AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF

摘要

An apparatus for processing an audio signal and method thereof are disclosed, by which a band extension scheme can be selectively applied according to a characteristic of an audio signal. The present invention includes receiving a signal and coding scheme information indicating whether a band extension scheme is applied to a current frame of the signal, by an audio processing apparatus, if the coding scheme information indicates that the band extension scheme is applied to the current frame, reconstructing a higher band in the current frame using the band extension scheme, and if the coding scheme information indicates that the band extension scheme is not applied to the current frame, decoding the current frame without using the band extension scheme.