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公开(公告)号：US07801311B2
公开(公告)日：2010-09-21
申请号：US11227357
申请日：2005-09-15
CPC分类号： H04S1/00 , H04B1/1676
摘要： A stereo decoder includes a first digital filter for producing a first filtered composite audio signal and a second digital filter for producing a second filtered composite audio signal. A sum/difference network produces a left channel signal and a right channel signal. A processor executes operational instructions that calculate a first corner frequency of a first digital filter based on a signal quality of the FM signal, calculate a first set of filter coefficients for the first digital filter based on the first corner frequency and an approximation of a filter transform, calculate a second corner frequency of a second digital filter based on the signal quality, and calculate a second set of filter coefficients for the second digital filter, based on the second corner frequency and the approximation of the filter transform.
摘要翻译： 立体声解码器包括用于产生第一滤波复合音频信号的第一数字滤波器和用于产生第二滤波复合音频信号的第二数字滤波器。 和/差网络产生左声道信号和右声道信号。 处理器执行操作指令，其基于FM信号的信号质量来计算第一数字滤波器的第一转角频率，基于第一转角频率和滤波器的近似计算第一数字滤波器的第一组滤波器系数 基于信号质量计算第二数字滤波器的第二转角频率，并且基于第二转角频率和滤波器变换的近似来计算第二数字滤波器的第二组滤波器系数。
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2.发明授权公开(公告)号：US07460847B2
公开(公告)日：2008-12-02
申请号：US11217763
申请日：2005-09-01
CPC分类号： H03G3/3052 , H04B17/20 , H04B17/318
摘要： A radio receiver, optionally used in conjunction with a handheld audio system, includes a radio stage for processing a received radio signal into an audio signal. An audio stage produces an audio output, based on the audio signal. An overload monitor detects an overload condition in the radio stage and generates an overload signal in response to the detected overload condition. A controller controls the audio output in response to the overload signal.
摘要翻译： 可选地与手持音频系统一起使用的无线电接收机包括用于将接收的无线电信号处理成音频信号的无线电台。 音频级基于音频信号产生音频输出。 过载监视器检测无线电级中的过载状况，并根据检测到的过载条件产生过载信号。 控制器响应于过载信号控制音频输出。
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公开(公告)号：US20090015714A1
公开(公告)日：2009-01-15
申请号：US11825841
申请日：2007-07-09
IPC分类号： H04N7/00
CPC分类号： H04N5/60 , H04N7/06 , H04N21/4394 , H04N21/4396
摘要： A system and method for demodulating signals are disclosed. In a particular embodiment, the method includes receiving a signal at an input and determining a first noise estimate of the signal. The method also includes providing a first output indicating a second noise estimate of the signal at a primary carrier frequency and providing a second output indicating a third noise estimate of the signal at a secondary carrier frequency.
摘要翻译： 公开了一种用于解调信号的系统和方法。 在特定实施例中，该方法包括在输入处接收信号并确定信号的第一噪声估计。 该方法还包括提供指示在主载波频率处的信号的第二噪声估计的第一输出，并提供指示辅助载波频率处的信号的第三噪声估计的第二输出。
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公开(公告)号：US20140323074A1
公开(公告)日：2014-10-30
申请号：US14330484
申请日：2014-07-14
申请人： Jon David Hendrix , Michael R. May
发明人： Jon David Hendrix , Michael R. May
CPC分类号： H04B1/1607 , H03G3/20 , H04B1/1018 , H04W52/0245 , Y02D70/00
摘要： A method for managing power of a battery powered handheld audio device by receiving an indicia of signal quality for a received continuous-time radio signal. The method compares the indicia of signal quality to a signal threshold. Upon a favorable comparison, enacting a first analog signal conditioning setting. Upon an unfavorable comparison, enacting a second analog signal conditioning setting. The method further provides, upon the favorable comparison, disabling a digital filtering operation, and upon the unfavorable comparison, enabling the digital filtering operation.
摘要翻译： 一种用于通过接收对所接收的连续时间无线电信号的信号质量的标记来管理电池供电的手持音频设备的电力的方法。 该方法将信号质量的标记与信号阈值进行比较。 在有利的比较下，颁布第一个模拟信号调节设置。 在不利的比较下，执行第二模拟信号调节设置。 该方法进一步提供了有利的比较，禁用数字滤波操作，并且在不利的比较中，实现数字滤波操作。
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公开(公告)号：US08477248B2
公开(公告)日：2013-07-02
申请号：US11825841
申请日：2007-07-09
CPC分类号： H04N5/60 , H04N7/06 , H04N21/4394 , H04N21/4396
摘要： A system and method for demodulating signals are disclosed. In a particular embodiment, the method includes receiving a signal at an input and determining a first noise estimate of the signal. The method also includes providing a first output indicating a second noise estimate of the signal at a primary carrier frequency and providing a second output indicating a third noise estimate of the signal at a secondary carrier frequency.
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公开(公告)号：US08811929B2
公开(公告)日：2014-08-19
申请号：US11265867
申请日：2005-11-03
申请人： Jon David Hendrix , Michael R. May
发明人： Jon David Hendrix , Michael R. May
IPC分类号： H04B1/16
CPC分类号： H04B1/1607 , H03G3/20 , H04B1/1018 , H04W52/0245 , Y02D70/00
摘要： A method for managing power of a battery-powered handheld audio device by receiving an indicia of signal quality for a received continuous-time radio signal. The method compares the indicia of signal quality to a signal quality threshold. Upon a favorable comparison, enacting a first analog signal conditioning setting. Upon an unfavorable comparison, enacting a second analog signal conditioning setting. The method further provides, upon the favorable comparison, disabling a digital filtering operation, and upon the unfavorable comparison, enabling the digital filtering operation.
摘要翻译： 一种用于通过接收所接收的连续时间无线电信号的信号质量标记来管理电池供电的手持音频设备的电力的方法。 该方法将信号质量的标记与信号质量阈值进行比较。 在有利的比较下，颁布第一个模拟信号调节设置。 在不利的比较下，执行第二模拟信号调节设置。 该方法进一步提供了有利的比较，禁用数字滤波操作，并且在不利的比较中，实现数字滤波操作。
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公开(公告)号：US07620380B2
公开(公告)日：2009-11-17
申请号：US11388795
申请日：2006-03-24
申请人： Jon David Hendrix , Michael R. May
发明人： Jon David Hendrix , Michael R. May
IPC分类号： H04B1/06
CPC分类号： H04B1/28
摘要： A method for adjusting automatic gain control (AGC) of a radio receiver begins when a primary AGC module establishes an AGC setting for the radio receiver to produce a primary AGC setting. The method continues when a supervisory AGC module compares performance of the radio receiver utilizing the primary AGC setting with a plurality of performance thresholds. The method continues with the supervisory AGC module adjusting the primary AGC setting to produce adjusted AGC setting when the performance of the radio receiver utilizing the primary AGC setting compares unfavorable with a first performance threshold of the plurality of performance thresholds. The method continues with the supervisory AGC module overwriting the primary AGC setting with alternative AGC setting when the performance of the radio receiver utilizing the primary AGC setting compares unfavorable with a second performance threshold of the plurality of performance thresholds.
摘要翻译： 一种用于调整无线电接收机的自动增益控制（AGC）的方法，当主AGC模块建立无线电接收机的AGC设置以产生主AGC设置时，开始。 当监控AGC模块使用主AGC设置与多个性能阈值比较无线电接收机的性能时，继续该方法。 当使用主AGC设置的无线电接收机的性能与多个性能阈值的第一性能阈值不利时相比较时，继续监视AGC模块调整主AGC设置以产生调整的AGC设置。 当使用主AGC设置的无线电接收机的性能与多个性能阈值的第二性能阈值相比较时，该方法继续，监控AGC模块用替代的AGC设置覆盖主AGC设置。
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8.发明授权公开(公告)号：US07227478B1
公开(公告)日：2007-06-05
申请号：US11302761
申请日：2005-12-14
申请人： Jon David Hendrix , Michael R. May
发明人： Jon David Hendrix , Michael R. May
IPC分类号： H03M7/00
CPC分类号： H03H17/0628
摘要： A sample rate converter includes an up-conversion module, a linear interpolator module, and a parameter control module. The up-conversion module is operable to convert a first data rate to a second data rate of a data signal. The linear interpolator module is operable to receive the data signal at the second data rate and to produce therefrom a data signal at a desired rate based on at least one parameter. The parameter control module is operable to produce the at least one parameter based on the desired rate.
摘要翻译： 采样率转换器包括上转换模块，线性内插器模块和参数控制模块。 上变换模块可操作以将第一数据速率转换为数据信号的第二数据速率。 线性内插器模块可操作以基于第二数据速率接收数据信号，并且基于至少一个参数以期望的速率从其产生数据信号。 参数控制模块可操作以基于期望速率产生至少一个参数。
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9.发明申请公开(公告)号：US20070058675A1
公开(公告)日：2007-03-15
申请号：US11222535
申请日：2005-09-09
申请人： Jon David Hendrix
发明人： Jon David Hendrix
IPC分类号： H04J3/22
摘要： Digital data is conveyed over a channel having a frame rate greater than the data rate of the digital data. The digital data is produced at the data rate. From frame to frame, determining whether a digital data sample is available. When the sample of the digital data is available, transmitting, in a current allocated transmission slot of a frame, the sample of the digital data. When the sample of the digital data is not available, transmitting, in the current allocated transmission slot, a predetermined value.
摘要翻译： 数字数据通过具有大于数字数据的数据速率的帧速率的信道传送。 数字数据以数据速率生成。 从帧到帧，确定数字数据样本是否可用。 当数字数据的样本可用时，在当前分配的帧的传输时隙中发送数字数据的采样。 当数字数据的采样不可用时，在当前分配的传输时隙中发送预定值。
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