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    Low latency and low complexity phase shift network
    2.
    发明授权
    Low latency and low complexity phase shift network 有权

    公开(公告)号：US09661190B2

    公开(公告)日：2017-05-23

    申请号：US14403812

    申请日：2013-05-14

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Yun Zhang

    IPC分类号： H03H17/04 ,  H03H17/08 ,  H03H17/00 ,  H04N5/04

    CPC分类号： H04N5/04 ,  H03H17/04 ,  H03H17/08 ,  H03H2017/009 ,  H03H2017/0472

    摘要： A high performance, low complexity phase shift network may be created with one or more non-first-order all-pass recursive filters that are built on top of a plurality of first-order and/or second-order all-pass recursive filters and/or delay lines. A target time delay, whether large or small, may be specified as a constraint for a non-first-order all-pass recursive filter. A target phase response may be determined for the non-first-order all-pass recursive filter. Phase errors between the target phase response and a calculated phase response with filter coefficients of the non-first-order all-pass recursive filter may be minimized to yield a set of optimized values for the filter coefficients of the non-first-order all-pass recursive filter.

    Systems and Methods for Calibrating Power Measurements in an Electrosurgical Generator
    3.
    发明申请
    Systems and Methods for Calibrating Power Measurements in an Electrosurgical Generator 有权
    电外科发生器校准功率测量的系统和方法

    公开(公告)号：US20120265195A1

    公开(公告)日：2012-10-18

    申请号：US13085278

    申请日：2011-04-12

    申请人： James A. Gilbert

    发明人： James A. Gilbert

    IPC分类号： A61B18/12

    CPC分类号： A61B18/1206 ,  A61B18/1233 ,  A61B18/1445 ,  A61B2018/00648 ,  A61B2018/00702 ,  A61B2018/00827 ,  A61B2018/00892 ,  H03H17/0027 ,  H03H17/0251 ,  H03H17/0283 ,  H03H21/0012 ,  H03H2017/0472

    摘要： The disclosed electrosurgical systems and methods accurately determine the power actually applied to a load by using equalizers to calibrate the power measurements. The electrosurgical systems include an electro surgical generator and an electrosurgical instrument coupled to the electrosurgical generator through an electrosurgical cable. The electro surgical generator includes an electrical energy source, voltage and current detectors, equalizers that estimate the voltage and current applied to a load, and a power calculation unit that calculates estimated power based upon the estimated voltage and current. The methods of calibrating an electro surgical generator involve applying a resistive element across output terminals of the electrosurgical generator, applying a test signal to the resistive element, measuring the magnitude and phase angle of voltage and current components of the test signal within the electrosurgical generator, estimating the magnitude and phase angle of the voltage and current at the resistive element using equalizers, and determining gain correction factors and minimum phase angles for the equalizers.

    摘要翻译： 所公开的电外科系统和方法通过使用均衡器来精确地确定实际施加到负载的功率以校准功率测量。 电外科系统包括电外科手术发生器和通过电外科电缆耦合到电外科发生器的电外科器械。 电手术发生器包括电能源，电压和电流检测器，估计施加到负载的电压和电流的均衡器，以及基于估计的电压和电流来计算估计功率的功率计算单元。 校准电外科手术发生器的方法包括在电外科发生器的输出端上施加电阻元件，向电阻元件施加测试信号，测量电外科发生器内的测试信号的电压和电流分量的大小和相位角， 使用均衡器估计电阻元件处的电压和电流的幅度和相位角，以及确定均衡器的增益校正因子和最小相位角。

    Low frequency digital notch filter
    5.
    发明授权
    Low frequency digital notch filter 失效
    低频数字陷波滤波器

    公开(公告)号：US4947360A

    公开(公告)日：1990-08-07

    申请号：US895020

    申请日：1986-08-08

    申请人： Nigel P. Dyer

    发明人： Nigel P. Dyer

    IPC分类号： H03H17/04

    CPC分类号： H03H17/04 ,  H03H2017/0472

    摘要： A low frequency digital notch filter comprising two sub-filters - an all-pass-network filter (1) and a T-section filter (3) with a feedback connection from the T-filter to an input node (31), and feed forward connection from this input node to a terminal output node (33). The all-pass-network filter (1) has a transform function:A(Z)=[Z.sup.-1 +K]/[1+K.sub.1 Z.sup.-1]; andthe T-section filter (3) has throughput and tap transform functions:B(Z)=[(K.sub.3 +K.sub.2 .multidot.K.sub.4)Z.sup.-1 -1 ]/[1-K.sub.3 Z.sup.-1 ],and,C(Z)=K.sub.2 Z.sup.-1 /[1-K.sub.3 Z.sup.-1 ],where Z.sup.-1 is the unit delay operator and K.sub.1 to K.sub.4 are multiplier coefficients. The T-section filter 3 may be implemented using a combination of three multipliers (19, 21 and 23) and a delay element (25).

    摘要翻译： 一种低频数字陷波滤波器，包括两个子滤波器 - 具有从T滤波器到输入节点（31）的反馈连接的全通滤波器（1）和T段滤波器（3），并且馈送 从该输入节点到终端输出节点（33）的前向连接。 全通滤波器（1）具有变换函数：A（Z）= [Z-1 + K] / [1 + K1Z-1]; （3）具有吞吐量和抽头变换函数：B（Z）= [（K3 + K2xK4）Z-1-1] / [1-K3Z-1]，C（Z）= K2Z -1 / [1-K3Z-1]，其中Z-1是单位延迟算子，K1到K4是乘数系数。 T段滤波器3可以使用三个乘法器（19,21和23）和延迟元件（25）的组合来实现。

    ENHANCING AUDIO USING A MOBILE DEVICE
    8.
    发明申请
    ENHANCING AUDIO USING A MOBILE DEVICE 有权
    使用移动设备增强音频

    公开(公告)号：US20160035337A1

    公开(公告)日：2016-02-04

    申请号：US14449159

    申请日：2014-08-01

    申请人： Ashish Dharmpal Aggarwal ,  Sharath Hariharpur Satheesh

    发明人： Ashish Dharmpal Aggarwal ,  Sharath Hariharpur Satheesh

    IPC分类号： G10K11/16 ,  H03G5/16 ,  H03G3/20

    CPC分类号： H04R3/04 ,  G06F3/165 ,  G10L21/0232 ,  G10L25/51 ,  H03G3/20 ,  H03G3/3005 ,  H03G3/32 ,  H03G5/005 ,  H03G5/165 ,  H03G7/002 ,  H03H17/04 ,  H03H2017/0472 ,  H04R1/08 ,  H04R3/00 ,  H04R25/50 ,  H04R25/505 ,  H04R29/00 ,  H04R29/001 ,  H04R29/004 ,  H04R2430/01 ,  H04R2499/11

    摘要： Embodiments disclosed herein enable detection and improvement of the quality of the audio signal using a mobile device by determining the loss in the audio signal and enhancing audio by streaming the remainder portion of audio. Embodiments disclosed herein enable an improvement in the sound quality rendered by rendering devices by emitting an test audio signal from the source device, measuring the test audio signal using microphones, detecting variation in the frequency response, loudness and timing characteristics using impulse responses and correcting for them. Embodiments disclosed herein also compensate for the noise in the acoustic space by determining the reverberation and ambient noise levels and their frequency characteristics and changing the digital filters and volumes of the source signal to compensate for the varying noise levels.

    摘要翻译： 本文公开的实施例通过确定音频信号中的损失并通过流式传输音频的剩余部分来增强音频，从而能够利用移动设备来检测和改善音频信号的质量。 本文公开的实施例能够通过从源设备发射测试音频信号，使用麦克风测量测试音频信号，使用脉冲响应来检测频率响应的变化，响度和定时特性来改善渲染设备所呈现的声音质量， 他们。 本文公开的实施例还通过确定混响和环境噪声水平及其频率特性以及改变源信号的数字滤波器和体积以补偿变化的噪声水平来补偿声学空间中的噪声。

    Systems and methods for calibrating power measurements in an electrosurgical generator
    9.
    发明授权
    Systems and methods for calibrating power measurements in an electrosurgical generator 有权
    用于校正电外科发生器功率测量的系统和方法

    公开(公告)号：US08968293B2

    公开(公告)日：2015-03-03

    申请号：US13085278

    申请日：2011-04-12

    申请人： James A. Gilbert

    发明人： James A. Gilbert

    IPC分类号： A61B18/12 ,  H03H21/00 ,  H03H17/00 ,  H03H17/02 ,  A61B18/14 ,  H03H17/04 ,  A61B18/00

    CPC分类号： A61B18/1206 ,  A61B18/1233 ,  A61B18/1445 ,  A61B2018/00648 ,  A61B2018/00702 ,  A61B2018/00827 ,  A61B2018/00892 ,  H03H17/0027 ,  H03H17/0251 ,  H03H17/0283 ,  H03H21/0012 ,  H03H2017/0472

    摘要： The disclosed electrosurgical systems and methods accurately determine the power actually applied to a load by using equalizers to calibrate the power measurements. The electrosurgical systems include an electro surgical generator and an electrosurgical instrument coupled to the electrosurgical generator through an electrosurgical cable. The electrosurgical generator includes an electrical energy source, voltage and current detectors, equalizers that estimate the voltage and current applied to a load, and a power calculation unit that calculates estimated power based upon the estimated voltage and current. The methods of calibrating an electro surgical generator involve applying a resistive element across output terminals of the electrosurgical generator, applying a test signal to the resistive element, measuring the magnitude and phase angle of voltage and current components of the test signal within the electrosurgical generator, estimating the magnitude and phase angle of the voltage and current at the resistive element using equalizers, and determining gain correction factors and minimum phase angles for the equalizers.

    摘要翻译： 所公开的电外科系统和方法通过使用均衡器来精确地确定实际施加到负载的功率以校准功率测量。 电外科系统包括电外科手术发生器和通过电外科电缆耦合到电外科发生器的电外科器械。 电外科发生器包括电能源，电压和电流检测器，估计施加到负载的电压和电流的均衡器，以及基于估计的电压和电流来计算估计功率的功率计算单元。 校准电外科手术发生器的方法包括在电外科发生器的输出端上施加电阻元件，向电阻元件施加测试信号，测量电外科发生器内的测试信号的电压和电流分量的大小和相位角， 使用均衡器估计电阻元件处的电压和电流的幅度和相位角，以及确定均衡器的增益校正因子和最小相位角。

    Sample rate converter having distributed filtering
    10.
    发明授权
    Sample rate converter having distributed filtering 有权
    采样率转换器具有分布式滤波

    公开(公告)号：US07280878B1

    公开(公告)日：2007-10-09

    申请号：US09427815

    申请日：1999-10-27

    申请人： David P. Rossum

    发明人： David P. Rossum

    IPC分类号： G06F17/00 ,  G06F17/17 ,  H03M7/00

    CPC分类号： H04L25/05 ,  H03H17/0294 ,  H03H17/0455 ,  H03H17/0685 ,  H03H2017/0472

    摘要： A method and a computer program product for sample rate conversion that features distributive or hybrid filtering to reduce unwanted artifacts, such as aliasing and the computational requirements to avoid the aforementioned artifacts. The method includes receiving, at a first sample rate, a plurality of data points, associated with a first signal, operating on the plurality of data points to associate the signal with a predetermined set of parameters, with the set of parameters including a first transition band having an image associated therewith; and varying the sample rate associated with the first signal by interpolation with an interpolator having associated therewith a second transition band, with the width associated with the second transition band being a function of a spectral separation between the first transition band and its image, wherein a second signal is produced having a sequence of data samples approximating the first signal.

    摘要翻译： 一种用于采样率转换的方法和计算机程序产品，其特征在于分布或混合滤波以减少不需要的伪像，例如混叠和避免上述伪像的计算要求。 该方法包括以第一采样速率接收与第一信号相关联的多个数据点，操作多个数据点以将信号与预定参数集合相关联，该参数组包括第一转换 具有与其相关联的图像; 以及通过具有与其相关联的内插器的插值来改变与第一信号相关联的采样率，第二过渡带与第二过渡频带相关联的宽度是第一过渡频带和其图像之间的频谱间隔的函数，其中a 产生具有接近第一信号的数据样本序列的第二信号。