Audio signal encoding apparatus, audio signal decoding apparatus, audio signal encoding process method, audio signal decoding process method, and program

摘要

There is provided a kind of signal coding equipment, comprising: coding unit encodes a quantized value in the frequency spectrum of input signal, passes through multiple encoding operation rules; Which calculates spectral magnitude variable quantity relative to the frequency spectrum based on spectrum envelope for amplitude variations amount accounting unit; And encoding selecting unit, algorithm of the variable quantity in multiple codings of the amplitude of quantized value is distributed according to the encryption algorithm deflection probability of occurrence.