METHOD AND APPARATUS FOR ENCODING AND DECODING AUDIO SIGNALS (VERSIONS) Russian patent published in 2014 - IPC H03M13/00 

Abstract RU 2505921 C2

FIELD: information technology.

SUBSTANCE: input signal is converted to spectral coefficients; the spectral coefficients are grouped into frequency bands and standards are estimated for each band as the average energy in the band; the spectrum is normalised based on the estimated standards; the standards are weighted based on psycho-acoustic properties of sound; bit distribution is calculated based on the weighted standards; the spectrum is quantised and encoded by the obtained number of bits; the method is characterised by that bit distribution is calculated based on a psycho-acoustic model built on quantised standards. Also disclosed is a device for implementing this method.

EFFECT: low level of distortions and easier encoding.

26 cl, 15 dwg

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RU 2 505 921 C2

Authors

Kim Mi Jang

Porov Anton Viktorovich

Osipov Konstantin Sergeevich

Dates

2014-01-27Published

2012-02-02Filed