Opened 6 months ago

Closed 6 months ago

#1361 closed defect (fixed)

Missing the text of level restrictions on maximum tile width for line buffer reduction (JVET-Q0065)

Reported by: mikeda Owned by:
Priority: major Milestone:
Component: spec Version: VVC D10 vG
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

In the Brussels meeting, JVET-Q0065 which is "Level restrictions on maximum tile width for line buffer reduction" was adopted. Please see page-293 in the meeting notes, JVET-Q_Notes_dI.docx.

However, it seems there is no description about that in the latest text.

The suggested changes are as follows: (please see the bold text)

A.4 Tiers and levels
A.4.1 General tier and level limits

When the specified level is not level 15.5, bitstreams conforming to a profile at a specified tier and level shall obey the following constraints for each bitstream conformance test as specified in Annex C:

  • a) PicSizeMaxInSamplesY shall be less than or equal to MaxLumaPs, where MaxLumaPs is specified in Table 135.
  • b) The value of PicWidthMaxInSamplesY shall be less than or equal to Sqrt( MaxLumaPs * 8 ).
  • c) The value of PicHeightMaxInSamplesY shall be less than or equal to Sqrt( MaxLumaPs * 8 ).
  • d) For each referenced PPS, the value of NumTileColumns shall be less than or equal to MaxTileCols and the value of NumTilesInPic shall be less than or equal to MaxTilesPerAu, where MaxTileCols and MaxTilesPerAu are specified in Table 135.
  • e) For each referenced PPS, the width of the i-th tile column, which is obtained by the value of ( colWidthVal[i] * CtbSizeY ) for at least one value of i in the range of 0 to NumTileColumns - 1, inclusive, shall be less than or equal to Sqrt( MaxLumaPs * 2 ) if the specified level is more than or equal to level 4.0. Otherwise (the specified level is below level 4.0), it shall be less than or equal to Sqrt( MaxLumaPs * 8 ).
  • f) ...

Change history (1)

comment:1 Changed 6 months ago by yk

  • Resolution set to fixed
  • Status changed from new to closed

Thanks. Will be fixed in JVET-S2001-vH.

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