Bibliographic data

Document DE000010153188A1 (Pages: 10)

Bibliographic data Document DE000010153188A1 (Pages: 10)
INID Criterion Field Contents
54 Title TI [DE] Vorrichtung und Verfahren zur mehrkanaligen akustischen Echokompensation mit variabler Kanalzahl
71/73 Applicant/owner PA GRUNDIG Aktiengesellschaft, 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 May 8, 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 [DE] Die vorliegende Erfindung betrifft ein Mehrkanal-Vollduplex-Audiosignalübertragungssystem mit einem zur mehrkanaligen akustischen Echokompensation dienenden adaptiven Filter (2), wobei zwischen Vorverarbeitungseinheiten (V1, ..., VD) und Lautsprechern (L1, ..., LD) eine Kanalkombinationsvorrichtung (5) vorgesehen ist, in der jeweils mehrere (C < D) Lautsprecher mit ein und derselben Vorverarbeitungseinheit verbindbar sind, wodurch die verbleibenden D-C Vorverarbeitungseinheiten von den Lautsprechern (L1, ..., LD) entkoppelbar sind und wodurch sich eine Optimierung des Konvergenzverhaltens der adaptiven Anpassung von Filterkoeffizienten im adaptiven Filter (2) ergibt.
[EN] The present invention relates to a multichannel full-duplex audio signal transmission system, comprising an adaptative filter (2) provided for the multichannel acoustic echo cancellation. According to said invention, a channel combining device (5) is provided between 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). Said channel combining device permits an optimization of the convergence ratio of the adaptative adjustment of filter coefficients in said adaptative 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 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 0
56 Cited non-patent literature indicated by the applicant CTNP
Citing documents Determine documents
Sequence listings
Search file IPC ICP H04B 3/20
H04M 9/08
H04R 3/00
H04R 3/02
H04R 3/12
H04R 5/04