BLIND SIGNAL SEPARATION SYSTEM AND METHOD, BLIND SIGNAL SEPARATION PROGRAM AND RECORDING MEDIUM THEREOF

摘要

The present invention enable to separate source signals from mixturesignals into which the source signals are mixed temporally and spatially,wherethe number of source signals is more than or equal to the number of mixturesignals. A signal storing portion 12 stores the mixture signals input into asignalinput portion 11, and a formulation portion 131 in a signal separation portion13extracts the mixture signals stored in the signal storing portion 12 andformulatesthem as an operation expression using a basis matrix composed of plural smallmatrixes that consist of bases with time symmetry. A learning algorithmapplication portion 132 applies a learning algorithm based on overcompleterepresentations, a mixture matrix calculating portion 133 calculates a mixturematrix, a source signal estimating portion 134 estimates source signalsseparatedfrom the mixture signals, and an output portion 14 outputs the calculatedmixturematrix and the estimated source signals.