CINECA IRIS Institutional Research Information System
IRIS è l’archivio della produzione scientifica della Fondazione Bruno Kessler.
EnglishA new approach to the permutation problem for Blind Source Separation (BSS) in the frequency domain is presented. By means of a state-space representation, the alignment is reduced to a recursive adaptive tracking of state trajectories associated with the demixing matrices. The estimated smooth trajectories are used to initialize the Independent Component Analysis (ICA) in order to force it to converge with a coherent permutation across the whole spectrum. Since permutations are solved with no information about the signal power, this method works also for short utterances (0.51 s) and in highly reverberant environment (T60 ~ 700 ms). Furthermore it is shown that the underlying frequency link, provided by the recursive state estimation, increases the accuracy in the ICA step when only few observations are available.
Scheda prodotto non validato
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte di FBK.
| Titolo: | A BSS method for short utterances by a recursive solution to the permutation problem |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Abstract: | A new approach to the permutation problem for Blind Source Separation (BSS) in the frequency domain is presented. By means of a state-space representation, the alignment is reduced to a recursive adaptive tracking of state trajectories associated with the demixing matrices. The estimated smooth trajectories are used to initialize the Independent Component Analysis (ICA) in order to force it to converge with a coherent permutation across the whole spectrum. Since permutations are solved with no information about the signal power, this method works also for short utterances (0.51 s) and in highly reverberant environment (T60 ~ 700 ms). Furthermore it is shown that the underlying frequency link, provided by the recursive state estimation, increases the accuracy in the ICA step when only few observations are available. |
| Handle: | http://hdl.handle.net/11582/5355 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
http://hdl.handle.net/11582/5355
Copyright © 2020