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:
Mar. 17, 1998
Filed:
Apr. 05, 1995
Elliot Neil Linzer, Bronx, NY (US);
Heidi Aarlien Peterson, New York, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for coding a digitized picture is described. The picture is divided into a plurality of regions and then each region is further divided into a plurality of subregions. Linear combinations of pixels in each subregion are then computed. A subregional adaptive quantisation parameter for each of the subregions is then determined based on the courseness tolerance of that subregion as established by processing the linear combinations. A regional quantisation parameter for each region is then determined as a function of the subregional adaptive quantisation parameters and then a quantisation level for each of the regions is determined based on the regional quantisation parameter. Once the regional quantisation level for a region has been determined, it is transform encoded. The transform encoded representations of the regions are concatenated to obtain an encoded representation of the entire picture which can then be decoded for display or storage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile