Title:
適応的フィルタリング
Document Type and Number:
Japanese Patent JP2006526328
Kind Code:
A
Abstract:
An adaptive filtering device and method where at least one adaptive filter receives an input signal and a metering device receives an output of the at least one adaptive filter, monitors a characteristic of the output, such as power of high-frequency components, and forwards a correction signal in a feedback loop to adjust the characteristic of the at least one filter in order to change the characteristic of the output. An adaptive filtering device ( 200 ) and method where two low-pass FIR filters ( 202, 204 ) receive an input signal, a weighted adder ( 206 ) receives outputs from the two low-pass FIR filters and changes a weighting of each to produce filtered output data, and a controller ( 208 ) that receives a cutoff frequency ( 203 ), supplies the cut-off frequency to the two low-pass FIR filters, and supplies a signal to the weighted adder for varying the weighting of each of the low-pass FIR filters to switch therebetween.
Inventors:
Jansen, Elwin
Lehman, Delk
Lehman, Delk
Application Number:
JP2006506856A
Publication Date:
November 16, 2006
Filing Date:
April 15, 2004
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H03H21/00; H03H17/02; H04R3/04
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito