METHOD AND DEVICE FOR THE ARTIFICIAL EXTENSION OF THE BANDWIDTH OF SPEECH SIGNALS

摘要

The invention relates to a method for artificially expanding the bandwidth of voice signals, said method having the following steps of: a) providing a broadband input voice signal (Siwb(k)); b) using an expansion band of the broadband input voice signal (Siwb(k)) to determine the signal components (Seb(k)) of the broadband input voice signal (Siwb(k)) which are needed to expand the bandwidth; c) determining the temporal envelope of the signal components (Siwb(k)) which are intended for bandwidth expansion; d) determining the spectral envelope of the signal components (Seb(k)) which are intended for bandwidth expansion; e) coding the information relating to the temporal envelope and the spectral envelope and providing the coded information for the purpose of expanding the bandwidth; f) decoding the coded information and using the coded information to generate the temporal envelope and the spectral envelope for the purpose of generating an output voice signal (Swb(k)) whose bandwidth has been expanded. The invention also relates to an apparatus for artificially expanding the bandwidth of voice signals.