Title :
A sparseness controlled proportionate algorithm for acoustic echo cancellation
Author :
Loganathan, Pradeep ; Khong, Andy W. H. ; Naylor, Patrick A.
Author_Institution :
Electr. & Electron. Eng., Imperial Coll. London, London, UK
Abstract :
Sparseness variation in acoustic impulse response arises due to changes in temperature, pressure, acoustic source movements and changes in the acoustic environment. Therefore, the algorithms employed in acoustic echo cancellation have to perform well for both sparse and dispersive unknown systems. The well-known algorithms, normalised least mean square (NLMS) or proportionate NLMS (PNLMS), are limited to perform well either in dispersive or sparse cases, respectively. The proposed sparseness-controlled PNLMS (SC-PNLMS) algorithm inherits the beneficial properties of both PNLMS and NLMS by employing the sparseness measure into the PNLMS algorithm. Simulation results presented show improved performance over the PNLMS algorithm even for dispersive impulse responses.
Keywords :
acoustic signal processing; echo suppression; least mean squares methods; SC-PNLMS algorithm; acoustic echo cancellation; acoustic impulse response; dispersive impulse responses; normalised least mean square; proportionate NLMS algorithm; sparseness controlled proportionate algorithm; Convergence; Dispersion; Echo cancellers; Microphones; Robustness; Signal processing algorithms;
Conference_Titel :
Signal Processing Conference, 2008 16th European
Conference_Location :
Lausanne