Opened 10 years ago

Closed 9 years ago

#1289 closed defect (fixed)

cbr_flag set by encoder

Reported by: ksuehring Owned by: ksuehring
Priority: minor Milestone: HM-16.5
Component: HM Version: HM-14.0
Keywords: Cc: fbossen, ksuehring, davidf, jct-vc@…


When Timing SEI is enabled, the encoder sets cbr_flag equal to 1 in the VUI. Bit rates are set equal to the bit rate specified for rate control, even if rate control is disabled.

There is no mechanism to control the bit rate to match any of the HRD constraints, especially not for cbr_flag equal to 1.

HRD checks are missing in general in both encoder and decoder. Conformance of bitstreams cannot be guaranteed unless at least basic checks get implemented.

Change History (6)

comment:1 Changed 10 years ago by DefaultCC Plugin

  • Cc fbossen ksuehring davidf jct-vc@… added

comment:2 Changed 9 years ago by ksuehring

  • Milestone set to HM-17.0
  • Owner set to ksuehring
  • Status changed from new to assigned

comment:3 Changed 9 years ago by ksuehring

  • Milestone changed from HM-16.3 to HM-next

comment:4 Changed 9 years ago by ksuehring

  • Milestone changed from HM-16.4 to HM-next

comment:5 Changed 9 years ago by ksuehring

  • Milestone changed from HM-next to HM-16.5

comment:6 Changed 9 years ago by ksuehring

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

The flag has been disabled in the HRD parameters in r4428

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  • David Flynn(Subscriber)
  • Frank Bossen(Subscriber)
  • jct-vc@…(Subscriber)
  • karl.sharman@…(Always)
  • Karsten Suehring(Reporter, Owner, Subscriber, Participant, Always)