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. 10, 2013
Filed:
Nov. 05, 2012
Research IN Motion Limited, Waterloo, CA;
David Stuart Furbeck, Keller, TX (US);
Research In Motion Limited, Waterloo, Ontario, CA;
Abstract
A method, system and computer program product for optimal encoding for an image defined by image data. The quantization table, run-length coding and Huffman codebook are selected to minimize a Lagrangian cost function, wherein the minimization includes iteratively determining the optimal run-size pairs and in-category indices for minimizing a rate-distortion cost function, and wherein the rate-distortion cost function includes a perceptual weighting factor applied to a quantization error. The perceptual weighting factor adjusts the rate-distortion cost function to apply greater weight to lower frequency quantization error than to higher frequency quantization error.