System and method for controlling a display of graphics data pixels on a video monitor having a different display aspect ratio than the pixel aspect ratio
AssigneeKabushiki Kaisha Toshiba
InventorAkihisa Fujimoto
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Abstract
A system and method for displaying graphics data having a pixel aspect ratio on a television monitor with improved quality including initially up scaling the resolution of the graphics data in a horizontal direction so as to keep the original pixel aspect ratio of the graphics data constant. The graphics data and the television monitor having a different aspect ratios. The graphics data are scaled in the horizontal direction so as to coincide with a horizontal resolution of the television monitor. The system improves display of graphics images on television monitors while using simplified algorithms and hardware.
Claims16
A system for controlling a display of mixed images of graphics data having a pixel aspect ratio and motion picture data on a video monitor having a display aspect ratio different from the pixel aspect ratio, comprising:
- means for storing the graphics data and the motion picture data wherein the graphics data is pre-scaled up or pre-scaled down in at least one of a horizontal or vertical resolution direction;
- and
- means for controlling generation of the mixed images of the graphics data on the video monitor, comprising:
- means for reading out the graphics data and the motion picture data from the storing means;
- means for memorizing the pre-scaled graphics data;
- means for converting the graphics data read out from the memorizing means to a particular color data applicable to the video monitor;
- means for filtering the graphics data for reducing brightness and color band width of the graphics data;
- means for scaling down or up the resolution of the filtered graphics data in accordance with the display aspect ratio for the video monitor;
- and
- means for mixing the scaled down or up graphics data from the scaling means and the motion picture data on a video window of the video monitor.
A system for controlling a display of graphics data having a pixel aspect ratio of 1:1 on a video monitor having a display aspect ratio of 16:9, comprising:
- means for storing the graphics data and video data, wherein a resolution of the graphics data is pre-scaled up in a horizontal resolution direction so as to keep a same pixel aspect ratio of 1:1 when the graphics data are displayed on the video monitor having the display aspect ratio of 16:9;
- means for reading out a center area portion of the graphics data by eliminating side area portions from the graphics data;
- means for scaling down the read out graphics data in a horizontal resolution direction to coincide to a horizontal resolution of the video data;
- and
- means for displaying the scaled graphics data on the video monitor.
A system for controlling a display of graphics data having a aspect ratio of 16:9 or 4:3 included in an image source on a video monitor having a display aspect ratio of 16:9 or 4:9, comprising:
- means for reading out the graphics data from a memory storing the image source;
- means for scaling up or down the read out graphics data in a horizontal resolution direction as a function of the graphics data in the image source and the display aspect ratio of the video monitor;
- and
- means for displaying the scaled graphics data on the video monitor;
- wherein the horizontal resolution of the graphics data is determined to be a value that is selected among multiples of 8 or 16 and so as to be a closest value of multiplication of a horizontal resolution of the graphics data and the pixel aspect ratio of the graphics data.
A method for controlling to display graphics data having a pixel aspect ratio of 1:1 on a video monitor having a display aspect of 16:9, comprising:
- storing the graphics data and video data, wherein a resolution of the graphics data is pre-scaled up in a horizontal resolution direction so as to keep a same pixel aspect ratio of 1:1 when the graphics data are displayed on the video monitor having the display aspect ratio of 16:9;
- reading out a center area portion of the graphics data by eliminating side area portions from the graphics data;
- scaling up the read out graphics data in a horizontal resolution direction to coincide to a horizontal resolution of the video data;
- and
- displaying the scaled graphics data on the video monitor.
Dependencies are inferred from the claim text.