US 12,323,584 B2
Video picture component prediction method and apparatus, and computer storage medium
Junyan Huo, Guangdong (CN); and Shuai Wan, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Nov. 29, 2023, as Appl. No. 18/523,440.
Application 18/523,440 is a continuation of application No. 17/658,787, filed on Apr. 11, 2022, granted, now 11,876,958.
Application 17/658,787 is a continuation of application No. 17/220,007, filed on Apr. 1, 2021, granted, now 11,388,397, issued on Jul. 12, 2022.
Application 17/220,007 is a continuation of application No. PCT/CN2019/110633, filed on Oct. 11, 2019.
Claims priority of provisional application 62/744,747, filed on Oct. 12, 2018.
Prior Publication US 2024/0098255 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/117 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/82 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/117 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/82 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A picture component prediction method, applied to a decoder, the method comprising:
determining a first picture component reference value set of a current block;
determining multiple first picture component reference values according to the first picture component reference value set, wherein the multiple first picture component reference values include four reference values corresponding to four preset sample positions, respectively;
performing first filtering processing on sample values of samples corresponding to the multiple first picture component reference values, respectively, to determine multiple filtered first picture reference sample values;
determining a parameter of a component linear model according to the multiple filtered first picture reference sample values and corresponding to-be-predicted picture component reference values, the to-be-predicted picture component being a picture component which is different from the first picture component, and the component linear model characterizing a linear mapping relationship for mapping a sample value of the first picture component to a sample value of the to-be-predicted picture component;
performing mapping processing on a reconstructed value of the first picture component of the current block according to the component linear model to obtain a mapped value; and
determining a predicted value of the to-be-predicted picture component of the current block according to the mapped value;
wherein determining the multiple first picture component reference values according to the first picture component reference value set comprises:
selecting two reference samples from samples in one or more neighboring lines at a top side of the current block according to preset positions, and selecting two reference samples from samples in one or more neighboring columns at a left side of the current block according to preset positions; and
determining the multiple first picture component reference values according to the four selected samples.