Digital video image converter

Details Digital video image converter Digital video image converter

1987-07-20

1989-03-28

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358140, 358160, H04N 701, H04N 1120

Patent

active

048168980

ABSTRACT:
Each horizontal line of a high-resolution video image signal, input in an image format having a plurality of pixels of a predetermined resolution, is subjected to anti-alias filtering to produce a smooth analog signal with limited bandwidth. The smooth analog signal is sampled by an A/D converter and converted to an image format with different resolution from the original image signal, but without discarding all the information from any input pixel. Each converted horizontal line is matched, pixel by pixel, with successive and preceding horizontal lines, and subjected to a weighted averaging process to produce an output image with different vertical resolution from the original image signal, again without discarding all the information from any input pixel.

REFERENCES:
patent: 4654696 (1987-03-01), Dayton
patent: 4677483 (1987-06-01), Dischert
patent: 4694337 (1987-09-01), Lyons
patent: 4703353 (1987-10-01), David

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