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    Apparatus and method for weighting stereo audio signals
    1.
    发明授权
    Apparatus and method for weighting stereo audio signals 有权

    公开(公告)号：US10659903B2

    公开(公告)日：2020-05-19

    申请号：US16409368

    申请日：2019-05-10

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Peter Grosche

    IPC: H04S7/00 ,  H04R3/04 ,  H04R5/02 ,  H04R5/04 ,  H04S3/00 ,  H04S1/00

    Abstract: A signal generator has a filter bank that provides weighted versions of audio signals to speakers. The weights were derived by identifying a first constraint that limits a weight that can be applied to an audio signal to be provided to a first speaker. A characteristic of a second speaker that affects how a user will perceive audio signals output by that speaker relative to audio signals output by the first speaker was also determined. A second constraint was determined based on the determined characteristic and the first constraint. The weights were then determined so as to minimize a difference between an actual balance of each signal that is expected to be heard by a user and a target balance. The signal generator can achieve sweet spot correction and sound stage widening simultaneously. It also achieves a balanced sound stage, particularly when the speakers are asymmetric.

    Audio Rendering System
    2.
    发明申请
    Audio Rendering System 有权
    音频渲染系统

    公开(公告)号：US20150264510A1

    公开(公告)日：2015-09-17

    申请号：US14725063

    申请日：2015-05-29

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Willem Bastiaan Kleijn ,  David Virette

    IPC: H04S7/00

    CPC classification number: H04S7/307 ,  H04S7/30 ,  H04S2400/11

    Abstract: An audio rendering system is provided that comprises a plurality of loudspeakers arranged to approximate a desired spatial sound field within a predetermined reproduction region, wherein the loudspeakers are configured to approximate the sound field based on a weighted series of orthonormal basis functions for the reproduction region.

    Abstract translation: 提供了一种音频再现系统，其包括布置成在预定再现区域内近似所需空间声场的多个扬声器，其中扬声器被配置为基于用于再现区域的加权的一系列正交基函数近似声场。

    Apparatus and method for processing soundfield data
    3.
    发明授权
    Apparatus and method for processing soundfield data 有权

    公开(公告)号：US10433093B2

    公开(公告)日：2019-10-01

    申请号：US16047098

    申请日：2018-07-27

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Panji Setiawan ,  Wenyu Jin

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

    Abstract: An apparatus for processing soundfield data is provided. The soundfield data defines a soundfield within a spatial reproduction region comprising at least one bright zone and at least one quiet zone. The apparatus comprises an applicator configured to apply a spatially continuously varying weighting function to the soundfield data in order to obtain weighted soundfield data defining a weighted soundfield, wherein the spatially continuously varying weighting function is configured to enhance the soundfield in at least one of the bright zone and the quiet zone.

    Method and Device for Generating an Elevated Sound Impression
    4.
    发明申请
    Method and Device for Generating an Elevated Sound Impression 有权

    公开(公告)号：US20180132054A1

    公开(公告)日：2018-05-10

    申请号：US15862807

    申请日：2018-01-05

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Simone Fontana

    IPC: H04S7/00 ,  H04R3/12 ,  H04S3/02 ,  H04S3/00

    Abstract: A sound field device is disclosed that comprises an elevation cue estimator, a low-frequency filter estimator, and a high-frequency filter estimator. The elevation cue-estimator is configured to estimate an elevation cue of a head-related transfer function (HRTF) of at least one listener. The low-frequency filter estimator is configured to estimate one or more low-frequency filter elements based on the elevation cue. The high-frequency filter estimator is configured to estimate one or more high-frequency filter elements based on the elevation cue. An estimation method of the low-frequency filter estimator is different from an estimation method of the high-frequency filter estimator. The one or more low-frequency filter elements and the one or more high-frequency filter elements are for driving an array of loudspeakers to generate an elevated sound impression at a bright zone.

    Method and device for generating an elevated sound impression
    5.
    发明授权
    Method and device for generating an elevated sound impression 有权

    公开(公告)号：US10419871B2

    公开(公告)日：2019-09-17

    申请号：US15862807

    申请日：2018-01-05

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Simone Fontana

    IPC: H04R3/12 ,  H04S3/02 ,  H04S3/00 ,  H04S7/00

    Abstract: A sound field device is disclosed that comprises an elevation cue estimator, a low-frequency filter estimator, and a high-frequency filter estimator. The elevation cue-estimator is configured to estimate an elevation cue of a head-related transfer function (HRTF) of at least one listener. The low-frequency filter estimator is configured to estimate one or more low-frequency filter elements based on the elevation cue. The high-frequency filter estimator is configured to estimate one or more high-frequency filter elements based on the elevation cue. An estimation method of the low-frequency filter estimator is different from an estimation method of the high-frequency filter estimator. The one or more low-frequency filter elements and the one or more high-frequency filter elements are for driving an array of loudspeakers to generate an elevated sound impression at a bright zone.

    Adaptive reverberation cancellation system
    6.
    发明授权
    Adaptive reverberation cancellation system 有权

    公开(公告)号：US10199032B2

    公开(公告)日：2019-02-05

    申请号：US15952864

    申请日：2018-04-13

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Peter Grosche

    IPC: G10K11/178 ,  G10L21/0232 ,  G10L21/0208

    Abstract: A signal processor for determining a plurality of drive signals for driving a plurality of loudspeakers to cancel a reverberation effect in a listening area, wherein the signal processor is configured to determine from one or more measured audio signals a plurality of measured physical coefficients in a basis of physical sound functions, such that a sum of the physical sound functions, weighted with the plurality of measured physical coefficients approximates the one or more measured audio signals, wherein at least half of the plurality of measured physical coefficients are zero, determine a residual error between the plurality of measured physical coefficients and a plurality of desired physical coefficients, estimate a transfer function describing a transformation from the plurality of desired physical coefficients to the plurality of measured physical coefficients, based on the determined residual error, and update the plurality of drive signals based on the estimated transfer function.

    Device and method for estimating direction of arrival of sound from a plurality of sound sources
    7.
    发明授权
    Device and method for estimating direction of arrival of sound from a plurality of sound sources 有权

    公开(公告)号：US11467244B2

    公开(公告)日：2022-10-11

    申请号：US16858208

    申请日：2020-04-24

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Kainan Chen ,  Wenyu Jin

    IPC: G01S3/80 ,  G01S3/808

    Abstract: A device estimates direction of arrival (DOA) of sound from sound sources received by P microphones, wherein P≥>1. The device is configured to transform the output signals of the microphones into the frequency domain and compute a covariance matrix for each of N frequency bins in a range of frequencies of the sound. Further, the device is configured to calculate an adapted covariance matrix from each of the covariance matrices for wide-band merging, calculate an accumulated covariance matrix from the N adapted covariance matrices, and estimate the DOA for each of the sound sources based on the accumulated covariance matrix. In order to calculate an adapted covariance matrix from a covariance matrix, the device is configured to spectrally decompose the covariance matrix and obtain a plurality of eigenvectors, rotate each obtained eigenvector, and construct each rotated eigenvector back to the shape of the covariance matrix.

    Adaptive Reverberation Cancellation System
    8.
    发明申请
    Adaptive Reverberation Cancellation System 审中-公开

    公开(公告)号：US20180233123A1

    公开(公告)日：2018-08-16

    申请号：US15952864

    申请日：2018-04-13

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Wenyu Jin ,  Peter Grosche

    IPC: G10K11/178 ,  G10L21/0232

    CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/12 ,  G10K2210/3028 ,  G10L21/0232 ,  G10L2021/02082 ,  H04R3/02 ,  H04S7/301 ,  H04S7/305

    Abstract: A signal processor for determining a plurality of drive signals for driving a plurality of loudspeakers to cancel a reverberation effect in a listening area, wherein the signal processor is configured to determine from one or more measured audio signals a plurality of measured physical coefficients in a basis of physical sound functions, such that a sum of the physical sound functions, weighted with the plurality of measured physical coefficients approximates the one or more measured audio signals, wherein at least half of the plurality of measured physical coefficients are zero, determine a residual error between the plurality of measured physical coefficients and a plurality of desired physical coefficients, estimate a transfer function describing a transformation from the plurality of desired physical coefficients to the plurality of measured physical coefficients, based on the determined residual error, and update the plurality of drive signals based on the estimated transfer function.

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