WINDOW ANALYSIS / SYNTHESIS FUNCTION FOR MODULATED TRANSFORM WITH OVERLAPPING Russian patent published in 2021 - IPC G10L19/22 

FIELD: computer equipment.

SUBSTANCE: invention relates to computer engineering for processing audio data. Technical result is achieved by performing synthesis based on modified discrete cosine transform (MDCT) for conversion of FD-presentation of information signal or its processed version into representation in time domain (TD-representation) using synthesis window function (90), having meander section (94), which transitions linear function in corresponding at least four points (No. 1, No. 2, No. 3, No. 4), wherein synthesis window function (90, 290) is defined such that in meandering section: exceed linear function in first interval between first intersection point and second intersection point; be lower than linear function in second interval between second intersection point and third intersection point; exceed the linear function in the third interval between the third intersection point and the fourth intersection point.

EFFECT: technical result consists in excluding suboptimal frequency characteristic by eliminating rupture differentiation of information signal.

43 cl, 33 dwg