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. 05, 2013
Filed:
Mar. 08, 2007
Manuel Briand, Djursholm, SE;
David Virette, Pleumer Bodou, FR;
Manuel Briand, Djursholm, SE;
David Virette, Pleumer Bodou, FR;
France Telecom, Paris, FR;
Abstract
A system and a method for coding by principal component analysis (PCA) of a multi-channel audio signal comprising the following steps: decomposing at least two channels (L, R) of said audio signal into a plurality of frequency sub-bands (I(b), . . . , I(b), r(b), . . . , r(b)), calculating at least one transformation parameter (θ(b), . . . , θ(b)) as a function of at least some of said plurality of frequency sub-bands, transforming at least some of said plurality of frequency sub-bands into a plurality of frequency sub-components as a function of said at least one transformation parameter (θ(b), . . . , θ(b)), said plurality of frequency sub-components comprising principal frequency sub-components (CP(b), . . . , CP(b)), combining at least some of said principal frequency sub-components (CP(b), . . . , CP(b)) in order to form a principal component (CP), and defining a coded audio signal (SC) representing said multi-channel audio signal (C, . . . , C), said coded audio signal (SC) comprising said principal component (CP) and said at least one transformation parameter (θ(b), . . . , θ(b)).