US 11,936,909 B2
Prediction method, encoder, decoder, and computer storage medium
Wei Zhang, Guangdong (CN); Fuzheng Yang, Guangdong (CN); Shuai Wan, Guangdong (CN); Junyan Huo, Guangdong (CN); Yanzhuo Ma, Guangdong (CN); Lihui Yang, Guangdong (CN); Na Dai, Guangdong (CN); and Sujun Zhang, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Mar. 17, 2022, as Appl. No. 17/655,353.
Application 17/655,353 is a continuation of application No. PCT/CN2019/109695, filed on Sep. 30, 2019.
Prior Publication US 2022/0210471 A1, Jun. 30, 2022
Int. Cl. H04N 19/597 (2014.01); H04N 19/119 (2014.01); H04N 19/124 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/119 (2014.11); H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A prediction method, which is applied to an encoder and comprises:
determining a spatial block in which an encoding point is located;
constructing a prediction model according to the spatial block, wherein the prediction model is used for characterizing a predicted relationship between a first colour component and a second colour component of the encoding point;
acquiring a value of the first colour component and a value of the second colour component of the encoding point;
obtaining a prediction value of the second colour component of the encoding point by using the prediction model and the value of the first colour component;
calculating a difference between the value of the second colour component and the prediction value of the second colour component, and using the obtained difference as a residual of the encoding point; and
performing Level of Detail (LOD) partitioning and lifting transform based on the residual of the encoding point.