公开(公告)号：US20130346088A1

公开(公告)日：2013-12-26

申请号：US14010103

申请日：2013-08-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Miao ,  Zexin Liu ,  Fengyan Qi

IPC: G10L19/00

CPC classification number: G10L19/00 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/18

Abstract: An audio coding method and apparatus are disclosed, where the method includes: dividing an input audio signal into a low-band signal and a high-band signal; identifying types of the low-band signal and the high-band signal; adaptively allocating a total input rate of the audio signal to the low-band signal and the high-band signal according to different coding modes corresponding to the low-band signal and the high-band signal; and coding the low-band signal through a coding mode corresponding to the low-band signal according to the low-band rate, and coding the high-band signal through a coding mode corresponding to the high-band signal according to the high-band rate. In embodiments of the present application, when the low-band signal and the high-band signal are coded, coding rates are adaptively adjusted according to different types of the signals, thereby improving overall audio coding performance.

Abstract translation: 公开了一种音频编码方法和装置，其中该方法包括：将输入音频信号分成低频带信号和高频带信号; 识别低频带信号和高频带信号的类型; 根据对应于低频带信号和高频带信号的不同编码模式，将音频信号的总输入速率自适应地分配给低频带信号和高频带信号; 并根据低频率通过与低频带信号对应的编码模式对低频带信号进行编码，并根据高频带对与高频带信号对应的编码模式对高频带信号进行编码 率。 在本申请的实施例中，当对低频带信号和高频带信号进行编码时，根据不同类型的信号自适应地调整编码速率，从而提高整体音频编码性能。

公开(公告)号：US08600765B2

公开(公告)日：2013-12-03

申请号：US13728201

申请日：2012-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/00 ,  G10L19/02 ,  G10L15/00 ,  G10L19/14 ,  G10L11/04

CPC classification number: G10L19/265 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  G10L21/0388

Abstract: Embodiments of the present invention provide a signal classification method and device, and encoding and decoding methods and devices. The encoding method includes: dividing a current frame into a low-frequency band signal and a high-frequency band signal; attenuating the high-frequency band signal or a to-be-encoded characteristic parameter of the high-frequency band signal according to an energy attenuation value of the low-frequency band signal, where the energy attenuation value indicates energy attenuation of the low-frequency band signal caused by encoding of the low-frequency band signal; and encoding the attenuated high-frequency band signal or the attenuated to-be-encoded characteristic parameter of the high-frequency band signal. The technical solutions according to the embodiments of the present invention can improve the effect of combining the low-frequency band signal and the high-frequency band signal at the decoder.

Abstract translation: 本发明的实施例提供信号分类方法和装置，以及编码和解码方法和装置。 该编码方法包括：将当前帧划分成低频带信号和高频带信号; 根据低频带信号的能量衰减值对高频带信号的高频带信号或待编码的特征参数进行衰减，其中能量衰减值表示低频带信号的能量衰减 由低频带信号的编码引起的频带信号; 对衰减的高频带信号或衰减的待编码的高频信号的特征参数进行编码。 根据本发明的实施例的技术方案可以改善在解码器处组合低频带信号和高频带信号的效果。

公开(公告)号：US20130279702A1

公开(公告)日：2013-10-24

申请号：US13852554

申请日：2013-03-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yue Lang ,  David Virette ,  Lei Miao ,  Wenhai Wu

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L21/0364

Abstract: According to the invention, a device for post-processing at least one channel signal of a plurality of channel signals of a multi-channel signal is described, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising: a receiver for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal, an interchannel time difference between the channel signal and the downmix signal, and a classification indication indicating a transient type of the downmix signal; and a post-processor for post-processing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication and the interchannel time difference.

Abstract translation: 根据本发明，描述了一种用于后处理多信道信号的多个信道信号的至少一个信道信号的装置，所述至少一个信道信号是通过低比特率信号从解码的下混信号产生的， 所述装置包括：接收器，用于接收从解码的下混合信号产生的至少一个信道信号，解码的下混合信号的时间包络，信道信号和下混合信号之间的信道间时间差， 以及指示下混合信号的瞬时类型的分类指示; 以及后处理器，用于基于由各个加权因子加权的解码缩混信号的时间包，并且根据分类指示和通道间时间差，对至少一个信道信号进行后处理。

公开(公告)号：US20130226595A1

公开(公告)日：2013-08-29

申请号：US13854043

申请日：2013-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/032

CPC classification number: G10L19/032 ,  G10L19/025 ,  G10L19/20 ,  G10L21/038 ,  G10L25/18 ,  H04N19/60

Abstract: A method and a device for encoding a high frequency signal, and a method and a device for decoding a high frequency signal are provided, which relate to encoding and decoding technology. The method for encoding a high frequency signal includes: determining a signal type of a high frequency signal of a current frame; smoothing and scaling time envelopes of the high frequency signal of the current frame and obtaining time envelopes of the high frequency signal of the current frame that require to be encoded, if the high frequency signal of the current frame is a non-transient signal and a high frequency signal of the previous frame is a transient signal; and quantizing and encoding the time envelopes of the high frequency signal of the current frame that require to be encoded, and frequency information and signal type information of the high frequency signal of the current frame.

Abstract translation: 提供了一种编码高频信号的方法和装置，以及用于解码高频信号的方法和装置，其涉及编码和解码技术。 编码高频信号的方法包括：确定当前帧的高频信号的信号类型; 平滑和缩放当前帧的高频信号的时间包络并获得当前帧的高频信号需要被编码的时间包络，如果当前帧的高频信号是非瞬态信号，并且 前一帧的高频信号是瞬态信号; 对需要编码的当前帧的高频信号的时间包进行量化和编码，以及当前帧的高频信号的频率信息和信号类型信息。

公开(公告)号：US20130094655A1

公开(公告)日：2013-04-18

申请号：US13708611

申请日：2012-12-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Lei Miao ,  Chen Hu ,  Wenhai Wu ,  Yue Lang

IPC: G10L19/008

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

Abstract: Embodiments of the present invention provide a method and an apparatus for generating a sideband residual signal. The method includes: comparing energy of a first signal input by a first sound channel with energy of a second signal input by a second sound channel; if the energy of the first signal is greater than the energy of the second signal, generating a sideband residual signal by allocating a monophonic quantization error to the first signal; and if the energy of the first signal is smaller than the energy of the second signal, generating a sideband residual signal by allocating a monophonic quantization error to the second signal. By using the method and apparatus provided in the embodiments of the present invention, it can be avoided that a monophonic quantization error has a greater impact on a signal whose energy is smaller.

Abstract translation: 本发明的实施例提供一种用于生成边带残留信号的方法和装置。 该方法包括：将通过第一声道输入的第一信号的能量与由第二声道输入的第二信号的能量进行比较; 如果第一信号的能量大于第二信号的能量，则通过向第一信号分配单声道量化误差来产生边带残差信号; 并且如果第一信号的能量小于第二信号的能量，则通过向第二信号分配单声道量化误差来产生边带残留信号。 通过使用本发明实施例中提供的方法和装置，可以避免单声道量化误差对能量较小的信号的影响较大。

公开(公告)号：US12154578B2

公开(公告)日：2024-11-26

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

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：US12100401B2

公开(公告)日：2024-09-24

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 ,  G10L19/005 ,  G10L19/02 ,  G10L19/028

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

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：US12087312B2

公开(公告)日：2024-09-10

申请号：US18461641

申请日：2023-09-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Haiting Li ,  Lei Miao

IPC: G10L19/008 ,  G10L19/032

CPC classification number: G10L19/008 ,  G10L19/032

Abstract: In a stereo encoding method, a channel combination encoding solution of a current frame is first obtained, 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 obtained 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：US11950079B2

公开(公告)日：2024-04-02

申请号：US17689328

申请日：2022-03-08

Applicant: Huawei Technologies Co., Ltd.

Inventor： Eyal Shlomot ,  Haiting Li ,  Lei Miao

IPC: G06F17/00 ,  H04S1/00 ,  H04S5/00

CPC classification number: H04S1/007 ,  H04S5/00 ,  H04S2400/03 ,  H04S2400/05

Abstract: A delay estimation method includes determining a cross-correlation coefficient of a multi-channel signal of a current frame, determining a delay track estimation value of the current frame based on buffered inter-channel time difference information of at least one past frame, determining an adaptive window function of the current frame, performing weighting on the cross-correlation coefficient based on the delay track estimation value of the current frame and the adaptive window function of the current frame, to obtain a weighted cross-correlation coefficient, and determining an inter-channel time difference of the current frame based on the weighted cross-correlation coefficient.

公开(公告)号：US11935548B2

公开(公告)日：2024-03-19

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 ,  G10L19/032 ,  G10L25/03 ,  H04S3/00

CPC classification number: G10L19/008 ,  G10L19/022 ,  G10L19/032 ,  G10L25/03 ,  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.