公开(公告)号：US10607620B2

公开(公告)日：2020-03-31

申请号：US16417195

申请日：2019-05-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L21/00 ,  G10L19/00 ,  G10L21/04 ,  G10L19/12 ,  G10L19/06 ,  G10L19/08 ,  G10L21/038 ,  G10L19/24 ,  G10L19/02

Abstract: A decoder for processing an audio signal receives an audio bitstream, decodes the bitstream to obtain a set of spectral frequency parameters that are arranged in an order of frequencies, determines a minimum spectral frequency parameter difference from a plurality of calculated spectral frequency parameter differences, determines a start frequency bin for predicting a high band excitation signal according to the minimum spectral frequency parameter difference, generates the high band excitation signal by selecting a frequency band with a preset bandwidth selected from a low band excitation signal according to the start frequency bin, and synthesizes a wideband signal based on the generated high band excitation signal.

公开(公告)号：US10546591B2

公开(公告)日：2020-01-28

申请号：US16409290

申请日：2019-05-10

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：US10347264B2

公开(公告)日：2019-07-09

申请号：US16205246

申请日：2018-11-30

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

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

Abstract: Present disclosure provides a signal processing method and device. Spectral coefficients of a current frame of a frequency-domain audio signal are divided into N sub-bands. N is a positive integer greater than 1. According to an energy attribute and a spectral attribute of a first subset of the N sub-bands, whether to modify original envelope values of sub-bands in the first subset is determined. A frequency range of each of the M sub-bands in the first subset is lower than a frequency range of each of the K sub-bands. Based on a determination that the original envelope values of the M sub-bands need to be modified, the original envelope values of the M sub-bands are modified individually to obtain modified envelope values of the M sub-bands. Encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands and original envelope values of the K sub-bands.

公开(公告)号：US10339945B2

公开(公告)日：2019-07-02

申请号：US15696591

申请日：2017-09-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/00 ,  G10L19/12 ,  G10L19/02 ,  G10L19/26

Abstract: Embodiments of the present application provide a coding/decoding method, apparatus, and system. According to the coding method, de-emphasis processing is performed on a full band signal by using a de-emphasis parameter determined according to a characteristic factor of an input audio signal, and then the full band signal is coded and sent to a decoder, so that the decoder performs corresponding de-emphasis decoding processing on the full band signal according to the characteristic factor of the input audio signal and restores the input audio signal. This resolves a prior-art problem that an audio signal restored by a decoder is apt to have signal distortion, and implements adaptive de-emphasis processing on the full band signal according to the characteristic factor of the audio signal to enhance coding performance, so that the input audio signal restored by the decoder has relatively high fidelity and is closer to an original signal.

公开(公告)号：US20190172474A1

公开(公告)日：2019-06-06

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: G10L19/032 ,  G10L19/022 ,  G10L19/008

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：US20190156839A1

公开(公告)日：2019-05-23

申请号：US16256421

申请日：2019-01-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

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

Abstract: A method and device for decoding a signal, where the method for decoding the signal includes obtaining spectral coefficients of sub-bands from a received bitstream by decoding, classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation, performing noise filling on a spectral coefficient that has not been obtained by decoding and is in the sub-band with unsaturated bit allocation to restore the spectral coefficient that has not been obtained by decoding, and obtaining a frequency domain signal according to the spectral coefficients obtained by decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.

公开(公告)号：US20190108848A1

公开(公告)日：2019-04-11

申请号：US16205246

申请日：2018-11-30

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

IPC: G10L19/02 ,  G10L19/002

CPC classification number: G10L19/0204 ,  G10L19/002 ,  G10L19/02

Abstract: Present disclosure provides a signal processing method and device. Spectral coefficients of a current frame of a frequency-domain audio signal are divided into N sub-bands. N is a positive integer greater than 1. According to an energy attribute and a spectral attribute of a first subset of the N sub-bands, whether to modify original envelope values of sub-bands in the first subset is determined. A frequency range of each of the M sub-bands in the first subset is lower than a frequency range of each of the K sub-bands. Based on a determination that the original envelope values of the M sub-bands need to be modified, the original envelope values of the M sub-bands are modified individually to obtain modified envelope values of the M sub-bands. Encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands and original envelope values of the K sub-bands.

公开(公告)号：US10236002B2

公开(公告)日：2019-03-19

申请号：US15787563

申请日：2017-10-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

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

Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.

公开(公告)号：US20190035408A1

公开(公告)日：2019-01-31

申请号：US16145469

申请日：2018-09-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

IPC: G10L19/005 ,  G10L21/0388 ,  G10L19/02 ,  G10L21/0232

Abstract: Embodiments of the present disclosure provide a decoding method and a decoding apparatus. The decoding method includes: in a case in which it is determined that a current frame is a lost frame, synthesizing a high frequency band signal; determining subframe gains of multiple subframes of the current frame; determining a global gain of the current frame; and adjusting, according to the global gain and the subframe gains of the multiple subframes, the synthesized high frequency band signal to obtain a high frequency band signal of the current frame. A subframe gain of the current frame is obtained according to a gradient between subframe gains of subframes previous to the current frame, so that transition before and after frame loss is more continuous, thereby reducing noise during signal reconstruction, and improving speech quality.

公开(公告)号：US10089995B2

公开(公告)日：2018-10-02

申请号：US15854130

申请日：2017-12-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fuwei Ma ,  Dejun Zhang ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/038 ,  G10L19/107 ,  G10L19/04 ,  G10L19/12 ,  G01L19/12

Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.