DIGITAL SIGNAL REGENERATION APPARATUS AND DIGITAL SIGNAL COMPRESSION APPARATUS

摘要

The judgment of a section including a human voice is carried out by a small number of arithmetic operations. A digital signal regeneration apparatus comprises an audio decoder which decodes an audio bit stream and outputs an audio signal thus obtained, an audio bit stream analyzer which analyzes whether the audio bit stream includes a human voice or not, a regeneration speed determination unit which determines a regeneration speed on the basis of the result of analysis by the audio bit stream analyzer, and a variable speed regeneration unit which regenerates the audio signal in accordance with the regeneration speed determined by the regeneration speed determination unit.