FIELD: information technology.
SUBSTANCE: in one version, a method of processing signals includes encoding a low-frequency portion of a speech signal into at least an encoded narrowband excitation signal and a plurality of narrowband filter parameters; and generating a highband excitation signal based on a narrowband excitation signal. The narrowband excitation signal is based on an encoded narrowband excitation signal. The method also includes encoding a high-frequency portion of a speech signal into at least a plurality of highband filter parameters according to at least a highband excitation signal. The encoded narrowband excitation signal includes a time warping and the method includes applying a time shift to the high-frequency portion based on information related to the time warping.
EFFECT: improved method.
