| 摘要 |
An encoding unit for encoding an audio signal consisting of a plurality of frames is provided with an audio encoding unit for encoding the audio signal, and an auxiliary information encoding unit for estimating and encoding auxiliary information about a temporal change of power of the audio signal, which is used in packet loss concealment in decoding of the audio signal. The auxiliary information about the temporal change of power may contain a parameter that functionally approximates a plurality of powers of subframes shorter than one frame, or may contain information about a vector obtained by vector quantization of a plurality of powers of subframes shorter than one frame. |
