JVET-AO0283 Non-EE2: Deblocking for ASBT [S. Hong, L. Wang, K. Panusopone, D. Rusanovskyy (Nokia)] [late]

In the current ECM-19.0, with Advanced Sub Block Transform (ASBT) enabled, it is asserted that mismatches in encoder and decoder reconstructed video can be triggered when deblocking filter length is being selected without considering all ASBT sub-partitions. In some cases, this could lead to filtering across the picture boundary.

Simulation results show that the mismatch problem is solved with the proposed solution.

It was commented that the case does not happen under CTC conditions. Further study is necessary to understand the problem, and understand whether the proposed solution is appropriate.

No investigation in EE2 was planned for this – see the note under JVET-AO2024.