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：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：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。