RESOLUTION OF SATURATED COLOR TELEVISION PICTURE - COLOR MTF OF VISION AND IMPROVEMENT OF NTSC SIGNAL.

Abstract

The modulation transfer function (MTF) of the blue receptor in the retina was found to have a narrower bandwidth compared with red and green receptors. However, blue light of a color CRT exites not only blue cones but also red and green cones because blue light has a wide spectrum range. Thus the MTF characteristics of vision for each three primary colors on a CRT become equal. This paper presents a new method such that high frequency components of a color difference signal are added to a luminance signal in order to correct the resolution. It was applied to the National Television System Committee (NTSC) color TV system and its effectiveness was confirmed.