ENCODING AND DECODING METHOD, ENCODER AND DECODER Russian patent published in 2025 - IPC H04N19/167 H04N19/129 H04N19/136 H04N19/174 H04N19/186 

FIELD: video encoding means.

SUBSTANCE: identification information on the change in location of the last significant coefficient of the current slice and information on the coordinates of the last significant coefficient of the current block of the blocks in the current slice are determined. In response to identification information indicating that change of location by inverse of the last significant coefficient is applied to blocks of the current slice, the location of the last significant coefficient of the current block is obtained by performing a calculation with respect to information on coordinates of the last significant coefficient. Coefficients of the current block are determined by decoding the coefficients located before the location of the last significant coefficient in a given scanning order. In response to the fact that the value of the first identification information on the change of location by the inverse of the last significant coefficient is the first value, determining that reversal of the last significant coefficient is applied to each of the luminance component, the first chrominance component and the second chrominance component of the current slice.

EFFECT: high efficiency of video encoding.

13 cl, 17 dwg