JVET-AM2024 Exploration experiment on enhanced compression beyond VVC capability (EE2) [V. Seregin, D. Bugdayci Sansli, J. Chen, R. Chernyak, K. Naser, J. Ström, F. Wang, M. Winken, X. Xiu, K. Zhang (EE coordinators)] (2025-08-01)
An initial draft of this document was reviewed and approved at 0920-0925 on Friday 4 July.
This round of EE2 tests will include:
Tests | Tester | Cross-checker | |
1 Partitioning | |||
1.1a | Restrictions for TT splitting | G.Wang (vivo) | |
1.1b | Test 1.1a as encoder-only change | G.Wang (vivo) | |
1.1c | Temporal partitioning prediction optimization | G.Wang (vivo) | |
1.1d | Test 1.1a + Test 1.1c | G.Wang (vivo) | |
1.1e | Test 1.1b + Test 1.1c | G.Wang (vivo) | |
2 Intra prediction | |||
2.1 | TMRL blend | S. Blasi (Nokia) | V. Rufitskiy (TCL) |
2.2a | Alignment of interpolation filters used in reference samples unwrapping and predictor generation | V. Rufitskiy (TCL) | |
2.2b | Disabling smoothing in interpolation and reference sample processing operations for DIMD and TIMD | V. Rufitskiy (TCL) | |
2.3a | Unification of unwrapping interpolation filters in TIMD template and block prediction | T. Dong (TCL) | |
2.3b | 8-tap interpolation filter for template generation in TIMD | T. Dong (TCL) | |
2.4 | Longer tap interpolation filtering | V. Rufitskiy (TCL) | |
2.5 | Combination of Test 2.2, Test 2.3, and Test 2.4 | V. Rufitskiy (TCL) | |
2.6a | Adaptive subsampling filter selection for CCLM/intra-CCCM/ALF-CCCM | Y. Kidani (KDDI) | |
2.6b | Adaptive subsampling filter selection for inter-CCCM | Y. Kidani (KDDI) | |
2.6c | Test 2.6a + Test 2.6b | Y. Kidani (KDDI) | |
2.7 | Reducing candidate modes in decoder derived CCP | S. Wan(NWPU) S. Xie(ZTE) | |
2.8 | Enhanced CCP Fusion mode | P.Bordes (InterDigital) | |
3 Inter prediction | |||
3.1 | Generated merge candidates | D. Bugdayci Sansli (Nokia) | |
3.2a | Joint reordering of GPM with affine prediction | L. Zhang (OPPO) | |
3.2b | Modifications to the affine merge list | L. Zhang (OPPO) | |
3.2c | Test 3.2a + Test 3.2b | L. Zhang (OPPO) | |
3.3 | Joint reordering of GPM with intra prediction | Z. Sun (OPPO) | |
3.4 | Test 3.2c + Test 3.3 | Z. Sun (OPPO) | |
4 Transform and coefficients coding | |||
4.1 | Linked sign prediction | Y. Zhang (OPPO) | |
4.2a | Shifting quantization center for TSRC under non-CTC (RDOQ on) | Y. Yu (OPPO) | |
4.2b | Shifting quantization center for RRC under non-CTC (DQ disabled, RDOQ on) | Y. Yu (OPPO) | |
4.2c | Test 4.2a + Test 4.2b | Y. Yu (OPPO) | |
4.2d | Shifting quantization center for TSRC under CTC | Y. Yu (OPPO) | |
4.2e | Shifting quantization center for RRC under CTC | Y. Yu (OPPO) | |
4.2f | Test 4.2d + Test 4.2e | Y. Yu (OPPO) | |
4.2g | Shifting quantization center for RRC under non-CTC (DQ disabled, RDOQ disabled) | M. Le Pendu (InterDigital) | |
4.2h | Shifting quantization center for TSRC under non-CTC (DQ disabled, RDOQ disabled) | M. Le Pendu (InterDigital) | |
4.2i | Test 4.2g + Test 3.2h | M. Le Pendu (InterDigital) | |
4.3a | Residual sign prediction restriction | C. Hollmann (TCL) | |
4.3b | RSP context modelling | C. Hollmann (TCL) | |
4.3c | Test 4.3a with retraining of existing contexts | C. Hollmann (TCL) | |
4.3d | Test 4.3a + Test 4.3b | C. Hollmann (TCL) | |
5 In-loop filtering | |||
5.1a | Regularization of ALF-CCCM | Z. Xie (OPPO) | |
5.1b | Regularization for ALF-CCCM enabled in I slice | Z. Xie (OPPO) | |
5.2a | Non-downsampled ALF-CCCM | L. Xu (OPPO) | |
5.2b | Reuse of CU partition in ALF-CCCM | L. Xu (OPPO) | |
5.2c | Test 5.2a + Test 5.2b | L. Xu (OPPO) | |
5.3a | Remove single model of ALF-CCCM | N. Song (OPPO) | |
5.3b | Separate “bad window” condition for Cb and Cr components | N. Song (OPPO) | |
5.3c | Test 5.3a + Test 5.3b | N. Song (OPPO) | |
5.4 | Additional models for ALF-CCCM | F. Wang (OPPO) | |
5.5a | Test 5.1 + Test 5.2 | L. Xu Z. Xie (OPPO) | |
5.5b | Test 5.1 + Test 5.2 + Test 5.4 | L. Xu Z. Xie F. Wang (OPPO) | |
5.5c | Test 5.1 + Test 5.2 + Test 5.3 + Test 5.4 | N. Song L. Xu Z. Xie F. Wang (OPPO) | |
5.6 | Reuse of TALF control information | Y. Bai (ZTE) | |