JVET-AG0063 EE2-1.2 related: AR-BVP for IntraTMP merge candidates [L. Zhang, Y. Yu, F. Wang, H. Yu, D. Wang (OPPO)]

IntraTMP with merge candidates is investigated in EE2-1.2. This contribution proposes to add auto relocated block vector prediction (AR-BVP) to the IntraTMP merge candidate list to further improve the coding efficiency. Specifically, the AR-BVP candidates are inserted after the spatial candidates during the construction of IntraTMP merge candidate list.

On top of ECM11.0, simulation results of the proposed method + EE2-1.2 are reported as below:

The proposed method + EE2-1.2 over ECM-11.0 :

AI: { -0.13% Y, -0.10% U, -0.09% V, 101.0% EncT, 105.0% DecT } for Overall

{ -0.39% Y, -0.47% U, -0.10% V, 101.9% EncT, 105.2% DecT } for class F

{ -1.07% Y, -1.02% U, -0.99% V, 102.2% EncT, 109.4% DecT } for class TGM

The proposed method + EE2-1.2 over EE2-1.2 :

AI: { -0.07% Y, -0.06% U, -0.05% V, 99.7% EncT, 102.0% DecT } for Overall

{ -0.31% Y, -0.24% U, -0.24% V, 99.9% EncT, 101.5% DecT } for class F

{ -0.89% Y, -0.83% U, -0.80% V, 101.0% EncT, 106.5% DecT } for class TGM

RA results not complete when this contribution was presented.

This proposal adds template matching based sorting for the IntraTMP merge candidates, which is currently not part of ECM or EE2-1.2 (which was already adopted).

This proposal takes up to 50 candidates, and keeps 10 candidates after template matching-based sorting, the numbers of maximum candidates and kept candidates are the same as in EE2-1.2. It was commented that it would be desirable to test the performance with a smaller number...

JVET-AG2036 Call for training materials for neural network-based video coding tool development [E. Alshina, F. Galpin, S. Liu, M. Wien] [WG 5 N 266)] (2024-02-09)

Developed from JVET-AG0315.

The draft of WG 5 recommendations was reviewed in JVET at 0845 on Friday 26 Jan.

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

Future meeting plans were established according to the following guidelines (assuming face-to-face meetings):

• Meeting under ITU-T SG16 auspices when it meets (ordinarily starting meetings on the Tuesday or Wednesday of the first week and closing it on the Wednesday of the second week of the SG16 meeting – a total of 8-9 meeting days), and
• Otherwise meeting under ISO/IEC JTC 1/‌SC 29 auspices when its MPEG WGs meet (ordinarily starting meetings on the Thursday or Friday prior to the main week of such meetings and closing it on the same day as other MPEG WGs – a total of 8–9 meeting days).

In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined. In cases of online meetings, no sessions should be held on weekend days, such that meetings would typically start two days earlier.

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

• During Wed. 17 – Wed. 24 April 2024, 34^th meeting under ITU-T SG16 auspices in Rennes, FR,
• During Fri. 12 – Fri. 19 July 2024, 35^th meeting under ISO/IEC JTC 1/‌SC 29 auspices in Sapporo, JP,
• During Fri. 1 – Fri. 8 November 2024, 36^thmeeting under ISO/IEC JTC 1/‌SC 29 auspices in Antalya, TR (confirmed by host one week after the...

JVET-AG0243 AHG12: Additional Metric for IntraTMP [K. Naser, F. Le Léannec, T. Poirier, H. Guermoud, T. Dumas (InterDigital)] [late]

In IntraTMP mode, the best N block vectors are found using SAD metric. Specifically, the candidate block vectors are evaluated in template matching process using SAD cost. This contribution proposes further including additional metric, to find a new set of block vectors. A flag is signaled to the decoder to indicate the metric choice. On top of ECM-11.0, the following results are obtained:

• SATD as additional metric: AI: -0.10%/-0.04%/-0.06%, 102.7%, 102.7%
• MR-SAD as additional metric: AI: -0.09%/-0.04%/-0.11%, 101.7%, 100.8%

The proposal adds a new metric (either SATD or MR-SAD) in cost function for intraTMP. The encoder selects which one is used (existing SAD metric or the additional SATD/MR-SAD metric) and signals the choice to decoder. It was asked whether profiling has been done to check which metric is used how often. The proponent has not studied this aspect.

JVET-AG0193 is a related contribution, but does not signal which metric is used. It just replaces SAD with SATD in the intraTMP refinement stage.

It was agreed to investigate this in the EE. Reduction of encoder/decoder run time increase should be investigated. Interaction with JVET-AG0193, JVET-AG0063 and JVET-AG0080 should be studied, e.g. in the form of combination tests.

Inter (7)