Patent ID: 8370133
Filing Date: 2013-02-05
Classification: G10L

Abstract:
1. Method for perceptual spectral decoding, comprising the steps of: decoding spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients; spectrum filling of said initial set of spectral coefficients into a set of reconstructed spectral coefficients; said spectrum filling comprising noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients not being decoded from said binary flux equal to elements derived from said decoded spectral coefficients; and converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain, characterised in that said noise filling in turn comprises creation of a spectral codebook dependent on said decoded spectral coefficients, whereby said noise filling of spectral holes comprises setting of spectral coefficients in said initial set of spectral coefficients equal to elements selected from said spectral codebook according to at least one criterion; said elements are selected from said spectral codebook in index order as a circular buffer, starting from a low frequency end.