Organisation internationale de normalisation

CE7 related (string matching for palette index coding) (0)

8. CE8 related (single-colour and two-colour modes) (4)

See notes for CE8. No action.

13.0.0.1.1.1.1.1.273JCTVC-S0050 Non-CE8: Combination of CE8 Test A and CE8 Test B for screen content coding [Y.-J. Chang, C.-C. Lin, C.-L. Lin, J.-S. Tu, C.-H. Hung (ITRI)]

13.0.0.1.1.1.1.1.274JCTVC-S0208 CE8-related: Crosscheck for combination of CE8 Test A and CE8 Test B for screen content coding (JCTVC-S0050) [Y.-W. Chen (MediaTek)] [late]

9. CE9 related (intra boundary filtering and cross-component prediction Interdependency) (2)

(Consideration of this topic was chaired by JRO on Monday 10-20 p.m.)

13.0.0.1.1.1.1.1.275JCTVC-S0046 Non-CE9: Intra-boundary filter control for non-camera captured content [C. Rosewarne, M. Maeda (Canon)]

This document proposes a method for controlling the intra-boundary filter. The method makes use of the prediction modes of neighbouring blocks to control the filter. It is reported that the proposed methods achieve average −1.6%, −1.0%, −1.0% bit-rate saving and −1.3%, −0.9%, −0.9% bit-rate saving for RGB, Mixed Content, AI lossy coding for 1440p and 1080p classes respectively. For RA case, the corresponding result in 1440p class is −1.3%, −0.8%, −0.8% and for LB case, the corresponding result in 1440p class is −1.0%, −0.6% and −0.4%.

IBF is enabled dependent on prediction modes of neighboring blocks. IBF is operated over all three prediction modes. This goes beyond the proposals of the CE, as it is not only about global control, but introduces some new mode dependent (of neighboring blocks) control mechanism.

The gain is slightly higher (0.2-0.3%), not consistently over classes than for CE9 test A.2 (always enabling IBF “as is”). This does not justify the change and additional dependency.

No action.

13.0.0.1.1.1.1.1.276JCTVC-S0298 Cross-check report of JCTVC-S0046 Intra-boundary filter control for non-camera captured content [K. Rapaka (Qualcomm)] [late]
13.0.0.1.1.1.1.1.277JCTVC-S0199 Non-CE9: On chroma boundary filtering [F. Zou, R. Joshi, W. Pu, V. Seregin, M. Karczewicz (Qualcomm)] [late]

This proposal presents a chroma boundary filter design based on the chroma-from-luma derived mode for 4:4:4 chroma format. The simulation results report that the proposed method achieves 1.5% and 1.3% BD-rate savings for mixed content RGB 1440p and 1080P respectively against the SCM2.0 anchor in the full frame intra BC test condition.

The gain is only slightly higher than the CE methods, but would imply changes to IBF at the block level. This does not justify the change and additional dependency.

No action.

13.0.0.1.1.1.1.1.278JCTVC-S0293 Non-CE9: cross-check of chroma boundary filtering (JCTVC-S0199) [B. Li, J. Xu (Microsoft)] [late]

10.