AUDIO ENCODING DEVICE, METHOD AND PROGRAM, AND AUDIO DECODING DEVICE, METHOD AND PROGRAM

摘要

An encoding unit for encoding an audio signal comprising multiple frames is provided with an audio encoding unit for encoding the audio signal, and an auxiliary information encoding unit for deducing and encoding auxiliary information which, used in packet loss concealment at audio signal decoding, relates to the change over time of the power of the audio signal. Included in the aforementioned auxiliary information relating to the power change over time may be parameters of a function approximating the power over multiple subframes shorter than one frame, and may include information relating to a vector obtained by vector quantization of power over multiple subframes shorter than one frame.