Download E-books Adaptive Identification of Acoustic Multichannel Systems Using Sparse Representations (T-Labs Series in Telecommunication Services) PDF

By Karim Helwani

This ebook treats the subject of extending the adaptive filtering idea within the context of huge multichannel platforms by means of considering a priori wisdom of the underlying process or sign. the place to begin is exploiting the sparseness in acoustic multichannel method so as to remedy the non-uniqueness challenge with a good set of rules for adaptive filtering that doesn't require any amendment of the loudspeaker signals.
The publication discusses intimately the derivation of normal sparse representations of acoustic MIMO systems in sign or procedure based remodel domains. Efficient adaptive filtering algorithms in the rework domain names are offered and the relation among the sign- and the system-based sparse representations is emphasised. moreover, the booklet provides a singular method of spatially preprocess the loudspeaker signs in a full-duplex communique approach. the belief of the preprocessing is to avoid the echoes from being captured by means of the microphone array so that it will aid the AEC procedure. The preprocessing level is given as an exemplarily application of a singular unified framework for the synthesis of sound figures. Finally, a multichannel process for the acoustic echo suppression is presented that can be utilized as a postprocessing level for removal residual echoes. As first of its variety, it extracts the near-end sign from the microphone sign with a distortionless constraint and with out requiring a double-talk detector.

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