METHOD AND DEVICE FOR AUDIO SIGNAL PROCESSING

摘要

PROBLEM TO BE SOLVED: To provide the audio signal processing method which can efficiently detect an auditory break of an audio signal. SOLUTION: A frame division part 1 obtain a constant number of past sample sequences in very certain time from a sampled input audio signal. A power spectrum calculation part 2 calculates power spectra for the sample sequences. A feature extraction part 3 extracts elements of high importance as feature points from the power spectra. A spectrum variation degree calculation part 4 compares a currently extracted feature point with a last extracted feature point to calculate a feature quantity simulating auditory variation. A discontinuity judgement part 5 judges the discontinuity of the power spectra according to the feature quantities and detects pauses of the sound of the audio signal.