Patent ID: 8898057

Claim:
An encoding apparatus that performs band enhancement using a low-band side spectrum and generates a high-band side spectrum, the encoding apparatus comprising: a band setter that inputs an input signal of a frequency domain and uses a characteristic of the input signal of the frequency domain as a basis, or inputs the input signal of the frequency domain and a coding parameter and uses at least one of the coding parameter and a characteristic of the input signal of the frequency domain as a basis, for generating band setting information that decides a first band of a high-band side set by the band enhancement; and a high-band encoder that encodes the input signal of the first band decided based on the band setting information and generates high-band part coded information, wherein the band setter generates the band setting information that decides the first band and a low-band side second band by dividing the frequency domain into the first band and the second band, the encoding apparatus further comprising: a fixed-band encoder that encodes the input signal of a band fixed beforehand in a low-band part of the second band and generates fixed-band coded information; and a low-band encoder that encodes a difference between the input signal of the second band and the input signal of the fixed band and generates low-band part coded information.