Patent ID: 8249882

Claim:
A decoding apparatus that decodes an audio signal by decoding a first encoded data that is encoded into a first time range from a low-frequency component of the audio signal, and by decoding a second encoded data that is encoded into a second time range from a high-frequency component of the audio signal, the second encoded data is used when creating a high-frequency component of the audio signal from the low-frequency component, the decoding apparatus comprising: a high-frequency compensating device that changes the second time range to a third time range corresponding to the first time range, and compensates the high-frequency component created from the second encoded data based on the first time range such that an electric power of the high-frequency component in the third time range after compensation becomes sum of an electric power of the high-frequency component in the third time range before compensation and an electric power of the high-frequency component in a time range obtained by subtracting the third time range from the second time range before compensation; and a decoding device that decodes the audio signal by synthesizing the high-frequency component compensated by the high-frequency compensating device, and the low-frequency component decoded from the first encoded data.