Video processing methods and apparatuses include receiving input video data associated with a current picture, signaling or parsing a first syntax element, wherein the first syntax element indicates whether to infer or predict subpicture information of a current layer of the current picture from a target layer; signaling or parsing a second syntax element to determine information about the target layer for obtaining the subpicture information of the current layer of the current picture, and encoding or decoding the current layer of the current picture using the subpicture information of the current layer of the current picture.