ENCODING AND DECODING DEVICES, METHODS AND PROGRAMS

摘要

An encoding device ( 200 ) includes: a time characteristic extracting unit ( 203 ) that specifies a band for a part of a frequency spectrum based on a characteristic of an audio input signal in a time domain; a time transforming unit ( 204 ) that transforms a signal in the specified band to a signal according to frequency-time transform; and an encoded data stream generating unit ( 205 ) that encodes the signal obtained by the time transforming unit ( 204 ) and at least a part of the frequency spectrum, and generates an output encoded data stream from the encoded signal and the encoded frequency spectrum.