Font compression and decompression for character generation

Details Font compression and decompression for character generation Font compression and decompression for character generation

1981-04-06

1984-11-06

Zache, Raulfe B.

Boots, shoes, and leggings

364300, 364731, 340347DD, G06F 500, G06F 300

Patent

active

044816022

ABSTRACT:
In a technique for storing data representative of characters and symbols of a font in a compacted manner, interstitial bank spaces between characters are removed. The proper symbol is addressed during decompression by combining a calculated approximate pointer with a limited range correction factor stored with the font to obtain an exact start of symbol pointer utilized to address the image data for the symbol. Also stored with the correction factor is data indicating the vertical positioning of the symbol within the character box.

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patent: 4346377 (1982-08-01), Green
patent: 4353653 (1982-10-01), Zimmerman
C. P. Thacker et al., "Alto: A Personal Computer", (Xerox Palo Alto Research Center 1979).

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