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2. 发明公开

EP0116424A1 Television receivers 失效
标题翻译：电视接收机
公开(公告)号：EP0116424A1
公开(公告)日：1984-08-22
申请号：EP84300448.2
申请日：1984-01-25
申请人： SONY CORPORATION
发明人： Matsuura, Katsuji , Evans, Christopher Neil
IPC分类号： H04N11/06
CPC分类号： H04N9/642
摘要： A television receiver comprises a sawtooth .generator (11) for generating sawtooth waves in dependence on a synchronizing'signal in an incoming positively or negatively modulated (such as SECAM or PAL respectively) composite video signal, a voltage detector (12) capable of generating an output waveform in response to the peak voltage of the sawtooth wave, during the field response period, the output waveform having a relatively high level or a relatively low level depending on the modulation polarity of the incoming video signal composite video signal, a smoothing circuit (13) for generating an output in response to the output waveform over the field period of the incoming video signal, and a switch driver (14) for effecting a control, such as video modulation polarity switching, in dependence on the output of the smoothing circuit (C13).
摘要翻译：一种电视接收机包括一个锯齿波发生器（11），用于根据输入正或负调制（例如SECAM或PAL）复合视频信号中的同步信号产生锯齿波，电压检测器（12），能够产生响应于锯齿波的峰值电压的输出波形，在场响应周期期间，取决于输入视频信号复合视频信号的调制极性，输出波形具有相对高的电平或相对低的电平;平滑电路（13），用于响应输入视频信号的场周期内的输出波形产生输出;以及开关驱动器（14），用于根据平滑的输出实现诸如视频调制极性切换的控制电路（C13）。

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