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:
Aug. 17, 2004
Filed:
Jun. 12, 2000
Scott C. Clouthier, Boise, ID (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
To reduce the memory requirements of a printer, it is desirable to compress rendered data of a to-be-printed page. Specific types of data of a to-be-printed page are best compressed using either lossless or lossy data-compression engines. “Text,” “graphics,” and “halftone” images are typically best compressed using a lossless engine. “Natural” images (such as photographs) are typically best compressed using a lossy engine. To select the best compression engine, the fast page analyzer divides the page into multiple horizontal strips of multiple horizontal lines. The fast page analyzer concurrently compresses and analyzes each strip. The analysis of one strip determines which compression engine is used to compress the next strip. In effect, each strip predicts the proper engine to compress the next strip. When printing a page that has been compressed in that manner, the printer will decompress each strip using its associated decompressor. The pixels and lines are delivered to a print engine as they are decompressed and in the order that the print engine prints the image onto the paper.