Patent
1996-01-11
1997-12-30
Evans, Arthur G.
395114, 395115, G06K 1500
Patent
active
057040206
ABSTRACT:
A page printer printing document data includes a first rasterizing part for rasterizing the document data with a first resolution and a data compression part for compressing each of blocks which form first rasterized data from the first rasterizing part to produce a compression code, and for storing the compression code in a compression memory. The page printer further includes a data decompression part for decompressing the compression code stored in the compression memory, and for transmitting decompressed data to a printer engine having the first resolution. A second rasterizing part rasterizes the document data again with a second resolution less than the first resolution when the compression code exceeds a given size. A resolution converting part in the page printer converts second rasterized data from the second rasterizing part to conversion data with the first resolution, and transmits the conversion data to the printer engine having the first resolution.
REFERENCES:
patent: 5206741 (1993-04-01), Shimura et al.
patent: 5471563 (1995-11-01), Dennis et al.
PCL 5 Comparison Guide for Printers, Hewlett Packard No. 5961-0999, first edition, May 1993.
SoftBand High-Performance Low-Memory Imaging, Proprietary Information, Phoenix Technologies Ltd.
Hanyu Yoshiaki
Shimomae Mutsuo
Evans Arthur G.
Ricoh & Company, Ltd.
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