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:
Jun. 27, 2000
Filed:
Apr. 08, 1998
Ricardo L de Queiroz, Pittsford, NY (US);
Reiner Eschbach, Webster, NY (US);
James E Bollman, Williamson, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An apparatus, method and system optimizes Huffman codes within the Huffman tables without requiring buffering an entire uncompressed original image. Compression of a whole image is performed prior to storage in a buffer. Therefore, the necessary buffer size for performing computation of symbol frequencies in order to optimize Huffman codes is reduced. Default Huffman codes are used to pre-compress the image for storage in the buffer. Simultaneously, the input symbol frequency is determined to produce optimized Huffman codes. The optimized Huffman codes are used to optimally re-encode the encoded image data to reduce the space of the re-encoded data. The optimally encoded image data can then be stored and/or transmitted.