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Performance Improvement of Endpoint Detection of Double-Talking Period in the Acoustic Echo Canceller  

Kim, Si-Ho (경북대학교 전자${\cdot}$전기공학부)
Kwon, Hong-Seok (경북대학교 전자${\cdot}$전기공학부)
Bae, Keun-Sung (경북대학교 전자${\cdot}$전기공학부)
Byun, Kyung-Jin (한국전자통신연구원 회로소자연구소)
Abstract
This paper deals with a delay problem in the endpoint detection of double-talk detection algorithm using correlation coefficient in the acoustic echo canceller. In case that past power is much bigger than current power like at the end of double-talking period, the power, estimated using forgetting factor, decreases slowly to cause a delay problem in the endpoint detection. In this paper, two methods are proposed to solve this problem. One is that the current power is periodically replaced by a new average power and the other is that the past power in recursive equation is periodically removed or replaced by other values. The simulation results show that proposed methods outperform conventional method in the endpoint of double-talking periods without increasing the computational burden much more.
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