Reduced memory graphics-to-raster scan converter

Details Reduced memory graphics-to-raster scan converter Reduced memory graphics-to-raster scan converter

1982-12-27

1985-01-29

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358183, 340744, H04N 704, H04N 522

Patent

active

044969767

ABSTRACT:
A system and technique is disclosed which enables a reduction in memory for the display of superimposed data (alpha-numerics, symbols and graphics) in an all-raster scanned display. A video signal containing information to be displayed on a video monitor by raster scanning techniques is multiplexed with the output of a storage device containing information representing data for controlling the intensity of specific points on the monitor during the raster scan. The intensity is controlled by the signals from memory to produce data on the video monitor as an overlay to the normal video display produced by the video signal. In one embodiment, the storage device is formed by two separate memory areas having a size substantially less than the total number of lines forming one raster field of the video display. The first memory area is multiplexed with the video signal while the second memory area is being filled and the second memory area is multiplexed with the video signal while the first memory area is being filled. This process is repeated a predetermined number of times for each field scan of the video display.

REFERENCES:
patent: 3787819 (1974-01-01), Busink
patent: 3818482 (1974-06-01), Yoshida et al.
patent: 3872461 (1975-03-01), Jarosik et al.
patent: 3894292 (1975-07-01), Wilkinson et al.
patent: 3952297 (1976-04-01), Stauffer et al.
patent: 3976831 (1976-08-01), Danell et al.
patent: 3996585 (1976-12-01), Hogan et al.
patent: 4011556 (1977-03-01), Tochitani
patent: 4052719 (1977-10-01), Hutt et al.
patent: 4081797 (1978-03-01), Olson
patent: 4233628 (1980-11-01), Ciciora
patent: 4298891 (1981-11-01), Baba et al.
patent: 4325063 (1982-04-01), Herman
patent: 4409617 (1983-10-01), Whitehead et al.

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