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公开(公告)号：US20220405043A1
公开(公告)日：2022-12-22
申请号：US17355098
申请日：2021-06-22
Applicant: Apple Inc.
Inventor： Hilary K. Mogul , Eric J. Day , Hannes Breitschaedel , Juha O. Merimaa
Abstract: A method performed by an audio source device that is communicatively coupled with an audio output device, the method includes obtaining an audio signal; receiving a volume adjustment; applying the volume adjustment to the audio signal; applying dynamic range compression on the volume adjusted audio signal; and applying an inverse volume adjustment to the compressed audio signal, where the inverse volume adjusted audio signal is to be transmitted to the audio output device.
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公开(公告)号：US11417347B2
公开(公告)日：2022-08-16
申请号：US17316408
申请日：2021-05-10
Applicant: Apple Inc.
Inventor： Martin E. Johnson , Juha O. Merimaa
IPC: G10L19/008 , H04S7/00 , H04S3/00
Abstract: A binaural room impulse response (BRIR) can be generated based on a position of a listener's head, and a plurality of head related impulse responses (HRIRs). Each of the plurality of HRIRs are selected for a respective one of a plurality of acoustic reflections which, when taken together, approximate reverberation of a room. Each of the acoustic reflections have a direction and a delay. The BRIR filter is applied to source audio to generate binaural audio output.
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公开(公告)号：US11375333B1
公开(公告)日：2022-06-28
申请号：US17023160
申请日：2020-09-16
Applicant: Apple Inc.
Inventor： Antti J. Vanne , Darius A. Satongar , James W. Vandyke , Juha O. Merimaa , Martin E. Johnson , Tomi A. Huttunen
Abstract: A media system and a method of using the media system to reproduce spatial audio based on head-to-torso orientation, are described. The method includes determining a head-to-source orientation and a head-to-torso orientation based on head orientation data generated by a head tracking device. Determining the head-to-torso orientation includes determining torso movements based on movements of the head. The torso can be determined to move when the head movements meet a head movement condition, such as a predetermined angle of movement or pattern of movement. A binaural audio filter that is based on a head-related transfer function corresponding to both the head-to-source orientation and the head-to-torso orientation is applied to an audio input signal to generate an audio output signal. The audio output signal is played to accurately recreate spatial audio having sounds emitted to the user by a sound source. Other aspects are also described and claimed.
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公开(公告)号：US11202164B2
公开(公告)日：2021-12-14
申请号：US16651316
申请日：2018-09-25
Applicant: Apple Inc.
Inventor： Juha O. Merimaa , Christopher T. Eubank , Martin E. Johnson , Stuart J. Wood , Deepak Natarajan
Abstract: Methods and apparatus for predictive head-tracked binaural audio rendering in which a rendering device renders multiple audio streams for different possible head locations based on head tracking data received from a headset, for example audio streams for the last known location and one or more predicted or possible locations, and transmits the multiple audio streams to the headset. The headset then selects and plays one of the audio streams that is closest to the actual head location based on current head tracking data. If none of the audio streams closely match the actual head location, two closest audio streams may be mixed. Transmitting multiple audio streams to the headset and selecting or mixing an audio stream on the headset may mitigate or eliminate perceived head tracking latency.
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公开(公告)号：US10524080B1
公开(公告)日：2019-12-31
申请号：US16111045
申请日：2018-08-23
Applicant: Apple Inc.
Inventor： Martin E. Johnson , Darius A. Satongar , Stuart J. Wood , Lance F. Reichert , Juha O. Merimaa , Joshua D. Atkins
Abstract: An audio processing system has one or more processors that process an audio signal on three paths. The first path has a direct gain and a direct virtual source algorithm operating on the audio signal. The second path has a plurality of early reflection gains operating on the audio signal. Operation with the early reflection gains produces a plurality of early reflections. Each of the early reflection signals may be subjected to a delay and may be processed according to an early reflections virtual source algorithm. The third path has a reverb gain and binaural reverb filters operating on the audio signal. The third path also has a crosstalk canceler. A mixer combines left and right channel outputs of each of the first path, second path and third path. The mixer produces a left loudspeaker signal and a right loudspeaker signal.
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Patent Agency Ranking
公开(公告)号：US20220394406A1
公开(公告)日：2022-12-08
申请号：US17737897
申请日：2022-05-05
Applicant: Apple Inc.
Inventor： Juha O. Merimaa , Abdullah Fahim , Andrey D. Del Pozo , Joshua D. Atkins
Abstract: A method performed by a programmed processor of an audio system, the method includes receiving a sound track that has a track length, producing a binaural audio version of a sound track, the binaural audio version having an extended track length performing a fading operation upon the binaural audio version to gradually reduce a signal level of the binaural audio version to below a signal threshold level at a time along the extended track length that corresponds to an end time of the track length of the sound track; and storing the binaural audio version having the track length of the sound track in memory for later transmission to an audio playback device for driving one or more speakers.
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公开(公告)号：US20220174449A1
公开(公告)日：2022-06-02
申请号：US17673721
申请日：2022-02-16
Applicant: Apple Inc.
Inventor： Darius A. Satongar , Afrooz Family , Sylvain J. Choisel , Juha O. Merimaa
Abstract: A binaural sound reproduction system, and methods of using the binaural sound reproduction system to dynamically re-center a frame of reference for a virtual sound source, are described. The binaural sound reproduction system may include a reference device, e.g., a mobile device, having a reference sensor to provide reference orientation data corresponding to a direction of the reference device, and a head-mounted device, e.g., headphones, having a device sensor to provide device orientation data corresponding to a direction of the head-mounted device. The system may use the reference orientation data to determine whether the head-mounted device is being used in a static or dynamic use case, and may adjust an audio output to render the virtual sound source in an adjusted source direction based on the determined use case. Other embodiments are also described and claimed.
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公开(公告)号：US20210098004A1
公开(公告)日：2021-04-01
申请号：US16584706
申请日：2019-09-26
Applicant: Apple Inc.
Inventor： Dipanjan Sen , Frank Baumgarte , Juha O. Merimaa
IPC: G10L19/008 , H04S7/00 , H04S3/00
Abstract: A first layer of data having a first set of Ambisonic audio components can be decoded where the first set of Ambisonic audio components is generated based on ambience and one or more object-based audio signals. A second layer of data is decoded having at least one of the one or more object-based audio signals. One of the object-based audio signals is subtracted from the first set of Ambisonic audio components. The resulting Ambisonic audio components are rendered to generate a first set of audio channels. The one or more object-based audio signals are spatially rendered to generate a second set of audio channels. Other aspects are described and claimed.
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公开(公告)号：US20200260211A1
公开(公告)日：2020-08-13
申请号：US16865185
申请日：2020-05-01
Applicant: Apple Inc.
Inventor： Darius A. Satongar , Afrooz Family , Sylvain J. Choisel , Juha O. Merimaa
Abstract: A binaural sound reproduction system, and methods of using the binaural sound reproduction system to dynamically re-center a frame of reference for a virtual sound source, are described. The binaural sound reproduction system may include a reference device, e.g., a mobile device, having a reference sensor to provide reference orientation data corresponding to a direction of the reference device, and a head-mounted device, e.g., headphones, having a device sensor to provide device orientation data corresponding to a direction of the head-mounted device. The system may use the reference orientation data to determine whether the head-mounted device is being used in a static or dynamic use case, and may adjust an audio output to render the virtual sound source in an adjusted source direction based on the determined use case. Other embodiments are also described and claimed.
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公开(公告)号：US20200236489A1
公开(公告)日：2020-07-23
申请号：US16651316
申请日：2018-09-25
Applicant: Apple Inc.
Inventor： Juha O. Merimaa , Christopher T. Eubank , Martin E. Johnson , Stuart J. Wood , Deepak Natarajan
Abstract: Methods and apparatus for predictive head-tracked binaural audio rendering in which a rendering device renders multiple audio streams for different possible head locations based on head tracking data received from a headset, for example audio streams for the last known location and one or more predicted or possible locations, and transmits the multiple audio streams to the headset. The headset then selects and plays one of the audio streams that is closest to the actual head location based on current head tracking data. If none of the audio streams closely match the actual head location, two closest audio streams may be mixed. Transmitting multiple audio streams to the headset and selecting or mixing an audio stream on the headset may mitigate or eliminate perceived head tracking latency.
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