System for processing received print data prior to printing

Details System for processing received print data prior to printing System for processing received print data prior to printing

1997-01-08

1999-11-02

Rogers, Scott

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

395112, 395115, 358518, 358524, G06K 1502, H04N 150, H04N 160, H04N 121

Patent

active

059785535

ABSTRACT:
When print data is received from a host computer, a rendering/compression/expansion unit generates image data in a unit of a band, then a specified logical operation is performed on the image data in the band unit and the resultant image data is compressed to be stored. When the image data corresponding to one page of an original image is stored, the image data is expanded and printed by a printer. Since the generation of image data and logical operation are performed in the band unit, the memory capacity required for the processing is small. Also, since the image data is compressed after the above process, the memory capacity required for storing is small. By virtue of this, resolution or tone of an original image does not have to be decreased depending on a memory capacity.

REFERENCES:
patent: 4642680 (1987-02-01), Yamada
patent: 5136688 (1992-08-01), Morikawa et al.

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