Acoustic Echo Cancellation and Noise Reduction in the Frequency-Domain: A Global Optimisation

The design of an efficient and robust hands-free system is now required by the growth of mobile radio and teleconference communications. The use of Frequency-Domain Adaptive Filters in the context of acoustic echo cancellation has been extensively studied in the literature. These algorithms are wellsuited for long impulse response modeling and for correlated input signals like speech. A global optimisation of a frequency-domain acoustic echo cancellation algorithm with noise reduction is presented in this paper. This optimisation leads to both reduced complexity and improved performances when compared to classical cascaded structures.