FIELD: video encoding.
SUBSTANCE: invention relates to means for video encoding. Restored brightness samples are obtained. Maximum and minimum values of brightness samples are determined based on restored brightness samples. The difference between maximum and minimum values of brightness samples is obtained. A position of the most significant bit of the difference between maximum and minimum values of brightness samples is determined. A value is extracted from a lookup table (LUT), using a set of bits as an index, wherein the set of bits follows the position of the most significant bit of the difference of maximum and minimum values of brightness samples. Parameters α and β of a linear model are obtained based on the extracted value. A predicted value of the brightness sample is calculated using obtained parameters α and β of the linear model.
EFFECT: increase in the efficiency of video encoding.
24 cl, 15 dwg, 4 tbl
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