Facsimile and static presentation processing – Static presentation processing – Memory
Patent
1998-04-22
2000-09-05
Evans, Arthur G.
Facsimile and static presentation processing
Static presentation processing
Memory
358 117, G06K 1500
Patent
active
061151351
ABSTRACT:
An imaging device and method enable the freeing of memory during a punt (print overrun) avoidance operation and during a duplexing operation for enhanced page throughput. Specifically, if a first race condition threshold is met, being indicative of an estimated need to pre-rasterize a band from a page of image data for punt avoidance, and if after pre-rasterization it is determined pre-rasterization is not actually needed for punt avoidance, then the pre-rasterized band is evaluated relative to its display list for memory savings purposes for improved page throughput performance. Similarly, if a duplex condition threshold is met, being indicative of a band being part of a first side of a duplex page being processed and of an estimated need to save memory for processing of the second side of the duplex page, then the band is pre-rasterized and evaluated relative to its display list for memory savings purposes for improved duplex page throughput performance. If neither the race condition threshold nor duplex condition threshold is met, but an increased general memory savings condition threshold is met for the band, then the band is pre-rasterized for memory savings purposes.
REFERENCES:
patent: 4860119 (1989-08-01), Maniwa et al.
patent: 5129049 (1992-07-01), Cuzzo et al.
patent: 5479587 (1995-12-01), Campbell et al.
patent: 5483622 (1996-01-01), Zimmerman et al.
Pending US Patent Application PDNO: 10971109; S/N: 08/918,835; Filed: Aug. 26, 1997; Title: Reducing Memory Fragmentation By Coalescing And Redistributing Previously Distributed Page Strips.
Pending US Patent Application PDNO: 10971687; S/N: 08/958,437; Filed: Oct. 27, 1997 Title: Memory Partitioning For Multi-Resolution Pauseless Page Printing.
Blair Timothy P.
Campbell Russell
Dow Richard M.
Mellor Douglas J.
Evans Arthur G.
Hewlett--Packard Company
Simmons Lane R.
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