Patent ID: 8466936

Claim:
A color gamut mapping method for multimedia equipment, the method performing color gamut mapping on a video signal received by the multimedia equipment and giving an output, wherein the video signal is in a first color gamut, while display light of the multimedia equipment is in a second color gamut, being characterized in that the color gamut mapping method for multimedia equipment comprises the steps of: converting the received video signal into a luminance signal and a chrominance signal, and calculating a two-dimensional lightness-chromaticity plane according to the luminance signal and the chrominance signal, wherein the two-dimensional plane intersects the first color gamut to obtain a first region and intersects the second color gamut to obtain a second region; and calculating location of a to-be-mapped point corresponding to the video signal in the first region according to the luminance signal and the chrominance signal of the video signal, and calculating a mapping point in the second region by making calculations on the to-be-mapped point to output a mapping point signal, wherein calculating the mapping point comprises: calculating points with the largest coordinates in the first region and the second region respectively and connecting the calculated points with a line, wherein a point where the line intersects the lightness axis is defined as an anchor point; drawing a line from the anchor point to the to-be-mapped point, which intersects a boundary of the first region at a first boundary point and intersects a boundary of the second region at a second boundary point, wherein a ratio of a distance between the anchor point and the second boundary point to that between the anchor point and the first boundary point is defined as a scale value; and deriving the mapping point by multiplying the to-be-mapped point with the scale value.