FIELD: information technology.
SUBSTANCE: method involves receiving (101) an input digital audio signal containing a narrow-band signal. The input digital audio signal is processed (102) to generate a processed digital audio signal. The high-band energy level corresponding to the input digital audio signal is estimated (103), based on an estimated transition-band energy of the processed digital audio signal within a predetermined upper frequency range of a narrow-band bandwidth. A high-band digital audio signal is generated (104) based on the high-band energy level and an estimated high-band spectrum corresponding to the high-band energy level.
EFFECT: possibility of generating speech with an extended bandwidth with minimum number of distortions.
10 cl, 6 dwg
