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A SPARSENESS CONTROLLED PROPORTIONATE ALGORITHM FOR ACOUSTIC ECHO CANCELLATION

A SPARSENESS CONTROLLED PROPORTIONATE ALGORITHM FOR ACOUSTIC ECHO CANCELLATION. Pradeep Loganathan, Andy W.H. Khong, Patrick A. Naylor. pradeep.loganathan@ic.ac.uk, andykhong@ntu.edu.sg, p.naylorg@ic.ac.uk. Contents. Introduction Review of NLMS & PNLMS The SC-PNLMS algorithm

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A SPARSENESS CONTROLLED PROPORTIONATE ALGORITHM FOR ACOUSTIC ECHO CANCELLATION

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  1. A SPARSENESS CONTROLLED PROPORTIONATE ALGORITHM FOR ACOUSTIC ECHO CANCELLATION Pradeep Loganathan, Andy W.H. Khong, Patrick A. Naylor pradeep.loganathan@ic.ac.uk, andykhong@ntu.edu.sg, p.naylorg@ic.ac.uk

  2. Contents • Introduction • Review of NLMS & PNLMS • The SC-PNLMS algorithm • Simulation Results • Complexity • Conclusion A Sparseness Controlled Proportionate Algorithm for AEC

  3. Improving the performance of PNLMS • Sparse → low value of ρ • Dispersive → high value of ρ PNLMS: Normalized misalignment: A Sparseness Controlled Proportionate Algorithm for AEC

  4. Conclusion • Algorithms developed for mobile hands-free terminals are required to be • robust to the variations in the sparseness of the acoustic path. • SC-PNLMS: Sparseness measure has been incorporated into PNLMS. • Sparseness measured using estimated impulse response. • Modest increase in computational complexity • Outperformed across all sparseness levels. A Sparseness Controlled Proportionate Algorithm for AEC

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