公开(公告)号：US20150269947A1

公开(公告)日：2015-09-24

申请号：US14730524

申请日：2015-06-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

IPC: G10L19/002 ,  G10L19/02

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.

Abstract translation: 一种解码信号的方法和装置。 用于解码信号的方法包括：通过解码从接收到的比特流获得子带的频谱系数; 将频谱系数定位到具有饱和比特分配的子带和具有不饱和比特分配的子带的子带中; 对未通过解码获得的频谱系数进行噪声填充，并且在具有不饱和位分配的子带中进行噪声填充，以恢复未通过解码获得的频谱系数; 并根据通过解码获得的频谱系数和恢复的频谱系数获得频域信号。 因此，可以通过分类获得频域信号中具有不饱和位分配的子带，从而提高信号解码质量。

公开(公告)号：US20150255080A1

公开(公告)日：2015-09-10

申请号：US14721606

申请日：2015-05-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/03 ,  G10L19/26 ,  G10L19/12

CPC classification number: G10L19/03 ,  G10L19/0204 ,  G10L19/12 ,  G10L19/26 ,  G10L19/265 ,  G10L21/038 ,  G10L2019/0016

Abstract: An encoding method, a decoding method, an encoding apparatus, a decoding apparatus, a transmitter, a receiver, and a communications system. The encoding method includes: dividing a to-be-encoded time-domain signal into a low band signal and a high band signal; performing encoding on the low band signal to obtain a low frequency encoding parameter; performing encoding on the high band signal to obtain a high frequency encoding parameter, and obtaining a synthesized high band signal; performing short-time post-filtering processing on the synthesized high band signal to obtain a short-time filtering signal; and calculating a high frequency gain based on the high band signal and the short-time filtering signal. A technical solution according to the embodiments of the present invention can improve an encoding and/or decoding effect.

Abstract translation: 编码方法，解码方法，编码装置，解码装置，发射机，接收机和通信系统。 编码方法包括：将待编码的时域信号划分为低频带信号和高频带信号; 对低频信号执行编码以获得低频编码参数; 对高频带信号执行编码以获得高频编码参数，并获得合成的高频带信号; 对合成的高频带信号执行短时后滤波处理以获得短时滤波信号; 以及基于所述高频带信号和所述短时间滤波信号计算高频增益。 根据本发明的实施例的技术方案可以提高编码和/或解码效果。

公开(公告)号：US20150162011A1

公开(公告)日：2015-06-11

申请号：US14595672

申请日：2015-01-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao ,  Zexin Liu

IPC: G10L19/002

CPC classification number: G10L19/002 ,  G10L19/0204

Abstract: A method and an apparatus for allocating bits in an audio signal. The method includes dividing a frequency band of an audio signal into a plurality of subbands, quantizing a subband normalization factor of each subband; and an energy attribute of an audio signal of the corresponding group; allocating coding bits to at least one group, where a sum of coding bits allocated to the at least one group is the number of coding bits of the audio signal; and allocating the coding bits allocated to the at least one group to each subband in each group of the at least one group. In a case of a low or medium bit rate, the embodiments of the present invention can, by means of grouping, ensure relatively stable allocation of previous and subsequent frames and reduce impact of global allocation on partial discontinuity.

Abstract translation: 一种用于在音频信号中分配比特的方法和装置。 该方法包括将音频信号的频带划分成多个子带，量化每个子带的子带归一化因子; 以及相应组的音频信号的能量属性; 将编码比特分配给至少一个组，其中分配给所述至少一个组的编码比特的和是所述音频信号的编码比特数; 以及将分配给所述至少一个组的编码比特分配给所述至少一个组的每个组中的每个子带。 在低或中等比特率的情况下，本发明的实施例可以通过分组来确保前一帧和后续帧的相对稳定的分配，并减少全局分配对部分不连续性的影响。

公开(公告)号：US08805695B2

公开(公告)日：2014-08-12

申请号：US13947778

申请日：2013-07-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/00

CPC classification number: G10L19/008 ,  G10L19/04 ,  G10L21/0388

Abstract: A bandwidth expansion method and apparatus are disclosed, where the method includes: estimating a bandwidth of at least one decoded frame of a whole-band signal, so as to obtain an estimated bandwidth, where the estimated bandwidth corresponds to a whole-band signal that a decoded lower-band signal needs to be extended into; performing first predictive decoding on a part of the lower-band signal in a band above an effective bandwidth of the lower-band signal and below the estimated bandwidth, so as to obtain the part of the lower-band signal above the effective bandwidth of the lower-band signal and below the estimated bandwidth; and performing second predictive decoding on a part of the lower-band signal in a band above the estimated bandwidth, so as to obtain the part of the lower-band signal above the estimated bandwidth.

Abstract translation: 公开了一种带宽扩展方法和装置，其中所述方法包括：估计全频带信号的至少一个解码帧的带宽，以获得估计带宽，其中估计带宽对应于全带信号， 解码的低频信号需要扩展到; 对低频带信号的有效带宽以上的频带内的低频带信号的一部分进行第一预测解码，并且低于估计的带宽，以便将低频带信号的部分低于有效带宽 低频信号和低于估计的带宽; 以及在所述估计带宽以上的频带中对所述低频带信号的一部分执行第二预测解码，以便获得所述低频带信号的所述估计带宽以上的部分。

公开(公告)号：US20140142931A1

公开(公告)日：2014-05-22

申请号：US14136130

申请日：2013-12-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/02

CPC classification number: G10L19/02 ,  G10L25/90

Abstract: The present invention discloses a pitch detection method and apparatus, which belong to the field of speech and audio. The pitch detection method includes: performing pitch detection on a speech signal in a time domain to obtain an initial pitch period; converting the speech signal to a frequency domain to obtain a frequency spectrum of the speech signal, where the frequency spectrum includes a magnitude spectrum of the frequency spectrum; extracting a feature parameter according to the initial pitch period and the frequency spectrum of the speech signal; and performing fine pitch period detection according to the initial pitch period and the feature parameter to obtain a fine pitch period.

Abstract translation: 本发明公开了一种属于语音领域的音调检测方法和装置。 音调检测方法包括：对时域中的语音信号执行音调检测以获得初始音调周期; 将语音信号转换为频域以获得语音信号的频谱，其中频谱包括频谱的幅度谱; 根据初始音调周期和语音信号的频谱提取特征参数; 并且根据初始音调周期和特征参数执行精细音调周期检测以获得精细音调周期。

公开(公告)号：US20140044192A1

公开(公告)日：2014-02-13

申请号：US14057646

申请日：2013-10-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: H04N7/30

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 class 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 class 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; 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信息。

公开(公告)号：US20130317831A1

公开(公告)日：2013-11-28

申请号：US13947778

申请日：2013-07-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L19/04 ,  G10L21/0388

Abstract: A bandwidth expansion method and apparatus are disclosed, where the method includes: estimating a bandwidth of at least one decoded frame of a whole-band signal, so as to obtain an estimated bandwidth, where the estimated bandwidth corresponds to a whole-band signal that a decoded lower-band signal needs to be extended into; performing first predictive decoding on a part of the lower-band signal in a band above an effective bandwidth of the lower-band signal and below the estimated bandwidth, so as to obtain the part of the lower-band signal above the effective bandwidth of the lower-band signal and below the estimated bandwidth; and performing second predictive decoding on a part of the lower-band signal in a band above the estimated bandwidth, so as to obtain the part of the lower-band signal above the estimated bandwidth.

Abstract translation: 公开了一种带宽扩展方法和装置，其中所述方法包括：估计全频带信号的至少一个解码帧的带宽，以获得估计带宽，其中估计带宽对应于全带信号， 解码的低频信号需要扩展到; 对低频带信号的有效带宽以上的频带内的低频带信号的一部分进行第一预测解码，并且低于估计的带宽，以便将低频带信号的部分低于有效带宽 低频信号和低于估计的带宽; 以及在所述估计带宽以上的频带中对所述低频带信号的一部分执行第二预测解码，以便获得所述低频带信号的所述估计带宽以上的部分。

公开(公告)号：US20130304460A1

公开(公告)日：2013-11-14

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: G10L19/09

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。

公开(公告)号：US08560329B2

公开(公告)日：2013-10-15

申请号：US13728256

申请日：2012-12-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao ,  Jianfeng Xu ,  Dejun Zhang ,  Herve Marcel Taddei ,  Qing Zhang

IPC: G10L19/00

CPC classification number: G10L19/008 ,  G10L19/06

Abstract: A signal compression method and apparatus are provided. The signal compression method includes: multiplying an input signal by a window function; calculating original autocorrelation coefficients of a windowed input signal; calculating a white-noise correction factor or a lag-window according to the original autocorrelation coefficients, and calculating modified autocorrelation coefficients according to the original autocorrelation coefficients, the white-noise correction factor and the lag-window; calculating linear prediction coefficients according to the modified autocorrelation coefficients; and outputting a coded bit stream according to the linear prediction coefficients.

Abstract translation: 提供信号压缩方法和装置。 信号压缩方法包括：将输入信号乘以窗口函数; 计算窗口输入信号的原始自相关系数; 根据原始自相关系数计算白噪声校正因子或滞后窗，并根据原始自相关系数，白噪声校正因子和滞后窗计算修正的自相关系数; 根据修正的自相关系数计算线性预测系数; 以及根据线性预测系数输出编码比特流。

公开(公告)号：US20130117030A1

公开(公告)日：2013-05-09

申请号：US13728256

申请日：2012-12-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fengyan Qi ,  Lei Miao ,  Jianfeng Xu ,  Dejun Zhang ,  Marcel Taddei Herve ,  Qing Zhang

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L19/06

Abstract: A signal compression method and apparatus are provided. The signal compression method includes: multiplying an input signal by a window function; calculating original autocorrelation coefficients of a windowed input signal; calculating a white-noise correction factor or a lag-window according to the original autocorrelation coefficients, and calculating modified autocorrelation coefficients according to the original autocorrelation coefficients, the white-noise correction factor and the lag-window; calculating linear prediction coefficients according to the modified autocorrelation coefficients; and outputting a coded bit stream according to the linear prediction coefficients.

Abstract translation: 提供信号压缩方法和装置。 信号压缩方法包括：将输入信号乘以窗口函数; 计算窗口输入信号的原始自相关系数; 根据原始自相关系数计算白噪声校正因子或滞后窗，并根据原始自相关系数，白噪声校正因子和滞后窗计算修正的自相关系数; 根据修正的自相关系数计算线性预测系数; 以及根据线性预测系数输出编码比特流。