Favorite color correction for reference color

In a TV system, the viewer can adjust the color control at the receiver for optimal color reproduction, but frequent incorrect color adjustment is the most common problem experienced by the viewer. Another problem for the viewer is that there is not a reference color to compare the reproduced colors. In this paper, we propose a favorite color correction circuit which represents the favorite color to the viewer on demand. The proposed circuit reproduces flesh tone which is widely used as a reference color in the TV system; blue color which is directly related to tri-stimulus values; and green color which has higher visual sensitivity. In the proposed algorithm, the variation range of phase detector output voltage was minimized for the favorite color saturation changes and also the color signal phase is readjusted from the color burst signal. Thus, the favorite color was easily detected from the other colors without overlapping of the correction range and it provides reference color to the viewer.