Patent · US Expired

Device and method for carrying out multichannel acoustic echo cancellation with a variable number of channels

US7062041B2 · kind B2 · utility

4Cited by

0References

6Claims

0Family size

Assignee

Grundig Multimedia B.V. · NL

Inventors

Herbert Buchner · Nittendorf, DE
Walter Kellerman · Eckental, DE

Key dates

Filing date	Oct 25, 2002
Grant date	Jun 13, 2006
Priority date	—
Expiry date	Nov 11, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH04R27/00
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A multichannel full-duplex audio signal transmission system, comprising an adaptive filter (2) provided for multichannel acoustic echo cancellation. A channel combining device (5) is provided between the preprocessing units (V1, . . . VD) and loudspeakers (L1, . . . ,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 (L1, . . , LD). The channel combining device permits an optimization of the convergence ratio of the adaptive adjustment of filter coefficients in said adaptive filter (2).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.