METHOD OF GENERATING RECONSTRUCTED BLOCK

摘要

Provided is a method that derives an intra prediction mode of a prediction unit, determines a size of a current block using transform size information, generates a prediction block of the current block according to the intra prediction mode, generating a residual block of the current block according to the intra prediction mode and generating a reconstructed block of the current block using the prediction block and the residual block. The sizes of the prediction block and the residual block are set equal to a size of a transform unit. Therefore, the distance of intra prediction becomes short, and the amount of coding bits of residual block is reduced by generating a prediction block very similar to original block. Also, the signaling bits required to signal intra prediction mode decrease by generating MPM group adaptively according to the neighboring intra prediction modes.

主权项

1. A method of generating a reconstructed block comprising:
deriving an intra prediction mode of using a Most Probable Mode (MPM) group including three intra prediction modes which are determined based on left and above intra prediction modes of a current prediction unit generating a prediction block according to the intra prediction mode; generating a residual block by inversely scanning significant flags, coefficient signs and coefficient levels according to an inverse scan pattern to generate a quantized block, by inversely quantizing the quantized block using a quantization parameter to generate a transformed block and by inversely transforming the transformed block using an inverse transform matrix determined based on a size of transform unit; and generating a reconstructed block using the prediction block and the residual block, wherein a size of the prediction block is determined by transform size information, wherein when the left intra prediction mode is equal to the above intra prediction mode, the MPM group includes two non-directional intra prediction modes and a vertical mode if the left intra prediction mode is one of the two non-directional intra prediction modes and the MPM group includes the left intra prediction mode and the two directional intra prediction modes if the left intra prediction mode is one of directional intra prediction modes.