JVET-AM0155 AHG9: On the SPO SEI message complexity signalling [Y. Gao, P. Wu, S. Xie, Y. Bai, C. Huang (ZTE)]

This contribution proposes to signal the the complexity information of one or more key processes, where a key process is defined as the sub-chain including at least one NNPF process associated with a NNPF SEI message with index i, and the sum of po_sei_importance_flag[ i ] and po_sei_processing_degree_flag[ i ] is greater than or equal to 1.

It was suggested that an alternative may be for an encoder to include in a prefix SEI information about complexity of the different chains. This alternative would have some additional bit count because other non-complexity related syntax elements would be included in the prefix, and would require some additional work by the decoder. This approach would not require any change to the existing design.It was suggested that the key process name is confusing and rename to make it more clear that it is NNPF related.

Decision: add to TuC. Editors to consider the renaming “key process”.

Encoder optimization information SEI message (1)

Contributions in this area were discussed during 1730–1820 on Saturday 28 June 2025 (chaired by J. Boyce).

JVET-AM0155 AHG9: On the SPO SEI message complexity signalling

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