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US 8,786,627 B2Granted
Method for displaying video signal dithered by related masks and video display apparatus applying the same
AssigneeSamsung Electronics Co., Ltd.
InventorsJi-yong Park, Sang-kyun Im, Nam-kyun Beon
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Abstract
A method for displaying a video which is dithered using related masks and a video display apparatus applying the same, the video display apparatus dithering a video signal using a first mask, performing color-processing with respect to the video signal, and dithering the color-processed video signal using a second mask which is related to the first mask. Accordingly, dithering is performed using related masks, thus preventing poor gradation of video signal.
Claims21
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.
8 more elements
A video display method, comprising:
- dithering a video signal using a first mask;
- color-processing the dithered video signal;
- dithering the color-processed video signal using a second mask related to the first mask;
- and
- outputting the dithered video signal,
- wherein the second mask is determined from among a plurality of predetermined masks according to the first mask,
- wherein, in response to a first predetermined mask being selected as the first mask, a corresponding second predetermined mask is subsequently selected 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.
5 more elements
A video processor comprising:
- a first dithering unit which dithers a 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.
4 more elements
Dependencies are inferred from the claim text.