Pavel Zahradnik


A simple yet powerful procedure for an echo attenuation in signals is introduced. The presented method involves no external reference signal. It is based on comb FIR filtering. To the advantages of the described method belong the simplicity and performance which are beneficial in real time implementations. For illustration, a simulation of the procedure is included. The efficiency of the presented method is demonstrated by a real time implementation on a digital signal processor.


Echo attenuation, single-channel, autocorrelation, comb filter, real- time implementation, digital signal processor


HANSLER, E., SCHMIDT, G., Single-Channel Acoustic Echo Cancellation, in J. Benesty, Y. Huang (eds.), Adaptive Signal Processing, Springer, Berlin, 2003, p. 59-93.

MAHBUB, U., FATTAH, S. A., Gradient Based Adaptive Filter Algorithm for Single Chan- nel Acoustic Echo Cancellation in Noise, 7th International Conference on Electrical and Computer Engineering, Dhaka, Bangladesh, December 2012, p. 880-883.

MAHBUB, U., FATTAH, S. A., A Single-Channel Acoustic Echo Cancellation Scheme Using Gradient-Based Adaptive Filtering, Circuits and Systems Signal Processing, Vol. 32, Iss. 5, 2014, p. 1541-1572, DOI 10.1007/s00034-013-9715-z.

SCALART, P., BOUTEILLE, F., On Integrating Speech Coding Functions into Echo Cancelling Filters with Decorrelating Properties, IEEE International Conference on Acoustics, Speech, and Signal Processing ICASSP 2002, Vol. 2, p. 1905-1908, DOI:10.1109/ICASSP.2002.5745000. [5] RUPP, M., A Family of Adaptive Filter Algorithms with Decorrelating Properties, IEEE Transactions on Signal Processing, Vol. 46, No. 3, 1998, p. 771-775.

BERSHAD, N. J., LINEBARGER, D., McLAUGHLIN, S., A Stochastic Analysis of the Affine Projection Algorithm for Gaussian Autoregressive Inputs, IEEE International Con- fonference on Acoustics, Speech, and Signal Processing, USA, 2001, Vol. 6, p. 3837 - 3840.

http://www.ti.com/tool/tmdxlcdk138 [Online.

http://www.ti.com/product/omap-l138 [Online.

DOI: http://dx.doi.org/10.14311/NNW.1901.%25x


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