Opened 3 weeks ago

Last modified 2 weeks ago

#555 new defect

Issues of the parameters of deblocking filter in the specification text

Reported by: XieFuchun Owned by:
Priority: minor Milestone:
Component: spec Version: VVC D6 vE
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

In 8.8.3.6.1 Decision process for luma block edges,

the sentence: “The sample values pi,k and qj,k with i = 0..maxFilterLengthP, j = 0..maxFilterLengthQ and k = 0 and 3 are derived as follows:” should be updated to “The sample values pi,k and qj,k with i = 0..max(2, maxFilterLengthP) , j = 0..max(2, maxFilterLengthQ) and k = 0 and 3 are derived as follows:”.

Otherwise, for the case CU 4x4, maxFilterLengthP = 1 and maxFilterLengthQ= 1, the obtained results for the equations (8-1066), (8-1067), (8-1068), and (8-1069) are wrong, and so the final decision for the luma deblocking process is not good. Please check it.

Change history (2)

comment:1 Changed 3 weeks ago by XieFuchun

  • Version changed from VVC D6 vC to VVC D6 vE

In 8.8.3.6.1 Decision process for luma block edges,

the sentence: “The sample values pi,k and qj,k with i = 0..maxFilterLengthP, j = 0..maxFilterLengthQ and k = 0 and 3 are derived as follows:” should be updated to “The sample values pi,k and qj,k with i = 0..max(2, maxFilterLengthP) , j = 0..max(2, maxFilterLengthQ) and k = 0 and 3 are derived as follows:”.

Otherwise, for the case CU 4x4, maxFilterLengthP = 1 and maxFilterLengthQ= 1, the obtained results for the equations (8-1077), (8-1078), (8-1079), and (8-1080) are wrong, and so the final decision for the luma deblocking process is not good. Please check it.

comment:2 Changed 2 weeks ago by Kenneth

Good catch. Agree to the suggestion.

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