Opened 9 years ago

Closed 9 years ago

#298 closed defect (wontfix)

Bug related to 1-pass / 2-pass ALF in HM5.1 (and HM 5.0)

Reported by: yamakage Owned by:
Priority: minor Milestone:
Component: HM Version: HM-5.1
Keywords: Cc: fbossen, ksuehring, davidf, jct-vc@…

Description

We observed significant loss of BD-rate for 1-pass / 2-pass ALF in HM5.1 (and HM 5.0). The loss seems to be introduced when integrating JCTVC-G665 (prediction for ALF coefficients). In the function "decideFilterShapeLuma", filter coefficients are changed incorrectly by this bug.

The recommended bug fix is attached.

Attachments (2)

HM5.1patch_ALF_Npass_fixed.patch (860 bytes) - added by yamakage 9 years ago.
HM5.0patch_ALF_Npass_fixed.patch (860 bytes) - added by yamakage 9 years ago.

Download all attachments as: .zip

Change History (4)

comment:1 Changed 9 years ago by DefaultCC Plugin

  • Cc fbossen ksuehring davidf jct-vc@… added

Changed 9 years ago by yamakage

Changed 9 years ago by yamakage

comment:2 Changed 9 years ago by ksuehring

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

ALF has been removed from the spec

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

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

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