CROSS PRODUCT-ENHANCED HARMONIC TRANSFORMATION Russian patent published in 2013 - IPC G10L21/02 

FIELD: radio engineering, communication.

SUBSTANCE: described is a system and a method of generating a high-frequency signal component from a low-frequency signal component. The system includes an analysing filter unit which forms a set of signals of the analysed subbands of the low-frequency signal component. The system also includes a linear processing unit for generating a signal of the synthesised subband with the synthesised frequency by modifying the phase of the first and second signals of the analysed subbands from the set of signals of the analysed subbands and combining the signals of the analysed subbands with the modified phase. Ultimately, the system includes a synthesis filter unit for generating a high-frequency signal component from a signal of the synthesised subband.

EFFECT: improved efficiency of encoding conventional codecs of perceptible digital audio signals.

29 cl, 30 dwg