Patent ID: 7496482
Filing Date: 2009-02-24
Classification: G06K,G10L

Abstract:
1. A signal separation method that separates and extracts signals under conditions where N (N≧2) signals are mixed together and observed with M sensors, comprising: a procedure that transforms the observed signal values observed by said sensors into frequency-domain signal values, a procedure that uses said frequency-domain signal values to calculate at each frequency the relative values of the observed values between said sensors (including mapping these relative values), a procedure that clusters said relative values into N clusters, a procedure that calculates a representative value for each of said clusters, a procedure that uses said representative values to generate a mask for the purpose of extracting, from said frequency-domain signal values, mixed signal values comprising the signals emitted from V (2≦V≦M) signal sources, a procedure that uses said mask to extract said mixed signal values from said frequency-domain signal values, and a procedure that separates and extracts the values of V signals from said mixed signal values.