Method for enlarging the band width of a narrow-band filtered voice signal, especially a voice signal emitted by a telecommunication appliance

摘要

A method is provided for expanding the bandwidth of a narrow band filtered speech signal, particularly a speech signal transmitted by a telecommunications device, in a simple and cross-effective manner without losses in quality, wherein the narrow band filtered speech signal is estimated in relation to frequency components above a cut-off frequency via independent methods either in the time domain or in the frequency domain and expanded on the basis of the respective estimation.