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. 19, 2013
Filed:
Mar. 26, 2008
Christian Uhle, Erlangen, DE;
Juergen Herre, Buckenhof, DE;
Stefan Geyersberger, Würzburg, DE;
Falko Ridderbusch, Nürnberg, DE;
Andreas Walter, Bamberg, DE;
Oliver Moser, Erlangen, DE;
Christian Uhle, Erlangen, DE;
Juergen Herre, Buckenhof, DE;
Stefan Geyersberger, Würzburg, DE;
Falko Ridderbusch, Nürnberg, DE;
Andreas Walter, Bamberg, DE;
Oliver Moser, Erlangen, DE;
Abstract
An apparatus for extracting an ambient signal from an input audio signal comprises a gain-value determinator configured to determine a sequence of time-varying ambient signal gain values for a given frequency band of the time-frequency distribution of the input audio signal in dependence on the input audio signal. The apparatus comprises a weighter configured to weight one of the sub-band signals representing the given frequency band of the time-frequency-domain representation with the time-varying gain values, to obtain a weighted sub-band signal. The gain-value determinator is configured to obtain one or more quantitative feature-values describing one or more features of the input audio signal and to provide the gain-value as a function of the one or more quantitative feature values such that the gain values are quantitatively dependent on the quantitative values. The gain value determinator is configured to determine the gain values such that ambience components are emphasized over non-ambience components in the weighted sub-band signal.