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:
Jun. 13, 2006
Filed:
Oct. 25, 2002
Herbert Buchner, Nittendorf, DE;
Walter Kellerman, Eckental, DE;
Herbert Buchner, Nittendorf, DE;
Walter Kellerman, Eckental, DE;
Grundig Multimedia B.V., Balerna, CH;
Abstract
A multichannel full-duplex audio signal transmission system, comprising an adaptive filter () provided for multichannel acoustic echo cancellation. A channel combining device () is provided between the preprocessing units (V, . . . VD) and loudspeakers (L, . . . ,LD), in which several (C>D) loudspeakers can be connected to one and the same preprocessing unit and by means of which the remaining D-C preprocessing units can be separated from the loudspeakers (L, . . , LD). The channel combining device permits an optimization of the convergence ratio of the adaptive adjustment of filter coefficients in said adaptive filter ().