JVET-W0172 On conformance point of high throughput profile [K. Kawamura, K. Unno (KDDI)] [late]

This contribution proposes an additional conformance point for high throughput conditions in operation-range extensions profile. The current buffer model with hypothetical reference decoder in VVC is well defined for both theoretical and implementation point-of-view. When the VVC is used for mezzanine compression and/or video editing, decoding latency may be unstable due to the CABAC throughput for some implementation. In this contribution, an additional conformance point for the high throughput cases is proposed based on a bit allocation of each frame.

It is commented that the motivation needs more clarification. For example, for low latency applications, peak values of throughput would need to be considered rather than a sliding window potentially covering several frames. Which length of N? Could be 5 or 6 frames. Which maximum bit rate? Depends on compression ratio.

Furthermore, delay would be introduced.

It was commented that the proposal basically tries to limit the throughput which turns into a bit rate limitation. This would not work with a high throughput mode.

It was further pointed out that the approach limits the CPB size. Furthermore, it appears that this buffer model would mostly be appropriate for CBR, not VBR

Currently this was still more at the conceptual level. A text description was announced but not available yet. That would be beneficial for better understanding the details. Further study was encouraged.

AHG11: Neural network-based video coding (20)

General...

JVET-W2026 Conformance testing for VVC operation range extensions (draft 1) [D. Rusanovskyy, J.-H. Jhu, I. Moccagatta, M. Sarwer, Y. Yu] (2021-08-31)

An initial version of this document was reviewed and approved.

Future meeting plans, expressions of thanks, and closing of the meeting

Future meeting plans were established according to the following guidelines:

• Meeting under ITU-T SG 16 auspices when it meets (ordinarily starting meetings on the Wednesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 8 meeting days), and
• Otherwise meeting under ISO/IEC JTC 1/‌SC 29 auspices when its MPEG WGs meet (ordinarily starting meetings on the Friday prior to the main week of such meetings and closing it on the same day as other MPEG WGs – a total of 8 meeting days).

In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined. In case of online meetings, no sessions should be held on weekend days. This may imply an earlier starting date as well.

Some specific future meeting plans (to be confirmed) were established as follows:

• Wed. 6 – Fri. 15 October 2021, 24^th meeting under ISO/IEC JTC 1/‌SC 29 auspices as a virtual meeting
• During January 2022, 25^th meeting under ITU-T SG16 auspices, location t.b.d.
• Fri. 22 – Fri. 29 April 2022, 26^th meeting under ISO/IEC JTC 1/‌SC 29 auspices in Alpbach, AT
• Fri. 15 – Fri. 22 July 2022, 27^th meeting under ISO/IEC JTC 1/‌SC 29 auspices in Cologne, DE.
• During October 2022, 28^th meeting under ITU-T SG16 auspices in Geneva, CH.
• During January 2023, 29^th ...