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Acoustic Echo Cancellation using LMS Algorithm

saurabh Rai Dhirendra Prasad, Shrinivas A Patil, Bhalchandra B Godbole

Abstract


Echo results due to reflection of sound waves from various surfaces like walls, mountain, curtains etc. When the reflected sound arrives after more than 0.1s of the original sound, then it is heard distinctly, and called as echo. Echo may be some times desirable and pleasant but especially in telecommunication, echoes are erroneous. There are two types of echo that arise in telecommunication, viz. acoustic echo and line echo. Both these echoes can be minimized using echo cancellers. So, in this article, an echo canceller based on least mean square (LMS) algorithm has been discussed and implemented. The effect of convergence parameter (µ) on the filter behaviour is also studied.

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References


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DOI: https://doi.org/10.37628/jbcc.v2i2.369

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