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:
Nov. 25, 2014
Filed:
Jul. 12, 2012
Vignesh Subbaraman, Germering, DE;
Guillaume Fuchs, Erlangen, DE;
Markus Multrus, Nuremberg, DE;
Nikolaus Rettelbach, Nuremberg, DE;
Oliver Weiss, Nuremberg, DE;
Marc Gayer, Erlangen, DE;
Patrick Warmbold, Emskirchen, DE;
Christian Griebel, Nuremberg, DE;
Vignesh Subbaraman, Germering, DE;
Guillaume Fuchs, Erlangen, DE;
Markus Multrus, Nuremberg, DE;
Nikolaus Rettelbach, Nuremberg, DE;
Oliver Weiss, Nuremberg, DE;
Marc Gayer, Erlangen, DE;
Patrick Warmbold, Emskirchen, DE;
Christian Griebel, Nuremberg, DE;
Abstract
An audio decoder includes an arithmetic decoder for providing decoded spectral values on the basis of an arithmetically-encoded representation of the spectral values and a frequency-domain-to-time-domain converter for providing a time-domain audio representation using the decoded spectral values. The arithmetic decoder selects a mapping rule describing a mapping of a code value onto a symbol code in dependence on a context state described by a numeric current context value, and determines the numeric current context value in dependence on a plurality of previously-decoded spectral values. The arithmetic decoder modifies a number representation of a numeric previous context value, describing a context state associated with one or more previously decoded spectral values, in dependence on a context subregion value, to acquire a number representation of a numeric current context value describing a context state associated with one or more spectral values to be decoded. An audio encoder uses a similar concept.