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

摘要

The bandwidth extension parameter generation device (306) includes an extraction unit (303) that extracts a high frequency signal indicating a high frequency portion of an input sound signal, and a tone parameter that indicates the magnitude of energy of a tone component in the high frequency signal. And a calculation unit (304) for calculating a floor parameter indicating the magnitude of the energy of the floor component that is a component from which the tone component of the high frequency signal is removed.