Method of decoding video data

摘要

The invention provides a method of decoding video data in merge mode, comprising: constructing a merge candidate list using available spatial and temporal merge candidates; deriving motion information using a merge index; generating a prediction block using the motion information; generating a residual block by inverse-quantizing the quantized block using a quantization parameter and by inverse-transforming the inverse quantized block; and generating a reconstructed block using the residual block and the prediction block, wherein the quantization parameter is generated per quantization unit and a minimum size of the quantization unit is adjusted per picture. Therefore, the coding efficiency of motion information by selecting predictor of motion information one among neighboring blocks and a temporal block. Also, the coding efficiency of residual block is improved by adaptively adjusting a quantization parameter per quantization unit and generating a quantization parameter predictor using multiple neighboring quantization parameters.

主权项

1. A method of decoding video data in a merge mode, the method comprising:
constructing a merge candidate list using available spatial and temporal merge candidates; deriving motion information using a merge index and the merge candidate list; generating a prediction block using the motion information; generating a residual block by inverse-quantizing a quantized block using a quantization parameter and a quantization matrix and by inverse-transforming the inverse quantized block; and generating a reconstructed block using the residual block and the prediction block, wherein the quantization parameter is generated per a quantization unit and a minimum size of the quantization unit is specified per a picture, wherein a minimum size of the coding unit is determined per a sequence and the quantization unit of minimum size is capable of including more than one coding unit, wherein, when multiple coding units belong to the quantization unit of minimum size and a current coding unit is the first coding unit of the multiple coding units in decoding order, the quantization parameter predictor derived for the current coding unit is used for the other coding units of the multiple coding units, wherein the quantization parameter is generated using a quantization parameter predictor and a differential quantization parameter, wherein the quantization parameter predictor is generated by averaging a left quantization parameter which is a quantization parameter of a left coding unit of the current coding unit and an above quantization parameter which is a quantization parameter of an above coding unit of the current coding unit if the left quantization parameter and the above quantization parameter are available, wherein the quantization parameter predictor is generated by averaging the left quantization parameter and a previous quantization parameter which is a quantization parameter of a previous coding unit of the current coding unit in the decoding order if the quantization parameter is not available, wherein the quantization parameter predictor is generated by averaging the above quantization parameter and the previous quantization parameter if the left quantization parameter is not available, and wherein the quantization parameter predictor is set as the previous quantization parameter if the above quantization parameter and the left quantization parameter are not available.