Bandwidth extension parameter generation device, encoding device, decoding device, bandwidth extension parameter generation method, encoding method, and decoding method

摘要

A bandwidth extension parameter generation device (306) includes: a derivation unit (303) which derives a high-band signal representing a high-band portion of an input sound signal; and a calculation unit (304) which calculates a tone parameter and a floor parameter, the tone parameter indicating a magnitude of energy of a tone component of the high-band signal, the floor parameter indicating a magnitude of energy of a floor component obtained by subtracting the tone component from the high-band signal.