FIELD: physics, acoustics.
SUBSTANCE: invention relates to encoding acoustic signals and can be used for transportation in the frequency domain. The high frequency audio signal generator consists of an analyser for analysing an input signal to determine current transient information, a spectral converter for converting the input signal into an input spectral representation, a spectral processor for processing the input spectral representation to obtain a modified spectral representation comprising frequency values higher than the input spectral representation, a time converter for converting the modified spectral representation to a time domain representation, wherein the spectral converter or the time converter is capable of performing frequency domain oversampling for the first component of the input signal having transient information and not performing the frequency domain oversampling for the second component of the input signal without transient features.
EFFECT: efficient generation of a quality high frequency audio signal through separate processing of transient and fixed components of the audio signal.
15 cl, 7 dwg
