Method and apparatus for processing video data of display device
AssigneeLG Electronics Inc.
InventorsDae Jin Myoung, Jun Hak Lee
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Abstract
Discloses herein is a method and apparatus for processing video data of a display device in which dithering noise generating when a motion picture is displayed can be minimized. According to the present invention, the method of processing the video data of the display device includes the steps of comparing data of an ith frame (i is a natural number) and data of a (i+1)th frame to determine whether the data of the (i+1)th frame is a motion picture or a still image, and employing a different dithering method depending upon the determination result of the motion picture or the still image.
Claims22
A method of processing video data of a display device, comprising:
- (a) comparing data of an ith frame (“i” is a natural number) and data of a (i+1)th frame to determine whether the data of the (i+1)th frame is a motion picture or a still image;
- and
- (b) employing a different dithering method to display the video data on the display device depending upon the determination result of the motion picture or the still image,
- wherein, in the dithering method, dithering is performed by selecting one of a plurality of dither mask patterns, which are disposed in the form of j (“j” is a natural number;
- horizontal)×j (vertical), based on gray scale values of input data and a vertical sync signal, and by extracting a specific dither value from the selected dither mask pattern based on a horizontal sync signal and a pixel clock, and
- wherein if it is determined that the data of the (i+1)th frame is a motion picture, dithering is performed using one or more j×j−1 dither mask patterns in which one vertical line is removed from the j×j dither mask patterns when a first dither mask pattern is applied in the (i+1)th frame.
An apparatus for processing video data of a display device, comprising:
- a motion detection circuit for comparing data of an ith frame (“i” is a natural number) and data of a (i+1)th frame to determine whether the data of the (i+1)th frame is a motion picture or a still image;
- and
- a dithering circuit for employing a different dithering method depending upon the determination result of the motion picture or the still image, wherein:
- the dithering circuit performs dithering by selecting one of a plurality of dither mask patterns, which are disposed in the form of j (“j” is a natural number;
- horizontal)×j (vertical), based on gray scale values of input data and a vertical sync signal, and by extracting a specific dither value from the selected dither mask pattern based on a horizontal sync signal and a pixel clock, and
- if it is determined that the data of the (i+1)th frame is a motion picture, the dithering circuit performs dithering using one or more j×j−1 dither mask patterns in which one vertical line is removed from the j×j dither mask patterns when a first dither mask pattern is applied in the (i+1)th frame.
A method of processing video data of a display device, comprising:
- comparing first and second frames to determine whether the second frame corresponds to a motion picture or a still image;
- and
- performing a dithering method to display the video data on the display device, the dithering method performed being based on whether the second frame is a motion picture or still image, wherein if the second frame is a motion picture, dithering is performed using one or more dither mask patterns that have a fewer number of vertical lines than dither mask patterns used to perform dithering when the second frame is a still image.
An apparatus for processing video data of a display device, comprising:
- a motion detection circuit to compare first and second frames to determine whether the second frame corresponds to a motion picture or a still image;
- and
- a dithering circuit to perform a dithering method to display the video data on the display device, the dithering method performed being based on whether the second frame is a motion picture or still image, wherein if the second frame is a motion picture, dithering is performed using one or more dither mask patterns that have a fewer number of vertical lines than dither mask patterns used to perform dithering when the second frame is a still image.
Dependencies are inferred from the claim text.