Two Time-Frequency Ratio-Based Blind Source Separation Methods for Time-Delayed Mixtures
We propose two time-frequency (TF) blind source separation (BSS) methods suited to attenuated and delayed (AD) mixtures. They consist in identifying the columns of the (filtered permuted) mixing matrix in Constant-Time TF zones where they detect that a single source occurs, using TIme-Frequency Ratios Of Mixtures (hence their name AD-TIFROM-CT). We thus identify columns of scale coefficients and time shifts. Unlike various previously reported TF-BSS approaches, these methods set very limited constraints on the source sparsity and overlap. They are especially suited to non-stationary sources.
KeywordsTime Shift Independent Component Analysis Blind Source Separation Analysis Zone Unwraped Phase
Unable to display preview. Download preview PDF.
- 2.Jourjine, A., Rickard, S., Yilmaz, O.: Blind separation of disjoint orthogonal signals: Demixing N sources from 2 mixtures. In: Proceedings of ICASSP 2000, June 5-9, vol. 5, pp. 2985–2988. IEEE Press, Istanbul (2000)Google Scholar
- 4.Deville, Y.: Temporal and time-frequency correlation-based blind source separation methods. In: Proceedings of ICA 2003, Nara, Japan, April 1-4, pp. 1059–1064 (2003)Google Scholar