Patent ID: 8786627

Claim:
A video display apparatus comprising: a video processor which signal-processes an input video signal; and a video output unit which displays the signal-processed video signal on a display, wherein the video processor comprises: a first dithering unit which dithers the input video signal using a first mask; a color processor which color-processes the dithered video signal output from the first dithering unit; and a second dithering unit which dithers the color-processed video signal using a second mask related to the first mask, wherein the second dithering unit uses, as the second mask, a mask determined from among a plurality of predetermined masks according to the first mask used by the first dithering unit, wherein, in response to a first predetermined mask being selected, by the first dithering unit, as the first mask, a corresponding second predetermined mask is subsequently selected, by the second dithering unit, as the second mask according to the selection of the first predetermined mask, and wherein a sum of coefficients at a location corresponding to the first mask is equal to a sum of coefficients at a location corresponding to the second mask.