FIELD: physics.
SUBSTANCE: present document describes a method of encoding an audio signal. Method includes: generating a plurality of subband audio signals based on the audio signal; determining the envelope of the spectrum of the audio signal; determining, for the audio signal of each subband, autocorrelation information for the subband audio signal based on the autocorrelation function of the subband audio signal; and generating an encoded representation of the audio signal, wherein the encoded representation comprises a representation of the envelope of the spectrum of the audio signal and a representation of autocorrelation information for the plurality of subband audio signals.
EFFECT: high efficiency of encoding while reducing the amount of data for encoding audio content.
32 cl, 8 dwg
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