公开(公告)号：US20160210979A1

公开(公告)日：2016-07-21

申请号：US15080950

申请日：2016-03-25

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/12 ,  G10L19/06 ,  G10L19/02

CPC classification number: G10L19/12 ,  G10L19/0208 ,  G10L19/06 ,  G10L19/08 ,  G10L19/24 ,  G10L21/038 ,  G10L2019/0016

Abstract: A method and an apparatus for predicting a high band excitation signal are disclosed. The method includes: acquiring, according to a received low band bitstream, a set of spectral frequency parameters that are arranged in an order of frequencies, calculating a spectral frequency parameter difference between every two spectral frequency parameters that have a same position interval; acquiring a minimum spectral frequency parameter difference from the calculated spectral frequency parameter differences; determining, according to a frequency bin that corresponds to the minimum spectral frequency parameter difference, a start frequency bin for predicting a high band excitation signal from a low band; and predicting the high band excitation signal from the low band according to the start frequency bin. By implementing embodiments of the present invention, a high band excitation signal can be better predicted, thereby improving performance of the high band excitation signal.

Abstract translation: 公开了一种用于预测高频带激励信号的方法和装置。 该方法包括：根据接收到的低频带比特流获取以频率顺序排列的一组频谱频率参数，计算具有相同位置间隔的每两个频谱频率参数之间的频谱频率参数差; 从所计算的频谱频率参数差获取最小频谱参数差; 根据对应于最小频谱频率参数差的频率仓确定用于从低频段预测高频带激励信号的起始频率仓; 并根据起始频率仓预测来自低频段的高频激励信号。 通过实现本发明的实施例，可以更好地预测高频带激励信号，从而提高高频带激励信号的性能。

公开(公告)号：US20150332688A1

公开(公告)日：2015-11-19

申请号：US14806896

申请日：2015-07-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/02

CPC classification number: G10L19/12 ,  G10L19/02 ,  G10L19/08 ,  G10L21/038

Abstract: A method for predicting a bandwidth extension frequency band signal includes demultiplexing a received bitstream to obtain a frequency domain signal; determining whether a highest frequency bin, to which a bit is allocated, of the frequency domain signal is less than a preset start frequency bin of a bandwidth extension frequency band; predicting an excitation signal of the bandwidth extension frequency band according to the determination; and predicting the bandwidth extension frequency band signal according to the predicted excitation signal of the bandwidth extension frequency band and a frequency envelope of the bandwidth extension frequency band.

Abstract translation: 一种用于预测带宽扩展频带信号的方法包括解复用接收的比特流以获得频域信号; 确定频域信号中哪一位被分配的最高频率仓是否小于带宽扩展频带的预设起始频率仓; 根据确定预测带宽扩展频带的激励信号; 以及根据带宽扩展频带的预测激励信号和带宽扩展频带的频率包络来预测带宽扩展频带信号。

公开(公告)号：US12154577B2

公开(公告)日：2024-11-26

申请号：US18361028

申请日：2023-07-28

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：US20240185867A1

公开(公告)日：2024-06-06

申请号：US18538381

申请日：2023-12-13

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: 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：US20240161756A1

公开(公告)日：2024-05-16

申请号：US18419794

申请日：2024-01-23

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/008 ,  G10L19/022

CPC classification number: G10L19/008 ,  G10L19/022 ,  H04S3/00

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：US20240135938A1

公开(公告)日：2024-04-25

申请号：US18393866

申请日：2023-12-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/008 ,  G10L19/02 ,  G10L19/032

CPC classification number: G10L19/008 ,  G10L19/0204 ,  G10L19/032

Abstract: A multi-channel signal encoding method includes determining a downmixed signal of a first channel signal and a second channel signal, determining an initial reverberation gain parameter of the first channel signal and the second channel signal, determining a target reverberation gain parameter of the first channel signal and the second channel signal based on a correlation between the first channel signal and the downmixed signal, a correlation between the second channel signal and the downmixed signal, and the initial reverberation gain parameter, quantizing the first channel signal and the second channel signal based on the downmixed signal and the target reverberation gain parameter, and writing a quantized first channel signal and a quantized second channel signal into a bitstream.

公开(公告)号：US11915709B2

公开(公告)日：2024-02-27

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 ,  G10L19/022 ,  G10L19/18 ,  G10L19/02 ,  G10L19/00 ,  G10L25/18

CPC classification number: 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：US20240056764A1

公开(公告)日：2024-02-15

申请号：US18493319

申请日：2023-10-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: H04S7/00 ,  G10K15/08 ,  G10L19/008 ,  G10L19/16 ,  G10L19/22

CPC classification number: H04S7/305 ,  G10K15/08 ,  G10L19/008 ,  G10L19/173 ,  G10L19/22

Abstract: A multi-channel signal encoding method includes determining a downmixed signal of a first channel signal and a second channel signal in a multi-channel signal, and reverberation gain parameters corresponding to different subbands of the first channel signal and the second channel signal, where the obtained reverberation gain parameters belong to at least two reverberation gain parameter groups. The method further includes selecting, from the at least two reverberation gain parameter groups, a target reverberation gain parameter group. The method further includes generating parameter indication information, where the parameter indication information indicates the target reverberation gain parameter group. The method further includes encoding reverberation gain parameters corresponding to the target reverberation gain parameter group, the parameter indication information, and the downmixed signal to obtain a bitstream.

公开(公告)号：US20240029746A1

公开(公告)日：2024-01-25

申请号：US18361028

申请日：2023-07-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haiting 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：US11881226B2

公开(公告)日：2024-01-23

申请号：US18157518

申请日：2023-01-20

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: 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.