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目前倍频扫描彩电的逐行精显只是针对N制节目而言,那么PAL制模拟彩电又如何实现精显呢?精显是指精密显像,主要通过各种手段提高模拟彩电单位面积内显示像素。要提高水平方向分辨率,只有提高信号通道频宽和减小显像管阴罩板的点距,与行、场扫描频率无直接关系。目前精显彩电中采用的倍频扫描方式都只能增加垂直分辨率,而提高垂直分辨率的前提是提高行频。在播放连续运动画面时,提高场频(或帧频)有利于克服快速移动画面的卡通效应,同时可以改善光闪烁感。目前世界各大彩电生产企业,除了提高模拟彩电视频通道带宽改善水平分辨率外,投入更多的是如何改善其垂直分辨率。由于多数彩电生产厂家对减小显像管的点距无
At present, the frequency doubling scan color TV line-by-line precision is only for the N system program, then the PAL analog color TV and how to achieve it? Fine is precision imaging, mainly through various means to improve analog TV unit area display Pixel. To improve the horizontal resolution, only to increase the signal channel width and reduce the CRT tube pitch, and line, field scan frequency is not directly related. At present, the frequency multiplication scanning method used in the fine color televisions can only increase the vertical resolution, and the premise of increasing the vertical resolution is to increase the horizontal frequency. When playing a continuous motion picture, increasing the field rate (or frame rate) is advantageous for overcoming the cartoon effect of fast moving pictures and improving the light flickering feeling. At present, the major color TV manufacturers in the world, in addition to improving the horizontal resolution of the bandwidth of analog color TV channels, have invested more in improving their vertical resolution. Because most color TV manufacturers to reduce the pitch of the picture tube without