Patent ID: 6122609
Filing Date: 2000-09-19
Classification: H04R

Abstract:
A method of optimized processing of a disturbing signal consisting at least of a noise signal during a sound capture, on the basis of an observation signal formed of an original useful signal and of said disturbing signal, wherein, for a processing of said disturbing signal in the frequency domain, said method consists in performing:a frequency transform of said observation signal so as to generate a first transformed signal which is representative, in the frequency domain, of said observation signal;an estimation of said disturbing signal so as to generate an estimated disturbing signal;an estimation of said original useful signal so as to generate an estimated useful signal, estimation of said original useful signal being performed by estimating on the basis of said first transformed signal a signal representative of the power spectral density of said observation signal;a filtering of said observation signal on the basis of said estimated disturbing signal and of an optimal filtering so as to generate a useful signal, said optimal filtering being applied to said signal representative of the power spectral density of said observation signal so as to minimize the error between said useful signal and said estimated useful signal, said estimated useful signal converging towards said original useful signal for a substantially zero error between said useful signal and said estimated useful signal.