公开(公告)号：US10971162B2

公开(公告)日：2021-04-06

申请号：US16731689

申请日：2019-12-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

IPC: G10L19/002 ,  G10L19/028 ,  G10L19/02 ,  G10L19/005

Abstract: A method and device for decoding a signal, where the method includes: obtaining an average quantity of allocated bits per spectral coefficient of a sub-band of a current frame of the audio signal, wherein the sub-band includes a plurality of spectral coefficients; obtaining a noise filling gain for the sub-band when the average quantity of allocated bits per spectral coefficient is less than a classification threshold; reconstructing, according to the noise filling gain, at least some of the spectral coefficients to generate reconstructed spectral coefficients when the average quantity of allocated bits per spectral coefficient is less than a classification threshold; obtaining a frequency domain signal according to the reconstructed spectral coefficients; and generating a time domain signal based on the frequency domain signal. 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：US10388295B2

公开(公告)日：2019-08-20

申请号：US15848486

申请日：2017-12-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/12 ,  G10L19/02 ,  G10L21/038 ,  G10L19/08

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.

公开(公告)号：US20190180766A1

公开(公告)日：2019-06-13

申请号：US16277739

申请日：2019-02-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao

IPC: G10L21/013 ,  G10L25/90 ,  G10L25/00 ,  G10L19/00 ,  G10L21/028

Abstract: A method and an apparatus for detecting correctness of a pitch period, where the method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal, determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal, and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. Hence, the method and apparatus for detecting correctness of the pitch period improve, based on a relatively less complex algorithm, accuracy of detecting correctness of the pitch period.

公开(公告)号：US20180040326A1

公开(公告)日：2018-02-08

申请号：US15787563

申请日：2017-10-18

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

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

CPC classification number: G10L19/002 ,  G10L19/0204 ,  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：US09830914B2

公开(公告)日：2017-11-28

申请号：US15451866

申请日：2017-03-07

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

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

CPC classification number: G10L19/002 ,  G10L19/0204 ,  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：US09633666B2

公开(公告)日：2017-04-25

申请号：US14543320

申请日：2014-11-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao

IPC: G10L19/00 ,  G10L21/00 ,  G10L25/00 ,  G10L21/013 ,  G10L21/028 ,  G10L25/90

CPC classification number: G10L21/013 ,  G10L19/00 ,  G10L21/028 ,  G10L25/00 ,  G10L25/90

Abstract: A method and an apparatus for detecting correctness of a pitch period. The method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal; determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal; and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. The method and apparatus for detecting correctness of a pitch period according to the embodiments of the present invention can improve, based on a relatively less complex algorithm, accuracy of detecting correctness of a pitch period.

公开(公告)号：US20150287420A1

公开(公告)日：2015-10-08

申请号：US14744452

申请日：2015-06-19

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Yang Gao ,  Fengyan Qi

IPC: G10L21/003 ,  G10L19/00

CPC classification number: G10L21/003 ,  G10L19/00 ,  G10L19/09 ,  G10L25/06 ,  G10L25/21 ,  G10L25/90

Abstract: System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.

Abstract translation: 提供了用于语音或音频信号的非常短的音调检测和编码的系统和方法实施例。 该系统和方法包括使用时域和频域音调检测技术的组合来检测语音或音频信号中是否存在比常规最小音调限制短的音调滞后。 音调检测技术包括在时域中使用音调相关性，并检测频域中的语音或音频信号中缺少低频能量。 检测到的非常短的音调滞后使用小于传统的最小间距限制的预定的最小非常短的间距限制的音调范围进行编码。

公开(公告)号：US09099099B2

公开(公告)日：2015-08-04

申请号：US13724769

申请日：2012-12-21

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yang Gao ,  Fengyan Qi

IPC: G10L19/00 ,  G10L25/90 ,  G10L25/21 ,  G10L25/06 ,  G10L19/09

CPC classification number: G10L21/003 ,  G10L19/00 ,  G10L19/09 ,  G10L25/06 ,  G10L25/21 ,  G10L25/90

Abstract: System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.

Abstract translation: 提供了用于语音或音频信号的非常短的音调检测和编码的系统和方法实施例。 该系统和方法包括使用时域和频域音调检测技术的组合来检测语音或音频信号中是否存在比常规最小音调限制短的音调滞后。 音调检测技术包括在时域中使用音调相关性，并检测频域中的语音或音频信号中缺少低频能量。 检测到的非常短的音调滞后使用小于传统的最小间距限制的预定的最小非常短的间距限制的音调范围进行编码。

公开(公告)号：US20150206541A1

公开(公告)日：2015-07-23

申请号：US14675031

申请日：2015-03-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Zexin Liu ,  Lei Miao

IPC: G10L19/002

CPC classification number: G10L19/002 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/035

Abstract: A method and an apparatus for allocating bits of an audio signal. The method includes dividing a frequency band of an audio signal into multiple sub-bands, and quantizing a sub-band normalization factor of each sub-band; classifying the multiple sub-bands into multiple groups, and acquiring a sum of intra-group sub-band normalization factors of each group; performing initial inter-group bit allocation to determine the initial number of bits of each group; performing secondary inter-group bit allocation to allocate coding bits of the audio signal to at least one group; and allocating the bits of the audio signal to sub-bands in the group. The present invention can, by means of grouping, ensure relatively stable allocation in a previous frame and a next frame and reduce an impact of global allocation on local discontinuity in a case of low and medium bit rates.

Abstract translation: 一种用于分配音频信号的位的方法和装置。 该方法包括将音频信号的频带划分成多个子带，并量化每个子带的子带归一化因子; 将多个子带分为多个组，并获取每组的组内子带归一化因子之和; 执行初始组间比特分配以确定每组的初始比特数; 执行次要组间比特分配以将音频信号的编码比特分配给至少一个组; 并将音频信号的比特分配给组中的子带。 本发明可以通过分组确保在先前帧和下一帧中的相对稳定的分配，并且在低和中比特率的情况下减少全局分配对局部不连续性的影响。

公开(公告)号：US08712763B2

公开(公告)日：2014-04-29

申请号：US13943812

申请日：2013-07-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Fengyan Qi ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma ,  Yang Gao

IPC: G10L21/00

CPC classification number: G10L19/09 ,  G10L19/0017 ,  H04N19/50

Abstract: The present disclosure relates to a method, apparatus, and system for encoding and decoding signals. The encoding method includes: converting a first-domain signal into a second-domain signal; performing Linear Prediction (LP) processing and Long-Term Prediction (LTP) processing for the second-domain signal; obtaining a long-term flag value according to a decision criterion; obtaining a second-domain predictive signal according to the LP processing result and the LTP processing result when the long-term flag value is a first value; obtaining a second-domain predictive signal according to the LP processing result when the long-term flag value is a second value; converting the second-domain predictive signal into a first-domain predictive signal, and calculating a first-domain predictive residual signal; and outputting a bit stream that includes the first-domain predictive residual signal.

Abstract translation: 本公开涉及用于对信号进行编码和解码的方法，装置和系统。 编码方法包括：将第一域信号转换为第二域信号; 对第二域信号执行线性预测（LP）处理和长期预测（LTP）处理; 根据决策标准获得长期标志值; 当长期标志值为第一值时，根据LP处理结果和LTP处理结果获得第二域预测信号; 当长期标志值是第二值时，根据LP处理结果获得第二域预测信号; 将所述第二域预测信号转换为第一域预测信号，以及计算第一域预测残差信号; 并输出包括第一域预测残差信号的比特流。