Patent ID: 7609277

Claim:
A method performed by a dithering device to reduce the size of a pixel, the method comprising: determining by the dithering device a dither addend for a color component of the pixel based on a frame number of a frame comprising the pixel by determining a filter value as the frame number modulo a number of dither addend formulas available for determining dither addends, and determining the dither addend based on a dither addend formula of the dither addend formulas selected using the filter value; adding the dither addend to the color component; and rounding the color component to reduce a size of the color; and wherein when the number of dither addend formulas is four, if the frame number modulo four is zero, the dither addend is a binary value determined based on a first dither addend formula, if the frame number modulo four is one, the dither addend is a binary value determined based on a second dither addend formula, if the frame number modulo four is two, the dither addend is a binary value determined based on a third dither addend formula, and if the frame number modulo four is three, the dither addend is a binary value determined based on a fourth digital addend formula.