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An Improved Transfer Logic of the Two-Path Algorithm for Acoustic Echo Cancellation

Authors: Chang Liu, Zishu He


Adaptive echo cancellers with two-path algorithm are applied to avoid the false adaptation during the double-talk situation. In the two-path algorithm, several transfer logic solutions have been proposed to control the filter update. This paper presents an improved transfer logic solution. It improves the convergence speed of the two-path algorithm, and allows the reduction of the memory elements and computational complexity. Results of simulations show the improved performance of the proposed solution.

Keywords: Acoustic echo cancellation, Echo return lossenhancement (ERLE), Two-path algorithm, Transfer logic

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[1] J. Benesty, D. R. Morgan, and J. H. Cho, "A new class of doubletalk detectors based on cross-correlation," IEEE Transactions on. Speech and Audio Process, vol. 8, no. 2, pp. 168-172, Mar. 2000.
[2] T. Gansler, H. Hansson, C. J. Ivarsson and G. Salomonsson, "A double-talk detector based on coherence," IEEE Transactions on Communication , vol. 44, no. 11, pp. 1421-1427, Nov. 1996.
[3] A. Mader, H. Puder, and G. U. Schmit, "Step-size control for acoustic cancellation filters-An overview," Signal process, vol. 80, pp. 1697-1719, 2000.
[4] D. L. Duttweiler, "A twelve-channel digital echo canceler," IEEE Transactions on Communication, vol. COM-26, no. 5, pp. 647-653, May. 1978.
[5] K. Ochiai, T. Araseki, and T. Ogihara, "Echo canceler with two echo path models," IEEE Transactions on Communication, vol. COM-25, no. 6, pp. 8-11, May. 1977.
[6] F. Lindstrom, C. Schuldt and I. Claesson, "An improvement of the two-path algorithm transfer logic for acoustic echo cancellation," IEEE Transactions on Audio Speech and Language Process., vol. 15, no. 4, pp. 1320-1326, May. 2007.
[7] F. Lindstrom, C. Schuldt and I. Claesson, "The two-path algorithm for line echo cancellation," in Proceedings of the IEEE Tencon, vol. 1, pp. 637-640, Nov .2004.
[8] J. Benesty and S. L. Gay, "An improved PNLMS algorithm, "An improved PNLMS algorithm," in Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP) , vol. 2, pp. 857-860, May 1999.
[9] J. Liu, "A novel adaptation scheme in the nlms algorithm for the echo cancellation," IEEE Signal Processing Letters., vol. 8, no. 1, pp. 20-22, Jan. 2001.
[10] Y. Haneda, S. Makino, J. Kojima, and S. Shimauchi, "Implementation and evaluation of an acoustic echo canceler using the duo-filter control system," in Proceedings of IWAENC , pp.79-82 ,June. 1995,.
[11] F. Lindstrom, C. Schuldt, M. Langstrom and I. Claesson, "A method for reduced finite precision effects in parallel filtering echo cancellation," IEEE Transactions on Circuits and System-I: Regular Papers.,vol. 54, no. 9, pp. 2011-2018, Sep. 2007.