FIELD: data processing.
SUBSTANCE: invention relates to the field of video processing. Method for converting a plurality of arrays of residual coefficients from a video bitstream configured for a 4:2:2 format into a plurality of arrays of residual bins contains the steps of: decoding four arrays of residual luminance coefficients for luminance channel, each of these four arrays of residual luminance corresponding to one 4x4 brightness block out of four 4x4 brightness blocks, and these four 4x4 brightness blocks together occupy a 8x8 brightness region; decoding two arrays of residual chromaticity coefficients for the first chrominance channel; decoding two arrays of residual chromaticity coefficients for the second chroma channel; and applying a transform to each of the four decoded arrays of residual luminance coefficients for the luminance channel, decoded two arrays of residual chromaticity coefficients for the first chrominance channel and decoded two arrays of residual chromaticity coefficients for the second chroma channel to create residual discretization luminance elements for the luminance channel, residual chrominance bin of the first chrominance channel and residual chrominance bin of the second chrominance channel.
EFFECT: improved efficiency of encoding/decoding arrays of residual coefficients of the bit stream.
6 cl, 28 dwg, 4 tbl
