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    • 93. 发明授权
    • Method and system for reducing effects of noise producing artifacts in a voice codec
    • 用于减少语音编解码器中噪声产生伪像的影响的方法和系统
    • US07454335B2
    • 2008-11-18
    • US11385553
    • 2006-03-20
    • Yang GaoEyal Shlomot
    • Yang GaoEyal Shlomot
    • G10L21/02G10L19/06
    • H03G3/3089G10L21/045H03G3/341
    • There is provided a method of reducing effect of noise producing artifacts in silence areas of a speech signal for use by a speech decoding system. The method comprises obtaining a plurality of incoming samples of a speech subframe; summing an absolute value of an energy level for each of the plurality of incoming samples to generate a total input level (gain_in); smoothing the total input level to generate a smoothed level (Level_in_sm); determining that the speech subframe is in a silence area based on the total input level, the smoothed level and a spectral tilt parameter; defining a gain using k1*(Level_in_sm/1024)+(1−k1), where K1 is a function of the spectral tilt parameter; and modifying an energy level of the speech subframe using the gain.
    • 提供了一种减少由语音解码系统使用的语音信号的静音区域中产生噪声的噪声的影响的方法。 该方法包括获得语音子帧的多个输入样本; 将多个输入样本中的每一个的能级的绝对值求和以产生总输入电平(gain_in); 平滑总输入电平以产生平滑电平(Level_in_sm); 基于总输入电平,平滑电平和频谱倾斜参数,确定语音子帧在静音区域中; 使用k1 *(Level_in_sm / 1024)+(1-k1)定义增益,其中K1是频谱倾斜参数的函数; 以及使用所述增益来修改所述语音子帧的能级。
    • 94. 发明申请
    • Speech Coding System to Improve Packet Loss Concealment
    • 语音编码系统,提高数据包丢失隐藏
    • US20080154588A1
    • 2008-06-26
    • US11942118
    • 2007-11-19
    • Yang Gao
    • Yang Gao
    • G10L19/12
    • G10L19/005G10L19/083G10L19/09
    • A method of significantly reducing error propagation due to voice packet loss, while still greatly profiting from long-term pitch prediction, is achieved by adaptively limiting the maximum value of the pitch gain for the first pitch cycle within one frame. A speech coding system for encoding a speech signal, wherein said a plurality of speech frames are classified into said a plurality of classes depending on if the first pitch cycle is included in one subframe or several subframes. The pitch gain is set to a value significantly smaller than 1 for the subframes covering first pitch cycle; wherein the pitch gain reduction is compensated by increasing the coded excitation codebook size or adding one more stage of excitation for the subframes covering the first pitch cycle.
    • 通过自适应地限制在一帧内的第一音调周期的音调增益的最大值,可以实现显着减少由于语音分组丢失导致的误差传播的方法,同时从长期音调预测中获得巨大利益。 一种用于对语音信号进行编码的语音编码系统,其中根据第一音调周期是包括在一个子帧还是几个子帧中,所述多个语音帧被分类成所述多个类别。 对于覆盖第一音调周期的子帧,音调增益被设置为明显小于1的值; 其中通过增加编码的激励码本大小或对覆盖第一音调周期的子帧增加一个激励级来补偿音调增益减小。
    • 95. 发明申请
    • Gain Quantization System for Speech Coding to Improve Packet Loss Concealment
    • 增强语音编码量化系统,提高数据包丢失隐藏
    • US20080154587A1
    • 2008-06-26
    • US11942102
    • 2007-11-19
    • Yang Gao
    • Yang Gao
    • G10L19/12
    • G10L19/083G10L19/005
    • In order to recover the excitation energy quickly and keep the adaptive excitation contribution percentage in the entire excitation after bit-stream packet loss, the two excitation gains (Gp 305 and Gc 306) can be first transformed into the two other special parameters: one is the entire excitation energy and another is the energy ratio of the adaptive excitation contribution portion relative to the entire excitation energy. Then, the transformed parameters are quantized and sent to decoder. At the decoder side, the quantized parameters are transformed back to the original form of the gains (Gp 305 and Gc 306).
    • 为了快速恢复激发能量,并且在位流分组丢失之后的整个激励中保持自适应激励贡献百分比,两个激励增益(G< p> 305和< > 306)可以首先转化为其他两个特殊参数:一个是整个激发能,另一个是自适应激励贡献部分相对于整个激发能的能量比。 然后,将变换的参数量化并发送到解码器。 在解码器侧,量化的参数被转换回增益的原始形式(G< p< 305> 306> 306)。
    • 96. 发明申请
    • Robust Method of Echo Suppressor
    • 回波抑制器的鲁棒方法
    • US20080152156A1
    • 2008-06-26
    • US11942093
    • 2007-11-19
    • Yang Gao
    • Yang Gao
    • H04B3/20
    • H04M9/082
    • This invention proposed an Echo Suppressor which can efficiently suppress both echoes and background noise without introducing “choppiness”. The Echo Suppressor System includes said two adaptive gains Gr(RSR) and Gn(NSR), said one adaptive zeros-filter A1(z) and said one adaptive poles-filter A2(z); wherein, thr gain Gr(RSR) is controlled by RSR (Residual echo level to Signal level Ratio); the gain Gn(NSR) is controlled by NSR (Noise signal level to current Signal (Tx) level Ratio); the filter A1(z) is converted from LSF1 obtained from the first modification of LSFTx (Line Spectral Frequencies of Tx signal); the filter A2(z) is converted from LSF2 obtained from the second modification of LSFTx.
    • 本发明提出了一种可以有效抑制回波和背景噪声的Echo抑制器,而不引入“choppiness”。 回波抑制器系统包括所述两个自适应增益G(RSR)和G N(NSR),所述一个自适应零点滤波器A 1&lt; 1& (z)和所述一个自适应极滤波器A 2(z); 其中,增益G RSR(RSR)由RSR(残余回波电平到信号电平比))控制; 增益G N(NSR)由NSR(噪声信号电平到当前信号(Tx)电平比)控制); 滤波器A 1(z)从从LSF Tx的第一修改(Tx信号的线谱频率)获得的LSF <1> 1转换; 滤波器A 2(z)从LSF 的第二修改获得的LSF <2> 2转换。
    • 97. 发明申请
    • Imidazolylmethyl and Pyrazolylmethyl Heteroaryl Derivatives
    • 咪唑甲基和吡唑基甲基杂芳基衍生物
    • US20080132510A1
    • 2008-06-05
    • US11814391
    • 2006-01-19
    • Bingsong HanYang GaoLinghong Xie
    • Bingsong HanYang GaoLinghong Xie
    • A61K31/519A61K31/503A61K31/4745C07D487/02C07D498/02
    • C07D487/04C07D471/04C07D513/04
    • Compounds of Formula I and Formula II are provided, as are methods for their preparation. The variables Y, Z1, Z2, Z3, R4, R5, R6, R7, R8 and Ar in the above formula are defined herein. Such compounds may be used to modulate ligand binding to GABAA receptors in vivo or in vitro, and are particularly useful in the treatment of a variety of central nervous system (CNS) disorders in humans, domesticated companion animals and livestock animals. Compounds provided herein may be administered alone or in combination with one or more other CNS agents to potentiate the effects of the other CNS agent(s). Pharmaceutical compositions and methods for treating such disorders are provided, as are methods for using such ligands for detecting GABAA receptors (e.g., receptor localization studies).
    • 提供式I和式II的化合物,以及它们的制备方法。 变量Y,Z 1,Z 2,Z 3,R 4,R 5, 上述式中R 6,R 6,R 7,R 8和Ar定义如上。 这样的化合物可用于在体内或体外调节配体与GABA A A受体的结合,并且特别可用于治疗人类中的各种中枢神经系统(CNS)紊乱,驯养伴侣动物 和牲畜。 本文提供的化合物可以单独施用或与一种或多种其它CNS剂组合施用,以增强其它CNS剂的作用。 还提供了用于治疗这种病症的药物组合物和方法,以及使用这种配体检测GABA A受体的方法(例如,受体定位研究)。
    • 100. 发明申请
    • Method and system for reducing effects of noise producing artifacts in a voice codec
    • 用于减少语音编解码器中噪声产生伪像的影响的方法和系统
    • US20070219791A1
    • 2007-09-20
    • US11385553
    • 2006-03-20
    • Yang GaoEyal Shlomot
    • Yang GaoEyal Shlomot
    • G10L15/20
    • H03G3/3089G10L21/045H03G3/341
    • There is provided a method of reducing effect of noise producing artifacts in silence areas of a speech signal for use by a speech decoding system. The method comprises obtaining a plurality of incoming samples of a speech subframe; summing an absolute value of an energy level for each of the plurality of incoming samples to generate a total input level (gain_in); smoothing the total input level to generate a smoothed level (Level_in_sm); determining that the speech subframe is in a silence area based on the total input level, the smoothed level and a spectral tilt parameter; defining a gain using k1*(Level_in_sm/1024)+(1-k1), where K1 is a function of the spectral tilt parameter; and modifying an energy level of the speech subframe using the gain.
    • 提供了一种减少由语音解码系统使用的语音信号的静音区域中产生噪声的噪声的影响的方法。 该方法包括获得语音子帧的多个输入样本; 将多个输入样本中的每一个的能级的绝对值求和以产生总输入电平(gain_in); 平滑总输入电平以产生平滑电平(Level_in_sm); 基于总输入电平,平滑电平和频谱倾斜参数,确定语音子帧在静音区域中; 使用k1 *(Level_in_sm / 1024)+(1-k1)定义增益,其中K1是频谱倾斜参数的函数; 以及使用所述增益来修改所述语音子帧的能级。