FIELD: information technology.
SUBSTANCE: image decoding method involves extracting, from a bit stream, information showing the intra-frame prediction mode applied to the current prediction unit; determining reference pixels among neighbouring pixels adjacent to the current prediction unit, and filtered neighbouring pixels based on the size of the current prediction unit and the intra-frame prediction mode of the current prediction unit; performing intra-frame prediction in prediction mode over the current prediction unit using the extracted information and determined reference pixels. The method involves hierarchical breakdown of a plurality of maximum coding units, according to information on the maximum size of the coding unit, into coding units with coding depths in accordance with depths. The coding unit of the current depth is one of rectangular data units obtained by breaking down a coding unit of a greater depth. The coding unit is broken down into coding units of lesser depth, independent of neighbouring coding units, and the coding unit of the current depth is broken down into at least one prediction unit.
EFFECT: high decoding efficiency.
5 cl, 26 dwg, 3 tbl
