JVET-AM0203 AHG18: Full VTM tool set in ultra-low latency test scenario [V. Khamidullin, I. Gribushin, S. Ikonin, E. Alshina (Huawei)]

Ultra-low latency simulation software of AHG18 is currently using simplified encoding configuration with reduced coding tools set originally as it was originally proposed in contribution JVET-AK0193 for sake of VTM software stability on packet loss scenario and simulations speedup. This contribution proposes to enable back full set of VTM coding tools and reports its performance under ultra-low latency test scenario using fast encoding configuration VTM-Reduced-runtime-3 proposed in JVET-AL0055 and used in draft CfE Section 3 (fast encoding) of JVET-АМ0041.

A specific problem that is solved is the possible unavailability of APS.

It was commented that such a software change would no longer allow testing conformant decoder behaviour. It is however pointed out that in case of incomplete bitstreams no conformant behaviour is defined in VVC. There is no normative concealment, etc. Even frame freeze is not normative.

It was asked if the concept could be used together with multi-layer functionality. This should basically be possible, but has not been tested.

It was agreed that the software should be made available in a software branch for further study in AHG (not the main branch currently)