Methods and apparatus for CYMK-RGB RAMDAC

Details Methods and apparatus for CYMK-RGB RAMDAC Methods and apparatus for CYMK-RGB RAMDAC

1992-05-01

1994-02-22

Nguyen, Phu K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358527, G03F 308, G06F 1568

Patent

active

052895653

ABSTRACT:
A thirty-two bit frame buffer provides real time conversion of CYMK color data to RGB color data for display on a video monitor. The frame buffer operates at a video rate of 100 mHz and includes pipelined arithmetic using look up tables for some of the CYMK to RGB conversion steps. Also provided are look up tables providing gamma correction and pixel-by-pixel selection of CYMK to RGB conversion, to allow display of an RGB window in a CYMK information display.

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patent: 4668980 (1987-05-01), Stansfield et al.
patent: 4893179 (1990-01-01), Ito
patent: 4897806 (1990-01-01), Cook et al.
patent: 4924301 (1990-05-01), Surbrook
patent: 4959790 (1990-09-01), Morgan

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