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. 19, 2019
Filed:
Dec. 30, 2016
Intopix S.a., Mont-Saint-Guibert, BE;
Valentin Dessy, Fleurus, BE;
Pascal Hubert Pellegrin, Wierde, BE;
Thomas Denison, Gembloux, BE;
Charles Daniel Buysschaert, Brussels, BE;
Gael Rouvroy, Woluwe-Saint-Pierre, BE;
Gauthier Crucifix, Libramont-Chevigny, BE;
Tanguy Gilmont, Court-Saint-Etienne, BE;
intoPIX s.a., Mont-Saint-Guibert, BE;
Abstract
The invention provides a method and device for compressing a sequence of signed coefficients wherein coefficients are grouped, for each group, the greatest coded line index (GCLI) is determined, a quantization level t is applied and only the GCLI-t lowest weight bits of the coefficients are copied into the output stream together with the value of the GCLI. According to the invention, sign bits are not coded for coefficient having a zero quantized value. The invention also provides a method for determining a data budget required for compressing a sequence of signed coefficients, in dependence of a quantization level, and a method for compressing an image within the limits of a given data budget constraint. The invention provides a compressed data set coding an image in an efficient way.