Sub-banding of display list and video buffer for page...

Details Sub-banding of display list and video buffer for page... Sub-banding of display list and video buffer for page...

2006-05-23

2006-05-23

Poxrzywn, Joseph R. (Department: 2622)

Facsimile and static presentation processing

Static presentation processing

Memory

C358S001150, C358S001160, C358S001170, C358S001900, C358S523000

Reexamination Certificate

active

07050191

ABSTRACT:
A print method converts page description data specifying a print document into pixel data. The print system includes a central processing unit, a first memory and a second memory that is smaller but faster than the first memory. The method extracts a display list from the page description data (503), allocates space within the first memory to serve as a page buffer and divides the page buffer within the first memory into a plurality of sub-bands. Each sub-band is smaller than the second memory. For each sub-band the method renders pixels of a current sub-band into the second memory (506). When the sub-band is completely rendered, the method transfers pixel data from the second memory to the current sub-band of the page buffer (509). When all sub-bands are rendered, the page is printed by transfer of data from the page buffer to a print engine (512). The central processing unit and the second memory are preferably disposed on the same integrated circuit.

REFERENCES:
patent: 5410672 (1995-04-01), Sodek et al.
patent: 5604846 (1997-02-01), Kadota
patent: 6115131 (2000-09-01), Payne
patent: 6538764 (2003-03-01), Ueda
patent: 0 801 357 (1997-10-01), None
patent: WO 96 39680 (1996-12-01), None

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