公开(公告)号：US09514762B2

公开(公告)日：2016-12-06

申请号：US15011824

申请日：2016-02-01

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Lei Miao ,  Zexin Liu

IPC: G10L19/00 ,  G10L19/26 ,  G10L19/18 ,  G10L21/038 ,  G10L19/008 ,  G10L19/02 ,  G10L19/087 ,  G10L25/18

CPC classification number: G10L19/265 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/087 ,  G10L19/18 ,  G10L21/038 ,  G10L25/18

Abstract: The present invention relates to an audio signal coding method and apparatus. The method includes: categorizing audio signals into high-frequency audio signals and low-frequency audio signals; coding the low-frequency audio signals by using a corresponding low-frequency coding manner according to characteristics of low-frequency audio signals; and selecting a bandwidth extension mode to code the high-frequency audio signals according to the low-frequency coding manner and/or characteristics of the audio signals.

Abstract translation: 本发明涉及音频信号编码方法和装置。 该方法包括：将音频信号分类为高频音频信号和低频音频信号; 根据低频音频信号的特性，通过使用相应的低频编码方式对低频音频信号进行编码; 以及根据低频编码方式和/或音频信号的特性来选择带宽扩展模式来对高频音频信号进行编码。

公开(公告)号：US20160343382A1

公开(公告)日：2016-11-24

申请号：US15197364

申请日：2016-06-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Xingtao Zhang ,  Lei Miao

IPC: G10L19/16 ,  G10L19/06

CPC classification number: G10L19/167 ,  G10L19/005 ,  G10L19/06 ,  G10L25/93 ,  G10L2019/0002 ,  G10L2025/932

Abstract: A method and an apparatus for decoding a speech/audio bitstream are disclosed, where the method for decoding a speech/audio bitstream includes determining whether a current frame is a normal decoding frame or a redundancy decoding frame, obtaining a decoded parameter of the current frame by means of parsing when the current frame is a normal decoding frame or a redundancy decoding frame, performing post-processing on the decoded parameter of the current frame to obtain a post-processed decoded parameter of the current frame, and using the post-processed decoded parameter of the current frame to reconstruct a speech/audio signal.

Abstract translation: 公开了一种用于解码语音/音频比特流的方法和装置，其中用于解码语音/音频比特流的方法包括确定当前帧是正常解码帧还是冗余解码帧，获得当前帧的解码参数 通过当前帧是正常解码帧或冗余解码帧进行解析，对当前帧的解码参数执行后处理以获得当前帧的后处理解码参数，并且使用后处理 解码当前帧的参数以重构语音/音频信号。

公开(公告)号：US09361904B2

公开(公告)日：2016-06-07

申请号：US14806896

申请日：2015-07-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/00 ,  G10L21/038 ,  G10L19/02 ,  G10L19/08

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：US20160086613A1

公开(公告)日：2016-03-24

申请号：US14952902

申请日：2015-11-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/02 ,  G10L19/08 ,  G10L19/06 ,  G10L19/002

CPC classification number: G10L19/0204 ,  G10L19/002 ,  G10L19/06 ,  G10L19/08 ,  G10L19/107 ,  G10L19/24 ,  G10L21/038

Abstract: Embodiments of the present invention provide a signal decoding method and device. The method includes decoding a bit stream of a voice signal or an audio signal to acquire a decoded signal; predicting an excitation signal of an extension band according to the decoded signal, where the extension band is adjacent to a band of the decoded signal, and the band of the decoded signal is lower than the extension band; selecting a first band and a second band from the decoded signal, and predicting a spectral envelope of the extension band according to a spectral coefficient of the first band and a spectral coefficient of the second band; and determining a frequency-domain signal of the extension band according to the spectral envelope of the extension band and the excitation signal of the extension band.

Abstract translation: 本发明的实施例提供一种信号解码方法和装置。 该方法包括解码语音信号或音频信号的比特流以获得解码信号; 根据解码信号预测扩展频带的激励信号，其中扩展频带与解码信号的频带相邻，并且解码信号的频带低于扩展频带; 从解码信号中选择第一频带和第二频带，并根据第一频带的频谱系数和第二频带的频谱系数预测扩展频带的频谱包络; 以及根据扩展频带的频谱包络和扩展频带的激励信号来确定扩展频带的频域信号。

公开(公告)号：US09251798B2

公开(公告)日：2016-02-02

申请号：US14145632

申请日：2013-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Miao ,  Zexin Liu

IPC: G10L19/00 ,  G10L21/00 ,  G10L19/008 ,  G10L19/18 ,  G10L21/038 ,  G10L25/18

CPC classification number: G10L19/265 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/087 ,  G10L19/18 ,  G10L21/038 ,  G10L25/18

Abstract: Example embodiments described herein generally provide for adaptive audio signal coding of low-frequency and high-frequency audio signals. More specifically, audio signals are categorized into high-frequency audio signals and low-frequency audio signals. Then, based on a set coding and/or characteristics of the low-frequency audio signals, the low-frequency coding manner is selected. Similarly, but in addition to, a bandwidth extension mode to code the high-frequency audio signals is selected according to the low-frequency coding manner and/or characteristics of the audio signals.

Abstract translation: 本文描述的示例性实施例通常提供低频和高频音频信号的自适应音频信号编码。 更具体地，音频信号被分类为高频音频信号和低频音频信号。 然后，基于低频音频信号的集合编码和/或特性，选择低频编码方式。 类似地，除了根据低频编码方式和/或音频信号的特性来选择对高频音频信号进行编码的带宽扩展模式。

公开(公告)号：US20150235653A1

公开(公告)日：2015-08-20

申请号：US14704502

申请日：2015-05-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L21/0388 ,  G10L19/26 ,  G10L19/08

CPC classification number: G10L21/0388 ,  G10L19/0204 ,  G10L19/08 ,  G10L19/24 ,  G10L19/265 ,  G10L21/038 ,  G10L25/93

Abstract: An audio signal encoding and decoding method, an audio signal encoding and decoding apparatus, a transmitter, a receiver, and a communications system, which can improve encoding and/or decoding performance. The audio signal encoding method includes dividing a to-be-encoded time domain signal into a low band signal and a high band signal; encoding the low band signal to obtain a low frequency encoding parameter; calculating a voiced degree factor, and predicting a high band excitation signal; weighting the high band excitation signal and random noise using the voiced degree factor, so as to obtain a synthesized excitation signal; and obtaining a high frequency encoding parameter based on the synthesized excitation signal and the high band signal. Technical solutions in the embodiments of the present invention can improve an encoding or decoding effect.

Abstract translation: 音频信号编码和解码方法，音频信号编码和解码装置，发射机，接收机和通信系统，其可以改善编码和/或解码性能。 音频信号编码方法包括将待编码的时域信号划分成低频带信号和高频带信号; 编码低频信号以获得低频编码参数; 计算有声度因子，并预测高频激励信号; 使用有声度因子对高频带激励信号和随机噪声进行加权，以获得合成的激励信号; 以及基于合成的激励信号和高频带信号获得高频编码参数。 本发明实施例中的技术方案可以改善编码或解码效果。

公开(公告)号：US08924221B2

公开(公告)日：2014-12-30

申请号：US13854043

申请日：2013-03-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/20

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：US20140046672A1

公开(公告)日：2014-02-13

申请号：US14057924

申请日：2013-10-18

Applicant: Huawei Technologies Co., LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/26

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，根据能量来衰减高频带信号或待编码特征参数的高频带信号 低频带信号的衰减值，其中能量衰减值指示由低频带信号的编码引起的低频带信号的能量衰减，以及对衰减的高频带信号或衰减的 - 高频带信号的被编码特征参数。 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。