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    ACTIVE NOISE REDUCTION HEADPHONES AND METHOD
    3.
    发明公开
    ACTIVE NOISE REDUCTION HEADPHONES AND METHOD 审中-公开

    公开(公告)号：US20240135913A1

    公开(公告)日：2024-04-25

    申请号：US18400971

    申请日：2023-12-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Liyun Pang ,  Fons Adriaensen ,  Song Li ,  Roman Schlieper

    IPC: G10K11/178

    CPC classification number: G10K11/17854 ,  G10K2210/1081

    Abstract: ANR headphones generate a sound signal, and include a loudspeaker, an external microphone configured to detect an ambient noise signal, and an internal microphone configured to detect a residual noise signal within an ear canal of the user. Moreover, the ANR headphones have an acceleration sensor configured to generate an acceleration signal indicative of accelerations experienced by the ANR headphones. A controller of the ANR headphones is configured to generate a loudspeaker signal based on a composite compensation signal. The composite compensation signal is a combination of an ambient noise compensation signal based on the ambient noise signal, a residual noise compensation signal based on the residual noise signal and an acceleration compensation signal based on the acceleration signal.

    AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE
    4.
    发明公开
    AUDIO CONTROLLER FOR A SEMI-ADAPTIVE ACTIVE NOISE REDUCTION DEVICE 审中-公开

    公开(公告)号：US20230362542A1

    公开(公告)日：2023-11-09

    申请号：US18311063

    申请日：2023-05-02

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Liyun Pang ,  Fons Adriaensen ,  Song Li ,  Roman Schlieper

    IPC: H04R3/04 ,  H04R5/04 ,  H04R5/033

    CPC classification number: H04R3/04 ,  H04R5/04 ,  H04R5/033 ,  H04R2460/01

    Abstract: An audio controller for an active noise reduction, ANR, reduces an ambient noise signal. The audio controller includes processing circuitry configured to provide a fixed ANR filter configured to generate a first noise reduction signal. Moreover, the processing circuitry is further configured to provide an adaptive ANR filter. The adaptive ANR filter includes one or more adjustable filter coefficients for adapting the adaptive ANR filter and the adaptive ANR filter is configured to generate a second noise reduction signal. The processing circuitry is further configured to generate a total noise reduction signal as an adjustable weighted linear combination of the first noise reduction signal and the second noise reduction signal.

    Device and method for adaptation of virtual 3D audio to a real room
    6.
    发明授权
    Device and method for adaptation of virtual 3D audio to a real room 有权

    公开(公告)号：US11668600B2

    公开(公告)日：2023-06-06

    申请号：US17205916

    申请日：2021-03-18

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Liyun Pang ,  Fons Adriaensen ,  Song Li ,  Roman Schlieper

    IPC: G01H7/00

    CPC classification number: G01H7/00 ,  H04S2420/01

    Abstract: The invention relates to the technical fields of binaural audio rendering and, to this end, estimation of room acoustic parameters like reverberation time. In particular, the invention provides a device and method for estimating such acoustic parameters. The device is configured to record an acoustic signal, particularly a speech signal, to estimate a frequency-dependent reverberation time in a lower frequency range based on the recorded acoustic signal, and to extend the frequency-dependent reverberation time to a higher frequency range based on a predetermined model to obtain an extended frequency-dependent reverberation time. Virtual 3D audio can thus be adapted to a real room.

    Beam scanning apparatus with arrayed rotating mirrors
    7.
    发明授权
    Beam scanning apparatus with arrayed rotating mirrors 有权

    公开(公告)号：US11650413B2

    公开(公告)日：2023-05-16

    申请号：US16895792

    申请日：2020-06-08

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Liding Fu ,  Guangyuan Shi ,  Song Li

    IPC: G02B26/12 ,  G02B7/182

    CPC classification number: G02B26/121 ,  G02B7/1821 ,  G02B26/127

    Abstract: A beam scanning apparatus with arrayed rotating mirrors is provided. The beam scanning apparatus includes a motor, a worm, a wormgear, a mounting rack, and a rotating mirror, where the worm and the wormgear are located on the mounting rack, and engage with each other by using a gear for a linkage connection; the rotating mirror is located in the mounting rack, and is coaxially connected to the wormgear; and the motor is configured to drive the worm to rotate, to drive the wormgear and the rotating mirror to rotate coaxially. The rotating mirror may be replaced with another rotating mirror with a different structure and a different optical parameter, to adjust output performance of the beam scanning apparatus, thereby improving extensibility.

    Multi-line laser radar
    8.
    发明授权
    Multi-line laser radar 有权

    公开(公告)号：US11513193B2

    公开(公告)日：2022-11-29

    申请号：US16915816

    申请日：2020-06-29

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Liding Fu ,  Guangyuan Shi ,  Song Li

    IPC: G01S7/481 ,  G02B26/12

    Abstract: A multi-line laser radar includes a first radar component, where the first radar component includes n lasers, an optical collimating unit, a scanning rotating mirror, and a detector, where n is greater than 1. Each laser is configured to emit one laser beam to the optical collimating unit. The optical collimating unit is configured to collimate n laser beams, where the collimated n laser beams are incident on a target reflector of the scanning rotating mirror. The scanning rotating mirror includes m reflectors rotating around a rotation axis, where a rotation plane of the rotation axis is perpendicular to an arrangement direction of the collimated n laser beams, and m is greater than 1. The target reflector reflects the received collimated n laser beams to a detection area of the first radar component. The detector receives echo signals of the reflected n laser beams in the detection area.

    Doherty power amplifier, and method and device for improving power amplification efficiency of Doherty power amplifier
    9.
    发明授权
    Doherty power amplifier, and method and device for improving power amplification efficiency of Doherty power amplifier 有权
    Doherty功率放大器，以及提高Doherty功率放大器功率放大效率的方法和装置

    公开(公告)号：US08994450B2

    公开(公告)日：2015-03-31

    申请号：US14289295

    申请日：2014-05-28

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Xikun Zhang ,  Yawen Zhang ,  Song Li ,  Qiao Wu ,  Xuekun Li

    IPC: H03F3/18 ,  H03F3/24 ,  H03F1/02 ,  H03F3/21

    CPC classification number: H03F3/245 ,  H03F1/0272 ,  H03F1/0288 ,  H03F3/211 ,  H03F2200/18 ,  H03F2203/21106

    Abstract: One aspect of the present invention provides a method for improving power amplification efficiency of a Doherty power amplifier. The method is applied to a Doherty power amplifier that has two paths of Doherty circuit units connected in parallel. The method includes: when output power of the Doherty power amplifier is within a low out power range, adjusting, by a bias circuit, gate voltages of main power amplifiers and peak power amplifiers in the two paths of Doherty circuit units connected in parallel, in order to cause the peak power amplifiers to be in an off state, and the main power amplifiers in the two paths of Doherty circuit units connected in parallel to be in a main power amplification state and a peak power amplification state respectively.

    Abstract translation: 本发明的一个方面提供了一种用于提高多赫蒂功率放大器的功率放大效率的方法。 该方法应用于Doherty功率放大器，其具有并联连接的Doherty电路单元的两条路径。 该方法包括：当Doherty功率放大器的输出功率处于低功率范围内时，通过偏置电路调节并联连接的Doherty电路单元的两个路径中的主功率放大器和峰值功率放大器的栅极电压， 以使峰值功率放大器处于断开状态，并且Doherty电路单元的两个路径中的主功率放大器分别并联连接成主功率放大状态和峰值功率放大状态。

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