DEVICE AND METHOD FOR BANDWIDTH EXTENSION FOR ACOUSTIC SIGNALS Russian patent published in 2018 - IPC G10L21/388 G10L19/02 

FIELD: acoustics.

SUBSTANCE: invention relates to means for bandwidth extension for acoustic signals. Present invention is installed in a device that extends bandwidth for acoustic signal encoding and decoding. This novel bandwidth extension encoding identifies a low-frequency spectrum component having the highest correlation to a high-frequency bandwidth signal among input signals, duplicates a high-frequency spectrum by energy adjustment of said component, and maintains the harmonic relationship between the low-frequency spectrum and the duplicated high-frequency spectrum by adjusting the spectral peak position of the duplicated high-frequency spectrum, on the basis of a harmonic frequency estimated from a composite low-frequency spectrum.

EFFECT: technical result is more efficient bandwidth extension of input signals for better audio quality.

7 cl, 14 dwg