Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1986-05-15
1989-09-26
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
340750, H04N 514
Patent
active
048704911
ABSTRACT:
A video RAM write control circuit has a video RAM for storing pattern data of one frame at addresses thereof which correspond to display positions, and a control circuit for generating write pattern data and write addresses. The video RAM stores a pattern which is continuous in the horizontal direction, at consecutive addresses thereof. Each row on the screen consists of several rasters. A video RAM address has a memory address representing a position in the horizontal direction, in its lower bits, so well as a raster address representing a raster position of the row, at upper bits thereof. A write address is rotated toward the MSB by the number of bits of the raster address, and a resultant permuted address is supplied to the video RAM.
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patent: 4533952 (1985-08-01), Norman, III
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Booth, Kellogg S., "Tutourial: Computer Graphics" IEEE, pp. 78-79, 1979.
Baxes, Gregory A., "Digital Image Processing" Prentice-Hall Inc., pp. 163-164, 1984.
Groody James J.
Harvey David E.
Tokyo Shibaura Denki Kabushiki Kaisha
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