HDTV摄像机信号拾取方式的发展

为获得高分辨率，特别是获得高质量的亮度信号，高清晰度电视（ＨＤＴＶ）摄像机的信号拾取方式得到了发展，先后出现了双重绿色（ＤＧ）拾取方式和４－ＣＣＤ拾取方式。使用这些方法，可获得１０００电视线以上的高分辨率，并明显改善了亮度信号的质量。下文介绍这两种ＨＤＴＶ摄像机的新式拾取方式－ＤＧ方式和４－ＣＣＤ方式。同时，通过与Ｒ，Ｇ，Ｂ拾取方式的比较，讨论ＤＧ和－ＣＣＤ拾取方式的原理及特性。

Development of signal picking up in HDTV video camera

In order to obtain high definition, especially high quality lunminance signals,the methods of picking up signals in HDTV video cameras are developed, such as double-green(DG) and 4-CCD method appears one after another.With these methods, definition as high as 1000 TV lines can be obtained, and the quality of luminance signals is improved significantly. The Principles and characteristics of these two new methods are introduced in this paper and compared with RGB method.