FIELD: physics.
SUBSTANCE: method for estimating a tonality of a sound signal involves calculating a current residual spectrum of the sound signal; detecting peaks in the current residual spectrum; calculating a correlation map between the current residual spectrum and a previous residual spectrum for each detected peak; and calculating a long-term correlation map based on the calculated correlation map. The long-term correlation map characterises tonality of the sound signal.
EFFECT: increasing efficiency of detecting sound activity in the presence of musical signals, improved recognition of unvoiced sounds and music.
66 cl, 7 dwg
