JVET-AQ0135 AHG9: Support of regions of update and update priority SEI message [S. He, T. Biatek, J. Boyce, M. M. Hannuksela (Nokia)]
Chaired by S. Deshpande during 19:25-20:05 on 10 July 2026.
This document proposes a new SEI message for signaling update priority information associated with a region in the output picture. The proposed SEI message enables flexible update methods for different display devices.
Q1: How often do people use E-Ink displays for video.
Q2: Is the identified selected region the update will be at higher frame rate? Refresh rate is not defined in the SEI. There is also a full refresh flag.
Q3: About full refresh flag: that is the default behavior if SEI message is not present? Why the flag is needed
Q4: Is 30 frame per second a full frame refresh? Answer: No, it is for part of screen.
Q5: Will the refresh rate improve in future E-Ink displays? Answer: Hard to predict. Also refresh costs power.
Q6: Is there ghosting effect when displaying video in E-Ink displays?
Would the ghosting last longer?
Q7: Does hardware support region to have different refresh rate?
Comment: color experience on E-Ink is not very enjoyable.
Comment: Different viewers may care for different regions of video as having high priority.
Q8: What is the bottleneck in refresh: power consumption is one bottleneck and this proposal can provide an benefit. Potentially the power consumption may be useful.
Q9: if part of the video are shown at higher refresh rate and other parts at lower rate, would the video appear “un-natural”?
Q10: Can this functionality be done by extension of packed region information SEI. Answer: No
Comment: the encoder side functionality may have conceptual overlap with spare picture SEI of AVC.
It was suggested that a showcase may be useful to see how different parts having different refresh rates show as an experience.
Also the type of content with mixed refresh rate should be carefully considered.
Further study.