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:
Feb. 02, 1999
Filed:
Nov. 08, 1996
Takahiro Hongu, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A bi-level image coder for providing reduced bit rate arithmetic codes is disclosed, wherein each page of image to be coded is divided into a plurality of areas such as line groups, or blocks, and an arithmetic coder codes each of input pixels (the pixel S.sub.i) by using a predicted value of MPS (most probable symbol) and a predicted probability of LPS (least probable symbol) occurrence which are generated with a template and a LPS predicted probability table. The pixel attribute of the pixel S.sub.i is determined to one of a character image attribute, a dither/dot image attribute and a halftoned image attribute based on statistical properties of the area of the pixel S.sub.i. One of predetermined LPS predicted probability tables and one of predetermined templates are selected for each of the areas in operation. The coder may be so arranged as to following the JBIG standard. In one embodiment, a specific pixel of the template used for context data generation is moved to a position highly correlated with the pixel to be coded.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile