Title:
可変チャンネル数の多チャンネル反響消去装置とその方法
Document Type and Number:
Japanese Patent JP4202922
Kind Code:
B2
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 (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 ).
Inventors:
Buchner Herbert
Kellerman Walter
Kellerman Walter
Application Number:
JP2003541242A
Publication Date:
December 24, 2008
Filing Date:
October 25, 2002
Export Citation:
Assignee:
Grundig Multimedia Besloten Fennaught Shap
International Classes:
H04B3/23; H04M9/08; H04R3/02
Domestic Patent References:
| JP2001100785A | ||||
| JP42928A | ||||
| JP9130306A |
Other References:
T.YENSEN et al.,An acoustic echo cancellation structure for synthetic surround sound,IEEE International Conference on Acoustics, Speech, and Signal Processing, 2001,米国,IEEE,2001年 5月,vol.5,pp.3237-3240
Attorney, Agent or Firm:
Mitsufumi Esaki
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith