US 12,470,719 B2
Method for determining prediction direction, decoder, and computer storage medium
Junyan Huo, Guangdong (CN); Yanzhuo Ma, Guangdong (CN); Jianglin Wang, Guangdong (CN); Shuai Wan, Guangdong (CN); and Fuzheng Yang, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Jul. 3, 2024, as Appl. No. 18/762,640.
Application 18/762,640 is a continuation of application No. 18/131,065, filed on Apr. 5, 2023, granted, now 12,069,276.
Application 18/131,065 is a continuation of application No. 17/714,881, filed on Apr. 6, 2022, granted, now 11,659,187, issued on May 23, 2023.
Application 17/714,881 is a continuation of application No. 17/366,787, filed on Jul. 2, 2021, granted, now 11,343,508, issued on May 24, 2022.
Application 17/366,787 is a continuation of application No. PCT/CN2019/070145, filed on Jan. 2, 2019.
Prior Publication US 2024/0357124 A1, Oct. 24, 2024
Int. Cl. H04N 19/137 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/137 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11)] 4 Claims
OG exemplary drawing
 
3. A decoder, comprising:
a processor; and
a storage medium storing instructions executable by the processor,
wherein the storage medium is configured to communicate with the processor through a communication bus to execute an operation, and the instructions are executed by the processor to implement a method for determining a prediction direction, the method comprising:
determining a chroma intra prediction mode of a block to be decoded;
acquiring a Direct Mode (DM) in the chroma intra prediction mode; and
determining an index number of the prediction direction in a DM derived mode based on M, N, K1 and K2 to determine the DM derived mode;
wherein the N is an offset, the M is an index value of prediction direction of the DM, the K1 is a minimum value of index values of prediction directions in the DM and the K2 is a maximum value of the index values of the prediction directions in the DM, and
wherein decoding of a Cross-Component Linear Model Prediction (CCLM) is decoded prior to decoding of the DM derived mode.