AUDIO DECODING DEVICE, AUDIO DECODING METHOD, PROGRAM, AND MOBILE TERMINAL

摘要

It is possible to reduce degradation of audio quality when distributing a music component or a melody to a mobile terminal by a highly efficient audio encoding method. An audio decoding device includes: an audio decoding unit (110) which decodes an inputted bit stream which has been compressed/encoded and outputs the stream; an auditory masking shaping unit (120) which suppresses before output, a signal component which becomes auditorily unnecessary by the auditory masking effect among signal components of the output signal from the audio decoding unit; and switching units (250_1 and 250_2) which judge whether to analyze the feature of the decoded signal before outputting the signal to the frequency conversion unit or to directly output the output of the audio decoding unit.