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    METHODS AND SYSTEMS FOR AUDIO SIGNAL FILTERING
    1.
    发明申请
    METHODS AND SYSTEMS FOR AUDIO SIGNAL FILTERING 有权

    公开(公告)号：US20250126425A1

    公开(公告)日：2025-04-17

    申请号：US18986468

    申请日：2024-12-18

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER

    IPC: H04S1/00 ,  H04R5/033 ,  H04S7/00

    Abstract: Systems and methods for rendering audio signals are disclosed. In some embodiments, a method may receive an input signal including a first portion and the second portion. A first processing stage comprising a first filter is applied to the first portion to generate a first filtered signal. A second processing stage comprising a second filter is applied to the first portion to generate a second filtered signal. A third processing stage comprising a third filter is applied to the second portion to generate a third filtered signal. A fourth processing stage comprising a fourth filter is applied to the second portion to generate a fourth filtered signal. A first output signal is determined based on a sum of the first filtered signal and the third filtered signal. A second output signal is determined based on a sum of the second filtered signal and the fourth filtered signal. The first output signal is presented to a first ear of a user of a virtual environment, and the second output signal is presented to the second ear of the user. The first portion of the input signal corresponds to a first location in the virtual environment, and the second portion of the input signal corresponds to a second location in the virtual environment.

    SPATIAL AUDIO FOR INTERACTIVE AUDIO ENVIRONMENTS
    3.
    发明申请
    SPATIAL AUDIO FOR INTERACTIVE AUDIO ENVIRONMENTS 审中-公开

    公开(公告)号：US20190387350A1

    公开(公告)日：2019-12-19

    申请号：US16445163

    申请日：2019-06-18

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER ,  Brian Lloyd SCHMIDT

    IPC: H04S7/00 ,  H04R5/033 ,  H04R5/04 ,  H04S3/00 ,  H04R3/04 ,  G10K15/10

    Abstract: Systems and methods of presenting an output audio signal to a listener located at a first location in a virtual environment are disclosed. According to embodiments of a method, an input audio signal is received. For each sound source of a plurality of sound sources in the virtual environment, a respective first intermediate audio signal corresponding to the input audio signal is determined, based on a location of the respective sound source in the virtual environment, and the respective first intermediate audio signal is associated with a first bus. For each of the sound sources of the plurality of sound sources in the virtual environment, a respective second intermediate audio signal is determined. The respective second intermediate audio signal corresponds to a reverberation of the input audio signal in the virtual environment. The respective second intermediate audio signal is determined based on a location of the respective sound source, and further based on an acoustic property of the virtual environment. The respective second intermediate audio signal is associated with a second bus. The output audio signal is presented to the listener via the first bus and the second bus.

    INDEX SCHEMING FOR FILTER PARAMETERS
    5.
    发明公开
    INDEX SCHEMING FOR FILTER PARAMETERS 审中-公开

    公开(公告)号：US20230396923A1

    公开(公告)日：2023-12-07

    申请号：US18307713

    申请日：2023-04-26

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER

    IPC: H04R3/04 ,  H04R29/00

    CPC classification number: H04R3/04 ,  H04R29/001 ,  H04R2430/01

    Abstract: A method of processing an audio signal is disclosed. According to embodiments of the method, magnitude response information of a prototype filter is determined. The magnitude response information includes a plurality of gain values, at least one of which includes a first gain corresponding to a first frequency. The magnitude response information of the prototype filter is stored. The magnitude response information of the prototype filter at the first frequency is retrieved. Gains are computed for a plurality of control frequencies based on the retrieved magnitude response information of the prototype filter at the first frequency, and the computed gains are applied to the audio signal.

    ENVIRONMENT ACOUSTICS PERSISTENCE
    6.
    发明公开
    ENVIRONMENT ACOUSTICS PERSISTENCE 审中-公开

    公开(公告)号：US20230239651A1

    公开(公告)日：2023-07-27

    申请号：US18180746

    申请日：2023-03-08

    Applicant: Magic Leap, Inc

    Inventor： Remi Samuel AUDFRAY ,  Mark Brandon HERTENSTEINER ,  Samuel Charles DICKER ,  Blaine Ivin WOOD ,  Michael Z. LAND ,  Jean-Marc JOT

    IPC: H04S7/00 ,  H04R5/04

    CPC classification number: H04S7/306 ,  H04R5/04 ,  H04R2430/20

    Abstract: Disclosed herein are systems and methods for storing, organizing, and maintaining acoustic data for mixed reality systems. A system may include one or more sensors of a head-wearable device, a speaker of the head-wearable device, and one or more processors. A method performed by the one or more processors may include receiving a request to present an audio signal. An environment may be identified via the one or more sensors of the head-wearable device. One or more audio model components associated with the environment may be retrieved. A first audio model may be generated based on the audio model components. A second audio model may be generated based on the first audio model. A modified audio signal may be determined based on the second audio model and based on the request to present an audio signal. The modified audio signal may be presented via the speaker of the head-wearable device.

    REVERBERATION GAIN NORMALIZATION
    7.
    发明公开
    REVERBERATION GAIN NORMALIZATION 审中-公开

    公开(公告)号：US20240282289A1

    公开(公告)日：2024-08-22

    申请号：US18653795

    申请日：2024-05-02

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER

    IPC: G10K15/08

    CPC classification number: G10K15/08

    Abstract: Systems and methods for providing accurate and independent control of reverberation properties are disclosed. In some embodiments, a system may include a reverberation processing system, a direct processing system, and a combiner. The reverberation processing system can include a reverb initial power (RIP) control system and a reverberator. The RIP control system can include a reverb initial gain (RIG) and a RIP corrector. The RIG can be configured to apply a RIG value to the input signal, and the RIP corrector can be configured to apply a RIP correction factor to the signal from the RIG. The reverberator can be configured to apply reverberation effects to the signal from the RIP control system. In some embodiments, one or more values and/or correction factors can be calculated and applied such that the signal output from a component in the reverberation processing system is normalized to a predetermined value (e.g., unity (1.0)).

    MULTI-APPLICATION AUDIO RENDERING
    8.
    发明公开
    MULTI-APPLICATION AUDIO RENDERING 审中-公开

    公开(公告)号：US20240155305A1

    公开(公告)日：2024-05-09

    申请号：US18412167

    申请日：2024-01-12

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Mark Brandon HERTENSTEINER ,  Samuel Charles DICKER ,  Blaine Ivin WOOD ,  Michael Z. LAND

    IPC: H04S7/00

    CPC classification number: H04S7/306 ,  H04S7/304

    Abstract: Disclosed herein are systems and methods for efficiently rendering audio. A method may include receiving a request to present a first audio track, wherein the first audio track is based on a first audio model comprising a shared model component and a first model component; receiving a request to present a second audio track, wherein the second audio track is based on a second audio model comprising the shared model component and a second model component; rendering a sound based on the first audio track, the second audio track, the shared model component, the first model component, and the second model component; and presenting, via one or more speakers, the an audio signal comprising the rendered sound.

    NEAR-FIELD AUDIO RENDERING
    10.
    发明申请
    NEAR-FIELD AUDIO RENDERING 有权

    公开(公告)号：US20230094733A1

    公开(公告)日：2023-03-30

    申请号：US18061367

    申请日：2022-12-02

    Applicant: Magic Leap, Inc.

    Inventor： Remi Samuel AUDFRAY ,  Jean-Marc JOT ,  Samuel Charles DICKER ,  Mark Brandon HERTENSTEINER ,  Justin Dan MATHEW ,  Anastasia Andreyevna TAJIK ,  Nicholas John LaMARTINA

    IPC: H04S7/00 ,  H04R5/033 ,  H04R5/04 ,  H04S3/00

    Abstract: Examples of the disclosure describe systems and methods for presenting an audio signal to a user of a wearable head device. According to an example method, a source location corresponding to the audio signal is identified. For each of the respective left and right ear of the user, a virtual speaker position, of a virtual speaker array, is determined, the virtual speaker position collinear with the source location and with a position of the respective ear. For each of the respective left and right ear of the user, a head-related transfer function (HRTF) corresponding to the virtual speaker position and to the respective ear is determined; and the output audio signal is presented to the respective ear of the user via one or more speakers associated with the wearable head device. Processing the audio signal includes applying the HRTF to the audio signal.

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