Opened 8 years ago

Closed 8 years ago

#1179 closed defect (wontfix)

Inconsistent initialisation values for intra_bc_flag

Reported by: peterderivaz Owned by:
Priority: major Milestone: RExt D7
Component: RExt text Version: RExt D4 (N1005) v3
Keywords: Cc: davidf, joel, teruhiko, jct-vc@…

Description

Table 9-33 Values of initValue for ctxIdx of intra_bc_flag has the following values:

185 185 201 197 197 185 197 197 185

In order to match the code in table INIT_INTRABC_PRED_FLAG of ContextTables.h I believe these values should be:

197 197 185 197 197 185 185 185 201

Note that the values appear in I/P/B order in the specification, but in B/P/I order in the code.

This ordering issue has caused problems before, for example, see https://hevc.hhi.fraunhofer.de/trac/hevc/ticket/712

By the way, in table 9-34 the specification has a typo and lists "intra_mc_flag" instead of "intra_bc_flag".

Change History (4)

comment:1 Changed 8 years ago by DefaultCC Plugin

  • Cc davidf joel teruhiko jct-vc@… added

comment:2 Changed 8 years ago by davidf

Typo regarding intra_bc_flag has been fixed in O1005v1

comment:3 Changed 8 years ago by davidf

  • Milestone set to RExt D7

comment:4 Changed 8 years ago by davidf

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

IntraBC has been removed from the text.

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  • Peter de Rivaz(Reporter)
  • Teruhiko Suzuki(Subscriber)