ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD AND PROGRAM Russian patent published in 2016 - IPC G10L21/04 G10L19/02 

FIELD: physics.

SUBSTANCE: invention relates to encoding and decoding audio signals. Bandpass filter divides input signal into a plurality of subband signals, circuit computing of characteristic quantity calculates a characteristic value using at least one of plurality of obtained by dividing subband signals and input signal evaluation circuit subband power treble calculates estimation value subband power of high frequency based on calculated characteristic amount and a high frequency signal generating circuit generates a high frequency component signal based on the set of subband signals extracted by a bandpass filter, and values of subband power estimates treble computed evaluation circuit power high frequency subband. Bandwidth extension device extends frequency range of the input signal using a high-frequency component signal generated by RF signal generating circuit. This invention can be applied, for example, in a bandwidth extending device, coding device, decoding device and so on.

EFFECT: technical result is to increase sound quality of encoded audio signal.

16 cl, 34 dwg