APPARATUS AND METHOD FOR GENERATING A FREQUENCY ENHANCEMENT SIGNAL USING AN ENERGY LIMITATION OPERATION

摘要

An apparatus for generating a frequency enhancement signal (130), comprises: a signal generator (200) for generating an enhancement signal from a core signal (120), the enhancement signal comprising an enhancement frequency range not included in the core signal, wherein a time portion of the enhancement signal comprises subband signals for a plurality of subbands; a synthesis filterbank (300) for generating the frequency enhanced signal (140) using the enhancement signal (130), wherein the signal generator (200) is configured for performing an energy limitation in order to make sure that the frequency enhanced signal (140) obtained by the synthesis filterbank (300) is so that an energy of a higher band is, at the most, equal to an energy in a lower band or is greater than an energy of a higher band, at the most, by a predefined threshold.