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    • 5. 发明授权
    • Vestigial side band synchronization signal detection circuit
    • 残留边带同步信号检测电路
    • US07433438B2
    • 2008-10-07
    • US10767734
    • 2004-01-30
    • Won-Kyu PaikDong-Jo Kim
    • Won-Kyu PaikDong-Jo Kim
    • H04L7/00
    • H04N5/08
    • A vestigial side band (VSB) synchronization (sync) signal detection circuit and method of generating a VSB sync signal is described. The circuit may include means for generating a first control signal related to sync signal generation, based on receipt of a selected one of an input first data signal and input second data signal, and means for generating a position signal containing information regarding positions of a next field sync and segment sync signals. The circuit may also include a correlator for generating a sign signal to determine a sign of the field sync signal, and a generator for generating a plurality of distinct types of sync signals based on the control signal, position signal and sign signal.
    • 描述了残留边带(VSB)同步(sync)信号检测电路和产生VSB同步信号的方法。 电路可以包括用于基于接收到输入的第一数据信号和输入的第二数据信号中所选择的一个产生与同步信号产生相关的第一控制信号的装置,以及用于生成包含关于下一个的位置的信息的位置信号的装置 场同步和段同步信号。 电路还可以包括用于产生符号信号以确定场同步信号的符号的相关器,以及用于基于控制信号,位置信号和符号信号产生多个不同类型的同步信号的发生器。
    • 6. 发明授权
    • Digital television receiver with automatic gain control unit and method
    • 具有自动增益控制单元和方法的数字电视接收机
    • US07271852B2
    • 2007-09-18
    • US10659591
    • 2003-09-10
    • Won-Kyu PaikDo-Han Kim
    • Won-Kyu PaikDo-Han Kim
    • H04N5/44H04B7/00
    • H04N5/52H03G3/3068H04N5/4401H04N21/44209
    • An automatic gain controller (AGC) and method for use in a digital TV receiver having an IF amplifier, an RF amplifier, an analog to digital converter (ADC) connected to the IF amplifier, and a demodulator connected to the ADC, the AGC comprising: an input selector for selecting as feedback signal one of a digitized IF signal output of the ADC and a demodulated signal output of the demodulator; a signal detection unit for detecting the conditions of the feedback signal and outputting status signals; and a traffic controller for receiving the status signals and outputting control signals based on the status signals to an IF gain controller and an RF gain controller for independent gain control of the RF amplifier and the IF amplifier. The AGC and method further including hysteresis-curve-based switching for alternatively halting adjustments to IF gain while adjusting RF gain or halting adjustments to RF gain while adjusting IF gain.
    • 一种在具有连接到IF放大器的IF放大器,RF放大器,模数转换器(ADC)的数字TV接收机中使用的自动增益控制器(AGC)和方法,以及连接到ADC的解调器,AGC包括 :输入选择器,用于选择ADC的数字化IF信号输出和解调器的解调信号输出之一作为反馈信号; 信号检测单元,用于检测反馈信号的状态并输出状态信号; 以及业务控制器,用于接收状态信号并根据状态信号向IF增益控制器和RF增益控制器输出控制信号,用于RF放大器和IF放大器的独立增益控制。 AGC和方法还包括基于滞后曲线的切换,用于在调整IF增益的同时调整RF增益或停止对RF增益的调整,同时调整IF增益。