Global Patent Index - EP 1091349 A2

EP 1091349 A2 2001-04-11 - Method and apparatus for noise reduction during speech transmission

Title (en)

Method and apparatus for noise reduction during speech transmission

Title (de)

Verfahren und Vorrichtung zur Geräuschunterdrückung bei der Sprachübertragung

Title (fr)

Procédé et dispositif pour la réduction de bruit durant la transmission de parole

Publication

EP 1091349 A2 (DE)

Application

EP 00250301 A

Priority

DE 19948308 A

Abstract (en)

The method involves using a multi-layer self-organising neural network with feedback. A minima detection layer, a reaction layer, a diffusion layer and an integration layer define a filter function (F(f,T)) for noise filtering. The filter function is used to convert a spectrum B(f,T) free of noise, into a noise-free speech signal (y(t)) by inverse Fourier transformation. The signal delay caused by processing the signal is so short that the filter can operate in real-time for telecommunication. All neurons are supplied with an externally set parameter K, the size of which defines the degree of noise suppression of the whole filter. An Independent claim is included for an apparatus for noise suppression during speech transmission.

Abstract (de)

Verfahren zur Geräuschunterdrückung bei der Sprachübertragung durch ein mehrschichtiges, selbstorganisierendes, rückgekoppeltes neuronales Netzwerk, mit einer Minimadetektionsschicht, einer Reaktionsschicht, einer Diffusionsschicht und einer Integrationsschicht, die eine Filterfunktion F(f,T) zur Geräuschfilterung bestimmen. <IMAGE>

IPC 1-7 (main, further and additional classification)

G10L 21/02; G06F 15/18

IPC 8 full level (invention and additional information)

G10L 21/0208 (2013.01); G10L 25/30 (2013.01)

CPC (invention and additional information)

G10L 21/0208 (2013.01); G10L 25/30 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1091349 A2 20010411; EP 1091349 A3 20020102; EP 1091349 B1 20050209; AT 289110 T 20050215; CA 2319995 A1 20010406; CA 2319995 C 20050426; DE 19948308 A1 20010419; DE 19948308 C2 20020508; TW 482993 B 20020411; US 6820053 B1 20041116

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