Patent ID: 8239208
Filing Date: 2012-08-07
Classification: G10L

Abstract:
1. A method of enhancing spectral content of a decoded signal, the signal having an incomplete spectrum including a first spectral frequency band, said method comprising the following steps: performing at least one translation of the spectral content of said first frequency band into a second frequency band excluded from said spectrum to generate a translated-spectrum signal, filtering the incomplete spectrum signal through a bank of analysis filters and applying output signals from said bank of analysis filters to inputs of translated ranks of inputs of a bank of synthesis filters to generate a translated-spectrum signal having a spectrum restricted to said second spectral frequency band; shaping the spectrum of the translated-spectrum signal to produce an enhancement signal; and adding the enhancement signal to the incomplete spectrum signal to produce an enhanced-spectrum signal, the generation of the translated-spectrum signal including whitening said spectral content by applying a whitening filter to said first spectral frequency band so that the spectrum of the translated-spectrum signal is a whitened version of said spectral content.