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    Signal compression method and apparatus
    3.
    发明授权
    Signal compression method and apparatus 有权
    信号压缩方法及装置

    公开(公告)号：US08396716B2

    公开(公告)日：2013-03-12

    申请号：US12648994

    申请日：2009-12-29

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

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

    IPC分类号： G10L19/00

    CPC分类号： G10L19/008 ,  G10L19/06

    摘要： A signal compression method includes: multiplying an input signal by a window function, calculating original autocorrelation coefficients of a windowed input signal. The method also includes 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. The method further includes calculating linear prediction coefficients according to the modified autocorrelation coefficients, and outputting a coded bit stream according to the linear prediction coefficients.

    摘要翻译： 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。 该方法还包括根据原始自相关系数计算白噪声校正因子或滞后窗口，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。 该方法还包括根据修正的自相关系数计算线性预测系数，并根据线性预测系数输出编码比特流。

    SIGNAL COMPRESSION METHOD AND APPARATUS
    4.
    发明申请
    SIGNAL COMPRESSION METHOD AND APPARATUS 有权
    信号压缩方法和装置

    公开(公告)号：US20100169086A1

    公开(公告)日：2010-07-01

    申请号：US12648994

    申请日：2009-12-29

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

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

    IPC分类号： G10L19/00

    CPC分类号： G10L19/008 ,  G10L19/06

    摘要： A signal compression method includes: multiplying an input signal by a window function, calculating original autocorrelation coefficients of a windowed input signal. The method also includes 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. The method further includes calculating linear prediction coefficients according to the modified autocorrelation coefficients, and outputting a coded bit stream according to the linear prediction coefficients.

    摘要翻译： 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。 该方法还包括根据原始自相关系数计算白噪声校正因子或滞后窗口，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。 该方法还包括根据修正的自相关系数计算线性预测系数，并根据线性预测系数输出编码比特流。

    Pitch detection method and apparatus
    5.
    发明授权
    Pitch detection method and apparatus 有权
    间距检测方法和装置

    公开(公告)号：US09153245B2

    公开(公告)日：2015-10-06

    申请号：US12798715

    申请日：2010-04-09

    申请人： Fengyan Qi ,  Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Qing Zhang ,  Yang Gao

    发明人： Fengyan Qi ,  Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Qing Zhang ,  Yang Gao

    IPC分类号： G10L25/90 ,  G10L19/09

    CPC分类号： G10L25/90 ,  G10L19/09

    摘要： A pitch detection method and apparatus are disclosed. The method includes: performing pitch detection on an input signal in a signal domain, and obtaining a candidate pitch; performing linear prediction (LP) on the input signal, and obtaining an LP residual signal; setting a candidate pitch range that includes the candidate pitch; searching the candidate pitch range for the LP residual signal, and obtaining a selected pitch.

    摘要翻译： 公开了一种俯仰检测方法和装置。 该方法包括：对信号域中的输入信号执行音调检测，并获得候选音调; 对输入信号执行线性预测（LP），获得LP残差信号; 设置包括候选音调的候选音高范围; 搜索候选音调范围用于LP残差信号，并获得所选音调。

    Method for encoding signal, and method for decoding signal
    6.
    发明授权
    Method for encoding signal, and method for decoding signal 有权
    信号编码方法，信号解码方法

    公开(公告)号：US08515744B2

    公开(公告)日：2013-08-20

    申请号：US13172575

    申请日：2011-06-29

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

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

    IPC分类号： G10L19/00

    CPC分类号： G10L19/09 ,  G10L19/0017 ,  H04N19/50

    摘要： Method, apparatus, and system for encoding and decoding signals are disclosed. 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 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 is a first flag; or obtaining a second-domain predictive signal according to the LP processing result when the long-term flag is a second flag; converting the second-domain predictive signal into a first-domain predictive signal, calculating a first-domain predictive residual signal; and outputting a bit stream that includes the first-domain predictive residual signal. Subsequent encoding or decoding process is performed adaptively according to the long-term flag; and it is not always necessary to consider the LTP processing result, thus improving the compression performance of codec.

    摘要翻译： 公开了用于编码和解码信号的方法，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国旗; 当长期标志是第一标志时，根据LP处理结果和LTP处理结果获得第二域预测信号; 或者当长期标志是第二标志时根据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，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。 随后的编码或解码过程根据长期标志自适应地执行; 并不总是需要考虑LTP处理结果，从而提高了编解码器的压缩性能。

    Method, apparatus and system for linear prediction coding analysis
    7.
    发明授权
    Method, apparatus and system for linear prediction coding analysis 有权
    用于线性预测编码分析的方法，装置和系统

    公开(公告)号：US08812307B2

    公开(公告)日：2014-08-19

    申请号：US13228965

    申请日：2011-09-09

    申请人： Jianfeng Xu ,  Lei Miao ,  Fengyan Qi ,  Dejun Zhang ,  Qing Zhang

    发明人： Jianfeng Xu ,  Lei Miao ,  Fengyan Qi ,  Dejun Zhang ,  Qing Zhang

    IPC分类号： G10L19/00 ,  G10L19/022 ,  G10L19/04

    CPC分类号： G10L19/022 ,  G10L19/04

    摘要： The present invention relates to communication technologies and discloses a method, an apparatus and a system for Linear Prediction Coding (LPC) analysis to improve LPC prediction performance and simplify analysis operation. The method includes: obtaining signal feature information of at least one sample point of input signals; comparing and analyzing the signal feature information to obtain an analysis result; selecting a window function according to the analysis result to perform adaptive windowing for the input signals and obtain windowed signals; and processing the windowed signals to obtain an LPC coefficient for linear prediction. The embodiments of the present invention are applicable to LPC.

    摘要翻译： 本发明涉及通信技术，并且公开了一种用于线性预测编码（LPC）分析的方法，装置和系统，以提高LPC预测性能并简化分析操作。 该方法包括：获取输入信号的至少一个采样点的信号特征信息; 比较和分析信号特征信息以获得分析结果; 根据分析结果选择窗口功能，对输入信号进行自适应窗口化，获得窗口信号; 并处理窗口信号以获得用于线性预测的LPC系数。 本发明的实施例可应用于LPC。

    Preprocessing method, preprocessing apparatus and coding device
    8.
    发明授权
    Preprocessing method, preprocessing apparatus and coding device 有权
    预处理方法，预处理装置和编码装置

    公开(公告)号：US08566085B2

    公开(公告)日：2013-10-22

    申请号：US12724066

    申请日：2010-03-15

    申请人： Lei Miao ,  Fengyan Qi ,  Jianfeng Xu ,  Dejun Zhang ,  Qing Zhang

    发明人： Lei Miao ,  Fengyan Qi ,  Jianfeng Xu ,  Dejun Zhang ,  Qing Zhang

    IPC分类号： G10L19/00

    CPC分类号： G10L21/06 ,  G10L19/06 ,  G10L19/09 ,  G10L19/18

    摘要： The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.

    摘要翻译： 本公开涉及编码和解码技术，并且公开了一种预处理方法，预处理装置和编码装置。 预处理方法包括：获得当前帧信号的特征信息; 识别当前帧信号是否不需要根据当前帧信号和预设信息的特征信息去除LTC的编码操作; 并且如果识别出当前帧信号不需要去除LTC的编码操作，则执行去除当前帧信号的STC的编码操作; 并且如果识别当前帧信号需要去除LTC的编码操作，则执行去除当前帧信号的LTC和STC的编码操作。 通过本文提供的技术方案，仅对部分输入帧信号执行去除LTC的编码操作。

    METHOD AND APPARATUS FOR OBTAINING PITCH GAIN, AND CODER AND DECODER
    9.
    发明申请
    METHOD AND APPARATUS FOR OBTAINING PITCH GAIN, AND CODER AND DECODER 审中-公开
    用于获取增益的方法和装置，以及编码器和解码器

    公开(公告)号：US20110218800A1

    公开(公告)日：2011-09-08

    申请号：US13109679

    申请日：2011-05-17

    申请人： Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Fengyan Qi ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma

    发明人： Dejun Zhang ,  Lei Miao ,  Jianfeng Xu ,  Fengyan Qi ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma

    IPC分类号： G10L21/00

    CPC分类号： G10L19/08 ,  G10L2019/0011

    摘要： The present invention relates to a method and apparatus for obtaining a pitch gain, and a coder and a decoder. The method includes: obtaining information about an input signal; and obtaining a pitch gain corresponding to the information about the input signal according to the correspondence between the signal information and the pitch gain. The embodiments of the present invention obtain the corresponding pitch gain according to the signal information by using the obtained correspondence between the signal information and the pitch gain, and the pitch gain is applicable to the coder and the decoder, thus making it unnecessary for the coder to transmit the pitch gain to the decoder and solving the problem of bit overhead. The embodiments of the present invention determine the pitch gain adaptively according to the signal information, avoid consumption of extra bits for quantizing the pitch gain, avoid impact on the coding performance, and improve the compression ratio.

    摘要翻译： 本发明涉及一种用于获得音调增益的方法和装置，以及编码器和解码器。 该方法包括：获取关于输入信号的信息; 并且根据信号信息和音调增益之间的对应关系，获得与输入信号有关的信息对应的音调增益。 本发明的实施例通过使用获得的信号信息和音调增益之间的对应关系，根据信号信息获得相应的音调增益，并且音调增益可应用于编码器和解码器，从而不需要编码器 将音调增益发送到解码器并解决位开销的问题。 本发明的实施例根据信号信息自适应地确定音调增益，避免消耗用于量化音调增益的额外比特，避免对编码性能的影响，并提高压缩比。

    Framing method and apparatus
    10.
    发明授权
    Framing method and apparatus 有权
    框架方法和装置

    公开(公告)号：US08843366B2

    公开(公告)日：2014-09-23

    申请号：US12982142

    申请日：2010-12-30

    申请人： Dejun Zhang ,  Fengyan Qi ,  Lei Miao ,  Jianfeng Xu ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma

    发明人： Dejun Zhang ,  Fengyan Qi ,  Lei Miao ,  Jianfeng Xu ,  Qing Zhang ,  Lixiong Li ,  Fuwei Ma

    IPC分类号： G10L19/00 ,  G10L19/04 ,  G10L19/005

    CPC分类号： G10L19/04 ,  G10L19/005 ,  G10L19/09

    摘要： A framing method and apparatus are disclosed to overcome inconsistency of gains between sub-frames caused by simple average framing in the prior art. The method includes: obtaining the Linear Prediction Coding (LPC) order and the pitch of the signal; removing the samples inapplicable to Long-Term Prediction (LTP) synthesis according to the LPC prediction order and the pitch; and splitting the remaining samples of the signal into several sub-frames. The technical solution under the present invention is applicable to the multimedia speech coding field.

    摘要翻译： 公开了一种框架方法和装置，以克服由现有技术中的简单平均框架引起的子帧之间的增益不一致。 该方法包括：获得线性预测编码（LPC）顺序和信号的音调; 根据LPC预测顺序和间距，去除不适用于长期预测（LTP）合成的样本; 并将该信号的剩余采样分成几个子帧。 本发明的技术方案适用于多媒体语音编码领域。