Development of a crosstalk measurement type three-dimensional digital color decoder

A three-dimensional digital color decoder system that converts composite NTSC or PAL video signals into cross color-free high picture quality digital video signals is described. In this system, the Y/C crosstalk is measured by means of three-dimensional filters which the authors have devised to adaptively control the three-dimensional Y/C separation filters. The algorithm is realized as hardware, and the picture quality is improved by a rank of 1.5 at a slight distance of 4H over the conventional three-dimensional digital color decoders when various composite color video signals including still images, slowly moving images, and moving circular zone plates are input