Patent ID: 11924469
Assignee: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. The non-transitory computer-readable recording medium of claim 16, wherein the secondary transform tool corresponds to a low frequency non-separable transform (LFNST) tool;
wherein the secondary transform tool is not applied to the current video block in a case satisfying at least one of W>T or H>T;
wherein the width (W) and the height (H) is a size characteristic of the current video block corresponds to only luma information;
wherein the current video block is a coding unit;
wherein in a case that a size of the current video block is 4*4 or 8*8, the region is corresponding to first 8 coefficients in a top-left 4*4 coding group;
wherein in a case that the width or the height of the current video block is greater than or equal to 4, and a size of the current video block is not 4*4 or 8*8, the region is corresponding to a top-left 4*4 coding group; and
wherein in response to the side information indicating that the secondary transform tool is enabled, a first syntax element indicating at least one of applying a primary transform tool and an index of transform kernels used in the primary transform tool is not present in the bitstream.