Patent ID: 7184053

Claim:
Method for processing RGB video picture data having a video (signal) level for display on a display device having a plurality of luminous elements corresponding to the colour components of pixels of a video picture, wherein a dithering method is applied to the video data to refine a grey-scale portrayal for displaying the video pictures, wherein, within the dithering method the input video data is converted to higher bit resolution and dithering numbers are added to the input video data in higher bit resolution, followed by a step with which the input video data is converted to final bit resolution, the dithering method including at least one of: (a) the dithering is made cell-based such that to each colour component R, G, B of a given pixel, and dependent on the identity of the colour component, a different dithering number from a dither pattern is added to each colour component of a given pixel, wherein the dither pattern comprises different dithering numbers from a set of dithering numbers; (b) the bit resolution of the dithering numbers is made dependent on a region/object in the video picture; and (c) the bit resolution of the dithering numbers is made dependent on the video (signal) level.