A Delay-Based Double-Talk Detector

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Full text:
Author(s): Christian Schüldt, Fredric Lindström, Ingvar Claesson
Title: A Delay-Based Double-Talk Detector
Journal: IEEE Transactions on Audio, Speech, and Language Processing
Year: 2012
Volume: 20
Issue: 6
Pagination: 1725-1733
ISSN: 1558-7916
URI/DOI: 10.1109/TASL.2012.2188512
ISI number: 000302532000005
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail: csc@bth.se, fredric.lindstrom@limesaudio.com, icl@bth.se
Language: English
Abstract: When an adaptive filter is used for echo cancellation, it is essential to prevent the filter from diverging in situations when the echo signal is contaminated with near-end disturbance, i.e. during double-talk. This paper presents an extension of a previously proposed double-talk detector for improved performance. It is shown that the computational complexity of the proposed detector is lower than that of the well-used normalized cross correlation (NCC) double-talk detector, at the cost of performance. Further, it is shown that there can be a significant performance difference, in terms of detecting double-talk, between having a fixed echo cancellation filter, which is a common strategy in objective evaluation techniques, and an adaptive filter, which is more close to realistic conditions.
Subject: Signal Processing\General
Keywords: Echo cancellation, adaptive filters, double-talk, double-talk detection
Note: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6155602