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In the context of hands-free mobile telephony, acoustic echo cancellation (AEC) remains an important problem to deal with. This work addresses the study of an acoustic echo canceller controlled by a near-end speech detector. As a matter of fact, the echo canceller is an adaptive filter whose coefficients are disturbed by the presence of speech coming from the near-end speaker. Consequently, it is...
This paper proposes adaptive algorithms for channel equalization in the wavelet packet transform domain. Adaptation to highly correlated time-varying channels is achieved by the use of the orthogonal tree-structured time-varying filter bank associated to this transform. The filter bank structure, that is, the type of decomposition, is obtained, for a fixed number of bands, as the one that leads to...
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