Opened 8 years ago

Closed 8 years ago

#1183 closed defect (fixed)

Error in specification of refMatrixId

Reported by: peterderivaz Owned by:
Priority: minor Milestone: RExt D5
Component: RExt text Version: RExt D4 (N1005) v3
Keywords: Cc: davidf, joel, teruhiko, jct-vc@…

Description

In 7.4.5 Scaling list data semantics, equation 7-35 defines refMatrixId as:

refMatrixId = matrixId − scaling_list_pred_matrix_id_delta[ sizeId ][ matrixId ]

and restricts scaling_list_pred_matrix_id_delta[ sizeId ][ matrixId ] to be in the range 0 to matrixId.

However, in 7.3.4 Scaling list data syntax, matrixId now takes the values 0 and 3 when sizeId==3. (In previous versions of the spec it took the values 0 and 1.)

I believe equation 7-35 should be modified to be:

refMatrixId = matrixId − scaling_list_pred_matrix_id_delta[ sizeId ][ matrixId ] * ( sizeId == 3 ? 3:1)

and the restriction for scaling_list_pred_matrix_id_delta should be modified to correspond to the different behaviour when sizeId==3.

Change History (2)

comment:1 Changed 8 years ago by DefaultCC Plugin

  • Cc davidf joel teruhiko jct-vc@… added

comment:2 Changed 8 years ago by davidf

  • Milestone set to RExt D5
  • Resolution set to fixed
  • Status changed from new to closed

Fixed in O1005v1

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  • David Flynn(Subscriber, Participant)
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  • Peter de Rivaz(Reporter)
  • Teruhiko Suzuki(Subscriber)