Patent ID: 7129957
Filing Date: 2006-10-31
Classification: H04N

Abstract:
1. A color signal processing device, comprising: a display unit; a luminance_color difference signal conversion unit converting an input image signal into a luminance_color difference signal; a change rate detection unit detecting a change rate of a color difference signal when the color difference signal changes with hue and luminance remaining constant in a color space of the luminance_color difference signal; an RGB color signal conversion unit converting the luminance_color difference signal into an RGB color signal, wherein the display unit displays the RGB color signal; a detection unit detecting the RGB color signal changing in a color space of the RGB color signal according to the changes of the color difference signal; and a color gamut decision unit determining a color chroma scope based on a change rate of the RGB color signal according to the change rate of the color difference signal when the detected RGB color signal exists on a color space boundary of the RGB color signal and displaying the color chroma scope on the display unit.