The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2000
Filed:
Nov. 12, 1997
Keisuke Mitani, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Printing data is managed per band in the form of intermediate band and is output through a banding process. The bands which are estimated to undergo print overrun are subject to rendering before execution of printing out, by reserving temporary band rasters. When the temporary band rasters cannot be secured because of deficiency of the memory vacant capacity, the bands are managed in the form of compressed data by rendering and compressing the intermediate data using a normal band raster. When rendering of additional printing data is required for the compressed data, the compressed data is restored to the normal band raster, following which both the additional print data and the compressed data are subject to rendering and then compression again. If memory deadlock occurs, all the bands are compressed by selecting suitable one of plural compression types. In those processing steps, whether all the bands are to be compressed or not is determined and, based on the determination result, a process of compressing all the bands is executed so that the processing will not be disabled because of memory deficiency.