JVET-Y0248 AHG3: per-picture configuration for VTM [P. de Lagrange (InterDigital)] [late]

This was presented in session 24 at 0030 UTC.

This contribution proposes to add a per-picture configuration capability to VTM. An implementation with update support of a few parameters is available in merge request !2032. Per-picture configuration takes the form of an update file where each line contains a POC and a command line.

The configuration update file consists in a sequence of <poc> : <parameters> lines. Parameters are limited to those supported for per-picture update (currently a few PH/SH related parameters.

Changing parameters in SPS and PPS is not currently supported because of the current state of the VTM, which allocates fixed SPS/PPS. Supporting SPS/PPS change would require more work.

It was asked what would be useful cases to be tested, and evidence about advantages.

One example given is a change of QP at a certain frame.

This was to be further studied.

Implementation studies (4)

Contributions in this area were discussed in session 22 at 1520–1720 UTC on Thursday 20 Jan. 2022 (chaired by Frank Bossen).