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43rd Meeting: Geneva, July 2026
AHG9: On delayed transmission of QM SEI
Authors: Thibaud Biatek Nokia Shane He Nokia Jill Boyce Nokia Miska M. Hannuksela Nokia
Abstract
The current QM SEI design support carriage of quality metric pertaining to the coded picture it is associated with. However, ultra-low latency encoding may require sending the coded picture before the quality metric is computed, due to strict constraint on encoding delay budget. In this ultra-low latency case, a quality metric for a given frame may be sent attached with a future access unit. This contribution proposes enabling delayed transmission of QM SEI messages.
Meeting Notes
JVET-AQ0124 AHG9: On delayed transmission of QM SEI [T. Biatek, S. He, J. Boyce, M. M. Hannuksela (Nokia)]

Chaired by S. Deshpande during 19:20-19:40 on 8 July 2026.

The current QM SEI design support carriage of quality metric pertaining to the coded picture it is associated with. However, ultra-low latency encoding may require sending the coded picture before the quality metric is computed, due to strict constraint on encoding delay budget. In this ultra-low latency case, a quality metric for a given frame may be sent attached with a future access unit. This contribution proposes enabling delayed transmission of QM SEI messages.

Aspect 1 : Add editor’s note : agreed

Aspect 2: Adding the NOTE: agreed with some rewording about “low-latency” delegated to the editors.

Aspect 3: It was asked what is the exact low latency use case which needs this. This proposal brings in the aspect of POC into QM. SVTA indicates delayed quality via time offsets. It was asked what is the case where there is delay of multiple pictures. It was commented that usually the time taken to compute quality will be much less that the encoding time and why multiple picture delay is needed.

References:
JVET-AQ0125
Cited:
JVET-AQ0009 JVET-AQ0018 JVET-AQ2032
ARCHIVE v2 :
JVET-AQ0124-v1.docx
Decisions
Aspect 3: It was asked what is the exact low latency use case which needs this. This proposal brings in the aspect of POC into QM. SVTA indicates delayed quality via time offsets. It was asked what is the case where there is delay of multiple pictures. It was commented that usually the time taken to compute quality will be much less that the encoding time and why multiple picture delay is needed.
Citation