EP 1141949 A1 20011010 - ELIMINATION OF NOISE FROM A SPEECH SIGNAL

Title (en)

ELIMINATION OF NOISE FROM A SPEECH SIGNAL

Title (de)

GERÄUSCHUNTERDRÜCKUNG AUS EINEM SPRACHSIGNAL

Title (fr)

ELIMINATION DU BRUIT D'UN SIGNAL VOCAL

Publication

EP 1141949 A1 20011010 (EN)

Application

EP 00979526 A 20001027

Priority

EP 00979526 A 20001027
EP 0010713 W 20001027
EP 99203565 A 19991029

Abstract (en)

[origin: WO0131640A1] A method for reducing noise in a noisy time-varying speech input signal y includes receiving the input signal y and deriving a plurality of spectral component signals representing respective magnitudes |Y(k)| of spectral components of the input signal y. A correlation coefficient gamma >sn< is obtained which indicates a correlation in the spectral domain between a clean speech signal component s and a noise signal component n present in the input signal y(y = s + n). Magnitudes of respective noise-suppressed spectral components Ŝ(k) are estimated by solving a correlation equation which gives a relationship between the magnitudes of the respective spectral components |Y(k)| of the noisy input signal y, the spectral components |S(k)| of the clean speech signal s, and the spectral components |N(k)| of the noise signal n, where the equation includes the correlation based on the obtained correlation coefficient gamma >sn<. Preferably, the correlation equation is given by |Y(k)|?a> = |S(k)|<a> + |N(k)|<a> + gamma sn|S(k)||N(k)|.

IPC 1-7

G10L 21/02

IPC 8 full level

G10L 21/02 (2006.01); G10L 21/0208 (2013.01); G10L 21/0216 (2013.01)

CPC (source: EP)

G10L 21/0208 (2013.01); G10L 21/0216 (2013.01)

Citation (search report)

See references of WO 0131640A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

WO 0131640 A1 20010503; EP 1141949 A1 20011010; JP 2003513320 A 20030408

DOCDB simple family (application)

EP 0010713 W 20001027; EP 00979526 A 20001027; JP 2001534144 A 20001027