Patent ID: 11863798
Assignee: INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A non-transitory computer-recordable medium for storing a bitstream generated by an image encoding method,
wherein the image encoding method includes:
performing prediction for a current block using a prediction mode for the current block;
determining a transform kernel of the current block;
generating at least one coefficient of the current block by performing a transform on residual samples of the current block, based on the transform kernel; and
encoding transform kernel information indicating the transform kernel of the current block and the at least one coefficient of the current block,
wherein the transform comprises a primary transform and a secondary transform,
wherein the at least one coefficient is generated by performing the secondary transform on a result of the primary transform on the residual samples using the transform kernel,
wherein the transform kernel information is an index indicating one of predefined transform kernel sets as the transform kernel of the current block,
wherein each of the predefined transform kernel sets comprises a predefined horizontal transform kernel and a predefined vertical transform kernel,
wherein the transform kernel of the current block comprises a horizontal transform kernel and a vertical transform kernel, and
wherein the horizontal transform kernel and the vertical transform kernel of the transform kernel of the current block are determined based on a partition form specifying how many sub-blocks the current block is partitioned into, a size of the current block, whether inter prediction is used for the prediction for the current block or not and whether intra prediction is used for the prediction for the current block or not.