Title :
A variable step-size frequency-domain adaptive filtering algorithm for stereophonic acoustic echo cancellation
Author :
Romoli, Laura ; Squartini, Stefano ; Piazza, Francesco
Author_Institution :
A3Lab., Univ. Politec. delle Marche, Ancona, Italy
Abstract :
In this paper a gradient adaptive step-size algorithm for frequency domain adaptive filtering is proposed: the step-size adaptation is performed by differentiating the time-domain block error at the output of the block adaptive filter with respect to the step-size. By using the results obtained through a rigorous mathematical treatment in the single-channel situation and in the presence of a partitioned adaptive filter, an adaptation rule valid for two-channel adaptive algorithms, which may be easily extended to multi-channel adaptive algorithms, is derived. Experimental results concerning stereophonic acoustic echo cancellation are reported, in order to validate the effectiveness of the proposed algorithm.
Keywords :
adaptive filters; echo suppression; gradient methods; block adaptive filter; gradient adaptive step-size algorithm; partitioned adaptive filter; stereophonic acoustic echo cancellation; time-domain block error; variable step-size frequency-domain adaptive filtering algorithm; Adaptive algorithms; Convergence; Echo cancellers; Frequency-domain analysis; Signal processing algorithms;
Conference_Titel :
Signal Processing Conference, 2010 18th European
Conference_Location :
Aalborg