Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1997-11-04
1999-11-23
Tung, Kee M.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345154, G09G 506
Patent
active
059908769
ABSTRACT:
In a method and apparatus for reducing the number of matrix operations when converting digitized RGB color space signals to digitized YCbCr color space signals, at least two color difference signals, each being in terms of any two of the digitized RGB color space signals, are generated before performing first, second, third and fourth matrix multiplication operations of the color difference signals. The first and second matrix multiplication operations have first and second results to be used in conversion for the digitized Y color space signal. The third matrix multiplication operation has a third result to be used in conversion for the digitized Cb color space signal. The fourth matrix multiplication operation has a fourth result to be used in conversion for the digitized Cr color space signal. One of the first and second matrix multiplication operations and one of the third and fourth matrix multiplication operations are associated with the same one of the color difference signals and are jointly implemented in a single look-up table unit.
REFERENCES:
patent: 4507676 (1985-03-01), Dischert et al.
patent: 4742386 (1988-05-01), Wilkinson
patent: 4829455 (1989-05-01), Long et al.
patent: 4835599 (1989-05-01), Sigel
patent: 5124688 (1992-06-01), Rumball
patent: 5262847 (1993-11-01), Rodriguez et al.
patent: 5504821 (1996-04-01), Kanamori et al.
patent: 5510852 (1996-04-01), Shyu
patent: 5541658 (1996-07-01), Ishiwata
patent: 5798753 (1998-08-01), Zhou et al.
patent: 5818613 (1998-10-01), Masterson et al.
patent: 5821919 (1998-10-01), Coelho
patent: 5841422 (1998-11-01), Shyu
Tung Kee M.
Winbond Electronics Corp.
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