To set an initial value of learning of a separating filter for achieving a convergence to a right separating filter without convergence to an improper separating filter value.
In the signal extraction method and apparatus, a calculation part is provided with a sensor array composed of a plurality of sensors m1 and m2, and calculates a filter for minimizing an output by compensating a delay time difference D of observation signals x1 and x2 of the plurality of sensors caused by an arrival time difference θ of sonic waves at the respective sensors. A set of such a calculation part is provided for each source signal, and a calculation part for the filter is provided for inputting the filter as an initial value of learning and learning the separating filter by inputting the observation signals x1 and x2.
MAKINO SHOJI
MUKAI MAKOTO
SAWADA HIROSHI
SARUWATARI HIROSHI
