JVET-V0098 EE2-related: Template-based intra mode derivation using MPMs [Y. Wang, L. Zhang, K. Zhang, Z. Deng, N. Zhang (Bytedance)]
This contribution proposes a template-based intra mode derivation (TIMD) method using most probable modes (MPMs). For each intra prediction mode in MPMs, the sum of absolute transformed differences (SATD) between the prediction and reconstruction samples of a template is calculated. The intra prediction mode with the minimum SATD is selected as the TIMD mode and used for intra prediction of current block. On top of the EE2 code of JVET-U0100, simulation results of the proposed method are reported as below:
Tool-on test (Anchor: VTM-11.0): AI: {-0.41%, 117%, 111%}; RA: {-0.23%, 109%, 107%}.
Tool-off test (Anchor: EE2 code): AI: {-0.27%, 118%, 109%}; RA: {-0.11%, 104%, 101%}.
Question: Was the MPM list derivation changed? Yes, but it is not using TM to construct the MPM list.
This is different from the current DIMD mode, and if tested in EE, it could also be tested in combination with ISP. There is no conflict with the aspect 1 from JVET-V0087.
It was clarified that the shape of the template depends on the CU size.
It was agreed to investigate this in in an EE.