JVET-AN0318 AHG17 – Review of CfE responses [K. Naser, F. Le Léannec, F. Galpin, E. François (InterDigital)] [late]

This contribution provides an overall review of the CfE responses in this meeting cycle. The 4 sets of responses reported in JVET-AN0085, JVET-AN0198, JVET-AN0212 and JVET-AN0267 are reviewed and their performance trends are analyzed. This review can be useful in discussing the performance of these responses and for the further work of defining a potential CfP.

The analysis of the different responses to the CfE may lead to the two following main comments.

• Many of the UHD contents turn out to be easy to encode. It may be necessary in view of a potential CfP to consolidate the test set with more challenging UHD test content.
• In some CfE responses, Adaptive Resolution Coding was used and shows quite good performance. This good performance is also strongly linked to the limited encoding complexity of the test content. Considering ARC for CfP would require taking care of also using it for the anchors.

It was commented that it has always been the case that higher resolution sequences can be more efficiently compressed, and challenging test material needs to be carefully selected. This is also the case for 8K. Also RPR typically works better at higher resolutions.