US 11,870,978 B2
Method and apparatus of matrix based intra prediction in image and video processing
Zhi-Yi Lin, Hsinchu (TW); Tzu-Der Chuang, Hsinchu (TW); and Ching-Yeh Chen, Hsinchu (TW)
Assigned to HFI INNOVATION INC., Zhubei (TW)
Filed by HFI INNOVATION INC., Zhubei (TW)
Filed on May 5, 2022, as Appl. No. 17/737,568.
Application 17/737,568 is a continuation of application No. 16/850,210, filed on Apr. 16, 2020, granted, now 11,381,808.
Claims priority of provisional application 62/838,396, filed on Apr. 25, 2019.
Prior Publication US 2022/0264088 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/105 (2014.01); H04N 19/137 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/137 (2014.11); H04N 19/176 (2014.11); H04N 19/593 (2014.11)] 13 Claims
OG exemplary drawing
 
1. A method of image or video coding, comprising:
receiving input data associated with a current block in a current picture, the current block having a size other than 4×4;
deriving reference samples of the current block from neighboring samples of the current block;
selecting a matrix for the current block;
generating intermediate predicted samples according to the reference samples and the matrix;
generating clipped intermediate predicted samples by clipping the intermediate predicted samples;
performing as up-sampling process on the clipped intermediate predicted samples to generate final predicted samples for the current block; and
encoding or decoding the current block in the current picture according to the final predicted samples of the current block,
wherein a number of clipping operations performed for producing the final predicted samples for the current block is less than a sample number of the current block.