JVET-AD0137 [AHG8] SEI for encoder optimization information [C. Kim, Hendry, D. Gwak, J. Lim (LGE)]

This contribution also fits under section 6.2.

This was to be discussed Tuesday morning together with SEI experts.

JVET-AD0137 [AHG8] SEI for encoder optimization information [C. Kim, Hendry, D. Gwak, J. Lim (LGE)]

This contribution also fits under section 4.10.

At the last meeting, AHG8 provided a description of optimization techniques for video encoders and receiving systems. However, a method for identifying optimization has not been described. This contribution proposes the SEI message to indicate whether encoding optimization is applied and what optimization methods is used.

Different from JVET-AD0060, this proposal contains a list of “optimization methods” which let the decoding device know which manipulations have been applied, e.g. temporal or spatial subsampling, ROI preprocessing, etc. It could be combined with any of the VUI signalling approaches of JVET-AD0060 (perhaps leaving out the annotated regions, as region emphasis is included here.

It was commented that the list of “optimization methods” should appear in the SEI message itself rather than pointing to the TR.

It was commented that starting the SEI with the cancellation flag may be undesirable. Mechanisms of cancelling should be implemented similar to other SEI messages.

It was commented that the SEI message may require more study; in terms of extensibility, it has a similar problem as the SEI messages for purpose signalling.

It was commented that a flag would be desirable indicating that the video is not intended for human viewing (similar to the annotated regions SEI message).

Frther study was recommended.

Further discussion was held in the joint meeting with WG 4.