FIELD: data processing.
SUBSTANCE: present invention relates to audio coding systems that use a harmonic transformation method for high-frequency reconstruction. System for generating a high-frequency signal component from a low-frequency signal component includes an analyzing filter unit which forms a set of signals of the analyzed subbands of the low-frequency signal component. It also includes a non-linear processing unit for generating a synthesized subband signal with a synthesized frequency by modifying the phase of the first and second signal of the analyzed subbands from the set of signals of the analyzed subbands and the combination of the signals of the analyzed subbands with a modified phase. Ultimately, the system includes a synthesis filter unit for generating a high-frequency signal component from a signal of the synthesized subband.
EFFECT: technical result is to improve the quality of a decoded audio signal.
12 cl, 30 dwg
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