| 54 |
Title |
TI |
[DE] Vorrichtung und Verfahren zur mehrkanaligen akustischen Echokompensation mit variabler Kanalzahl |
| 71/73 |
Applicant/owner |
PA |
GRUNDIG Aktiengesellschaft i.Ins., 90471 Nürnberg, DE
|
| 72 |
Inventor |
IN |
Buchner, Herbert, Dipl.-Ing., 93152 Nittendorf, DE
;
Kellermann, Walter, Prof.Dr.-Ing., 90542 Eckental, DE
|
| 22/96 |
Application date |
AD |
Oct 27, 2001 |
| 21 |
Application number |
AN |
10153188 |
|
Country of application |
AC |
DE |
|
Publication date |
PUB |
Aug 21, 2003 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
H04R 5/04
|
| 51 |
IPC secondary class |
ICS |
H04B 3/20
H04M 9/08
H04R 3/00
|
|
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 |
WO001997031439A1
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
BENESTY,J. et al.: A Better Understanding and an improved solution to the problems of stereophonic acoustic echo cancellation. In: Proc. IEEE Inter- nat. Conf. on Acoustics, Speech and Signal Proc- essing (ICASSP 97), München, April 1997,S.303-306 p 0;
M. Mohan Sondhi et al: Stereophonic Acoustic Echo Cancellation-An Overview of the Fundamental Prob- blem. In: IEEE Signal Processing Letters, Vol.2, Nr.8, August 1995 p 0;
MAKINO, S. et al.: Stereophonic Acoustic Echo Cancellation- An overview and Recent Solutions. In: Proc. 6th Int. Workshop on Acoustic Echo and Noise Control, Pocono Manor, PA, USA, Sept. 1999, S.12-19. n;
Shimauchi,S. et al.: Stereo Projektion Echo Can- celler with true Echo Path Estimation. in: IEEE Internat. Conf. on Acoustics, Speech and Signal Processing (ICASSP 95), Detroit, MI, USA, S.3059- 3062. p 0;
Shoji Makino: Stereophonic accoustic echo cancell-ation: An overview and recent solutions. In: Acc- oustical Science & Technology (Japan), Vol. 22, Sept. 2001, S. 325-333 p 0
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
H04M 9/08
H04R 3/00
H04R 3/02
H04R 3/12
H04R 5/04
|
