| 54 |
Title |
TI |
[DE] VORRICHTUNG UND VERFAHREN ZUR MEHRKANALIGEN AKUSTISCHEN ECHOKOMPENSATION MIT VARIABLER KANALZAHL
[EN] DEVICE AND METHOD FOR MULTICHANNEL ACOUSTIC ECHO CANCELLATION WITH A VARIABLE NUMBER OF CHANNELS
[FR] DISPOSITIF ET PROCEDE D'ANNULATION D'ECHO ACOUSTIQUE MULTICANAL A NOMBRE DE CANAUX VARIABLE |
| 71/73 |
Applicant/owner |
PA |
GRUNDIG AG, DE
|
| 72 |
Inventor |
IN |
BUCHNER HERBERT, DE
;
KELLERMANN WALTER, DE
|
| 22/96 |
Application date |
AD |
Oct 25, 2002 |
| 21 |
Application number |
AN |
02790303 |
|
Country of application |
AC |
EP |
|
Publication date |
PUB |
Jul 21, 2004 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
DE
10153188
Oct 27, 2001
|
33
31
32 |
PRC
PRN
PRD |
EP
0211934
Oct 25, 2002
|
| 51 |
IPC main class |
ICM |
H04M 3/00
|
| 51 |
IPC secondary class |
ICS |
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
H04M 9/082
H04R 27/00
H04R 3/02
|
|
MCD main class |
MCM |
|
|
MCD secondary class |
MCS |
H04B 3/23
(2006.01)
H04M 9/08
(2006.01)
H04R 3/02
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] 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 (V 1 , . . . VD) and loudspeakers (L 1 , . . . ,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 1 , . . , LD). The channel combining device permits an optimization of the convergence ratio of the adaptive adjustment of filter coefficients in said adaptive filter ( 2 ). |
| 56 |
Cited documents identified in the search |
CT |
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
|
