#882 closed defect (fixed)

WPP vs. entropy coding sync naming

Reported by: ksuehring Owned by:
Priority: minor Milestone:
Component: spec Version: VVC D8 vB
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

In the SPS we have

	sps_entropy_coding_sync_enabled_flag	u(1)
	if( sps_entropy_coding_sync_enabled_flag )	
		sps_wpp_entry_point_offsets_present_flag	u(1)

Using WPP in the name of sps_wpp_entry_point_offsets_present_flag is a bit weird since WPP is not a term we use anywhere else in the spec.

Renaming should be considered for consistency.

Change history (5)

comment:1 Changed 20 months ago by jeromnhsu

In (145), it is "sps_entry_point_offsets_present_flag" in use instead of "sps_wpp_entry_point_offsets_present_flag".
Suggest to fix this also.

comment:2 Changed 20 months ago by ksuehring

What is (145) ?

comment:3 Changed 20 months ago by jonathang

I think he's referring to Equation (145), which is in section 7.4.8.1

comment:4 Changed 20 months ago by yk

We also use "Wpp" in a few variables like TableStateIdx0Wpp.

Equation 145 has already been fixed in vC.

The naming of WPP or "entropy_coding_sync" has a long history since HEVC, I personally think it'd probably be better to readers if we use a form of "WPP" instead of "entropy_coding_sync", but people have different opinions herein. Indeed, at least we should use only one form in a consistent manner. But on the other hand, simply replacing all current occurrences of "wpp"/"Wpp" in the text with "ecs"/"Wpp" does not look very good, either. Thus, no action has been taken in this regard at the moment.

More concrete suggestions herein are welcome! Let's see whether we can converge on something. If not, we can just leave this ticket open and let the editor team discuss and decide at a face-to-face post-meeting edition session.

comment:5 Changed 17 months ago by yk

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

This has been resolved in JVET-R2001. The syntax element name has been changed to sps_entry_point_offsets_present_flag, to control the presence of entry points for both tiles and WPP.

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