FIELD: physics.
SUBSTANCE: invention relates to means for harmoniously expanding a band of audio signals. Separate, in the device, the input audio signal to at least a lower band signal and an upper band signal. Lower band signal corresponds to the lower band band, and the upper band signal corresponds to the upper band band. Select a non-linear processing function from the set of non-linear processing functions. First spread signal is generated based on the lower band signal and the non-linear processing function. At least one adjustment parameter is generated based on the first spread signal, the upper band signal, or both.
EFFECT: technical result consists in improving the quality of the synthesized part of the upper band of the output signal.
50 cl, 6 dwg
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