METHOD FOR ENCODING CONVERSION FACTOR BASED ON HIGH FREQUENCY ZEROING AND EQUIPMENT FOR THIS Russian patent published in 2023 - IPC H04N19/64 H04N19/124 H04N19/13 

FIELD: image encoding and decoding.

SUBSTANCE: residual samples for the current block are derived based on the prediction samples. The conversion factors for the current block are obtained based on the residual samples for the current block. Residual information associated with the transformation factors is encoded. The current block includes a region of low-frequency conversion factors, including at least one significant conversion factor, and a region other than the region of low-frequency conversion factors, including a zero conversion factor. The residual information includes the last significant factor prefix information and the last significant factor suffix information regarding the position of the last non-zero conversion factor among the conversion factors for the current block, cMax for the last significant factor prefix information is determined based on the size of the low frequency conversion factor region.

EFFECT: increased efficiency of encoding.

4 cl, 13 dwg