FIELD: data processing.
SUBSTANCE: invention relates to video encoding/decoding. Disclosed is a method of decoding video data. Method includes a step of analysing a syntax element from a bit stream, wherein bit stream includes a network abstraction level (NAL) node of a coded slice for a video image slice, which is divided into coding tree blocks (CTB). Each CTB is associated with different equidimensional blocks of pixels in image. Network abstraction level (NAL) node of a coded slice includes a plurality of sub-streams, wherein syntax element having a specific value which indicating each corresponding row of CTB of image, forms corresponding image tile fragment. Method includes determining whether sub-streams include padding bits. In response to determination that syntax element has a specific value, decoding each image tile fragment using parallel wave processing.
EFFECT: high efficiency of encoding/decoding video data due to selective parallel wave processing.
40 cl, 12 dwg, 4 tbl
