APPARATUS, METHOD AND COMPUTER PROGRAM FOR GENERATING A REPRESENTATION OF A BANDWIDTH-EXTENDED SIGNAL ON THE BASIS OF AN INPUT SIGNAL REPRESENTATION USING A COMBINATION OF A HARMONIC BANDWIDTH-EXTENSION AND A NON-HARMONIC BANDWIDTH-EXTENSION

摘要

AN APPARATUS FOR GENERATING A REPRESENTATION OF A BANDWIDTH-EXTENDED SIGNAL ON THE BASIS OF AN INPUT SIGNAL REPRESENTATION COMPRISES A PHASE VOCODER CONFIGURED TO OBTAIN VALUES OF A SPECTRAL DOMAIN REPRESENTATION OF A FIRST PATCH OF THE BANDWIDTH-EXTENDED SIGNAL ON THE BASIS OF THE INPUT SIGNAL REPRESENTATION. THE APPARATUS ALSO COMPRISES A VALUE COPIER CONFIGURED TO COPY A SET OF VALUES OF THE SPECTRAL DOMAIN REPRESENTATION OF THE FIRST PATCH, WHICH VALUES ARE PROVIDED BY THE PHASE VOCODER, TO OBTAIN A SET OF VALUES OF A SPECTRAL DOMAIN REPRESENTATION OF A SECOND PATCH, WHEREIN THE SECOND PATCH IS ASSOCIATED WITH HIGHER FREQUENCIES THAN THE FIRST PATCH. THE APPARATUS IS CONFIGURED TO OBTAIN THE REPRESENTATION OF THE BANDWIDTH-EXTENDED SIGNAL USING THE VALUES OF THE SPECTRAL DOMAIN REPRESENTATION OF THE FIRST PATCH AND THE VALUES OF THE SPECTRAL DOMAIN REPRESENTATION OF THE SECOND PATCH.