ,  G10K11/178 ,  H04R3/04 ,  G10L21/0216 ,  H04R1/10 ,  H04R3/00

    Abstract: Systems and methods for low latency adaptive noise cancellation include an audio sensor to sense environmental noise and generate a noise signal, an audio processing path to receive an audio signal, process the audio signal through an interpolation filter, and generate a primary audio signal having a first sample frequency, an adaptive noise cancellation processor to receive the noise signal and generate an anti-noise signal, a direct interpolator to receive the anti-noise signal and generate an anti-noise signal having the first sample frequency, and a limiter to provide clipping to reduce a number of bits in the anti-noise signal, an adder operable to combine the primary audio signal and the anti-noise signal and generate a combined output signal, and a low latency filter to process the combined output signal.

    LOW DELAY DECIMATOR AND INTERPOLATOR FILTERS
    2.
    发明申请
    LOW DELAY DECIMATOR AND INTERPOLATOR FILTERS 审中-公开

    公开(公告)号：US20190132679A1

    公开(公告)日：2019-05-02

    申请号：US16177308

    申请日：2018-10-31

    Applicant: SYNAPTICS INCORPORATED

    Inventor： Jens Kristian Poulsen ,  Trausti Thormundsson ,  Ali Abdollahzadeh Milani ,  Mark Miller

    IPC: H04R3/04 ,  G10L21/0216

    Abstract: Systems and methods for low latency adaptive noise cancellation include an audio sensor to sense environmental noise and generate a noise signal, an audio processing path to receive an audio signal, process the audio signal through an interpolation filter, and generate a primary audio signal having a first sample frequency, an adaptive noise cancellation processor to receive the noise signal and generate an anti-noise signal, a direct interpolator to receive the anti-noise signal and generate an anti-noise signal having the first sample frequency, and a limiter to provide clipping to reduce a number of bits in the anti-noise signal, an adder operable to combine the primary audio signal and the anti-noise signal and generate a combined output signal, and a low latency filter to process the combined output signal.

    Methods and systems for end-user tuning of an active noise cancelling audio device
    4.
    发明授权
    Methods and systems for end-user tuning of an active noise cancelling audio device 有权

    公开(公告)号：US11030989B2

    公开(公告)日：2021-06-08

    申请号：US15853645

    申请日：2017-12-22

    Applicant: SYNAPTICS INCORPORATED

    Inventor： Trausti Thormundsson ,  Govind Kannan ,  Ali Abdollahzadeh Milani ,  Ragnar Hlynur Jonsson

    IPC: G10K11/178 ,  H04R1/10

    Abstract: An active noise cancellation system includes a sensor operable to sense environmental noise and generate a corresponding reference signal, a fixed noise cancellation filter including a predetermined model of the active noise cancellation system operable to generate an anti-noise signal, and a tunable noise cancellation filter operable to modify the anti-noise signal in accordance with stored coefficients, wherein the tunable noise cancellation filter is further operable to modify the stored coefficients in real-time based on user feedback and generate a tuned anti-noise signal that models tunable deviations from the predetermined noise model. A graphical user interface is operable to receive user adjustments of tunable parameters in real-time, the tunable parameters corresponding to at least one of the stored coefficients.

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