Opened 9 years ago

Closed 9 years ago

#631 closed defect (fixed)

missing value in ctxIdxMap

Reported by: Smarter Owned by: bbross
Priority: minor Milestone: D8
Component: Text Version: D7 (I1003) d9
Keywords: Cc: bbross, wjhan, jct-vc@…

Description

The ctxIdxMap in Table 9-70 used for the derivation of ctxIdxInc for significant_coeff_flag in section 9.3.3.1.4 does not define ctxIdxMap[15], but this value is needed, for example if xC = 6, yC = 6, log2TrafoWidth = 3, log2TrafoHeight = 3, then:
sigCtx = ((xC + yC) = = 0) ? 0 : ( 9 + ctxIdxMap[ ((yC >> 1 ) << 2) + (xC >> 1) ] )
sigCtx = 9 + ctxIdxMap[15]

In the HM, the equivalent map is ctxIndMap and ctxIndMap[15] = 8.

Change History (3)

comment:1 Changed 9 years ago by DefaultCC Plugin

  • Cc bbross wjhan jct-vc@… added

comment:2 Changed 9 years ago by bbross

  • Milestone set to D8

The ctxIdxMap for 8x8 blocks will be removed in D8 by the integration and adoption of the removal of 8x2 and 2x8 CGs
(JCTVC-J0256).

comment:3 Changed 9 years ago by bbross

  • Resolution set to fixed
  • Status changed from new to closed
Note: See TracTickets for help on using tickets.

This list contains all users that will be notified about changes made to this ticket.

These roles will be notified: Reporter, Owner, Subscriber, Participant

  • Benjamin Bross(Owner, Subscriber, Participant)
  • Guillaume Martres(Reporter)
  • jct-vc@…(Subscriber)
  • karl.sharman@…(Always)
  • Karsten Suehring(Always)
  • Woo-Jin Han(Subscriber)