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    • 12. 发明申请
    • DETECTION OF PARKING LOT CONTEXT
    • 检测停车场情况
    • US20160377731A1
    • 2016-12-29
    • US14753408
    • 2015-06-29
    • QUALCOMM Technologies International, Ltd.
    • Vivek GargMadhukar Ramamurthy
    • G01S19/42G01S19/24
    • G01S19/42G01S19/24
    • The system provides a global navigation satellite system (GNSS) receiver in a vehicle including a radio frequency (RF) receiving circuit for receiving GNSS signals from a plurality of GNSS satellites orbiting Earth at different elevations, and a processor. The processor is configured to calculate a first signal to noise ratio (SNR) for a first GNSS satellite, calculate a second SNR for a second GNSS satellite, monitor a relative change in the first SNR with respect to the second SNR over time, determine that the GNSS receiver has entered a parking garage based on the relative change in the first SNR with respect to the second SNR, in response to this determination, restrict a positioning algorithm to estimate the position of the vehicle upon the vehicle exiting the parking garage to be within a specified range of a known position of an entrance of the parking garage.
    • 该系统在车辆中提供全球导航卫星系统(GNSS)接收机,其包括用于从在不同高度绕地球轨道运行的多个GNSS卫星接收GNSS信号的射频(RF)接收电路和处理器。 处理器被配置为计算第一GNSS卫星的第一信噪比(SNR),计算第二GNSS卫星的第二SNR,监测第一SNR相对于第二SNR随时间的相对变化,确定 GNSS接收机基于第一SNR相对于第二SNR的相对变化进入停车库,响应于该确定,限制定位算法以估计车辆离开停车库的车辆的位置为 在停车库入口的已知位置的指定范围内。
    • 14. 发明申请
    • SPEAKER ALIGNMENT
    • 扬声器对齐
    • US20160309277A1
    • 2016-10-20
    • US14686292
    • 2015-04-14
    • QUALCOMM Technologies International, Ltd.
    • Paul HISCOCK
    • H04S7/00H04R5/04
    • H04S7/302H04R3/12H04R5/04H04S7/301H04S2400/13
    • A controller for controlling a system of speakers, the system of speakers being configured to play out audio signals. The controller is configured to, for each speaker of the system of speakers, (i) transmit a signal to that speaker comprising identification data for that speaker, and (ii) transmit a signal to that speaker comprising an indication of a playout time for playing out an identification sound signal comprising the identification data of that speaker. The controller is configured to receive data indicative of a played out identification sound signal from each speaker as received at a listening location, compare the played out identification sound signals received from the speakers, and based on that comparison, control the speakers to adjust parameters of audio signals played out from the speakers so as to align those played out audio signals at the listening location.
    • 一种用于控制扬声器系统的控制器,所述扬声器系统被配置为播放音频信号。 控制器被配置为:对于扬声器系统的每个扬声器,(i)向该扬声器发送包括该扬声器的识别数据的信号,以及(ii)向该扬声器发送包括播放播放时间的指示的信号 输出包括该扬声器的识别数据的识别声音信号。 控制器被配置为接收来自在收听位置处接收到的来自每个扬声器的播放的识别声音信号的数据,比较从扬声器接收的所播放的识别声音信号,并且基于该比较,控制扬声器以调整参数 音频信号从扬声器播放,以便在收听位置对准那些播放的音频信号。
    • 15. 发明申请
    • CORRELATION-BASED TWO MICROPHONE ALGORITHM FOR NOISE REDUCTION IN REVERBERATION
    • 用于减少噪声的基于相关的两个麦克风算法
    • US20160275966A1
    • 2016-09-22
    • US14658873
    • 2015-03-16
    • QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.
    • Nima Yousefian JaziRogerio Guedes Alves
    • G10L21/0316
    • G10L21/0208G10L21/0232G10L21/0264G10L21/0316G10L2021/02165G10L2021/02166
    • Embodiments are directed towards providing speech enhancement of audio signals from a target source and noise reduction of audio signals from a noise source. A coherence between a first audio signal from a first microphone and a second audio signal from a second microphone may be determined. A first gain function may be determined based on real components of a coherence function, wherein the real components include coefficients based on the previously determined coherence. A second gain function may be determined based on imaginary components of the coherence function. And a third gain function may be determined based on a relationship between a real component of the coherence function and a threshold range. An enhanced audio signal may be generated by applying a combination of the first gain function, the second gain function, and the third gain function to the first audio signal.
    • 实施例旨在提供来自目标源的音频信号的语音增强和来自噪声源的音频信号的降噪。 可以确定来自第一麦克风的第一音频信号和来自第二麦克风的第二音频信号之间的相干性。 可以基于相干函数的实际分量来确定第一增益函数,其中,实际分量包括基于先前确定的相干性的系数。 可以基于相干函数的虚部来确定第二增益函数。 并且可以基于相干函数的实部分量与阈值范围之间的关系来确定第三增益函数。 可以通过将第一增益函数,第二增益函数和第三增益函数的组合应用于第一音频信号来生成增强音频信号。
    • 16. 发明授权
    • Pulse-width modulation generator
    • 脉宽调制发生器
    • US09431973B2
    • 2016-08-30
    • US14480161
    • 2014-09-08
    • QUALCOMM TECHNOLOGIES International, Ltd.
    • David Chappaz
    • H03F3/217H03F3/183H03K3/017
    • H03F3/183H03F3/217H03F2200/03H03K3/017
    • The present application relates to a pulse-width modulation generator for generating a pulse-width modulated signal, the PWM generator comprising: a PWM modulator; and a loop filter, wherein the loop filter is configured to receive an input signal and to output a filtered signal to the PWM modulator, and the PWM modulator is configured to receive the filtered signal from the loop filter and to output a pulse-width modulated signal, the PWM generator further comprising: a feedback loop coupling an output of the PWM modulator to an input of the loop filter, wherein the feedback loop includes a comb filter.
    • 本发明涉及用于产生脉冲宽度调制信号的脉冲宽度调制发生器,所述PWM发生器包括:PWM调制器; 以及环路滤波器,其中所述环路滤波器被配置为接收输入信号并将经滤波的信号输出到所述PWM调制器,并且所述PWM调制器被配置为从所述环路滤波器接收经滤波的信号并输出​​脉宽调制 所述PWM发生器还包括:将所述PWM调制器的输出耦合到所述环路滤波器的输入端的反馈回路,其中所述反馈回路包括梳状滤波器。
    • 18. 发明授权
    • Error measurement and calibration of analog to digital converters
    • 模数转换器误差测量和校准
    • US09362938B2
    • 2016-06-07
    • US14487166
    • 2014-09-16
    • QUALCOMM Technologies International, Ltd.
    • Hashem Zare-HoseiniDimitrios Mavridis
    • H03M1/38H03M1/10H03M1/46H03M1/40
    • H03M1/1071H03M1/1009H03M1/38H03M1/403H03M1/466H03M1/468
    • Methods of measuring capacitance error in a successive approximation register (SAR) analog to digital converter (ADC) are described, including a method in which said ADC includes a register and a digital to analog converter (DAC), and the method comprises connecting a first capacitance associated with a first bit of the DAC between a first reference voltage and a second reference voltage, connecting a first set of one or more capacitances associated with one or more other bits of the DAC between the first reference voltage and a third reference voltage, connecting the first capacitance between a first node and the third reference voltage, connecting the first set of one or more capacitances between the first node and the second reference voltage, and measuring a voltage at the first node to determine a representation of a difference between the first capacitance and a total capacitance of the first set of one or more capacitances.
    • 描述了在逐次逼近寄存器(SAR)模数转换器(ADC)中测量电容误差的方法,包括其中所述ADC包括寄存器和数模转换器(DAC)的方法,并且该方法包括连接第一 与第一参考电压和第二参考电压之间的与DAC的第一位相关联的电容,将与DAC的一个或多个其他位相关联的第一组一个或多个电容连接在第一参考电压和第三参考电压之间, 连接第一节点和第三参考电压之间的第一电容,连接第一节点和第二参考电压之间的第一组一个或多个电容,以及测量第一节点处的电压,以确定第 第一电容和第一组一个或多个电容的总电容。