Methods and devices for high-level syntax in video coding

A computing device, comprising:

• one or more processors;
• and
• a non-transitory computer-readable storage medium storing instructions executable by the one or more processors, wherein the one or more processors are configured to:
• receive a bitstream that includes a sequence parameter set (SPS) for video data;
• obtain arranged partition constraint syntax elements in sequence parameter set (SPS) level, wherein the arranged partition constraint syntax elements comprise intra prediction related syntax elements and inter prediction related syntax elements, and the arranged partition constraint syntax elements are arranged so that the intra prediction related syntax elements are only defined before the inter prediction related syntax elements in the SPS level;
• and
• decode the video data based on the arranged partition constraint syntax elements;
• wherein the arranged partition constraint syntax elements comprise partition constraint syntax elements for dual-tree chroma in the SPS level that are arranged together under dual-tree cases, and the partition constraint syntax elements for dual-tree chroma are defined before the inter prediction related syntax elements;
• wherein the arranged partition constraint syntax elements are arranged in sequence by:
• determine a qtbtt_dual_tree_intra_flag flag;
• set, when the qtbtt_dual_tree_intra_flag flag is true, an sps_log 2_diff_min_qt_min_cb_intra_slice_chroma value;
• and
• set an sps_log 2_diff_min_qt_min_cb_inter_slice value.

A non-transitory computer-readable storage medium storing a plurality of programs for execution by a computing device having one or more processors, wherein the plurality of programs, when executed by the one or more processors, cause the computing device to perform acts comprising:

• receiving, a bitstream that includes a sequence parameter set (SPS) for video data;
• obtaining arranged partition constraint syntax elements in sequence parameter set (SPS) level, wherein the arranged partition constraint syntax elements comprise intra prediction related syntax elements and inter prediction related syntax elements, and the arranged partition constraint syntax elements are arranged so that the intra prediction related syntax elements are only defined before the inter prediction related syntax elements in the SPS level;
• and
• decoding the video data based on the arranged partition constraint syntax elements;
• wherein the arranged partition constraint syntax elements comprise partition constraint syntax elements for dual-tree chroma in the SPS level that are arranged together under dual-tree cases, and the partition constraint syntax elements for dual-tree chroma are defined before the inter prediction related syntax elements;
• wherein the arranged partition constraint syntax elements are arranged in sequence by:
• determining a qtbtt_dual_tree_intra_flag flag;
• setting, when the qtbtt_dual_tree_intra_flag flag is true, an sps_log 2_diff_min_qt_min_cb_intra_slice_chroma value;
• and
• setting an sps_log 2_diff_min_qt_min_cb_inter_slice value.