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

Claim 6:
7. An apparatus of video coding using a Matrix-based Intra Prediction (MIP) mode, the apparatus of video coding comprising one or more electronic circuits or processors arranged to:
receive input data related to a current block in a current picture at a video encoder side or receive 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:
check 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;
perform 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;
derive a reduced predictor, wherein a process to derive the reduced predictor comprises to apply matrix multiplication on a boundary vector and to add an offset, wherein the boundary vector is derived from the target reference boundary region; and
encode or decode the current block using a MIP predictor derived from the reduced predictor.