Title:
AN ADAPTIVE FILTER
Document Type and Number:
WIPO Patent Application WO/2019/056372
Kind Code:
A1
Abstract:
The invention provides a method of processing signals by an adaptive filter. The method includes the steps of determining a direct path distance d between a speaker and a microphone. Based on said determined direct path distance d, a number of taps of the adaptive filter having a zero-valued coefficient is calculated. Input signals to the adaptive filter are then processed adaptively on all remaining taps of the adaptive filter not having a zero-valued coefficient. The adaptive filter can be utilized in an AEC system which dynamically adapts to changes in the direct path distance d.
Inventors:
COLMER MORGAN JAMES (CN)
Application Number:
PCT/CN2017/103183
Publication Date:
March 28, 2019
Filing Date:
September 25, 2017
Export Citation:
Assignee:
GLOBAL SILICON LTD (CN)
International Classes:
H03H21/00; H04B3/23
Foreign References:
| US20030133565A1 | 2003-07-17 | |||
| US20120134502A1 | 2012-05-31 | |||
| US20100215185A1 | 2010-08-26 | |||
| CN1578138A | 2005-02-09 | |||
| CN102025395A | 2011-04-20 |
Attorney, Agent or Firm:
HENSEN INTELLECTUAL PROPERTY FIRM (CN)
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