| 摘要 |
A solution for improving the perceived sound quality of a decoded acoustic signal is accomplished by extending the spectrum of a received narrow-band acoustic signal (a<SUB>NB</SUB>). A wide-band acoustic signal (A<SUB>WB</SUB>) is produced by extracting at least one essential attribute (z<SUB>NB</SUB>) from the narrow-band acoustic signal (a<SUB>NB</SUB>). Parameters, e.g., representing signal energies, with respect to wide-band frequency components outside the spectrum (A<SUB>NB</SUB>) of the narrow-band acoustic signal (a<SUB>NB</SUB>), are estimated based on the at least one essential attribute (z<SUB>NB</SUB>). This estimation involves allocating a parameter value to a wide-band frequency component, based on a corresponding confidence level. |
