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    Echo cancellation and control for microphone beam patterns
    81.
    发明授权
    Echo cancellation and control for microphone beam patterns 有权
    麦克风波束模式的回波消除和控制

    公开(公告)号：US09516409B1

    公开(公告)日：2016-12-06

    申请号：US14714023

    申请日：2015-05-15

    Applicant: Apple Inc.

    Inventor： Sean A. Ramprashad ,  Martin E. Johnson ,  Vasu Iyengar ,  Ronald N. Isaac

    IPC: H04B3/20 ,  H04R3/00 ,  H04R1/08 ,  H04B3/23

    CPC classification number: H04B3/23 ,  H04R1/403 ,  H04R1/406 ,  H04R3/02 ,  H04R2430/23

    Abstract: Systems and methods for controlling echo in audio communications between a near-end system and a far-end system are described. The system and method may intelligently assign a plurality of microphone beams to a limited number of echo cancellers for processing. The microphone beams may be classified based on generated statistics to determine beams of interest (e.g., beams with a high ratio of local-voice to echo). Based on this ranking/classification of microphone beams, beams of greater interest may be assigned to echo cancellers while less important beams may temporally remain unprocessed until these beams become of higher importance/interest. Accordingly, a limited number of echo cancellers may be used to intelligently process a larger number of microphone beams based on interest in the beams and properties of echo cancellation performed for each beam.

    Abstract translation: 描述了用于控制近端系统和远端系统之间的音频通信中回波的系统和方法。 该系统和方法可智能地将多个麦克风束分配给有限数量的回波消除器进行处理。 麦克风束可以基于生成的统计来分类，以确定感兴趣的波束（例如，具有高比例的本地话音到回波的波束）。 基于麦克风束的这种排序/分类，可以将更感兴趣的波束分配给回波消除器，而不太重要的波束可以暂时保持未处理，直到这些波束变得更高的重要性/兴趣。 因此，有限数量的回波消除器可以用于基于对光束的兴趣和针对每个光束执行的回波消除的特性来智能处理更大数量的麦克风束。

    Automatic acoustic handoff
    82.
    发明授权
    Automatic acoustic handoff 有权

    公开(公告)号：US12149919B2

    公开(公告)日：2024-11-19

    申请号：US17677808

    申请日：2022-02-22

    Applicant: Apple Inc.

    Inventor： Jonathan D. Sheaffer ,  Martin E. Johnson ,  Andrew P. Bright

    IPC: H04S7/00 ,  G10L25/21 ,  G10L25/60 ,  H04R1/10 ,  H04R1/40 ,  H04R3/00 ,  H04R5/033 ,  H04R5/04 ,  H04W76/14

    Abstract: Disclosed are systems and methods for automatically transitioning between communication modes of wearable audio output devices based solely on acoustic analysis. The audio output devices may operate in one of three electroacoustic modes. In the transparency mode, an audio output device may pass through the speech signal of a nearby user. In the peer-to-peer mode, the audio output device may establish a direct low-latency radio frequency (RF) link to another audio output device. In the telephony mode, the audio output device may communicate with another audio output device using networked telephony. The disclosed methods and systems perform acoustic analysis of the near-field speech signal of a local wearer of the audio output device and the far-field speech signal of a remote talker to determine the best mode for the audio output device to use and to seamlessly transition between the modes as the acoustic environment between the wearers changes.

    Acoustic identification of audio products
    85.
    发明授权
    Acoustic identification of audio products 有权

    公开(公告)号：US11726161B1

    公开(公告)日：2023-08-15

    申请号：US17464559

    申请日：2021-09-01

    Applicant: Apple Inc.

    Inventor： Christopher T. Eubank ,  Martin E. Johnson ,  Daniel K. Boothe ,  Jonathan D. Sheaffer

    IPC: G01S3/808 ,  G06F16/68 ,  H04R3/00 ,  H04S7/00

    CPC classification number: G01S3/8083 ,  G06F16/686 ,  H04R3/005 ,  H04S7/301

    Abstract: Disclosed are techniques for a multimedia device with audio and video capturing capability to identify an audio device based on acoustic playback signal if the audio device cannot be identified from captured video. The multimedia device may assemble a list of candidate audio devices that are a possible match for the observed audio device from a database of previously recognized audio devices and may transmit commands to the candidate audio devices to play acoustic identification signals. The acoustic identification signals may be audible sound or ultrasonic tone sequences with embedded identification information unique to each audio device. The multimedia device may record and analyze the acoustic identification signals received from any of the candidate audio devices to construct metrics to select the most likely candidate for the observed audio device. The metrics may include time of flight, direction of arrival, received amplitude, direct-to-reverberant ratio (DRR) of the acoustic identification signals.

    SPATIAL AUDIO CONTROLLER
    86.
    发明申请
    SPATIAL AUDIO CONTROLLER 有权

    公开(公告)号：US20220394407A1

    公开(公告)日：2022-12-08

    申请号：US17339864

    申请日：2021-06-04

    Applicant: Apple Inc.

    Inventor： Sean A. Ramprashad ,  Peter D. Callaway ,  Jae Woo Chang ,  Martin E. Johnson ,  Daniel K. Boothe ,  Kostyantyn Komarov ,  Patrick Miauton ,  Christopher M. Garrido ,  Austin W. Shyu ,  Karthick Santhanam

    IPC: H04S3/00 ,  H04S7/00 ,  G06F3/0487 ,  H04S5/00 ,  H04R3/00

    Abstract: A method performed a local device that is communicatively coupled with several remote devices, the method includes: receiving, from each remote device with which the local device is engaged in a communication session, an input audio stream; receiving, for each remote device, a set parameters; determining, for each input audio stream, whether the input audio stream is to be 1) rendered individually or 2) rendered as a mix of input audio streams based on the set of parameters; for each input audio stream that is determined to be rendered individually, spatial rendering the input audio stream as an individual virtual sound source that contains only that input audio stream; and for input audio streams that are determined to be rendered as the mix of input audio streams, spatial rendering the mix of input audio streams as a single virtual sound source that contains the mix of input audio streams.

    SPATIAL AUDIO REPRODUCTION BASED ON HEAD-TO-TORSO ORIENTATION
    87.
    发明申请
    SPATIAL AUDIO REPRODUCTION BASED ON HEAD-TO-TORSO ORIENTATION 有权

    公开(公告)号：US20220329965A1

    公开(公告)日：2022-10-13

    申请号：US17847095

    申请日：2022-06-22

    Applicant: Apple Inc.

    Inventor： Antti J. Vanne ,  Darius A. Satongar ,  James W. Vandyke ,  Juha O. Merimaa ,  Martin E. Johnson ,  Tomi A. Huttunen

    IPC: H04S7/00 ,  H04R5/04 ,  G06F3/01 ,  H04R5/033

    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.

    AUTOMATIC ACOUSTIC HANDOFF
    88.
    发明申请
    AUTOMATIC ACOUSTIC HANDOFF 有权

    公开(公告)号：US20220279305A1

    公开(公告)日：2022-09-01

    申请号：US17677808

    申请日：2022-02-22

    Applicant: Apple Inc.

    Inventor： Jonathan D. Sheaffer ,  Martin E. Johnson ,  Andrew P. Bright

    IPC: H04S7/00 ,  G10L25/21 ,  H04R1/40 ,  H04R3/00 ,  H04R1/10 ,  H04R5/033 ,  G10L25/60 ,  H04R5/04

    Abstract: Disclosed are systems and methods for automatically transitioning between communication modes of wearable audio output devices based solely on acoustic analysis. The audio output devices may operate in one of three electroacoustic modes. In the transparency mode, an audio output device may pass through the speech signal of a nearby user. In the peer-to-peer mode, the audio output device may establish a direct low-latency radio frequency (RF) link to another audio output device. In the telephony mode, the audio output device may communicate with another audio output device using networked telephony. The disclosed methods and systems perform acoustic analysis of the near-field speech signal of a local wearer of the audio output device and the far-field speech signal of a remote talker to determine the best mode for the audio output device to use and to seamlessly transition between the modes as the acoustic environment between the wearers changes.

    BINAURAL ROOM IMPULSE RESPONSE FOR SPATIAL AUDIO REPRODUCTION
    89.
    发明申请
    BINAURAL ROOM IMPULSE RESPONSE FOR SPATIAL AUDIO REPRODUCTION 有权

    公开(公告)号：US20210398545A1

    公开(公告)日：2021-12-23

    申请号：US17316408

    申请日：2021-05-10

    Applicant: Apple Inc.

    Inventor： Martin E. Johnson ,  Juha O. Merimaa

    IPC: G10L19/008 ,  H04S3/00 ,  H04S7/00

    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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