US 11,722,669 B2
Methods and apparatus for determining quantization parameter predictors from a plurality of neighboring quantization parameters
Xiaoan Lu, Princeton, NJ (US); Joel Sole, San Diego, CA (US); Peng Yin, Ithaca, NY (US); Qian Xu, Folsom, CA (US); and Yunfei Zheng, San Jose, CA (US)
Assigned to INTERDIGITAL VC HOLDINGS, INC., Wilmington, DE (US)
Filed by INTERDIGITAL VC HOLDINGS, INC., Wilmington, DE (US)
Filed on Jun. 30, 2022, as Appl. No. 17/854,168.
Application 17/854,168 is a continuation of application No. 16/918,069, filed on Jul. 1, 2020, granted, now 11,381,818.
Application 16/918,069 is a continuation of application No. 16/720,609, filed on Dec. 19, 2019, granted, now 10,742,981, issued on Aug. 11, 2020.
Application 16/720,609 is a continuation of application No. 16/408,956, filed on May 10, 2019, granted, now 10,547,840, issued on Jan. 28, 2020.
Application 16/408,956 is a continuation of application No. 15/654,823, filed on Jul. 20, 2017, granted, now 10,334,247, issued on Jun. 25, 2019.
Application 15/654,823 is a continuation of application No. 14/971,394, filed on Dec. 16, 2015, granted, now 9,749,631, issued on Aug. 29, 2017.
Application 14/971,394 is a continuation of application No. 13/702,519, granted, now 9,235,774, issued on Jan. 12, 2016, previously published as PCT/US2011/039579, filed on Jun. 8, 2011.
Claims priority of provisional application 61/353,365, filed on Jun. 10, 2010.
Prior Publication US 2022/0337838 A1, Oct. 20, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/126 (2014.01); H04N 19/196 (2014.01); H04N 19/61 (2014.01); H04N 19/176 (2014.01); H04N 19/157 (2014.01); H04N 19/51 (2014.01); H04N 19/593 (2014.01); H04N 19/124 (2014.01); H04N 19/174 (2014.01); H04N 19/513 (2014.01); H04N 19/52 (2014.01); H04N 19/139 (2014.01)
CPC H04N 19/126 (2014.11) [H04N 19/124 (2014.11); H04N 19/157 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11); H04N 19/196 (2014.11); H04N 19/197 (2014.11); H04N 19/198 (2014.11); H04N 19/51 (2014.11); H04N 19/513 (2014.11); H04N 19/593 (2014.11); H04N 19/61 (2014.11); H04N 19/139 (2014.11); H04N 19/52 (2014.11)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a decoder for decoding image data for at least a portion of a picture using a quantization parameter predictor for a current quantization parameter to be applied to the image data, the quantization parameter predictor being determined using multiple quantization parameters from previously decoded neighboring portions,
wherein a value indicative of a difference between the current quantization parameter and the quantization parameter predictor is decoded for use in decoding the image data, and
wherein said quantization parameter predictor is determined by finding the mean of the quantization parameters of the previously d e coded neighboring portion to the left and the previously decoded neighboring portion above the portion currently being decoded when these neighboring portions are available, and
if at least one of said neighboring portions is not available, basing the quantization parameter predictor on a quantization parameter of another portion or on a quantization parameter for a current slice.