AUDIO ENCODING AND DECODING DEVICE

摘要

An encoding device ( 100 ) includes (i) a first encoding unit ( 132 ) that encodes spectral data in the lower frequency band represented by a plularity of parameters, out of the spectral data obtained by transforming an audio signal inputted for a fixed time length, (ii) a second quantizing unit ( 133 ) that generates sub information representing characteristics of the spectral data in the higher frequency by fewer parameters than those for the lower frequency band, out of the spectral data obtained by the transformation, (iii) a second encoding unit ( 134 ) that encodes the generated sub information, and (iv) a stream output unit ( 140 ) that outputs the data encoded by the first encoding unit ( 132 ) and the data encoded by the second encoding unit ( 134 ).