METHODS, DEVICES AND SYSTEMS FOR IMPROVEMENT OF UNIFIED DECODING AND CODING OF SPEECH AND AUDIO Russian patent published in 2022 - IPC G06F17/14 G10L19/02 

FIELD: computer technology.

SUBSTANCE: invention relates to the field of computer technology for processing audio data. DFT transformation is recursively split into smaller FFT transformations based on Cooley-Tuckey algorithm, and a root of the 4^th degree is used, if a number of FFT points is a degree of 4, and a mixed root is used, if this number is not a degree of 4, wherein smaller FFT transformations include the use of turning coefficients, wherein the use of turning coefficients includes access to pre-calculated values for turning coefficients, wherein the implementation of FFT module contains the use of a turning coefficient matrix for 4-point FFT, the turning coefficient matrix includes a set of turning coefficients as its elements, wherein the turning coefficient matrix is divided into the first intermediate matrix and the second intermediate matrix.

EFFECT: reduction in a computational load during decoding of an encoded flow of unified speech and audio coding (MPEG-D USAC).

22 cl, 8 dwg