Graphics display system with anti-aliased text and graphics feature
First Claim
Patent Images
1. A method of displaying a graphical element comprising:
- reducing a gray level of multi-level values by at least one bit;
alpha blending using the reduced multi-level values as alpha blend values; and
filtering the graphical element with a box filter to generate a multi-level value per pixel at the intended final display resolution.
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Abstract
A graphics integrated circuit chip is used in a set-top box for controlling a television display. The graphics chip processes analog video input, digital video input, a graphics input and an audio input simultaneously. The system may use anti-aliased text and graphics to provide high quality display of graphical elements, or glyphs, which represent an image of a character of text or graphics, on television and other displays. The graphical elements may be superimposed over live video or arbitrary graphics imagery.
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Citations
16 Claims
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1. A method of displaying a graphical element comprising:
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reducing a gray level of multi-level values by at least one bit; alpha blending using the reduced multi-level values as alpha blend values; and filtering the graphical element with a box filter to generate a multi-level value per pixel at the intended final display resolution. - View Dependent Claims (2, 3, 4, 5)
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6. A graphics display system for displaying a graphical element comprising:
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a display engine for reducing a gray level of multi-level values and for compositing the graphical element with at least one graphics image using the reduced multi-level values as alpha blend values, wherein generation of the multi-level values do not depend on alpha blend values that existed prior to filtering. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification