Patent ID: 7016502

Claim:
An encoding device for encoding an acoustic time-series signal, comprising: band separating means for separating an input acoustic time-series signal into N bands and generating N band signals; normalization coefficient generating means for generating a predetermined normalization coefficient for each of the band signals; normalization means for normalizing the band signals on the basis of the generated normalization coefficients; quantization accuracy information generating means for generating quantization accuracy information for each of the band signals; quantization means for quantizing each of the normalized band signals on the basis of the quantization accuracy information; a plurality of normalization coefficient encoding means for encoding the N normalization coefficients, which are generated by the normalization coefficient generating means; first selection means for selecting one of the normalization coefficient encoding means on the basis of the amount of encoding in a case in which the N normalization coefficients are encoded by each of the normalization coefficient encoding means; and multiplexing means for multiplexing the N normalization coefficients, which are encoded using the normalization coefficient encoding means selected by the first selection means, and each of the band signals, which are output by the quantization means.