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. 18, 2014
Filed:
Apr. 19, 2012
Guillaume Fuchs, Erlangen, DE;
Vignesh Subbaraman, Germering, DE;
Nikolaus Rettelbach, Nuremberg, DE;
Markus Multrus, Nuremberg, DE;
Marc Gayer, Erlangen, DE;
Patrick Warmbold, Emskirchen, DE;
Christian Griebel, Nuremberg, DE;
Oliver Weiss, Nuremberg, DE;
Guillaume Fuchs, Erlangen, DE;
Vignesh Subbaraman, Germering, DE;
Nikolaus Rettelbach, Nuremberg, DE;
Markus Multrus, Nuremberg, DE;
Marc Gayer, Erlangen, DE;
Patrick Warmbold, Emskirchen, DE;
Christian Griebel, Nuremberg, DE;
Oliver Weiss, Nuremberg, DE;
Abstract
An audio decoder has an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation and a frequency-domain-to-time-domain converter for providing a time-domain audio representation. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a numeric current context value describing a current context state. The arithmetic decoder determines the numeric current context value in dependence on a plurality of previously decoded spectral values. The arithmetic decoder evaluates at least one table using an iterative interval size reduction to determine whether the numeric current context value is identical to a table context value described by an entry of the table or lies within an interval described by entries of the table, and derives a mapping rule index value describing a selected mapping table. An audio encoder also uses an iterative interval table size reduction.