Gabor expansion for stereophonic acoustic echo cancellation
L. Parolini, S. Bartoloni, Francesco Piazza · 2002
In hands-free stereophonic devices, a stereo acoustic echo canceller is usually included. This however can exhibit convergence problems caused by the strong cross-correlation between the signals of the two channels. In this paper a new stereo acoustic echo cancellation structure based on the Gabor expansion is presented, which allows one to get better performance than other classical solutions, both in terms of complexity and misalignment. In fact, the decorrelating and whitening capabilities of the Gabor expansion, recently proposed for monophonic echo cancellation, allow one to avoid the use of cross-filters and make the adaptive filtering in each sub-band more effective.