Apparatus of decoding video data

摘要

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 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 prediction 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.

主权项

1. An apparatus of decoding video data, comprising:
a prediction mode decoding unit configured to derive a luma intra prediction mode and a chroma intra prediction mode; a prediction size determining unit configured to determine a size of a luma transform unit and a size of a chroma transform unit; a reference pixel generating unit configured to generate referential pixels if at least one reference pixel is unavailable; a reference pixel filtering unit configured to adaptively filter the reference pixels of a current luma block based on the luma intra prediction mode and the size of the luma transform unit, and not to filter the reference pixels of a current chroma block; a prediction block generating unit configured to generate prediction blocks of the current luma block and the current chroma block; and a residual bock generating unit configured to generate a luma residual block and a chroma residual block, wherein the luma intra prediction mode is derived using an MPM (Most probably mode) group including three intra prediction modes, a mode group indicator and a luma prediction mode index.