SIGNAL SEPARATING DEVICE, SIGNAL SEPARATING METHOD, INFORMATION RECORDING MEDIUM, AND PROGRAM

摘要

A signal separating device (100) includes an iterative estimator (101), a repeating calculator (102), a result output unit (103), and a repetition controller (104). The repeating calculator (102) repeatedly causes the iterative estimator (101) to iteratively perform independent component analysis on an observed signal matrix X, and to further perform independent component analysis on the source signal matrix obtained as a result. The result output unit (103) outputs the product of the respective mixing matrices obtained during each repetition as a mixing matrix A with respect to the observed signal matrix X, while also outputting the source signal matrix obtained during the final repetition as a source signal matrix S with respect to the observed signal matrix X. The repetition controller (104) causes the repeating calculator (102) to repeat the calculation control until all mixing matrices and all source signal matrices satisfy a convergence condition. The iterative estimator (101) may perform a fixed number of iterations, or perform iterations until convergence is obtained.