| 摘要 |
PURPOSE:To efficiently encode audio signals. CONSTITUTION:In the case of performing the bit allocation of 100k bits to an MDCT coefficient (spectrum data) from an analysis part 34 at a bit allocation part 33, for example, first of all, the 70k bits of them are allocated based on an audition characteristic model stored in an audition characteristic model storage part 32 and the level of the MDCT coefficient outputted from the analysis part 34, for example. Then, the remaining 30k bits are further allocated based on the environmental noise model of an aircraft stored in an environmental noise model storage part 31. |
