Patent ID: 11882275
Assignee: INTELLECTUAL DISCOVERY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. An image encoding method comprising:
determining an intra prediction mode of a current block;
determining whether to apply a first filter for neighboring samples of the current block based on the intra prediction mode of the current block and a size of the current block;
filtering the neighboring samples to generate filtered neighboring samples based on the determination that the first filter is applied to the neighboring samples;
applying a second filter for the filtered neighboring samples to generate reference samples;
generating a prediction block of the current block based on the reference samples;
generating a residual block of the current block based on the prediction block; and
encoding the residual block of the current block into a bitstream,
wherein the second filter is an interpolation filter which uses four samples among the filtered neighboring samples.