EM algorithm for convolutive independent component analysis (CICA)
First Claim
Patent Images
1. A method of facilitating blind source separation in convolutive independent component analysis, said method comprising the steps of:
- initializing at least one parameter;
obtaining a set comprising at least one observation;
computing the likelihood of the at least one observation and of an auxiliary function;
maximizing the auxiliary function, and ascertaining whether the likelihood of the at least one observation converges.
1 Assignment
0 Petitions
Accused Products
Abstract
In connection with blind source separation, proposed herein, inter alia, are: expectation-maximization equations to iteratively estimate unmixing filters and source density parameters in the context of convolutive independent component analysis where the sources are modeled with mixtures of Gaussians; a scheme to estimate the length of unmixing filters; and two alternative initialization schemes.
34 Citations
31 Claims
-
1. A method of facilitating blind source separation in convolutive independent component analysis, said method comprising the steps of:
-
initializing at least one parameter;
obtaining a set comprising at least one observation;
computing the likelihood of the at least one observation and of an auxiliary function;
maximizing the auxiliary function, and ascertaining whether the likelihood of the at least one observation converges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. An apparatus for facilitating blind source separation in convolutive independent component analysis, said apparatus comprising:
-
an initializing arrangement which initializes at least one parameter;
an input arrangement which obtains a set comprising at least one observation;
a likelihood computing arrangement which computes the likelihood of the at least one observation and of an auxiliary function;
a maximizing arrangement which maximizes the auxiliary function, and an ascertaining arrangement which ascertains whether the likelihood of the at least one observation converges. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for facilitating blind source separation in convolutive independent component analysis, said method comprising the steps of:
-
initializing at least one parameter;
obtaining a set comprising at least one observation;
computing the likelihood of the at least one observation and of an auxiliary function;
maximizing the auxiliary function; and
ascertaining whether the likelihood of the at least one observation converges.
-
Specification