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公开(公告)号：US12063497B2
公开(公告)日：2024-08-13
申请号：US18451794
申请日：2023-08-17
申请人： Magic Leap, Inc.
发明人： Remi Samuel Audfray , Jean-Marc Jot , Samuel Charles Dicker , Mark Brandon Hertensteiner , Justin Dan Mathew , Anastasia Andreyevna Tajik , Nicholas John LaMartina
CPC分类号： H04S7/304 , H04R5/033 , H04R5/04 , H04S3/008 , H04S2400/01 , H04S2400/11 , H04S2420/01
摘要： 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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公开(公告)号：US12008982B2
公开(公告)日：2024-06-11
申请号：US18296901
申请日：2023-04-06
申请人： Magic Leap, Inc.
CPC分类号： G10K15/08
摘要： 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)).
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公开(公告)号：US11197118B2
公开(公告)日：2021-12-07
申请号：US16593950
申请日：2019-10-04
申请人： Magic Leap, Inc.
摘要： 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 first input audio signal is received, the first input audio signal corresponding to a source location in a virtual environment presented to the user via the wearable head device. The first input audio signal is processed to generate a left output audio signal and a right output audio signal. The left output audio signal is presented to the left ear of the user via a left speaker associated with the wearable head device. The right output audio signal is presented to the right ear of the user via a right speaker associated with the wearable head device. Processing the first input audio signal comprises applying a delay process to the first input audio signal to generate a left audio signal and a right audio signal; adjusting a gain of the left audio signal; adjusting a gain of the right audio signal; applying a first head-related transfer function (HRTF) to the left audio signal to generate the left output audio signal; and applying a second HRTF to the right audio signal to generate the right output audio signal. Applying the delay process to the first input audio signal comprises applying an interaural time delay (ITD) to the first input audio signal, the ITD determined based on the source location.
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公开(公告)号：US11134357B2
公开(公告)日：2021-09-28
申请号：US16861111
申请日：2020-04-28
申请人： Magic Leap, Inc.
IPC分类号： H04S7/00 , G10L19/008 , G10L25/21 , H04S3/00
摘要： An audio system and method of spatially rendering audio signals that uses modified virtual speaker panning is disclosed. The audio system may include a fixed number F of virtual speakers, and the modified virtual speaker panning may dynamically select and use a subset P of the fixed virtual speakers. The subset P of virtual speakers may be selected using a low energy speaker detection and culling method, a source geometry-based culling method, or both. One or more processing blocks in the decoder/virtualizer may be bypassed based on the energy level of the associated audio signal or the location of the sound source relative to the user/listener, respectively. In some embodiments, a virtual speaker that is designated as an active virtual speaker at a first time, may also be designated as an active virtual speaker at a second time to ensure the processing completes.
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公开(公告)号：US10887720B2
公开(公告)日：2021-01-05
申请号：US16593944
申请日：2019-10-04
申请人： Magic Leap, Inc.
摘要： 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 first input audio signal is received. The first input audio signal is processed to generate a first output audio signal. The first output audio signal is presented via one or more speakers associated with the wearable head device. Processing the first input audio signal comprises applying a pre-emphasis filter to the first input audio signal; adjusting a gain of the first input audio signal; and applying a de-emphasis filter to the first audio signal. Applying the pre-emphasis filter to the first input audio signal comprises attenuating a low frequency component of the first input audio signal. Applying the de-emphasis filter to the first input audio signal comprises attenuating a high frequency component of the first input audio signal.
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公开(公告)号：US10667072B2
公开(公告)日：2020-05-26
申请号：US16438358
申请日：2019-06-11
申请人： Magic Leap, Inc.
IPC分类号： H04S7/00 , G10L19/008 , G10L25/21 , H04S3/00
摘要： An audio system and method of spatially rendering audio signals that uses modified virtual speaker panning is disclosed. The audio system may include a fixed number F of virtual speakers, and the modified virtual speaker panning may dynamically select and use a subset P of the fixed virtual speakers. The subset P of virtual speakers may be selected using a low energy speaker detection and culling method, a source geometry-based culling method, or both. One or more processing blocks in the decoder/virtualizer may be bypassed based on the energy level of the associated audio signal or the location of the sound source relative to the user/listener, respectively. In some embodiments, a virtual speaker that is designated as an active virtual speaker at a first time, may also be designated as an active virtual speaker at a second time to ensure the processing completes.
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公开(公告)号：US11910183B2
公开(公告)日：2024-02-20
申请号：US17174287
申请日：2021-02-11
申请人： Magic Leap, Inc.
发明人： Remi Samuel Audfray , Mark Brandon Hertensteiner , Samuel Charles Dicker , Blaine Ivin Wood , Michael Z. Land
IPC分类号： H04S7/00
摘要： 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.
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公开(公告)号：US20240048933A1
公开(公告)日：2024-02-08
申请号：US18486938
申请日：2023-10-13
申请人： Magic Leap, Inc.
IPC分类号： H04S7/00 , G10L19/008 , G10L25/21 , H04S3/00
CPC分类号： H04S7/303 , G10L19/008 , G10L25/21 , H04S3/008 , H04S2400/01 , H04S2420/01
摘要： An audio system and method of spatially rendering audio signals that uses modified virtual speaker panning is disclosed. The audio system may include a fixed number F of virtual speakers, and the modified virtual speaker panning may dynamically select and use a subset P of the fixed virtual speakers. The subset P of virtual speakers may be selected using a low energy speaker detection and culling method, a source geometry-based culling method, or both. One or more processing blocks in the decoder/virtualizer may be bypassed based on the energy level of the associated audio signal or the location of the sound source relative to the user/listener, respectively. In some embodiments, a virtual speaker that is designated as an active virtual speaker at a first time, may also be designated as an active virtual speaker at a second time to ensure the processing completes.
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公开(公告)号：US11696087B2
公开(公告)日：2023-07-04
申请号：US17900709
申请日：2022-08-31
申请人： Magic Leap, Inc.
CPC分类号： H04S7/304 , H04R3/04 , H04R5/033 , H04R5/04 , H04S3/008 , H04S7/307 , H04S2400/01 , H04S2400/11 , H04S2400/13 , H04S2420/01
摘要： 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 first input audio signal is received. The first input audio signal is processed to generate a first output audio signal. The first output audio signal is presented via one or more speakers associated with the wearable head device. Processing the first input audio signal comprises applying a pre-emphasis filter to the first input audio signal; adjusting a gain of the first input audio signal; and applying a de-emphasis filter to the first audio signal. Applying the pre-emphasis filter to the first input audio signal comprises attenuating a low frequency component of the first input audio signal. Applying the de-emphasis filter to the first input audio signal comprises attenuating a high frequency component of the first input audio signal.
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公开(公告)号：US11651762B2
公开(公告)日：2023-05-16
申请号：US17568588
申请日：2022-01-04
申请人： Magic Leap, Inc.
CPC分类号： G10K15/08
摘要： 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)).
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