Patent ID: 8285543

Claim:
A method performed by a device for generating a reconstructed signal that comprises: the device receiving a signal containing data representing a baseband signal derived from an audio signal, a noise blending parameter and an estimated spectral envelope; the device obtaining from the data a frequency-domain representation of the baseband signal, the frequency-domain representation comprising baseband spectral components; the device generating a noise signal comprising noise-signal spectral components that are weighted in amplitude by a noise blending function that is a function of frequency and the noise blending parameter and that gives greater weight to spectral components at higher frequencies; the device generating a regenerated signal comprising regenerated-signal spectral components copied from the baseband spectral components in a circular manner into an interval of frequencies and weighted in amplitude by an inverse of the noise blending function; the device generating noisy regenerated spectral components from a combination of the noise-signal spectral components and the regenerated-signal spectral components, wherein amplitudes of the noisy regenerated spectral components are weighted according to the estimated spectral envelope; and the device generating the reconstructed signal from a time-domain representation of the baseband spectral components combined with the noisy regenerated spectral components.