METHOD AND DEVICE FOR EFFECTIVE ENCODING OF RESIDUAL BLOCKS Russian patent published in 2023 - IPC H04N19/119 H04N19/86 H04N19/117 

FIELD: image coding.

SUBSTANCE: device for decoding video images is proposed, where the decoding block is designed to decode from a bitstream of a flag indicating whether residual signals corresponding to only a partial area of the current block have been encoded, and decode from the bitstream information about the transform factors for one sub-block of two sub-blocks extracted from the current block, for restoring transform factors, when the flag indicates that residual signals corresponding to only a partial area of the current block have been encoded; the prediction block is executed to predict the current block to generate the prediction block; an inverse quantization and inverse transform block is configured to inverse quantize and inverse transform factors in one sub-block for which the transform factor information has been decoded to generate a residual block for the current block; the adder is configured to add the prediction block and the residual block to restore the current block; and the filtering unit is configured to set a grid of N samples at equal intervals in the horizontal and vertical directions and perform deblocking filtering on a boundary between two sub-blocks in the current block that is the same as the grid boundary, where N is 4 when the current block is a luminance block, and N is 8 when the current block is a chrominance block.

EFFECT: increasing the efficiency of encoding/decoding of the residual blocks.

14 cl, 11 dwg