An Adaptive Filter With Gain and Time-Shift Parameters for Echo Cancellation

Zhiping Zhang, Zhiqiang Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a simple yet effective parametric adaptive filter (PAF) and demonstrate its excellent performance in acoustic echo cancellation applications. Specifically, the proposed PAF decomposes an adaptive filter into three components: a normalized finite impulse response filter, a gain factor and a time-shift factor. With a novel update scheme for the PAF, these three components can be adjusted with different step-size respectively. Therefore, the novel adaptive filter with a parametric structure is suitable to track an acoustic echo path, the change of which mainly happens to the gain and time-shift while the 'basic shape' of the transfer function keeps relatively stable. It is also important to point out that the proposed PAF is a general platform of adaptive filtering, and the conventional method can be considered as a special case of this general platform. Experiments based on measured impulse response in realistic environment show that the proposed PAF outperforms the conventional method on convergence rate in echo cancellation application when dealing with channel changes caused by adjustments of system gain and delay.

Original languageAmerican English
Title of host publication2016 10th International Symposium on Chinese Spoken Language Processing (ISCSLP)
EditorsHsin-Min Wang, Qingzhi Hou, Yuan Wei, Tan Lee, Jianguo Wei, Lei Xie, Hui Feng, Jianwu Dang, Jianwu Dang
PublisherIEEE
ISBN (Electronic)978-1-5090-4294-4
ISBN (Print)978-1-5090-4295-1
DOIs
StatePublished - May 2 2017
Event10th International Symposium on Chinese Spoken Language Processing, ISCSLP 2016 - Tianjin, China
Duration: Oct 17 2016Oct 20 2016

Conference

Conference10th International Symposium on Chinese Spoken Language Processing, ISCSLP 2016
Country/TerritoryChina
CityTianjin
Period10/17/1610/20/16

ASJC Scopus Subject Areas

  • Signal Processing
  • Computer Vision and Pattern Recognition
  • Linguistics and Language

Keywords

  • Adaptive filter
  • Delay
  • Echo cancellation
  • Gain

Disciplines

  • Electrical and Computer Engineering

Cite this