US 11,785,208 B2
Prediction method for decoding and apparatus, and computer storage medium
Junyan Huo, Guangdong (CN); Yanzhuo Ma, Guangdong (CN); Shuai Wan, Guangdong (CN); Fuzheng Yang, Guangdong (CN); and Xinwei Li, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Feb. 22, 2022, as Appl. No. 17/677,810.
Application 17/677,810 is a continuation of application No. 17/234,639, filed on Apr. 19, 2021, granted, now 11,297,313.
Application 17/234,639 is a continuation of application No. PCT/CN2018/123657, filed on Dec. 25, 2018.
Prior Publication US 2022/0182610 A1, Jun. 9, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A prediction method for decoding, comprising:
acquiring reference samples adjacent to at least one side of a coding block;
determining a reference point from the at least one side and determining reference sample positions corresponding to the at least one side according to a preset number of samples;
deriving reference samples corresponding to the reference sample positions from the reference samples; and
performing prediction on the coding block based on the derived reference samples, wherein the performing prediction comprises:
determining model parameters of a prediction model based on the derived reference samples, wherein the prediction model is configured to represent a prediction relationship between a first colour component and a second colour component corresponding to a sample in the coding block, comprising: determining, from the derived reference samples, a maximum Lmax and minimum Lmin of first colour component neighbouring reference values and second colour component neighbouring reference values Cmax and Cmin corresponding to reference samples at positions corresponding to Lmax and Lmin; and calculating model parameters according to Lmax, Lmin, Cmax and Cmin by using the formula (3):

OG Complex Work Unit Math
where α and β represent model parameters; and
performing prediction on the coding block based on the prediction model.