JVET-AL0047 Proposed draft text: Call for Evidence on video compression with capability beyond existing standards [J.-R. Ohm, M. Wien]

V2 (a modified version from the AHG17 meeting) was presented 1625 UTC on Wednesday 26 March.

Concern was raised about the idea which came up in the AHG17 meeting, such that ECM would be a “submission” to the CfE. It was argued that ECM does not provide a reasonable “evidence” in terms of complexity tradeoff, and it might be strange if JVET responds to its own CfE. On the other hand, ECM could be seen as a reasonable comparison point in terms of compression benefit, where good evidence could be provided by proposals which achieve something comparable in compression at lower complexity.

It was therefore agreed that ECM should be retained as an anchor (as in v1 of JVET-AL0047), it could also be a reasonable comparison point for judging the compression/complexity tradeoff of other submissions.

It could anyway not be avoided that some submission uses ECM or part of it as a basis.

In principle, JVET would be prepared to define testing conditions for the purpose of investigating compression benefit (section 3 of JVET-AL0047), whereas more discussion is needed about how to investigate the complexity aspects (section 4 of JVET-AL0047), e.g. based on JVET-AL0052, to be further conducted during the meeting.

It is asserted be useful in any case to perform a “dry run” for the CfE by the next meeting, which should include rate-matched VTM and ECM anchors, and potentially other configuration e.g. from the investigations of AHG7/AHG10. It would be useful to have this as an output document (title tbd), also to allow companies knowing about the purpose to have enough time for preparing submissions for the actual CfE.

Continuation of review of other documents in this category was planned on Friday; and a meeting with parent bodies was planned on Monday.

JVET-AL0047v3 contains edits made on the basis of the discussions above.

JVET-AL0047v4 contains edits based on the conclusions and agreements from the joint meetings with parent bodies (see section 7.3.1)

Further edits based on v4 can be found as attachment to the BoG report JVET-AL0337v3, integrating the conclusions and agreements in the BoG related to reduced-runtime encoding, which had also been presented in the joint meeting and modified in some aspccts during that meeting

The BoG attachment was presented by JRO and further discussed during 1445-1555 on Friday 4 April. Numerous edits were made, and the following upload JVET-AL0047v5 was agreed to become the basis for the CfE output JVET-AL2026, to be finalized in an AHG17 telco meeting.