US 12,382,045 B2
Method for determining color difference component quantization parameter and device using the method
Sung Chang Lim, Daejeon (KR); Hui Yong Kim, Daejeon (KR); Se Yoon Jeong, Daejeon (KR); Jong Ho Kim, Daejeon (KR); Ha Hyun Lee, Seoul (KR); Jin Ho Lee, Daejeon (KR); Jin Soo Choi, Daejeo (KR); and Jin Woong Kim, Daejeon (KR)
Assigned to Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed by Dolby Laboratories Licensing Corporation, San Francisco, CA (US)
Filed on Apr. 5, 2024, as Appl. No. 18/628,509.
Application 18/628,509 is a continuation of application No. 17/878,305, filed on Aug. 1, 2022, granted, now 11,979,573.
Application 17/878,305 is a continuation of application No. 17/321,728, filed on May 17, 2021, granted, now 11,438,593, issued on Sep. 6, 2022.
Application 17/321,728 is a continuation of application No. 16/794,054, filed on Feb. 18, 2020, granted, now 11,051,019, issued on Jun. 29, 2021.
Application 16/794,054 is a continuation of application No. 16/019,131, filed on Jun. 26, 2018, granted, now 10,609,371, issued on Mar. 31, 2020.
Application 16/019,131 is a continuation of application No. 15/656,282, filed on Jul. 21, 2017, granted, now 10,045,026, issued on Aug. 7, 2018.
Application 15/656,282 is a continuation of application No. 15/338,484, filed on Oct. 31, 2016, granted, now 9,749,632, issued on Aug. 29, 2017.
Application 15/338,484 is a continuation of application No. 15/137,189, filed on Apr. 25, 2016, granted, now 9,516,323, issued on Dec. 6, 2016.
Application 15/137,189 is a continuation of application No. 14/001,024, granted, now 9,363,509, issued on Jun. 7, 2016, previously published as PCT/KR2012/001620, filed on Mar. 5, 2012.
Claims priority of application No. 10-2011-0019152 (KR), filed on Mar. 3, 2011; and application No. 10-2012-0022531 (KR), filed on Mar. 5, 2012.
Prior Publication US 2024/0251081 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/124 (2014.01); H04N 19/105 (2014.01); H04N 19/117 (2014.01); H04N 19/122 (2014.01); H04N 19/13 (2014.01); H04N 19/15 (2014.01); H04N 19/157 (2014.01); H04N 19/159 (2014.01); H04N 19/186 (2014.01); H04N 19/43 (2014.01); H04N 19/46 (2014.01); H04N 19/463 (2014.01); H04N 19/61 (2014.01); H04N 19/174 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/124 (2014.11) [H04N 19/105 (2014.11); H04N 19/117 (2014.11); H04N 19/122 (2014.11); H04N 19/13 (2014.11); H04N 19/15 (2014.11); H04N 19/157 (2014.11); H04N 19/159 (2014.11); H04N 19/186 (2014.11); H04N 19/43 (2014.11); H04N 19/46 (2014.11); H04N 19/463 (2014.11); H04N 19/61 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A video decoding apparatus comprising:
an inverse-quantizer configured to identify a quantization group, the quantization group being a group of a plurality of transform blocks to which a same chrominance component quantization parameter is applied, configured to calculate the chrominance component quantization parameter to be applied to the quantization group, configured to inverse-quantize transform coefficients of a transform block included in the quantization group by using the calculated chrominance component quantization parameter;
an inverse-transformer configured to generate a residual block of a current block by inverse-transforming the inverse-quantized transform coefficients;
a predictor configured to generate a prediction block of the current block by predicting the current block; and
an adder configured to reconstruct the current block based on the residual block and the prediction block,
wherein the quantization group comprises transform blocks of a first size and transform blocks of a second size,
wherein the inverse-quantizer comprises:
a chrominance component quantization parameter index calculator configured to calculate a chrominance component quantization parameter index by using a chrominance component quantization parameter offset, wherein the chrominance component quantization parameter offset is derived from encoding information of a level of a sequence; and
a chrominance component quantization parameter calculator configured to calculate the chrominance component quantization parameter based on the chrominance component quantization parameter index.