Apparatus and method of encoding audio signal by switching frequency domain transformation scheme and time domain transformation scheme

摘要

Provided are an apparatus of encoding an audio signal by switching a time domain transformation scheme and a frequency domain transformation scheme, and an apparatus of decoding an audio signal by switching the time domain transformation scheme and the frequency domain transformation scheme. When any one transformation scheme of the time domain transformation scheme and the frequency domain transformation is switched into the other transformation scheme, an audio signal before and after the switching is encoded using an additionally transformed audio signal, or an encoded audio signal is decoded.