Apparatus of decoding video data

Abstract

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 chromatransform 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 currentluma block and the currentcurrent block and generates a residual luma residual 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.

Description

technical field [0001] The present invention relates to an apparatus for decoding video data, and more particularly, to an apparatus for generating prediction blocks and residual blocks to restore reconstructed blocks for luma and chrominance components using derived intra prediction modes. Background technique [0002] In H.264 / MPEG-4AVC, a picture is divided into a plurality of macroblocks to encode the image, and inter-frame prediction or intra-frame prediction is used to generate prediction blocks, thereby encoding the corresponding macroblocks. The difference between the original block and the predicted block is transformed to generate a transformed block, and the transformed block is quantized using a quantization parameter and one of a plurality of predetermined quantization matrices. The quantized coefficients of the quantized block are scanned by a predetermined scan type and then entropy encoded. The quantization parameter is adjusted for each macroblock and encod...

AI Technical Summary

Problems solved by technology

[0004] However, as the number of intra prediction modes increases, the amount of coding bits required to transmit the intra prediction mode increases

Also, as the size of the coding unit becomes larger, the difference between the initial block and the predicted block is larger

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