US 12,238,274 B2
Method and apparatus of reference sample interpolation filtering for directional intra prediction
Alexey Konstantinovich Filippov, Moscow (RU); Vasily Alexeevich Rufitskiy, Moscow (RU); and Elena Alexandrovna Alshina, Munich (DE)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jun. 15, 2022, as Appl. No. 17/841,324.
Application 17/841,324 is a continuation of application No. PCT/RU2020/050379, filed on Dec. 15, 2020.
Claims priority of application No. PCT/RU2019/000949 (WO), filed on Dec. 16, 2019.
Prior Publication US 2022/0329781 A1, Oct. 13, 2022
Int. Cl. H04N 19/82 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of intra prediction of a coding block performed by a decoder, the method comprising:
obtaining a bitstream for the coding block;
selecting from a set of pre-determined prediction modes an optimum value of intra prediction mode for the coding block according to the bitstream;
obtaining a value of an index for the coding block in accordance with the bitstream, wherein:
when the value of the index for the coding block is equal to a predefined value, obtaining a set of reference samples for the coding block, the set of reference samples comprising samples of a reconstructed block and additional samples; and
when the value of the index for the coding block is not equal to the predefined value, obtaining a set of reference samples for the coding block, the set of reference samples comprising only samples of the reconstructed block; and
obtaining a prediction value of a sample included in the coding block in accordance with the value of intra prediction mode for the coding block and the set of reference samples.