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• W2116766578 abstract "Despite several recent proposals to achieve blind source separation (BSS) for realistic acoustic signals, the separation performance is still not good enough. In particular, when the impulse responses are long, performance is highly limited. In this paper, we consider a two-input, two-output convolutive BSS problem. First, we show that it is not good to be constrained by the condition T>P, where T is the frame length of the DFT and P is the length of the room impulse responses. We show that there is an optimum frame size that is determined by the trade-off between maintaining the number of samples in each frequency bin to estimate statistics and covering the whole reverberation. We also clarify the reason for the poor performance of BSS in long reverberant environments, highlighting that the framework of BSS works as two sets of frequency-domain adaptive beamformers. Although BSS can reduce reverberant sounds to some extent like adaptive beamformers, they mainly remove the sounds from the jammer direction. This is the reason for the difficulty of BSS in reverberant environments." @default.
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• W2116766578 date "2003-03-01" @default.
• W2116766578 modified "2023-10-17" @default.
• W2116766578 title "The fundamental limitation of frequency domain blind source separation for convolutive mixtures of speech" @default.
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• W2116766578 doi "https://doi.org/10.1109/tsa.2003.809193" @default.
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