FIELD: physics, computer engineering.
SUBSTANCE: invention relates to computer engineering. The hardware unit for expanding a compressed audio signal, having one or more compressed audio channels, into an expanded audio signal, having a plurality of expanded audio channels, wherein the hardware unit includes an expansion unit tuned to use current values of variable expansion parameters for expanding the compressed audio signal and obtaining the expanded audio signal; as well as a parameter interpolation module adapted to obtain one or more current interpolated expansion parameters to be used in the expansion unit based on information describing a first complex-valued expansion parameter and a subsequent second complex-valued expansion parameter, wherein the parameter interpolation module is adapted for independent interpolation between the magnitude of the first complex-valued expansion parameter and the magnitude of the second complex-valued expansion parameter, and between the phase of the first complex-valued expansion parameter and the phase (256) of the second complex-valued expansion parameter, to obtain one or more current interpolated complex-valued expansion parameters.
EFFECT: improved quality of an expanded output audio signal.
15 cl, 8 dwg
