APPARATUS, METHOD AND MEDIA WITH PROGRAMME CODE FOR GENERATING REPRESENTATION OF BANDWIDTH-EXTENDED SIGNAL ON BASIS OF INPUT SIGNAL REPRESENTATION USING COMBINATION OF HARMONIC BANDWIDTH-EXTENSION AND NON-HARMONIC BANDWIDTH-EXTENSION

摘要

FIELD: information technology.;SUBSTANCE: apparatus for generating a representation of a bandwidth-extended signal on the basis of an input signal representation (110) includes a phase vocoder (130) configured to obtain values (β_ζ…β_2ζ) 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 includes a value copier (140) configured to copy a set of values (β_ζ…β_2ζ) of the spectral domain representation of the first patch, which values are provided by the phase vocoder, to obtain a set of values (23) 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 (120) 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.;EFFECT: improved tradeoff between complexity and audio quality of the bandwidth-extended signal.;17 cl, 10 dwg