AUDIO DECODING DEVICE AND AUDIO DECODING METHOD

摘要

Provided is an audio decoding device performing frame loss compensation capable of obtaining a decoded audio which is natural for ears with little noise. The audio decoding device includes: a non-cyclic pulse waveform detection unit (19) for detecting a non-cyclic pulse waveform section in a n-1-th frame which is repeatedly used with a pitch cycle in the n-th frame upon compensation of loss of the n-th frame; a non-cyclic pulse waveform suppression unit (17) for suppressing a non-cyclic pulse waveform by replacing an audio source signal existing in the non-cyclic pulse waveform section in the n-1-th frame by a noise signal; and a synthesis filter (20) for using a linear prediction coefficient decoded by an LPC decoding unit (11) to perform synthesis by a synthesis filter by using the audio source signal of the n-1-th frame from the non-cyclic pulse waveform suppression unit (17) as a drive audio source, thereby obtaining the decoded audio signal of the n-th frame.