| 摘要 |
An audio signal encoding device includes a downmix signal encoding unit 203 and an auxiliary information generation unit 204 . The downmix signal encoding unit 203 generates a downmix signal acquired by adding input signals each other using a predetermined method, encodes the downmix signal, and outputs downmix signal information 206 . The auxiliary information generation unit 204 generates auxiliary information 205 using the downmix signal and the downmix signal information 206 generated by the downmix signal encoding unit 203 . The auxiliary information generation unit 204 efficiently quantizes the auxiliary information 205 using human's characteristics of a perceptual direction of a sound source, a perceptual broadening, and a perceptual distance. |
