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    STEREO REPRODUCTION APPARATUS
    3.
    发明申请
    STEREO REPRODUCTION APPARATUS 有权

    公开(公告)号：US20170295444A1

    公开(公告)日：2017-10-12

    申请号：US15471003

    申请日：2017-03-28

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： HIROKI FURUKAWA

    IPC分类号： H04S1/00 ,  H04H40/72

    CPC分类号： H04S1/002 ,  H04B1/1646 ,  H04H40/63 ,  H04H40/72 ,  H04S2420/07

    摘要： A right expected value generator generates an expected value of a right channel spectrum from the right channel spectrum. Further, a left expected value generator generates an expected value of a left channel spectrum from the left channel spectrum. Further, a right channel spectrum corrector so corrects a right channel spectrum outputted from a second synthesizer that the right channel spectrum does not exceed the expected value of the right channel spectrum. Moreover, a left channel spectrum corrector so corrects a left channel spectrum outputted from the second synthesizer that the left channel spectrum does not exceed the expected value of the left channel spectrum.

    Adaptive FM demodulator supporting multiple modes
    6.
    发明授权
    Adaptive FM demodulator supporting multiple modes 有权
    自适应FM解调器支持多种模式

    公开(公告)号：US09143087B2

    公开(公告)日：2015-09-22

    申请号：US14083900

    申请日：2013-11-19

    申请人： QUALCOMM Incorporated

    发明人： Eunmo Kang ,  Le Nguyen Luong ,  Yossef Tsfaty

    IPC分类号： H03D3/00 ,  H04L27/14 ,  H04L27/148 ,  H04L27/152 ,  H04B1/16

    CPC分类号： H03D3/006 ,  H03D3/00 ,  H03D3/001 ,  H03D2200/0045 ,  H03D2200/0054 ,  H04B1/1646 ,  H04L27/14 ,  H04L27/148 ,  H04L27/152

    摘要： Methods, systems, and devices are described for an adaptive demodulator that supports multiple modes. An FM signal may be received at a demodulator and parameters corresponding to the FM signal may be identified. Connections between multiple modules within the demodulator may be configured, based at least in part on the parameters, to select one of multiple demodulation modes supported by the demodulator to demodulate the FM signal. The modes may include a phase differencing mode, a phase-locked loop (PLL) mode, a frequency-compressive feedback (FCF) mode, and/or a quadrature detector mode. The parameters may include one or both of a signal strength of the FM signal and a maximum frequency deviation of the FM signal. Based on the parameters, one or more signals may be generated to configure the connections within the demodulator. A switch from one mode to another may occur when one of the parameters breaches a threshold value.

    摘要翻译： 为支持多种模式的自适应解调器描述了方法，系统和设备。 可以在解调器处接收FM信号，并且可以识别与FM信号对应的参数。 至少部分地基于参数，解调器内的多个模块之间的连接可以被配置为选择由解调器支持的多个解调模式之一以解调FM信号。 这些模式可以包括相位差分模式，锁相环（PLL）模式，频率 - 压缩反馈（FCF）模式和/或正交检测器模式。 参数可以包括FM信号的信号强度和FM信号的最大频率偏差中的一个或两个。 基于这些参数，可以生成一个或多个信号来配置解调器内的连接。 当其中一个参数违反阈值时，可能会发生从一种模式切换到另一种模式的切换。

    ANALOG AND AUDIO MIXED-SIGNAL FRONT END FOR 4G/LTE CELLULAR SYSTEM-ON-CHIP
    7.
    发明申请
    ANALOG AND AUDIO MIXED-SIGNAL FRONT END FOR 4G/LTE CELLULAR SYSTEM-ON-CHIP 有权
    用于4G / LTE蜂窝系统芯片的模拟和音频混合信号前端

    公开(公告)号：US20150194979A1

    公开(公告)日：2015-07-09

    申请号：US14586866

    申请日：2014-12-30

    申请人： Broadcom Corporation

    发明人： Xicheng JIANG ,  Xinyu YU ,  Fang LIN ,  Yee Ling CHEUNG ,  Michael INERFIELD

    IPC分类号： H03M1/18 ,  H04M1/02 ,  H04B1/40 ,  H03M1/66

    CPC分类号： H03M1/185 ,  H03M1/66 ,  H04B1/0003 ,  H04B1/1646 ,  H04B1/40 ,  H04M1/0202

    摘要： A CMOS analog and audio front-end circuit includes an enhanced analog-to-digital converter (ADC) that achieves a desired signal-to-noise-and-distortion (SNDR) and an analog-front-end transmit (TX) digital-to-analog converter (DAC). The enhanced ADC includes an improved single Op-Amp resonator coupled to a feed-forward loop and can substantially reduce signal transfer function (STF) peaking of the enhanced ADC. The CMOS analog and audio front-end circuit is integrated with a baseband processor.

    摘要翻译： CMOS模拟和音频前端电路包括增强的模数转换器（ADC），其实现期望的信噪比失真（SNDR）和模拟前端发送（TX）数字 - 模数转换器（DAC）。 增强型ADC包括耦合到前馈环路的改进的单个运算放大器，可以显着降低增强型ADC的信号传递函数（STF）峰值。 CMOS模拟和音频前端电路与基带处理器集成在一起。

    FM RECEIVER WITH FREQUENCY DEVIATION-DEPENDENT ADAPTIVE CHANNEL FILTER
    8.
    发明申请
    FM RECEIVER WITH FREQUENCY DEVIATION-DEPENDENT ADAPTIVE CHANNEL FILTER 审中-公开
    FM接收机与频偏相关的自适应信道滤波器

    公开(公告)号：US20150133069A1

    公开(公告)日：2015-05-14

    申请号：US14080551

    申请日：2013-11-14

    申请人： QUALCOMM Incorporated

    发明人： Eunmo Kang ,  Yossef Tsfaty ,  Le Nguyen Luong

    IPC分类号： H04B1/12 ,  H04L27/14

    CPC分类号： H04L27/14 ,  H04B1/1646

    摘要： Methods, systems, and devices are described for wireless communications in a frequency modulation (FM) receiver with a frequency deviation-dependent adaptive channel filter. A maximum frequency deviation of an FM broadcast signal may be estimated. One or more coefficients of a channel filter may be adapted based at least in part on the maximum frequency deviation. The coefficient adaptation may include identifying a set of coefficients corresponding to the maximum frequency deviation and applying the set of coefficients to the channel filter. The set of coefficients may be identified by selecting one of multiple sets of coefficients stored in memory. In some instances, a signal quality metric (e.g., signal-to-noise ratio (SNR)) may be identified and may be used to modify a value of one or more of the set of coefficients applied to the channel filter.

    摘要翻译： 对具有频偏偏移自适应信道滤波器的频率调制（FM）接收机中的无线通信描述了方法，系统和设备。 可以估计FM广播信号的最大频率偏差。 可以至少部分地基于最大频率偏差来适应信道滤波器的一个或多个系数。 系数自适应可以包括识别对应于最大频率偏差的一组系数，并将该组系数应用于信道滤波器。 可以通过选择存储在存储器中的多组系数中的一组来识别系数集合。 在一些情况下，可以识别信号质量度量（例如，信噪比（SNR）），并且可以用于修改施加到信道滤波器的系数集合中的一个或多个的值。

    Radio broadcast receiver
    9.
    发明授权
    Radio broadcast receiver 有权
    无线电广播接收机

    公开(公告)号：US08417179B2

    公开(公告)日：2013-04-09

    申请号：US13002667

    申请日：2009-04-30

    申请人： Kyota Watanabe

    发明人： Kyota Watanabe

    IPC分类号： H04H40/00

    CPC分类号： H04B1/1646 ,  H04B1/406 ,  H04H20/22 ,  H04H40/18

    摘要： A radio broadcast receiver includes a broadcast reception and reproduction unit 1 for outputting a digital sound when being able to receive a digital signal included in a terrestrial digital radio broadcast, and for outputting an analog sound when being unable to receive the digital signal, and a control unit 3 for determining the broadcast type of the digital terrestrial broadcast received by the broadcast reception and reproduction unit 1 to carry out variable control of a transition time required to switch from an output of the analog sound to an output of the digital sound according to the determined broadcast type.

    摘要翻译： 无线电广播接收机包括广播接收和再现单元1，用于当能够接收包括在地面数字无线电广播中的数字信号时输出数字声音，并且用于当不能接收数字信号时输出模拟声音，并且 控制单元3，用于确定由广播接收和再现单元1接收的数字地面广播的广播类型，以执行根据模拟声音的输出切换到数字声音的输出所需的转换时间的可变控制，根据 确定广播类型。