公开(公告)号：US20220084531A1

公开(公告)日：2022-03-17

申请号：US17536932

申请日：2021-11-29

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/008 ,  H04S3/00

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：US11164591B2

公开(公告)日：2021-11-02

申请号：US16645677

申请日：2018-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weixiang Hu ,  Lei Miao

IPC: G10L21/0216 ,  G10L19/008 ,  G10L21/0232

Abstract: A speech enhancement method includes determining a first spectral subtraction parameter based on a power spectrum of a speech signal containing noise and a power spectrum of a noise signal, determining a second spectral subtraction parameter based on the first spectral subtraction parameter and a reference power spectrum, and performing, based on the power spectrum of the noise signal and the second spectral subtraction parameter, spectral subtraction on the speech signal containing noise, where the reference power spectrum includes a predicted user speech power spectrum and/or predicted environmental noise power. Regularity of a power spectrum feature of a user speech of a terminal device and/or regularity of a power spectrum feature of noise in an environment in which a user is located are considered.

公开(公告)号：US11133014B2

公开(公告)日：2021-09-28

申请号：US16272397

申请日：2019-02-11

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/008 ,  G10L19/022 ,  G10L19/032 ,  G10L25/03 ,  H04S3/00

Abstract: A multi-channel signal encoding method and an encoder, where the 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. Hence, the method and the encoder ensure better accuracy of inter-channel information of a multi-channel signal.

公开(公告)号：US11081121B2

公开(公告)日：2021-08-03

申请号：US16725678

申请日：2019-12-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

IPC: G10L19/00 ,  G10L19/02 ,  G10L19/002

Abstract: A signal processing method and device includes obtaining spectral coefficients of a current frame of an audio signal, in which N sub-bands of the current frame comprises at least one of the spectral coefficients. A total energy of M successive sub-bands of the N sub-bands, a total energy of K successive sub-bands of the N sub-bands, and an energy of a first sub-band are obtained to determine whether to modify original envelope values of the M sub-bands. When the original envelope values of the M sub-bands are modified, encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands.

公开(公告)号：US20200294513A1

公开(公告)日：2020-09-17

申请号：US16887878

申请日：2020-05-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haiting Li ,  Bin Wang ,  Lei Miao

IPC: G10L19/008 ,  H04S1/00

Abstract: An audio encoding and decoding method includes obtaining a channel combination scheme for a current frame, obtaining an encoding mode of the current frame based on a downmix mode of a previous frame and the channel combination scheme for the current frame, performing time-domain downmix processing on left and right channel signals of the current frame based on the encoding mode of the current frame to obtain primary and secondary channel signals of the current frame, and encoding the primary and secondary channel signals of the current frame.

公开(公告)号：US20200279573A1

公开(公告)日：2020-09-03

申请号：US16645677

申请日：2018-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Weixiang Hu ,  Lei Miao

IPC: G10L21/0216

Abstract: A speech enhancement method includes determining a first spectral subtraction parameter based on a power spectrum of a speech signal containing noise and a power spectrum of a noise signal, determining a second spectral subtraction parameter based on the first spectral subtraction parameter and a reference power spectrum, and performing, based on the power spectrum of the noise signal and the second spectral subtraction parameter, spectral subtraction on the speech signal containing noise, where the reference power spectrum includes a predicted user speech power spectrum and/or predicted environmental noise power. Regularity of a power spectrum feature of a user speech of a terminal device and/or regularity of a power spectrum feature of noise in an environment in which a user is located are considered.

公开(公告)号：US10714102B2

公开(公告)日：2020-07-14

申请号：US16458697

申请日：2019-07-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Haiting Li ,  Lei Miao

IPC: G10L19/008 ,  G10L19/032

Abstract: In a stereo encoding method and a stereo encoder, a channel combination encoding solution of a current frame is first determined, and then a quantized channel combination ratio factor of the current frame and an encoding index of the quantized channel combination ratio factor are obtained based on the determined channel combination encoding solution, so that an obtained primary channel signal and secondary channel signal of the current frame meet a characteristic of the current frame.

公开(公告)号：US10657977B2

公开(公告)日：2020-05-19

申请号：US15985281

申请日：2018-05-21

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/00 ,  G10L19/028 ,  G10L19/26 ,  G10L21/02 ,  G10L19/16 ,  G10L21/0316 ,  G10L21/038

Abstract: Method and apparatus are provided for reconstructing a noise component of a speech/audio signal. A bitstream, is received and decoded to obtain a speech/audio signal. A first speech/audio signal is determined according to the speech/audio signal. A symbol of each sample value in the first speech/audio signal and an amplitude value of each sample value in the first speech/audio signal is determined. An adaptive normalization length and an adjusted amplitude value of each sample value are determined according to the adaptive normalization length and the amplitude value of each sample value. A second speech/audio signal is determined according to the symbol of each sample value and the adjusted amplitude value of each sample value.

公开(公告)号：US10460741B2

公开(公告)日：2019-10-29

申请号：US15699694

申请日：2017-09-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L19/00 ,  G10L15/00 ,  G10L19/12 ,  G10L19/06 ,  G10L19/025

Abstract: An audio coding method and apparatus, where the method includes, for each audio frame in audio, when a signal characteristic of the audio frame and a signal characteristic of a previous audio frame meet a preset modification condition, determining a first modification weight according to linear spectral frequency (LSF) differences of the audio frame and the LSF differences of the previous audio frame, modifying a linear predictive parameter of the audio frame according to the determined first modification weight, and coding the audio frame according to a modified linear predictive parameter of the audio frame. According to the present disclosure, audio having a wider bandwidth can be coded while a bit rate remains unchanged or a bit rate slightly changes and a spectrum between audio frames is steadier.

公开(公告)号：US20190267015A1

公开(公告)日：2019-08-29

申请号：US16409290

申请日：2019-05-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

IPC: G10L19/02 ,  G10L19/002

Abstract: A signal processing method and device includes obtaining spectral coefficients of a current frame of an audio signal, in which N sub-bands of the current frame comprises at least one of the spectral coefficients. A total energy of M successive sub-bands of the N sub-bands, a total energy of K successive sub-bands of the N sub-bands, and an energy of a first sub-band are obtained to determine whether to modify original envelope values of the M sub-bands. When the original envelope values of the M sub-bands are modified, encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands.