SOUND CODING DEVICE AND DECODING DEVICE Russian patent published in 2018 - IPC G10L19/08 

FIELD: physics.

SUBSTANCE: method of decoding a coded bit of the audio stream in the processing system of audio signals is disclosed, wherein the method comprises: extracting the first shape encoding signal from the encoded bit audio stream, containing the spectral coefficients corresponding to the frequencies to the first channel separation frequency; performing parametric decoding on the second channel separation frequency to generate the reconstructed signal. The second channel separation frequency is higher than the first channel separation frequency and the parametric decoding uses reconstruction parameters derived from the encoded bitstream to generate the reconstructed signal; extracting the second shape encoding signal from the encoded bit audio stream, comprising spectral coefficients corresponding to a subset of frequencies above the first channel separation frequency; alternating the second shape encoding signal with the reconstructed signal to generate an interlaced signal and combining the interlaced signal with the first shape encoding signal.

EFFECT: decoding the encoded bit audio stream in the audio signal processing system.

16 cl, 8 dwg