RECONSTRUCTION OF THE SPECTRUM OF AN AUDIOSIGNAL WITH INCOMPLETE SPECTRUM BASED ON FREQUENCY TRANSLATION

摘要

A method/An apparatus for processing an audio signal comprising obtaining a frequency-domain representation of a base band signal having some but not all spectral components of the audio signal; obtaining an estimated temporal envelope of at least a portion of the audio signal; obtaining an estimated spectral envelope of a residual signal having spectral components of the audio signal that are not in the base band signal; assembling data representing the frequency-domain representation of the base band signal, the estimated temporal envelope of at least a portion of the audio signal and the estimated spectral envelope into an output signal suitable for transmission or storage.