HARMONIC TRANSFORMATION IMPROVED BY CROSS-PRODUCT Russian patent published in 2017 - IPC G10L21/02 

FIELD: physics.

SUBSTANCE: system for generating a high-frequency signal component from the low-frequency signal component includes an analysis filter unit that generates 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 the second signals of the analyzed subbands from the set of signals of the analyzed subbands and combining the signals of the analyzed subbands with the modified phase. It also includes a synthesizing filter unit for generating a high-frequency signal component from the synthesized subband signal.

EFFECT: improving the quality of the encoded audio signal.

22 cl, 30 dwg