Patent ID: 11882290
Assignee: HFI INNOVATION INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method of video coding using a Matrix-based Intra Prediction (MIP) mode, the method comprising:
receiving input data related to a current block in a current picture at a video encoder side or receiving a video bitstream comprising coded data of the current block at a video decoder side;
when the MIP mode is applied to the current block:
checking availability for a target reference boundary region comprising left reference boundary samples and top reference boundary samples, wherein the left reference boundary samples and the top reference boundary samples are checked jointly for the current block;
performing a padding process if an unavailable sample exists in the target reference boundary region, wherein the unavailable sample is padded with a default value or a sample value of an available sample;
deriving a reduced predictor, wherein said deriving the reduced predictor comprises applying matrix multiplication on a boundary vector and adding an offset, wherein the boundary vector is derived from the target reference boundary region; and
encoding or decoding the current block using a MIP predictor derived from the reduced predictor.