id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 440,Issue on cu_skip_flag,wangyang.cs,,"There is one issue on cu_skip_flag in current VVC draft (JVET-O2001-vE). In the draft described below, when (slice_type == I && treeType == SINGLE_TREE && sps_ibc_enabled_flag == 1 && (cbWidth > 64 || cbHeight > 64), cu_skip_flag will be parsed. ---- 7.3.8.5 Coding unit syntax coding_unit( x0, y0, cbWidth, cbHeight, cqtDepth, treeType, modeType ) { chType = treeType = = DUAL_TREE_CHROMA? 1 : 0 if( slice_type != I | | sps_ibc_enabled_flag | | sps_palette_enabled_flag) { if( treeType != DUAL_TREE_CHROMA && !( ( ( cbWidth = = 4 && cbHeight = = 4 ) | | modeType = = MODE_TYPE_INTRA ) && !sps_ibc_enabled_flag ) ) cu_skip_flag[ x0 ][ y0 ] ---- However, largest IBC luma CU size has been limited to 64x64. The modified draft is described as follows: ---- 7.3.8.5 Coding unit syntax coding_unit( x0, y0, cbWidth, cbHeight, cqtDepth, treeType, modeType ) { chType = treeType = = DUAL_TREE_CHROMA? 1 : 0 if( slice_type != I | | sps_ibc_enabled_flag | | sps_palette_enabled_flag) { if( treeType != DUAL_TREE_CHROMA && !( ( ( cbWidth = = 4 && cbHeight = = 4 ) | | modeType = = MODE_TYPE_INTRA ) && !(sps_ibc_enabled_flag && cbWidth <= 64 && cbHeight <= 64 ) ) ) cu_skip_flag[ x0 ][ y0 ] ---- ",defect,closed,blocker,VVC D10,spec,VVC D9 vB,fixed,"cu_skip_flag, IBC CU size",ksuehring bbross XiangLi fbossen jvet@… jvet@… wangyang.cs@…