APPARATUS FOR DECODING VIDEO DATA Russian patent published in 2016 - IPC H04N19/117 H04N19/186 H04N19/50 

FIELD: information technology.

SUBSTANCE: invention relates to decoding video data, and more particularly, to an apparatus of deriving intra prediction mode, generating a prediction block and a residual block to recover a reconstructed block for luma and chroma components. Provided is an apparatus that derives a luma intra prediction mode and a chroma intra prediction mode, determines a size of a luma transform unit and a size of a chroma transform unit using luma transform size information adaptively filters the reference pixels of a current luma block based on the luma intra prediction mode and the size of the luma transform unit generates prediction blocks of the current luma block and the current chroma block and generates a residual luma block and a chroma residual block. Therefore, the distance of intra prediction becomes short, and the amount of coding bits, required to encode intra prediciton modes and residual blocks of luma and chroma components is reduced, and the coding complexity is reduced by adaptively encoding the intra prediction modes and adaptively filtering the reference pixels.

EFFECT: improved encoding and decoding video data for chroma and luma components.

6 cl, 6 dwg