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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2005

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A two-step approach to blind deconvolution of speech and sound sources in the time domain

Okazaki F.A., Kasprzak W.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2005

Vol. 53, nr 1

49-55

In order to understand commands given through voice by an operator, user or any human, a robot needs to focus on a single source, to acquire a clear speech sample and to recognize it. A two-step approach to the deconvolution of speech and sound mixtures in the time-domain is proposed. At first, we apply a deconvolution procedure, constrained in the sense, that the de-mixing matrix has fixed diagonal values without non-zero delay parameters. We derive an adaptive rule for the modification of the de-convolution matrix. Hence, the individual outputs extracted in the first step are eventually still self-convolved. This corruption we try to eliminate by a de-correlation process independently for every individual output channel.