Patent ID: 7359854
Filing Date: 2008-04-15
Classification: G10L

Abstract:
1. A method of producing in a signal decoder, a wide-band acoustic signal (a WB ) based on a narrow-band acoustic signal (a NB ), the spectrum (A WB ) of the wide-band acoustic signal (a WB ) having a larger bandwidth than the spectrum (A NB ) of the narrow-band acoustic signal (a NB ), the method comprising: receiving the narrow-band acoustic signal (a extracting by a feature extraction unit, at least one essential attribute (z estimating by a parameter estimation unit, a parameter describing aspects of wide-band frequency components outside the spectrum (A deriving by a confidence level derivation unit, a confidence level which reflects a probability that an estimated parameter value accurately describes a particular wide-band frequency component; allocating by the signal decoder, the estimated parameter value to the particular wide-band frequency component based on the derived confidence level, wherein the estimated parameter value is allocated such that: outputting the wide-band acoustic signal (a