JVET-S0259 Crosscheck of JVET-S0229 (Bug fix of BDOF for high bit-depth) [Y. Kidani, K. Kawamura (KDDI)]
Test material (1)
JVET-S0218 4K HLG test sequences for HDR verification test [S. Iwamura, S. Nemoto, A. Ichigaya (NHK)] [late]
This contribution was discussed during 2055–2115 on 26 June (chaired by JRO).
This contribution provides new 4K test sequences with Hybrid Log-Gamma (HLG) transfer characteristics. A total of 12 new sequences are provided as candidates for VVC HDR verification test. All the sequences are captured in 8K cameras without pre-compression and down converted into 4K resolution using HDRTools. Note that the chroma location type of those provided sequences is type-2 (co-sited). In the 18th JVET meeting, it was pointed out that the chroma location type of existing 7 HLG test sequences (H2_HLG1 to H2_HLG7) was type-0 (vertically interstitial) and the preference of recreation of those sequences as type-2 sequences was expressed. As per the request, the recreated existing sequences as type-2 are also provided in this contribution. Furthermore, during intermediate AHG meeting between 18th and 19th JVET meeting, 5 candidate sequences and suggested QP range were selected. The coding experiments for those sequences with the selected QP range are also provide.
The new sequences (captured in Amsterdam) come only with type-2 chroma location.
The sequences with type-2 chroma location are all named H3_... (as a new category of HLG, where H2_... is continued to be used for HLG with type-0)
Sequences are made available in the ftp test sequence site under /ahg/candidates_hdr/HLG/JVET-S0218 on the test sequences ftp site.
Five of those sequences (three new “Amsterdam” and two from previous H2 category) had already been preselected to be used in the verification test. Those two with type-0 chroma location should be replaced by those modified with type-2 chroma location (H3 category) in the final verification test.
It was asked whether 8K versions could be made available. This would be very valuable for conducting 8K verification tests. The proponent says that it is not clear if copyright could be granted for those.
Decision (CTC): Update the CTC for HDR such that type-2 sequences are used in the HLG class.
Thanks were to be expressed in WG 11 recommendations.
Conformance (0)
Meeting discussions on conformance testing development are recorded in section 3 for the relevant AHG report JVET-S0005.