Patent ID: 6801889
Filing Date: 2004-10-05
Classification: G10L

Abstract:
Process for reducing noise signals in telecommunications (TC) systems for the transmission of acoustic useful signals, in particular human speech, with the following steps:(a) Determining by means of speech pause detection when a speech signal is contained in the mixture of useful signals and interference signals to be transmitted, or when a speech pause is present; (b) Branching the incoming TC signal from the main signal path and using a Fourier transformation on the branched TC signal to generate a frequency spectrum of the branched TC signal; (c) Storing in a buffer memory (3) the last frequency spectrum recorded during the last speech pause; (d) Using an inverse Fourier transformation on the last respective recorded frequency spectrum to generate a simulated noise signal; (e) Subtracting the simulated noise signal in the time domain from the current incoming TC signal.