Facsimile apparatus for producing variable size and resolution i

Details Facsimile apparatus for producing variable size and resolution i Facsimile apparatus for producing variable size and resolution i

1990-05-04

1992-11-17

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

346110R, 358302, H04N 576, G01D 902

Patent

active

051650738

ABSTRACT:
A facsimile system which produces variable resolution and size images on a reproduction medium is disclosed. A timing means produces two signals which control resolution in a first direction. The first signal controls release of pixels from a memory buffer to modulate the beam intensity of a cathode ray tube while the second signal controls the sweep in the first direction of the electron beam of the CRT. Resolution and size in a second direction is controlled by repeating lines of image data until the desired resolution is achieved. Hardware savings in the facsimile can be achieved by connecting a direct memory access controller to a graphics microprocessor through the host post of the graphics microprocessor and by using alternating banks of memory for storage of image data.

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patent: 4912566 (1990-03-01), Tasaka
patent: 4952923 (1990-08-01), Tamura

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