US 11,902,537 B2
Usage of templates for decoder-side intra mode derivation
Yang Wang, Beijing (CN); Kai Zhang, Los Angeles, CA (US); Li Zhang, Los Angeles, CA (US); Yuwen He, Los Angeles, CA (US); and Hongbin Liu, Beijing (CN)
Assigned to LEMON INC., Grand Cayman (KY)
Filed by Lemon Inc., Grand Cayman (KY)
Filed on Jun. 10, 2022, as Appl. No. 17/837,867.
Application 17/837,867 is a continuation of application No. 17/148,383, filed on Jan. 13, 2021, granted, now 11,388,421.
Prior Publication US 2022/0329826 A1, Oct. 13, 2022
Int. Cl. H04N 19/159 (2014.01); H04N 19/70 (2014.01); H04N 19/176 (2014.01); H04N 19/147 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/147 (2014.11); H04N 19/176 (2014.11); H04N 19/70 (2014.11)] 19 Claims
OG exemplary drawing
 
1. A method of processing a video, wherein the video comprises a plurality of frames, each frame comprising blocks of samples, the method comprising, for at least a current block:
selecting, during a conversion between the current block of the video and a bitstream of the video, a first template for the current block;
determining a cost of using each of a plurality of candidate intra prediction modes (IPMs) to predict samples in a template region, wherein determining the cost of using each of the plurality of candidate IPMs to predict samples comprises determining one or more lines of template-reference samples neighboring the first template based on the first template;
selecting a derived IPM from the plurality of candidate IPMs based on the cost; and
predicting the samples in the current block with intra-prediction using the derived IPM; and
performing the conversion based on the predicting,
wherein selecting the template is dependent on coded information including at least one of: block size, color format, single or dual tree partitioning, color component, slice type or picture type.