FIELD: information technology.
SUBSTANCE: apparatus for converting an audio signal into a parametric representation, comprising: a signal analyser (102) for decomposing a segment of the audio signal to obtain an analysis results; a band pass estimator (106) for estimating data on a plurality of band pass filters based on the analysis results; a modulation estimator (110) for estimating amplitude modulation (112) or frequency modulation (114) or phase modulation for each band of the plurality of band pass filters for the segment of the audio signal using the data on the plurality of band pass filters; an output interface (116) for transmitting, storing or modifying information on the amplitude modulation, frequency modulation or phase modulation or information on the plurality of band pass filters for the segment of the audio signal.
EFFECT: improved concept of parametrisation of an audio signal owing to efficiency of using low resolution power of human hearing.
23 cl, 25 dwg
