Patent ID: 11943479
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for decoding a video signal using transform, comprising:
determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal;
determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block; and
applying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index,
wherein a width of the transform region is determined as a smaller value between a width of the transform block and 16 if the horizontal transform type index is greater than 0 and determined as a smaller value between the width of the transform block and 32 if the horizontal transform type index is not greater than 0, and
wherein a height of the transform region is determined as a smaller value between a height of the transform block and 16 if the vertical transform type index is greater than 0 and determined as a smaller value between the height of the transform block and 32 if the vertical transform type index is not greater than 0.