A New Echo Cancellation Algorithm without Double-Talk Detection Based on Correlation Function

作者：Sun LiJun^*; Zhang ShouYong; Wang WeiSheng; Zhang XiaoNing

来源：International Conference on Automation, Communication, Architectonics and Materials, 2011-06-18 to 2011-06-19.

DOI：10.4028/www.scientific.net/AMR.225-226.996

• Adaptive Echo Canceller
• Double-Talk (dt)
• Echo Path Change (epc)

In an adaptive echo canceller, the detection algorithm able to distinguish echo path change (EPC) from double-talk (DT) is vital to ensure that adaptive filter tap coefficients are updated in case of EPC and frozen during the DT period. The paper presents a new echo cancel algorithm, which can protect the adaptive filter performance during double-talk in acoustic echo cancellation of teleconference without setting a detector. A judgment value can be directly used in the iteration formula to control the iteration speed of the filter, which composed of the correlation of the far-end signal and near-end received signal, the pre-correlation of the error signal. The computer simulation results verify that the mentioned algorithm has the good double talk protection performance, and it is very useful and efficient in distinguishing EPC from DT but with less computational complexity contrast to the congener algorithm.

• 出版日期2011
• 单位河南工业大学