Computer graphics processing and selective visual display system – Display peripheral interface input device
Patent
1998-04-15
2000-11-07
Shankar, Vijay
Computer graphics processing and selective visual display system
Display peripheral interface input device
345147, 345150, G09G 510, G09G 504
Patent
active
061443654
ABSTRACT:
The present invention provides an alpha blending unit that is able to perform alpha blending on sub-samples of a pixel in an efficient manner. The alpha blending unit preferably comprises a plurality of registers for storing a source color, a blending value, and a plurality of destination sub-sample values, multipliers, adders, an accumulator and a divider. The alpha blending unit advantageously sums the destination sub-sample values and then divides them by the number of sub-samples to generate a combined destination color value. This combined destination color value along with the source color and a blending value are then provided to the multipliers, and adders to generate a new destination color value for the pixel.
REFERENCES:
patent: 5652601 (1997-07-01), Coelho et al.
patent: 5774577 (1998-06-01), Veda et al.
patent: 5828781 (1998-10-01), Nakano
patent: 5835242 (1998-11-01), Itoh
patent: 5896136 (1999-04-01), Augustine et al.
Khurana Anoop
Kottapalli Sreenivas R.
Kuo Dong-Ying
Niu Roger
Young Eric S.
S3 Incorporated
Shankar Vijay
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