US 9,813,712 B2
Apparatus of decoding video data
Soo Mi Oh, Seongnam-si (KR); and Moonock Yang, Singapore (SG)
Assigned to INFOBRIDGE PTE. LTD., Singapore (SG)
Filed by INFOBRIDGE PTE. LTD., Singapore (SG)
Filed on May 16, 2016, as Appl. No. 15/156,017.
Application 15/156,017 is a continuation of application No. 14/349,992, granted, now 9,374,582, previously published as PCT/CN2012/083997, filed on Nov. 2, 2012.
Claims priority of application No. 10-2011-0114610 (KR), filed on Nov. 4, 2011.
Prior Publication US 2016/0261867 A1, Sep. 8, 2016
Int. Cl. H04N 7/12 (2006.01); G06K 9/46 (2006.01); H04N 19/124 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/122 (2014.01); H04N 19/129 (2014.01); H04N 19/593 (2014.01); H04N 19/11 (2014.01); H04N 19/117 (2014.01); H04N 19/463 (2014.01); H04N 19/186 (2014.01); H04N 19/157 (2014.01); H04N 19/82 (2014.01); H04N 19/13 (2014.01); H04N 19/172 (2014.01); H04N 19/119 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/11 (2014.11); H04N 19/117 (2014.11); H04N 19/122 (2014.11); H04N 19/129 (2014.11); H04N 19/13 (2014.11); H04N 19/157 (2014.11); H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/463 (2014.11); H04N 19/593 (2014.11); H04N 19/82 (2014.11); H04N 19/119 (2014.11)] 6 Claims
OG exemplary drawing
 
1. An apparatus for generating a residual block, comprising:
an entropy decoding unit configured to decode residual signals to generate quantized coefficient components;
an inverse scanning unit configured to determine an inverse scan pattern and generate a quantized block using the inverse scan pattern;
an inverse quantization unit configured to derive a quantization parameter and inversely quantize the quantized block using the quantization parameter to generate a transformed block; and
an inverse transform unit configured to inversely transform the transformed block to generate a residual block,
wherein when the quantization parameter is a chroma quantization parameter, the chroma quantization parameter is generated using a luma quantization parameter and an offset parameter indicating a relationship between the luma quantization parameter and the chroma quantization parameter,
the luma quantization parameter is derived using a differential quantization parameter and a quantization parameter predictor, the differential quantization parameter is generated by entropy decoding,
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 a predetermined order, and
if only one quantization parameter is available, the available quantization parameter is set as the quantization parameter predictor.