METHOD OF ENCODING COEFFICIENTS, ENCODER AND DECODER Russian patent published in 2025 - IPC H04N19/46 H04N19/91 H04N19/13 H04N19/176 

FIELD: video encoding means.

SUBSTANCE: sequence level flag and a position of the last significant coefficient are determined. Flag of the reverse position of the last significant coefficient is determined when the flag of the sequence level indicates that the video satisfies a predetermined condition. Information on coordinates of the last significant coefficient is determined according to the position of the last significant coefficient and the flag of the inverse position of the last significant coefficient. Information on the prefix of the horizontal coordinate of the last significant coefficient, information on the prefix of the vertical coordinate of the last significant coefficient are determined, information on the suffix of the horizontal coordinate of the last significant coefficient and information on the suffix of the vertical coordinate of the last significant coefficient according to information on coordinates of the last significant coefficient. All coefficients before the position of the last significant coefficient are encoded according to the predetermined scanning order and the bit information obtained by encoding is provided.

EFFECT: high efficiency of video encoding.

17 cl, 10 tbl, 17 dwg