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

摘要

The fast Newton transversal filter (FNTF) family of adaptive filtering algorithms bridges the performance gap between the standard normalized least-mean-sequare (NLMS) and fast recursive least-sequares (FRLS) algorithms by allowing the use of linear predictors with variable orders. Recently, it has been shown the FNTF is an effective scheme for fullband acoustic echo cancellation (AEC) of short echo paths (e.g., mobile context). In this paper, the merits of FNTF for subband AEC of the long echo paths typically associate with the use of hands-free audio terminals in offices (e.g., audioconferencing) are investigated. To this end, a stabilized version of FNTF is incorporated in an oversampled subband structure based on Weaver single-sideband (SSB) modulation.