US 7,010,514 B2 · Blind signal separation system and method, blind signal separation program and recording medium thereof

Abstract

The present invention enable to separate source signals from mixture signals into which the source signals are mixed temporally and spatially, where the number of source signals is more than or equal to the number of mixture signals. A signal storing portion 12 stores the mixture signals input into a signal input portion 11, and a formulation portion 131 in a signal separation portion 13 extracts the mixture signals stored in the signal storing portion 12 and formulates them as an operation expression using a basis matrix composed of plural small matrixes that consist of bases with time symmetry. A learning algorithm application portion 132 applies a learning algorithm based on overcomplete representations, a mixture matrix calculating portion 133 calculates a mixture matrix, a source signal estimating portion 134 estimates source signals separated from the mixture signals, and an output portion 14 outputs the calculated mixture matrix and the estimated source signals.

Claims6

Dependent claims

A blind signal separation system for separating plural source signals before mixture from mixture signals having said source signals mixed temporally and spatially, comprising:

signal input means for inputting said mixture signals;
signal storing means for storing said input mixture signals;
and
signal separation means for extracting the mixture signals stored in said signal storing means and separating said source signals from said extracted mixture signals,
wherein said signal separation means formulates said extracted mixture signals as an operation expression using a basis matrix composed of plural small matrixes which consist of the bases with time symmetry around the time axis shifted, and calculates a mixture matrix to produce said mixture signals by mixing said source signals temporally and spatially, and estimates said source signals to be separated, using said operation expression and the learning algorithm based on said overcomplete representations.

2 more elements

Dependencies are inferred from the claim text.

Blind signal separation system and method, blind signal separation program and recording medium thereof

Life of this patent

Blind signal separation system and method, blind signal separation program and recording medium thereof

Life of this patent

Abstract

Claims6