Title :
New configuration of echo canceller adaptable during double talk
Author_Institution :
Tokyo Institute of Technology, Department of Electrical and Electronic Engineering, Faculty of Engineering, Tokyo, Japan
Abstract :
A three-port echo canceller (EC) is proposed. Observing signals on both the 4- and 2-wire paths, the new EC can track echo-path time variances even during double talk (DT), and requires no changeover at the beginning or end of DT, thus eliminating DT detection. The echo synthesiser possesses guaranteed stability without testing.
Keywords :
echo suppression; filtering and prediction theory; speech analysis and processing; 2-wire paths; double talk; echo canceller; echo synthesiser; echo-path time variances; four-wire paths; inverse lattice filter; speech processing; stability; three port configuration;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870909
