Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1996-01-02
1998-07-07
Jankus, Almis R.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
G06T 300
Patent
active
057776245
ABSTRACT:
Method and apparatus for preventing visual artifacts when converting a 24 bits per pixel red-green-blue (RGB) video signal to a 16 bit per pixel video signal, including a decimator circuit for discarding the least significant bits (LSBs) of the red, green and blue color components of a pixel in the RGB video signal. Further included is an error diffusion circuit coupled to the decimator circuit for adding the LSBs of each of the aforementioned color components of a pixel in the RGB video signal to the LSBs of the same color components of a previous pixel in the RGB video signal and factoring a carry generated by the addition into the MSBs of the same color components of a next pixel in the RGB video signal. An edge detector circuit is coupled to the error diffusion circuit for resetting the error diffusion circuit when the MSBs of the color components of the pixel in the RGB video signal are not the same as the MSBs of the color components of the previous pixel in the RGB video stream.
REFERENCES:
patent: 5070413 (1991-12-01), Sullivan et al.
patent: 5479594 (1995-12-01), Lum
Intel Corporation
Jankus Almis R.
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