公开(公告)号：US20220200541A1

公开(公告)日：2022-06-23

申请号：US17695065

申请日：2022-03-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jie SUN ,  Yijun SUN ,  Hailei SUO ,  Jinhu CHEN ,  Song LI

IPC: H03F1/42 ,  H03F3/24 ,  H03F1/56

Abstract: A power amplifier circuit, a transmitter, and a network device are provided. The power amplifier circuit includes N input ports, N power amplifier branches, one combiner circuit, and one output port. Each of the N input ports is connected to one power amplifier branch, each of the power amplifier branches is connected to the combiner circuit, and the combiner circuit is further connected to the output port; the N power amplifier branches and the combiner circuit are configured to perform power amplification and combining on N input signals, to generate an output signal. The N power amplifier branches include one first power amplifier branch operates in a class AB or class B operating mode, and N−1 second power amplifier branches operate in a class C operating mode with different gate bias voltages, the gate bias voltages of the N−1 second power amplifier branches become lower in order.

公开(公告)号：US20210231488A1

公开(公告)日：2021-07-29

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

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.

公开(公告)号：US20210250686A1

公开(公告)日：2021-08-12

申请号：US17245294

申请日：2021-04-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liyun PANG ,  Fons ADRIAENSEN ,  Roman SCHLIEPER ,  Song LI

IPC: H04R3/04 ,  G10K11/00 ,  H04R1/10

Abstract: A method for processing an audio signal, the method including: processing the audio signal according to a pair of mouth to ear transfer functions to obtain a processed audio signal; filtering the processed audio signal, using a pair of equalization filters, to obtain a filtered audio signal, where a parameter of the equalization filter is depends on an acoustic impedance of a headphone; and outputting the filtered audio signal to the headphone. Accordingly, this method counteracts the occlusion effect and to provides a natural perceived sound pressure.

公开(公告)号：US20200333444A1

公开(公告)日：2020-10-22

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.

公开(公告)号：US20210398515A1

公开(公告)日：2021-12-23

申请号：US17464286

申请日：2021-09-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liyun PANG ,  Fons ADRIAENSEN ,  Roman SCHLIEPER ,  Song LI

IPC: G10K11/178 ,  H04R1/10

Abstract: The present disclosure provides a method for evaluating an electronic device. The method comprises determining, with an acoustic tube, a value of a first parameter, the value of the first parameter being indicative of the acoustic impedance of a reference termination. The method further comprises determining, with the acoustic tube, a value of a second parameter, the value of the second parameter being indicative of the acoustic impedance of the reference termination, when occluded by the electronic device. The method then comprises calculating a value of a third parameter, the value of the third parameter being indicative of the acoustic impedance of the electronic device, based on the value of the first parameter and the value of the second parameter.

公开(公告)号：US20210352425A1

公开(公告)日：2021-11-11

申请号：US17384124

申请日：2021-07-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Liyun PANG ,  Fons ADRIAENSEN ,  Song LI ,  Roman SCHLIEPER

IPC: H04S3/00 ,  H04S7/00

Abstract: The disclosure relates to a method for processing a stereo signal. The method can include obtaining a center channel signal by up-mixing the stereo signal. The method can also include generating a filtered center channel signal by applying one or more peak filters and one or more notch filters to the center channel signal. Furthermore, the method can include generating a binaural signal based on the filtered center channel signal.

公开(公告)号：US20200301132A1

公开(公告)日：2020-09-24

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

Abstract: This application discloses a beam scanning apparatus with arrayed rotating mirrors, and the beam scanning apparatus includes a motor (1), a worm (2), a wormgear (3), a mounting rack (4), and a rotating mirror (5), where the worm (2) and the wormgear (3) are located on the mounting rack (4), and engage with each other by using a gear (11) for a linkage connection; the rotating mirror (5) is located in the mounting rack (4), and is coaxially connected to the wormgear (3); and the motor (1) is configured to drive the worm (2) to rotate, to drive the wormgear (3) and the rotating mirror (5) to rotate coaxially. The rotating mirror (5) may be replaced with another rotating mirror (5) with a different structure and a different optical parameter, to adjust output performance of the beam scanning apparatus, thereby improving extensibility.

公开(公告)号：US20140306765A1

公开(公告)日：2014-10-16

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: H03F3/24 ,  H03F1/02

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。