To improve sound quality by performing audio signal reproduction control corresponding to audibility characteristics.

An audibility characteristic storage section 12a stores information on audibility characteristics representing an audibility loss quantity as electric energy of audibility loss for a measurement frequency. An audibility loss quantity correction section 12b converts the measurement frequency used to measure the audibility loss quantity to a frequency band for decoding/reproduction of an audio signal and corrects the audibility loss quantity to generate audibility loss data. A scale factor correction section 13 converts first electric energy of a scale factor of the audio signal into second electric energy corresponding to the audibility loss data and converts the second electric energy into a corrected scale factor as a scale factor after correction. A reverse quantization section 14 performs reverse quantization of the audio signal for each frequency band to generate reversely quantized data. An audio signal reproduction section 15 multiplies the reversely quantized data by the corrected scale factor to reproduce an audio signal which is not encoded.