SOUND DECODING DEVICE, SOUND ENCODING DEVICE, SOUND DECODING METHOD, SOUND ENCODING METHOD, SOUND DECODING PROGRAM, AND SOUND ENCODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To improve the quality by reducing the distortion in a time region of a component in a frequency band encoded with a small number of bits.SOLUTION: A sound decoding device 10 decodes an encoded sound signal and outputs the decoded sound signal. A decoding unit 10a decodes an encoded series including the encoded sound signal to obtain a decoded signal. A selective time envelope shaping unit 10b shapes the time envelope of the frequency band of the decoded signal on the basis of decode related information about the decode of the encoded series.