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A second-order Volterra filter-based nonlinear clipping detector

Title
A second-order Volterra filter-based nonlinear clipping detector
Author
장준혁
Keywords
Acoustic echo canceller; nonlinear clipping detector; nonlinear echo; Volterra filter
Issue Date
2016-12
Publisher
TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY
Citation
TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, v. 24, Issue 6, Page. 4849-4857
Abstract
In this paper, we propose a novel nonlinear clipping detector based on the second-order Volterra filter for an acoustic echo canceller (AEC). Since the performance of the conventional AEC algorithm drastically deteriorates when nonlinear clipping occurs, the adaptive filter pauses adaptation during the nonlinear clipping periods to avoid unwanted divergence. These nonlinear clipping periods are detected in our method using the magnitude spectrum of the quadratic Volterra filter in lower frequency ranges. Through extensive computer-based simulation results considering an acoustic room environment and various clipping levels, it is found that the proposed approach is effective in detecting the nonlinear clipping periods and improving AEC performance compared to the conventional AEC algorithm.
URI
http://journals.tubitak.gov.tr/elektrik/issues/elk-16-24-6/elk-24-6-23-1411-33.pdfhttps://repository.hanyang.ac.kr/handle/20.500.11754/101774
ISSN
1300-0632; 1303-6203
DOI
10.3906/elk-1411-33
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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