FIELD: radio engineering, communication.
SUBSTANCE: invention relates to bandwidth expansion devices. An excitation signal based on an acoustic signal is generated; with that, the acoustic signal includes a variety of frequency components. A feature vector is distinguished out of the acoustic signal; with that, the feature vector includes at least one feature of a component in a frequency domain and at least one feature of a component in a time domain. At least one parameter of the spectrum shape is determined based on the feature vector; with that, at least one parameter of the spectrum shape corresponds to a sub-range signal containing frequency components that belong to an additional variety of frequency components. A signal of the sub-range is generated by the filtration of an excitation signal by means of a filter bank and weighing of a filtered excitation signal using at least one parameter of the spectrum shape.
EFFECT: technical result consists in the improvement of perception of an expanded acoustic signal.
21 cl, 10 dwg
