Title :
A robust proportionate affine projection algorithm for network echo cancellation
Author :
Gansler, T. ; Benesty, Jacob ; Gay, Steven L. ; Sondhi, M. Mohan
Author_Institution :
AT&T Bell Labs., Murray Hill, NJ, USA
Abstract :
Echo cancelers which cover longer impulse responses (⩾64 ms) are desirable. Long responses create a need for more rapidly converging algorithms in order to meet the specifications for network echo cancelers devised by the ITU (International Telecommunication Union). In general, faster convergence implies a higher sensitivity to near-end disturbances, especially “double-talk.” Previously, a fast converging algorithm called the proportionate NLMS (normalized least mean squares) algorithm (PNLMS) has been proposed. This algorithm exploits the sparseness of the echo path in order to increase the convergence rate. A robust version of PNLMS has also been presented which combines a double-talk detector with techniques from robust statistics to make the algorithm insensitive to double-talk. This paper presents a generalization of the robust PNLMS algorithm to a robust proportionate aAffine projection algorithm (APA) called PAPA that converges very fast
Keywords :
adaptive filters; convergence of numerical methods; echo suppression; least mean squares methods; transient response; PAPA; PNLMS; converging algorithms; double-talk; echo path; long responses; near-end disturbances; network echo cancellation; normalized least mean squares algorithm; proportionate NLMS; robust proportionate aAffine projection algorithm; robust proportionate affine projection algorithm; Adaptive filters; Convergence; Detectors; Echo cancellers; Filtering algorithms; Jacobian matrices; Projection algorithms; Robustness; Speech enhancement; Statistics;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.859079