Title:
【発明の名称】適応フィルタ及びエコーキャンセラ
Document Type and Number:
Japanese Patent JP3359460
Kind Code:
B2
Abstract:
An adaptive filter in the form of an FIR or IIR filter performs an adaptive filtering process relative to an input signal using a plurality of tap coefficients. The adaptive filter derives a vector formed by absolute values of the plurality of tap coefficients and weights step sizes of the plurality of tap coefficients using the first vector. The adaptive filter updates the plurality of tap coefficients based on the weighted step sizes. With this arrangement, the optimum tap coefficients can be achieved with high convergence speed. The adaptive filter is applicable to an echo canceller, such as, an acoustic echo canceller or a line echo canceller, so that echo canceling is effectively achieved by updating the tap coefficients with high accuracy and with high speed.
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Inventors:
Shinichi Kawada
Kenichi Shinritsu
Kenichi Shinritsu
Application Number:
JP6090995A
Publication Date:
December 24, 2002
Filing Date:
March 20, 1995
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
H04B3/06; H04B3/23; H04M9/08; H03H21/00; (IPC1-7): H04B3/23; H03H21/00; H04B3/06
Domestic Patent References:
| JP5244043A | ||||
| JP6296119A | ||||
| JP5101306A | ||||
| JP57145445A |
Attorney, Agent or Firm:
Nobuyuki Kudo