Patent ID: 9516319
Filing Date: 2016-12-06
CPC Classification: H04N

Claim Text:
1. A method of decoding video data in a merge mode, the method comprising: generating a quantized block by inverse-scanning quantized coefficient components; generating a transformed block by inverse-quantizing the quantized block using a quantization parameter; generating a residual block by inverse-transforming the transformed block; constructing a merge list using available spatial and temporal merge candidates; setting a merge candidate on the merge list specified by a merge index as motion information of a current prediction unit; generating a prediction block of the current prediction unit using the motion information; and generating a reconstructed block using the prediction block and the residual block, wherein the inverse scan pattern is selected among a diagonal scan, a vertical scan and a horizontal scan, and when the size of the quantized block is larger than a predetermined size, a plurality of subsets are generated and the quantized block is generated by inversely scanning the plurality of subsets using the inverse scan pattern, wherein the quantization parameter is derived per a quantization unit, wherein a minimum size of the quantization unit is adjusted per picture, wherein if two or more quantization parameters are available among a left quantization parameter, an above quantization parameter and a previous quantization parameter of a current coding unit, the quantization parameter predictor is generated using two available quantization parameters determined according to a predetermined order, and wherein if only one quantization parameter is available among the left quantization parameter, the above quantization parameter and the previous quantization parameter of the current coding unit, the available quantization parameter is set as the quantization parameter predictor.