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公开(公告)号：US5838600A
公开(公告)日：1998-11-17
申请号：US912795
申请日：1997-08-18
CPC分类号： H04N7/01
摘要： A filtering circuit suitable for use in a video sample rate converter provides a constant direct current (DC) gain irrespective of realization errors, and reduces hardware requirements. The circuit includes an input terminal for receiving an input signal. A first delay unit delays the input signal to generate a first delayed signal. A subtracting unit subtracts the input signal from the first delayed signal to generate a difference signal. A second delay unit delays the difference signal to generate a second delayed signal. A reference delay unit delays the first delayed signal by a predetermined reference time period to generate a reference signal. A filtering unit filters the second delayed signal to generate a filtered signal. An adding unit adds the reference signal to the filtered signal to generate an output signal. The circuit can be modified to include a multiplication unit for multiplying the input signal, the first delayed signal or the output signal by a given constant to obtain a desired direct current (DC) gain. According to at least one preferred embodiment, the filtering unit is constructed as a finite impulse response (FIR) filter. According to another embodiment, the filtering unit is constructed as an infinite impulse response (IIR) filter.
摘要翻译： 适用于视频采样率转换器的滤波电路提供恒定的直流（DC）增益，而不考虑实现误差，并降低硬件要求。 该电路包括用于接收输入信号的输入端。 第一延迟单元延迟输入信号以产生第一延迟信号。 减法单元从第一延迟信号中减去输入信号以产生差分信号。 第二延迟单元延迟差分信号以产生第二延迟信号。 参考延迟单元将第一延迟信号延迟预定的参考时间段以产生参考信号。 滤波单元对第二延迟信号进行滤波以产生滤波信号。 加法单元将参考信号添加到滤波信号以产生输出信号。 电路可以被修改为包括用于将输入信号，第一延迟信号或输出信号乘以给定常数的乘法单元，以获得期望的直流（DC）增益。 根据至少一个优选实施例，滤波单元被构造为有限脉冲响应（FIR）滤波器。 根据另一实施例，滤波单元被构造为无限脉冲响应（IIR）滤波器。
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公开(公告)号：US08503696B2
公开(公告)日：2013-08-06
申请号：US12085135
申请日：2005-11-16
申请人： Paul Gothard Knutson , Jun Li
发明人： Paul Gothard Knutson , Jun Li
IPC分类号： H03G5/00
摘要： An electronic apparatus such as an audio apparatus, television signal receiver, or other apparatus provides an equalizer interface that enables equalizer settings to be adjusted via acoustic user feedback. According to an exemplary embodiment, the electronic apparatus includes a sound generator for generating a first tone for a first frequency band. A processor enables a user to adjust a first volume level of the first tone. A memory stores the first volume level for the first frequency band. A volume controller applies the first volume level to output signals in the first frequency band.
摘要翻译： 诸如音频设备，电视信号接收机或其他设备的电子设备提供均衡器接口，其使均衡器设置能够通过声学用户反馈进行调整。 根据示例性实施例，电子设备包括用于产生用于第一频带的第一音调的声音发生器。 处理器使得用户能够调整第一音调的第一音量电平。 存储器存储第一频带的第一音量电平。 音量控制器将第一音量电平应用于第一频带中的输出信号。
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公开(公告)号：US20130108275A1
公开(公告)日：2013-05-02
申请号：US13808316
申请日：2010-07-07
CPC分类号： H04B10/1143 , G08C19/16 , G08C2201/71 , H04N5/4403 , H04N21/42225 , H04N21/4882
摘要： A remote control unit generates a first beam which a user points at one of a plurality of information appliances to select that appliance. After selecting the desired appliance, the user then actuates a button on a control keypad on the remote control unit to cause the unit to generate a second, modulated beam. The remote control unit modulates the second beam in accordance with a desired functionality of the information appliance to control the appliance accordingly.
摘要翻译： 远程控制单元生成用户指向多个信息设备之一以选择该设备的第一波束。 在选择所需的设备之后，用户然后启动遥控单元上的控制键盘上的按钮，使单元产生第二调制波束。 远程控制单元根据信息设备的所需功能来调制第二个波束，从而相应地控制设备。
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公开(公告)号：US20090174823A1
公开(公告)日：2009-07-09
申请号：US12085135
申请日：2005-11-16
申请人： Paul Gothard Knutson , Jun Li
发明人： Paul Gothard Knutson , Jun Li
摘要： An electronic apparatus such as an audio apparatus, television signal receiver, or other apparatus provides an equalizer interface that enables equalizer settings to be adjusted via acoustic user feedback. According to an exemplary embodiment, the electronic apparatus includes a sound generator for generating a first tone for a first frequency band. A processor enables a user to adjust a first volume level of the first tone. A memory stores the first volume level for the first frequency band. A volume controller applies the first volume level to output signals in the first frequency band.
摘要翻译： 诸如音频设备，电视信号接收机或其他设备的电子设备提供均衡器接口，其使均衡器设置能够通过声学用户反馈进行调整。 根据示例性实施例，电子设备包括用于产生用于第一频带的第一音调的声音发生器。 处理器使得用户能够调整第一音调的第一音量电平。 存储器存储第一频带的第一音量电平。 音量控制器将第一音量电平应用于第一频带中的输出信号。
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公开(公告)号：US06959055B2
公开(公告)日：2005-10-25
申请号：US10206690
申请日：2002-07-26
CPC分类号： H03G3/3052 , H03G3/3089
摘要： An apparatus and method for automatic gain control in spread-spectrum communications includes an automatic gain control apparatus for a spread-spectrum receiver, including a received signal strength indicator, an analog amplifier in signal communication with the received signal strength indicator, an analog-to-digital converter in signal communication with the analog amplifier, a digital automatic gain control loop in signal communication with the analog-to-digital converter, and a digital-to-analog converter in signal communication with the digital automatic gain control loop for providing a signal indicative of a digital gain to the analog amplifier; where the corresponding method for automatic gain control in spread-spectrum communications includes receiving an analog signal, measuring the strength of the received analog signal, deriving a first analog gain in correspondence with the measured strength, applying the derived first analog gain to an analog amplifier, deriving a second analog gain from a pilot channel signal within an automatic gain control loop, deriving a digital gain from the pilot channel signal within the automatic gain control loop, and applying an automatic gain control signal indicative of the second analog gain and the digital gain to the analog amplifier.
摘要翻译： 用于扩频通信中的自动增益控制的装置和方法包括用于扩频接收机的自动增益控制装置，包括接收信号强度指示器，与接收信号强度指示器进行信号通信的模拟放大器，模拟到 与模拟放大器进行信号通信的数字转换器，与模数转换器进行信号通信的数字自动增益控制回路，以及与数字自动增益控制回路进行信号通信的数模转换器，用于提供 指示到模拟放大器的数字增益的信号; 其中用于扩频通信中的自动增益控制的相应方法包括接收模拟信号，测量接收的模拟信号的强度，根据测得的强度导出第一模拟增益，将得到的第一模拟增益应用于模拟放大器 从自动增益控制环路内的导频信道信号导出第二模拟增益，从自动增益控制环路内的导频信道信号导出数字增益，以及应用表示第二模拟增益的自动增益控制信号和数字 增益到模拟放大器。
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46.发明授权Retrieving stored data from a base unit of a multi-line wireless phone system 失效从多线无线电话系统的基本单元检索存储的数据公开(公告)号：US06904031B1
公开(公告)日：2005-06-07
申请号：US09581193
申请日：1998-09-01
CPC分类号： H04M1/72502
摘要： A wireless telephone system comprises a base unit and a plurality of wireless handsets. The base unit has a base transceiver and a memory for storing stored information. Each handset has a handset transceiver for establishing a data link and an audio link with the base unit via the base transceiver, wherein the data link is for transmitting signaling information and the audio link is for transmitting voice data for a real-time telephone call. The handset requests from the base unit certain stored information. In response, the base unit retrieves the requested stored information from the memory and transmits the stored information to the handset via the audio link.
摘要翻译： 无线电话系统包括基本单元和多个无线手机。 基本单元具有基本收发器和用于存储存储的信息的存储器。 每个手机具有用于通过基站收发器与基站建立数据链路和音频链路的手持机收发器，其中数据链路用于发送信令信息，音频链路用于发送用于实时电话呼叫的语音数据。 手机从基本单元请求某些存储的信息。 作为响应，基本单元从存储器检索请求的存储信息，并经由音频链路将所存储的信息发送到手持机。
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公开(公告)号：US06621857B1
公开(公告)日：2003-09-16
申请号：US09476641
申请日：1999-12-31
IPC分类号： H04B1707
CPC分类号： H04L27/2332 , H04L2027/003 , H04L2027/0053 , H04L2027/0069
摘要： A wireless telephone system comprises a base transceiver having a base receiver and a plurality of wireless handsets. Each handset comprises a handset transceiver for establishing a DSSS link over a shared channel with the base unit via the base transceiver. Each receiver the base transceiver and the handset transceivers receives a spread-spectrum signal representing symbol data from a transmitter of the system, where each such receiver comprises a derotator that derotates the spread-spectrum signal in accordance with a counter-rotating signal to provide a derotated signal; a correlator for receiving the derotated signal and for providing output symbol data based on the derotated signal; a carrier tracking loop (CTL) phase error estimator for receiving the output symbol data and for generating a CTL phase error signal based upon the rotation of the spread-spectrum signal; and a CTL for generating the counter-rotating signal based on the CTL phase error signal.
摘要翻译： 无线电话系统包括具有基站接收机和多个无线手机的基站收发器。 每个手机包括手持机收发器，用于通过基本收发器与基本单元在共享信道上建立DSSS链路。 基站收发机和手持收发机的每个接收机从系统的发射机接收表示符号数据的扩频信号，其中每个这样的接收机包括一个反转器，该解旋转器根据反向旋转信号来消除扩展频谱信号， 消旋信号; 相关器，用于接收解旋信号，并用于基于解旋信号提供输出符号数据; 载波跟踪环路（CTL）相位误差估计器，用于接收输出符号数据并根据扩频信号的旋转产生CTL相位误差信号; 以及用于基于CTL相位误差信号产生反向旋转信号的CTL。
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48.发明授权Receiver with parallel correlator for acquisition of spread spectrum digital transmission 有权具有并行相关器的接收机，用于采集扩频数字传输公开(公告)号：US06590872B1
公开(公告)日：2003-07-08
申请号：US09176182
申请日：1998-10-21
IPC分类号： H04Q700
CPC分类号： H04B1/709 , H04B1/7085 , H04L7/0029 , H04L2025/03668
摘要： A receiver of a handset transceiver, in a wireless telephone system having a plurality of wireless handset and a base unit having a base transceiver. Each handset has a handset transceiver for establishing a time-division multiple access (TDMA) link over a shared channel with the base unit via the base transceiver, in which each handset communicates during an exclusive time slot of a TDMA scheme that allocates time slots to handsets during an exclusive time slot of a TDMA scheme that allocates time slots to active handsets for receiving a spread spectrum signal comprising successive chips representing successive symbols. Each receiver has one or more demodulation loops for demodulating the received spread spectrum signal, wherein each demodulation loop is characterized by one or more demodulation loop parameters. A parallel correlator of the receiver detects a peak bin and provides the peak bin and two adjacent bins. An error estimator of the receiver adjusts the demodulation parameters in accordance with the peak bin and the two adjacent bins to optimize demodulation of the spread spectrum signal.
摘要翻译： 在具有多个无线手机的无线电话系统和具有基地收发信机的基站单元的手持收音机的接收机中。 每个手机具有手持机收发器，用于经由基站收发器通过基本单元在共享信道上建立时分多址（TDMA）链路，其中每个手机在分配时隙的TDMA方案的专用时隙期间进行通信 在TDMA方案的专用时隙中的手机，其向有源手机分配时隙以接收包括表示连续符号的连续码片的扩频信号。 每个接收机具有用于解调所接收的扩展频谱信号的一个或多个解调回路，其中每个解调循环由一个或多个解调循环参数表征。 接收机的并行相关器检测峰值仓，并提供峰值仓和两个相邻的仓。 接收机的误差估计器根据峰仓和两个相邻的箱来调整解调参数，以优化扩频信号的解调。
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49.发明授权公开(公告)号：US06574769B1
公开(公告)日：2003-06-03
申请号：US09581192
申请日：2000-11-15
IPC分类号： H03M1300
CPC分类号： H04L1/0083 , H04L1/0009 , H04L1/0014 , H04L1/0025 , H04L1/0071 , H04L1/0079
摘要： A wireless telephone system comprising a base unit coupleable to one or more external telephone lines and having a base transceiver, and at least one wireless handset. The wireless handset has a handset transceiver for establishing a digital link with the base unit via the base transceiver over a wireless channel, wherein the handset and base unit communicate via the digital link by fixed-size audio packets comprising a plurality of audio data samples and a plurality of error correction bits. Qualities of the digital link are monitored to determine whether a change in error rate occurs. In response to the determination, a packet structure of subsequent audio packets is changed from a first packet structure to a second packet structure to change the relative number of bits devoted to audio data samples and to error correction bits.
摘要翻译： 一种无线电话系统，包括可耦合到一个或多个外部电话线并具有基本收发器的基本单元以及至少一个无线手机。 无线手机具有手机收发器，用于通过无线信道经由基站收发器建立与基本单元的数字链路，其中手持机和基站单元经由数字链路通过包括多个音频数据样本的固定大小的音频分组进行通信， 多个纠错位。 监视数字链路的质量，以确定是否发生错误率的变化。 响应于该确定，后续音频分组的分组结构从第一分组结构改变为第二分组结构，以改变专用于音频数据样本的比特的相对数目和纠错比特。
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公开(公告)号：US06370160B1
公开(公告)日：2002-04-09
申请号：US09222465
申请日：1998-12-29
IPC分类号： H04J306
CPC分类号： H04W56/0085 , H04W92/10
摘要： A wireless telephone system and related method are described, the system having a plurality of wireless handsets and a base unit, the base unit having a base transceiver, each handset having a handset transceiver for establishing a wireless link over a shared channel with the base unit via the base transceiver. The base unit transmits a signal comprising a current packet of a plurality of packets of an epoch. Each handset transceiver has a receiver having a parallel correlator for generating timing error signals and end-of-packet signals for the signal, and a timing loop for receiving the timing error signals and for establishing symbol-level timing synchronization. An enable resynch gate of the receiver receives the end-of-packet signals from the parallel correlator to establish packet-level synchronization, and a de-packetizer of the receiver reads epoch location information from the current packet which identifies the location of the current packet within the epoch. A counter of the receiver receives the epoch location from the de-packetizer and establishes epoch-level synchronization.
摘要翻译： 描述了无线电话系统和相关方法，该系统具有多个无线手机和基本单元，该基本单元具有基本收发器，每个手机具有用于通过共享信道与基本单元建立无线链路的手持收音机 通过基地收发器。 基本单元发送包括时期的多个分组的当前分组的信号。 每个手持机收发器具有一个具有并行相关器的接收机，用于产生用于信号的定时误差信号和分组结束信号，以及用于接收定时误差信号和建立符号级定时同步的定时回路。 接收器的使能再同步接收器从并行相关器接收分组结束信号，以建立分组级同步，并且接收器的去分组器从当前分组读取识别当前分组的位置的当前分组信息 在时代之内。 接收器的计数器从解包器接收时代位置并建立时代级同步。
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