TY - JOUR
AU - Kellermann, Walter
AB - For hands‐free acoustic human/machine interfaces, as required, e.g., for automatic speech recognition, teleconferencing, and other multimedia services, microphone arrays using generalized sidelobe cancellers (GSCs) in conjunction with acoustic echo cancellation (AEC) can be efficiently applied for optimum communication. This contribution first devises a hew structure for combining AEC and GSC in the frequency domain. We show that computational complexity is reduced by more than a factor of ten compared to a time‐domain arrangement. Second, robustness issues of the GSC adaptation mechanism are addressed. We illustrate how robust adaptation is assured in the new structure. Third, we propose alternatives for the fixed beamformer part of the GSC, which allow to specify (a) the width of the target tracking region and (b) improve the suppression of low frequencies. GSC robustness constraints are included using linear optimization with configurable penalty functions.
TI - Frequency‐domain integration of acoustic echo cancellation and a generalized sidelobe canceller with improved robustness
JO - Transactions on Emerging Telecommunications Technologies (Electronic)
DO - 10.1002/ett.4460130207
DA - 2002-03-01
UR - https://www.deepdyve.com/lp/wiley/frequency-domain-integration-of-acoustic-echo-cancellation-and-a-4WsSLbxiEQ
SP - 123
EP - 132
VL - 13
IS - 2
DP - DeepDyve
ER -