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40th Meeting: Geneva, CH, October 2025 2025-10-12 09:48
Exploration experiment on enhanced compression beyond VVC capability (EE2)
Authors: Vadim Seregin Döne Bugdayci Sansli Jie Chen Roman Chernyak Karam Naser J. Ström Fan Wang Martin Winken Xiaoyu Xiu Kai Zhang
Abstract
This document describes Exploration Experiments (EEs) planned to be performed between 40th and 41st JVET meetings to evaluate enhanced compression tools beyond VVC capability.
Meeting Notes
JVET-AN2024 Exploration experiment on enhanced compression beyond VVC capability (EE2) [V. Seregin, D. Buğdayci Sansli, J. Chen, R. Chernyak, K. Naser, J. Ström, F. Wang, M. Winken, X. Xiu, K. Zhang (EE coordinators)] (2025-11-10)

An initial draft of this document was reviewed and approved at 1415-1420 on Sunday 12 October.

This round of EE2 tests will include:

Tests

Tester

Cross-checker

1 Intra prediction

1.1

Reference sample generation for intra prediction

T. N. Canh (Dolby)

N. Neumann (Nokia)

1.2

Combined angular- and gradient-PDPC

G. Kulupana

(Nokia)

1.3

Block prediction using the 8-tap cubic interpolation filter in SGPM

J. Lee

(KAU)

J. Lee

(ETRI)

Y. Bai

(ZTE)

1.4

Position-dependent weighted prediction extension

Y. Wang

(ZTE)

S. Blasi

(Nokia)

1.5a

Test the threshold for block size larger than 32

S.Wan

(NWPU)

S. Xie

(ZTE)

1.5b

No reference sample smoothing for all block sizes

S.Wan

(NWPU)

S. Xie

(ZTE)

1.6a

Adding DIMD and MDIP average mode to MPM

W. Niu

(ZTE)

1.6b

MDIP mode modification

W. Niu

(ZTE)

1.6c

Test 1.6a + Test 1.6b

W. Niu

(ZTE)

1.7

Multiple candidate selection for MDIP

L. Wang

(Xidian Univ)

1.8

IntraTMP with DMVR

K. Naser

(InterDigital)

1.9

TMRL angle offset refinement

G. Rath

(InterDigital)

D. Ruiz

(Ofinno)

1.10

CCCM with clipping

L.-C. Xu

(SYSU)

2 Inter prediction

2.1

GPM without blending for screen content

J. Kim


(WILUS)

2.2

On improving adaptive GPM blending

Z. Zhang

(Transsion)

2.3a

Sub-block merge mode availability extension with enlarged block set and without CU size limitation

Y. Liu

(Transsion)

F. Wang

(OPPO)

2.3b

Sub-block merge mode availability extension with enlarged block set and CU size limitation

Y. Liu

(Transsion)

F. Wang

(OPPO)

2.4a

Additional spatial adjacent candidates

C. Wang

(OPPO)

2.4b

Modified temporal collocated candidates

C. Wang

(OPPO)

2.4c

Number of pairwise-average candidates

C. Wang

(OPPO)

2.4d

Test 2.4a + Test 2.4b + Test 2.4c

C. Wang

(OPPO)

2.5

Pairwise merge candidates with motion vector scaling

S. Hong

(Nokia)

3 Transform and coefficients coding

3.1

Finding optimal simple quantizer borders and reconstruction points

M. Balcilar

(Ofinno)

M. Le Pendu

(InterDigital)

3.2a

Modified coding of a coefficient level in TSRC

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.2b

Test 3.2a with low QPs

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.2c

Test 3.2b with JVET-AN0086 encoding change enabled

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.3a

Modified multiple transform set selection for inter LFNST/NSPT

J. Huo

(Xidian University)

3.3b

Modified Advanced SBT

J. Huo

(Xidian University)

3.3c

Test 3.3a + Test 3.3b

J. Huo

(Xidian University)

4 In-loop filtering

4.1

On improving the bi-filtering modes in TALF

P. Astola

(Nokia)

4.2

ALF coefficient coding group extension

I. Jumakulyyev

(Nokia)

4.3

Modified merge candidate list in ALF-CCCM

H. Zhang

(OPPO)

4.4

Improvement on frame-level inheritance mode in ALF-CCCM

M. Jia

(ZTE)

5 Other

5.1

Independent CTUs for TM-padding

N. Neumann

(Nokia)

JVET-AN2024 Exploration experiment on enhanced compression beyond VVC capability (EE2) [V. Seregin, D. Buğdayci Sansli, J. Chen, R. Chernyak, K. Naser, J. Ström, F. Wang, M. Winken, X. Xiu, K. Zhang (EE coordinators)] (2025-11-10)

An initial draft of this document was reviewed and approved at 1415-1420 on Sunday 12 October.

This round of EE2 tests will include:

Tests

Tester

Cross-checker

1 Intra prediction

1.1

Reference sample generation for intra prediction

T. N. Canh (Dolby)

N. Neumann (Nokia)

1.2

Combined angular- and gradient-PDPC

G. Kulupana

(Nokia)

1.3

Block prediction using the 8-tap cubic interpolation filter in SGPM

J. Lee

(KAU)

J. Lee

(ETRI)

Y. Bai

(ZTE)

1.4

Position-dependent weighted prediction extension

Y. Wang

(ZTE)

S. Blasi

(Nokia)

1.5a

Test the threshold for block size larger than 32

S.Wan

(NWPU)

S. Xie

(ZTE)

1.5b

No reference sample smoothing for all block sizes

S.Wan

(NWPU)

S. Xie

(ZTE)

1.6a

Adding DIMD and MDIP average mode to MPM

W. Niu

(ZTE)

1.6b

MDIP mode modification

W. Niu

(ZTE)

1.6c

Test 1.6a + Test 1.6b

W. Niu

(ZTE)

1.7

Multiple candidate selection for MDIP

L. Wang

(Xidian Univ)

1.8

IntraTMP with DMVR

K. Naser

(InterDigital)

1.9

TMRL angle offset refinement

G. Rath

(InterDigital)

D. Ruiz

(Ofinno)

1.10

CCCM with clipping

L.-C. Xu

(SYSU)

2 Inter prediction

2.1

GPM without blending for screen content

J. Kim

(WILUS)

2.2

On improving adaptive GPM blending

Z. Zhang

(Transsion)

2.3a

Sub-block merge mode availability extension with enlarged block set and without CU size limitation

Y. Liu

(Transsion)

F. Wang

(OPPO)

2.3b

Sub-block merge mode availability extension with enlarged block set and CU size limitation

Y. Liu

(Transsion)

F. Wang

(OPPO)

2.4a

Additional spatial adjacent candidates

C. Wang

(OPPO)

2.4b

Modified temporal collocated candidates

C. Wang

(OPPO)

2.4c

Number of pairwise-average candidates

C. Wang

(OPPO)

2.4d

Test 2.4a + Test 2.4b + Test 2.4c

C. Wang

(OPPO)

2.5

Pairwise merge candidates with motion vector scaling

S. Hong

(Nokia)

3 Transform and coefficients coding

3.1

Finding optimal simple quantizer borders and reconstruction points

M. Balcilar

(Ofinno)

M. Le Pendu

(InterDigital)

3.2a

Modified coding of a coefficient level in TSRC

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.2b

Test 3.2a with low QPs

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.2c

Test 3.2b with JVET-AN0086 encoding change enabled

R. Xu

(Xidian University)

Y. Yu

(OPPO)

3.3a

Modified multiple transform set selection for inter LFNST/NSPT

J. Huo

(Xidian University)

3.3b

Modified Advanced SBT

J. Huo

(Xidian University)

3.3c

Test 3.3a + Test 3.3b

J. Huo

(Xidian University)

4 In-loop filtering

4.1

On improving the bi-filtering modes in TALF

P. Astola

(Nokia)

4.2

ALF coefficient coding group extension

I. Jumakulyyev

(Nokia)

4.3

Modified merge candidate list in ALF-CCCM

H. Zhang

(OPPO)

4.4

Improvement on frame-level inheritance mode in ALF-CCCM

M. Jia

(ZTE)

5 Other

5.1

Independent CTUs for TM-padding

N. Neumann

(Nokia)

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JVET-AN2024-v1.docx
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JVET-AN2024 Exploration experiment on enhanced compression beyond VVC capability (EE2)
(Nokia)
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