HARMONIC TRANSFORMATION IMPROVED BY CROSS-PRODUCT Russian patent published in 2018 - IPC G10L21/02 G10L19/02 

FIELD: physics.

SUBSTANCE: system of generating a high-frequency signal component from the low-frequency component signal includes a block of the analyzing filters, generating a set of signals of the analyzed sub-bands of the low-frequency signal component. It also includes a non-linear processing block used to generate the signal of the synthesized subband with the synthesized frequency by modifying the phase of the first and the second signals of the analyzed subbands from a set of signals of the analyzed subbands, and to combine the signals of the analyzed subbands with the modified phase. Ultimately, it includes a block of the synthesizing filters used to generate the high-frequency signal component from the signal of the synthesized subband.

EFFECT: improving the quality of the decoded audio signal.

19 cl, 30 dwg