Method for signaling virtual boundary signaling with subpictures in coded video stream
摘要
說明書
In the same or another embodiment, sps_subpic_id_len_minus1 plus 1 specifies the number of bits used to represent the syntax element sps_subpic_id[i], the syntax elements pps_subpic_id[i], when present, and the syntax element slice_subpic_id, when present. The value of sps_subpic_id_len_minus1 may be in the range of 0 to 15, inclusive. The value of 1<<(sps_subpic_id_len_minus1) may be greater than or equal to sps_num_subpics_minus1+1.
In the same or another embodiment, when the number of subpictures is equal to 1, subpic_info_present_flag may be equal to 0 and the subpicture partitioning information may not be explicitly signalled, because the subpicture width and height information is equal to the picture width and height information and the left-top position of the subpicture is equal to the left-top position of the picture in that case.
