On the use of the FNTF algorithm in subband acoustic echo cancellation

Benoit Champagne, Francois Caron

Abstract


Acoustic echo cancellation (AEC) is an effective approach for the control of acoustic echoes generated by hands-free terminals. A fast Newton transversal filter (FNTF) algorithm models the excitation signal as an AR(M) process, where 0&leM&leN, and achieves a complexity of 2 N+12 M. The performance of FNTF in a subband AEC structure is examined, with emphasis on the identification of long echo paths typical of teleconference applications.

Keywords


Adaptive filtering; Algorithms; Mathematical models; Teleconferencing; Acoustic echo cancellation (AEC); Fast Newton transversal filters (FNTF)

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