Patent ID: 6502067
Filing Date: 2002-12-31
Classification: G10L,H04R

Abstract:
A method for processing a sound signal y in which redundant signal profiles are detected within segments of the sound signal and repetitive patterns are detected within said signal profiles, whereby repetitive signal components are allocated to a power component and non-repetitive signal components are allocated to a noise component of the sound signal, wherein said sound signal y is composed of a speech component x and a noise component r, and is processed in each signal segment according to the following steps:a) recording of a large number of sound signal values yk=xk+rk with a sampling interval &tgr;; b) forming a plurality of time delay vectors, each of which consists of components yk whose number m is an embedding dimension and whose numbers k are determined from an embedding window of width mâ€¢&tgr;, wherein for each single one of these vectors a neighborhood U is composed of all delay vectors whose distance to the given one is smaller than a predefined value &egr;; c) determining correlations between the time delay vectors and projection of the time delay vectors onto a number Q of singular vectors; and d) determining signal values that form a speech signal substantially corresponding to said speech component xk, or a noise signal substanially corresponding to said noise component rk.