JVET-AO0012 JVET AHG report: Enhanced compression beyond VVC capability (AHG12) [M. Karczewicz, Y. Ye, L. Zhang (co-chairs), B. Bross, R. Chernyak, X. Li, K. Naser, Y. Yu (vice-chairs)]
Activities
The primary activity of the AHG was the “Exploration experiment on enhanced compression beyond VVC capability” (JVET-AN2024). The combined improvements of the ECM-19.0 over VTM-11.0ecm19.0 anchor for AI, RA and LB configurations are:
All Intra Main10 | |||||
Y | U | V | EncT | DecT | |
Class A1 | -14.87% | -16.35% | -27.31% | 1204.8% | 601.9% |
Class A2 | -21.54% | -25.02% | -29.24% | 1102.5% | 644.2% |
Class B | -15.11% | -23.02% | -20.90% | 1040.4% | 605.5% |
Class C | -15.30% | -12.03% | -13.20% | 1010.8% | 600.4% |
Class E | -19.69% | -23.36% | -21.40% | 994.8% | 634.1% |
Overall | -16.95% | -19.86% | -21.73% | 1061.7% | 614.7% |
Class D | -13.04% | -8.61% | -9.49% | 1002.9% | 671.9% |
Class F | -31.03% | -35.19% | -35.37% | 759.6% | 776.4% |
Class TGM | -43.73% | -49.29% | -48.58% | 588.9% | 687.7% |
Random Access Main 10 | |||||
Y | U | V | EncT | DecT | |
Class A1 | -27.70% | -25.43% | -37.71% | 1235.5% | 1313.9% |
Class A2 | -30.98% | -35.54% | -40.94% | 1190.4% | 1511.6% |
Class B | -25.57% | -34.66% | -31.70% | 1013.7% | 1221.9% |
Class C | -27.32% | -24.94% | -25.55% | 1136.5% | 1427.0% |
Class E | |||||
Overall | -27.55% | -30.40% | -33.11% | 1122.8% | 1348.3% |
Class D | -28.00% | -24.79% | -26.22% | 1058.8% | 1531.7% |
Class F | -33.69% | -37.31% | -38.21% | 959.7% | 1004.2% |
Class TGM | -43.03% | -48.96% | -48.99% | 829.8% | 842.2% |
Low Delay B Main 10 | |||||
Y | U | V | EncT | DecT | |
Class A1 | |||||
Class A2 | |||||
Class B | -22.69% | -41.03% | -35.94% | 994.3% | 1080.4% |
Class C | -25.22% | -29.20% | -31.15% | 970.5% | 1123.2% |
Class E | -22.82% | -29.50% | -27.98% | 1004.6% | 706.9% |
Overall | -23.57% | -34.21% | -32.35% | 988.8% | 984.3% |
Class D | -26.68% | -30.77% | -32.61% | 996.2% | 1268.5% |
Class F | -31.47% | -41.72% | -42.29% | 951.1% | 951.5% |
Class TGM | -41.32% | -51.82% | -51.52% | 777.6% | 692.2% |
The rate reduction for natural sequences over VTM in RA configuration for {Y, U, V} increased from ECM-18.0’s {-27.37%, -29.94%, -32.58%} to ECM-19.0’s {-27.55%, -30.40%, -33.11%}. For SCC sequences (class TGM) the rate reduction for RA configuration changed from ECM-18.0’s -43.07%, -48.90%, -48.87} to ECM-19.0’s { -43.03%, -48.96%, -48.99%}.
Contributions
In addition to 23 EE2 contributions, 13 (comparing to 42 last meeting) EE2-related and AHG12-related contributions were received. The EE2-related and AHG12-related contributions can be subdivided as follows:
- Intra (8)
JVET-AO0092, "Non-EE2: Gradient based Multi-Model EIP", P.-K. Liu, C.-Y. Liu, C.-C. Lin, S.-P. Wang, C.-H. Yau, C.-L. Lin (ITRI)
JVET-AO0153, "AHG 12/17: On EIP in JVET-AN0267 software", Z. Xie, L. Xu, Y. Yu, H. Yu, D. Wang (OPPO)
JVET-AO0154, "AHG 12/17: IntraTMP on JVET-AN0267 software", L. Zhang, F. Wang, Y. Yu, H. Yu, D. Wang (OPPO)
JVET-AO0163, "Non-EE2: Improvement on chroma MPM", Z. Li, W. Niu, X. Zeng, M. Jia, Y. Wang, C. Huang (ZTE)
JVET-AO0174, "Non-EE2: Modification of EIP filter shapes", Y. Liu, Z. Zhang, Y. Huo, Z. Zhang, J. Cai (Transsion)
JVET-AO0175, "Non-EE2: Scharr Filter for Rectangular blocks", A. C. Sidiya, S. Deshpande (Sharp)
JVET-AO0200, "AHG12: Tensor-Based Intra Mode Derivation in VTM and JVET-AN0267 software", Y.-U. Yoon, H. Huang, L.-F. Chen, R. Chernyak, S. Liu (Tencent)
JVET-AO0218, "Intra lfnstIdx Prediction", Y. Wang, R. Chernyak, S. Liu (Tencent)
- Cross Component Prediction (1)
JVET-AO0146, "EE2-related: Clipping operation refinements of Test 1.10 for the CCCM modes", P. Onno, G. Laroche, B. Galmiche (Canon)
- In Loop Filters (1)
JVET-AO0071, "AHG12: Simplification on TALF", L. Xu, N. Song, Y. Yu, H. Yu, D. Wang (OPPO)
- Coefficients Quantization (1)
JVET-AO0139, "AhG12: On the Dead-Zone in Quantization", M. Balcilar, M. Blestel, P. Andrivon (Ofinno)
- Entropy Coding (1)
JVET-AO0199, "Non-EE2: Counter-based Temporal Probability Initialization for Temporal CABAC", Z. Xiang, R. Chernyak, H. Huang, S. Liu (Tencent)
- Other (1)
JVET-AO0220, "AHG12: Optimizations for JVET-AN0271 software”, Y.-J. Chang, C.-C. Chen, M. Coban, K. Cui, P. Garus, N. Hu, M. Karczewicz, P.-H. Lin, X. Meng, V. Menon, V. Seregin, Y. Shao, G. Verba, H. Wang, E. Ye, R. Yu, Y. Zhang, Z. Zhang, W. Zhu (Qualcomm)
Recommendations
The AHG recommended:
- To review all the related contributions.
Regarding contributions on JVET-AN0267 and JVET-AN0271, see notes under AHG10. JVET should not work collectively on further optimization of those packages.