| 摘要 |
An audio decoding device includes a spatial information decoding unit configured to decode, using a first channel signal and a second channel signal included in a plurality of channels of an audio signal having a first frequency range and a second frequency range, a first prediction coefficient of the first frequency range and a second prediction coefficient of the second frequency range, both selected from a code book when prediction-encoding a third channel signal that is not subjected to prediction encoding and that is included in the plurality of channels; a residual signal decoding unit configured to decode a residual signal included in the first frequency range, the residual signal representing an error occurring in prediction encoding; and a prediction decoding unit configured to prediction-decode the third channel signal subjected to prediction-encoding in the second frequency range from the first channel signal, the second channel signal, the third channel signal subjected to prediction encoding, the first prediction coefficient, and the residual signal of the first frequency range and the first channel signal and the second channel signal of the second frequency range. |
