公开(公告)号：US20240274136A1

公开(公告)日：2024-08-15

申请号：US18430694

申请日：2024-02-02

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Eyal Shlomot ,  Haiting Li ,  Zexin Liu

IPC: G10L19/008 ,  G10L19/032

CPC classification number: G10L19/008 ,  G10L19/032

Abstract: Various embodiments provide a method and an apparatus for determining a weighting factor during stereo signal encoding. In those embodiments, a parameter value corresponding to the encoding mode of the to-be-encoded signal is determining based on an encoding mode of a to-be-encoded signal in a stereo signal and a correspondence between an encoding mode and a parameter value. Based on the determined parameter value and an energy spectrum of a linear prediction filter corresponding to an original line spectral frequency parameter of the to-be-encoded signal is a weighting factor for calculating a distance between the original line spectral frequency parameter and a target original line spectral frequency parameter is calculated.

公开(公告)号：US20240177722A1

公开(公告)日：2024-05-30

申请号：US18524654

申请日：2023-11-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/03 ,  G10L19/00 ,  G10L19/02 ,  G10L19/12 ,  G10L19/26 ,  G10L21/038

CPC classification number: G10L19/03 ,  G10L19/12 ,  G10L19/26 ,  G10L19/265 ,  G10L21/038 ,  G10L2019/0016 ,  G10L19/0204

Abstract: An encoding method includes dividing a to-be-encoded time-domain signal into a low band signal and a high band signal, performing encoding on the low band signal to obtain a low frequency encoding parameter, performing encoding on the high band signal to obtain a high frequency encoding parameter, obtaining a synthesized high band signal, performing short-time post-filtering processing on the synthesized high band signal to obtain a short-time filtering signal, and calculating a high frequency gain based on the high band signal and the short-time filtering signal.

公开(公告)号：US20240046938A1

公开(公告)日：2024-02-08

申请号：US18489875

申请日：2023-10-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

IPC: G10L19/002 ,  G10L19/028 ,  G10L19/02 ,  G10L19/005

CPC classification number: G10L19/002 ,  G10L19/028 ,  G10L19/0204 ,  G10L19/005

Abstract: In a method to decode signals, a computing device decodes spectral coefficients of a current frame are grouped into a plurality of sub-bands. The computing device classifies a sub-band as a bit allocation unsaturated sub-band based on an average quantity of allocated bits per spectral coefficient of a sub-band of the plurality of sub-bands and a threshold. The computing device obtains a noise filling gain based on an envelope of the sub-band, and obtains a reconstructed spectral coefficient of the sub-band by performing noise filling based on the noise filling gain. The computing device then obtains a frequency domain audio signal based on spectral coefficients in the sub-band obtained by decoding and the reconstructed spectral coefficient.

公开(公告)号：US11756557B2

公开(公告)日：2023-09-12

申请号：US17536932

申请日：2021-11-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Halting Li ,  Zexin Liu ,  Xingtao Zhang ,  Lei Miao

IPC: G10L19/008 ,  H04S3/00

CPC classification number: G10L19/008 ,  H04S3/00 ,  H04S2420/03

Abstract: A method for encoding an audio signal includes obtaining an ITD value of a current frame of an audio signal; obtaining a characteristic parameter of the current frame, wherein the characteristic parameter comprises at least one of a signal-to-noise ratio of the current frame or a peak feature of cross correlation coefficients of the current frame; determining, based on the characteristic parameter, whether to use the initial ITD value as the finalized ITD value of the current frame; and encoding the current frame based on the finalized ITD value of the current frame, wherein if the initial ITD value is determined as not used as the finalized ITD value of the current frame, the finalized ITD value of the current frame is the same as a finalized ITD value of a previous frame of the current frame.

公开(公告)号：US20220366922A1

公开(公告)日：2022-11-17

申请号：US17868879

申请日：2022-07-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/03 ,  G10L19/26 ,  G10L21/038 ,  G10L19/12

Abstract: An encoding method includes dividing a to-be-encoded time-domain signal into a low band signal and a high band signal, performing encoding on the low band signal to obtain a low frequency encoding parameter, performing encoding on the high band signal to obtain a high frequency encoding parameter, obtaining a synthesized high band signal, performing short-time post-filtering processing on the synthesized high band signal to obtain a short-time filtering signal, and calculating a high frequency gain based on the high band signal and the short-time filtering signal.

公开(公告)号：US20220328053A1

公开(公告)日：2022-10-13

申请号：US17842284

申请日：2022-06-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xingtao Zhang ,  Haiting Li ,  Zexin Liu ,  Lei Miao

IPC: G10L19/008

Abstract: An inter-channel phase difference (IPD) parameter extraction method includes obtaining a parameter for obtaining an information extraction manner for a current frame of a multi-channel signal; obtaining an IPD parameter extraction manner for the current frame based on the parameter for obtaining the information extraction manner, where the obtained IPD parameter extraction manner is one of at least two preset IPD parameter extraction manners; and obtaining an IPD parameter of the current frame based on the obtained IPD parameter extraction manner for the current frame.

公开(公告)号：US11451921B2

公开(公告)日：2022-09-20

申请号：US17179619

申请日：2021-02-19

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Gavin Kearney ,  Cal Armstrong ,  Bin Wang ,  Zexin Liu

IPC: H04S7/00 ,  H04R5/04 ,  H04S3/00

Abstract: An audio processing method includes: M audio signals are obtained by processing an audio signal by M virtual speakers; M first HRTFs and M second HRTFs are obtained, where the M first HRTFs corresponding to a left ear position, and the M second HRTFs corresponding to a right ear position; high-band impulse responses of some of the M first HRTFs are modified to obtain modified first target HRTFs, and high-band impulse responses of some of the M second HRTFs are modified to obtain modified second target HRTFs; a first target audio signal corresponding to the left ear position is obtained based on the modified first target HRTFs and un-modified first HRTFs, and the M audio signals; and a second target audio signal corresponding to the right ear position is obtained based on the modified second HRTFs, un-modified second target HRTFs, and the M audio signals.

公开(公告)号：US20210383815A1

公开(公告)日：2021-12-09

申请号：US17408116

申请日：2021-08-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Xingtao Zhang ,  Haiting Li ,  Lei Miao

IPC: G10L19/008 ,  G10L19/022

Abstract: A multi-channel signal encoding method includes obtaining a multi-channel signal of a current frame; determining an initial multi-channel parameter of the current frame; determining a difference parameter based on the initial multi-channel parameter of the current frame and multi-channel parameters of previous K frames of the current frame, where the difference parameter represents a difference between the initial multi-channel parameter of the current frame and the multi-channel parameters of the previous K frames, and K is an integer greater than or equal to one; determining a multi-channel parameter of the current frame based on the difference parameter and a characteristic parameter of the current frame; and encoding the multi-channel signal based on the multi-channel parameter of the current frame.

公开(公告)号：US11133016B2

公开(公告)日：2021-09-28

申请号：US16588064

申请日：2019-09-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L19/032 ,  G10L19/12 ,  G10L19/06 ,  G10L19/025

Abstract: A method comprises determining a first modification weight according to linear spectral frequency (LSF) differences of the current frame and LSF differences of a previous frame of the current frame, when a signal characteristic of the current frame meets a preset modification condition, modifying the linear predictive parameter of the current frame according to the determined first modification weight, and coding the current frame according to the modified linear predictive parameter.

公开(公告)号：US20210176584A1

公开(公告)日：2021-06-10

申请号：US17179723

申请日：2021-02-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Cal Armstrong ,  Gavin Kearney ,  Bin Wang ,  Zexin Liu

IPC: H04S7/00

Abstract: An audio processing method includes: M first audio signals are obtained by processing a to-be-processed audio signal by M first virtual speakers; N second audio signals are obtained by processing the to-be-processed audio signal by N second virtual speakers; M first head-related transfer functions (HRTFs) centered at a left ear position and N second HRTFs centered at a right ear position are obtained; a first target audio signal is obtained based on the M first audio signals and the M first HRTFs; and a second target audio signal is obtained based on the N second audio signals and the N second HRTFs.