ENCODER, DECODER AND CORRESPONDING METHODS USING ADAPTIVE LOOP FILTER Russian patent published in 2024 - IPC H04N19/117 

FIELD: physics.

SUBSTANCE: invention relates to video encoding and decoding. Result is achieved by the fact that the encoding method implemented by the decoding device comprises a step for obtaining a bit stream, in which at least one bit in the bit stream represents a syntax element for the current block, wherein the syntax element indicates a truncation index of the adaptive loop filter (ALF); parsing the bitstream to obtain a syntax element value for the current block, wherein the syntax element is encoded using a fixed-length code; applying adaptive contour filtering to the current block based on the value of the syntax element for the current block. Here, the fixed-length code means that all possible values of the syntax element are signalled using the same number of bits.

EFFECT: high efficiency of video compression.

21 cl, 24 dwg, 3 tbl