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 a prediction unit using three intra prediction modes which are determined by left and above intra prediction modes; determining a size of a current block using transform size information; generating 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 the size of the current block; and generating a reconstructed block of the current block using the prediction block and the residual block, wherein the size of the current block is equal to or smaller than a size of the prediction unit, and the sizes of the prediction block, the residual block and the reconstructed block are equal to a size of a transform unit, and the transform size information includes one or more split_tu_flags, and wherein generating the residual block of the current block comprises:
entropy-decoding the encoded residual signals to generate quantized coefficient information;inversely scanning the quantized coefficient information to generate a quantized block using an inverse scan pattern which is determined according to the intra prediction mode and a size of the current block; andinversely quantizing and transforming the quantized block using quantization parameter and an inverse transform,wherein a type of the inverse transform is determined by the size of the transform unit.