Color conversion using 4.5 bit palette

Details Color conversion using 4.5 bit palette Color conversion using 4.5 bit palette

1996-08-30

1998-03-24

Nguyen, Phu K.

G06F 1500

Patent

active

057322058

ABSTRACT:
A computer-implemented process and apparatus are used for efficient conversion of color video signals. The most significant bits (MSBs) of YUV data are masked off and converted into a single index that allows for the number of colors needed in a standard display format. The Y MSBs are scaled down by a fractional factor prior to the formation of the index so as to save computer memory space that would otherwise be wasted. In a preferred embodiment, relatively low-noise and temporally-changing dithering is applied to the values of full-sampled YUV data prior to color conversion.

REFERENCES:
patent: 4743959 (1988-05-01), Frederiksen
patent: 4775858 (1988-10-01), Stapleton et al.
patent: 4857992 (1989-08-01), Richards
patent: 4991122 (1991-02-01), Sanders
patent: 5068644 (1991-11-01), Batson et al.
patent: 5124688 (1992-06-01), Rumball
patent: 5138303 (1992-08-01), Rupel
patent: 5142273 (1992-08-01), Wobermin
patent: 5204664 (1993-04-01), Hamakawa
patent: 5218431 (1993-06-01), Gleicher et al.
patent: 5218432 (1993-06-01), Wakeland
patent: 5220410 (1993-06-01), Wakeland et al.
patent: 5233684 (1993-08-01), Ulichey
patent: 5258826 (1993-11-01), Wakeland et al.
patent: 5329292 (1994-07-01), Nishioka et al.
patent: 5341442 (1994-08-01), Barrett
patent: 5381180 (1995-01-01), Keith
patent: 5384582 (1995-01-01), Keith et al.
patent: 5406310 (1995-04-01), Aschenbrenner et al.
patent: 5416614 (1995-05-01), Crawford
patent: 5428465 (1995-06-01), Kanamori et al.
patent: 5428720 (1995-06-01), Adams, Jr.
patent: 5430465 (1995-07-01), Sabella et al.
patent: 5450098 (1995-09-01), Oz
patent: 5485558 (1996-01-01), Weise et al.
IBM Technical Disclosure Bulletin, vol. 37, No. 03, Mar. 1994 New York, US, pp. 95-96, XP 000107434 `Direct-to-Palette Dithering.`
IBM Technical Dislosure Bulletin, vol. 33, No. 5, Oct. 1990 New York, US, pp. 200-205, XP 000107434 `Default RGB color Palette with Simple Conversion from YUV.`
IEEE Transactions on Consumer Electronics, vol. 37, Issue 3, Aug. 1991, pp. 182-189, "Single-Chip Video Processing System,"by Hans-Jurgen Desor.

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