US 12,088,807 B2
United states method and apparatus for encoding video, and decoding method and apparatus
Sung Chang Lim, Daejeon (KR); Hui Yong Kim, Daejeon (KR); Se Yoon Jeong, Daejeon (KR); Suk Hee Cho, Daejeon (KR); Jong Ho Kim, Daejeon (KR); Ha Hyun Lee, Seoul (KR); Jin Ho Lee, Daejeon (KR); Jin Soo Choi, Daejeon (KR); Jin Woong Kim, Daejeon (KR); and Chie Teuk Ahn, Daejeon (KR)
Assigned to IDEAHUB INC., Seoul (KR)
Filed by IDEAHUB INC., Seoul (KR)
Filed on Mar. 6, 2023, as Appl. No. 18/118,004.
Application 18/118,004 is a continuation of application No. 17/580,810, filed on Jan. 21, 2022, granted, now 11,601,649.
Application 17/580,810 is a continuation of application No. 17/027,866, filed on Sep. 22, 2020, granted, now 11,265,546, issued on Mar. 1, 2022.
Application 17/027,866 is a continuation of application No. 16/236,019, filed on Dec. 28, 2018, granted, now 10,827,174, issued on Nov. 3, 2020.
Application 16/236,019 is a continuation of application No. 15/801,423, filed on Nov. 2, 2017, granted, now 10,212,422, issued on Feb. 19, 2019.
Application 15/801,423 is a continuation of application No. 15/489,290, filed on Apr. 17, 2017, granted, now 9,838,691, issued on Dec. 5, 2017.
Application 15/489,290 is a continuation of application No. 13/808,433, granted, now 9,699,449, issued on Jul. 4, 2017, previously published as PCT/KR2011/006052, filed on Aug. 17, 2011.
Claims priority of application No. 10-2010-0079104 (KR), filed on Aug. 17, 2010; application No. 10-2010-0124181 (KR), filed on Dec. 7, 2010; application No. 10-2011-0025572 (KR), filed on Mar. 22, 2011; and application No. 10-2011-0050852 (KR), filed on May 27, 2011.
Prior Publication US 2023/0209056 A1, Jun. 29, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/119 (2014.01); H04N 19/124 (2014.01); H04N 19/14 (2014.01); H04N 19/176 (2014.01); H04N 19/196 (2014.01); H04N 19/33 (2014.01); H04N 19/463 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/119 (2014.11); H04N 19/14 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11); H04N 19/33 (2014.11); H04N 19/463 (2014.11); H04N 19/70 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A method for decoding an image, the method comprising:
receiving a bitstream including image information;
decoding base block size information on a size of a base block, and a residual quantization parameter of a decoding object unit, from the bitstream;
deriving a predicted quantization parameter of the decoding object unit based on the base block size information;
deriving a quantization parameter of the decoding object unit based on the predicted quantization parameter and the residual quantization parameter; and
decoding the decoding object unit based on the quantization parameter of the decoding object unit,
wherein the decoding the decoding object unit comprises
performing inverse quantization for the decoding object unit based on the quantization parameter; and
performing inverse transform for the quantized decoding object unit,
wherein the residual quantization parameter is decoded in units of a TU,
wherein the base block size information is decoded in units of a Picture,
wherein, when a size of the decoding object unit is smaller than a size of the base block specified by the base block size information, the quantization parameter of the decoding object unit is same as quantization parameters of all the other decoding units included in the base block together with the decoding object unit, and
wherein the residual quantization parameter is selectively decoded based on flag information obtained from the bitstream, the flag information indicating whether the residual quantization parameter is decoded or not.