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Integrated echo and noise canceler for hands-free applications

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4 Author(s)
Seon Joon Park ; Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea ; Chom Gun Cho ; Chungyong Lee ; Dae Hee Youn

An integrated acoustic echo and noise canceler is proposed for hands-free telephony applications. The proposed system includes a computationally efficient double-talk detection (DTD) method and a residual echo cancellation algorithm. The DTD method uses two cross-correlation coefficients and is robust in adverse conditions. In the residual echo cancellation approach, a linear prediction error filter removes the short-term correlation of the residual echo and the resulting whitened residual echo is canceled by a noise-reduction filter. The proposed system was implemented using a general purpose digital signal processor (DSP) with 16-b arithmetic

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:49 ,  Issue: 3 )

Date of Publication:

Mar 2002

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