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Renjie Chang

Short name: R. Chang

renjiechang@tencent.com Tencent 77 document(s)
Affiliations
Tencent 2021-07-07 - 2025-04-04
Known Emails
Documents
JVET-AQ0014
43rd Meeting: Geneva, July 2026 2026-06-05 14:31
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, A. Karabutov, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice-chairs)

JVET-AP2023
42nd Meeting: Santa Eulària, ES, April 2026 2026-04-30 22:25
Exploration experiment on neural network-based video coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, Y. Li, M. Santamaria, T. Shao, J. Ström, Z. Xi

JVET-AP0023
42nd Meeting: Santa Eulària, ES, April 2026 2026-04-25 01:14
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie (EE coordinators)

JVET-AP0014
42nd Meeting: Santa Eulària, ES, April 2026 2026-04-23 10:49
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, A. Karabutov, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice chairs)

JVET-AO2023
41st Meeting: by teleconference, CH, January 2026 2026-02-10 18:43
Exploration experiment on neural network-based video coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, Y. Li, M. Santamaria, T. Shao, J. Ström, Z. Xie

JVET-AO0023
41st Meeting: by teleconference, CH, January 2026 2026-01-15 13:58
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie (EE coordinators)

JVET-AO0014
41st Meeting: by teleconference, CH, January 2026 2026-01-14 12:40
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, A. Karabutov, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice chairs)

JVET-AN2023
40th Meeting: Geneva, CH, October 2025 2025-10-26 16:12
Exploration experiment on neural network-based video coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, Y. Li, M. Santamaria, T. Shao, J. Ström, Z. Xie

JVET-AN0023
40th Meeting: Geneva, CH, October 2025 2025-10-10 08:34
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie (EE coordinators)

JVET-AN0014
40th Meeting: Geneva, CH, October 2025 2025-10-03 14:01
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice chairs)

JVET-AM2023
39th Meeting: Daejeon, KR, June 2025 2025-08-04 11:54
EE1: Exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Y. Li, Y. Li, M. Santamaria, T. Shao, J. Ström, Z. Xie

JVET-AM0023
39th Meeting: Daejeon, KR, June 2025 2025-06-26 12:54
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie (EE coordinators)

JVET-AM0014
39th Meeting: Daejeon, KR, June 2025 2025-06-26 04:41
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice chairs)

JVET-AL2023
39th Meeting: Daejeon, KR, March 2025 2025-04-21 17:16
EE1: Exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie

JVET-AL0023
39th Meeting: Daejeon, KR, March 2025 2025-03-26 19:42
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, J. Ström, Z. Xie (EE coordinators)

JVET-AL0190
39th Meeting: Daejeon, KR, March 2025 2025-03-26 07:06
EE1-3.3 – NNVC-VLOP3 retraining adding BVI-AOM

F. Galpin, Z. Ameur (InterDigital), R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AL0014
39th Meeting: Daejeon, KR, March 2025 2025-03-25 17:14
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Yue Li, Yun Li, M. Santamaria, J. N. Shingala, Z. Xie (vice-chairs)

JVET-AK2023
37th Meeting: Geneva, CH, January 2025 2025-02-07 14:53
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, J. Ström, Z. Xie

JVET-AK0337
37th Meeting: Geneva, CH, January 2025 2025-01-21 08:26
Report on NN-ILF interface for ECM

D. Rusanovskyy, Y. Li, M. Karczewicz (Qualcomm), F. Galpin (InterDigital), J. Ström (Ericsson), J. Li, Y. Li (Bytedance), R. Chang (Tencent)

JVET-AK0023
37th Meeting: Geneva, CH, January 2025 2025-01-18 13:18
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, R. Chang, Z. Xie (EE coordinators)

JVET-AK0014
37th Meeting: Geneva, CH, January 2025 2025-01-13 17:02
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Y. Li, Y. Li, M. Santamaria, J. N. Shingala, Z. Xie (vice-chairs)

JVET-AJ2023
36th Meeting: Kemer, TR, November 2024 2024-12-12 09:53
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, Z. Xie

JVET-AJ0023
36th Meeting: Kemer, TR, November 2024 2024-11-01 19:38
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, R. Chang, Z. Xie (EE coordinators)

JVET-AJ0014
36th Meeting: Kemer, TR, November 2024 2024-11-01 07:10
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Y. Li, Y. Li, M. Santamaria, J. N. Shingala, Z. Xie (vice-chairs)

JVET-AI2023
35th Meeting: Sapporo, JP, July 2024 2024-08-09 18:30
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, Z. Xie

JVET-AI0325
35th Meeting: Sapporo, JP, July 2024 2024-07-13 10:00
Crosscheck of JVET-AI0079 (Improved OBIC with PDP)

R. Chang (Tencent)

JVET-AI0014
35th Meeting: Sapporo, JP, July 2024 2024-07-12 05:07
JVET AHG report: NNVC software development (AHG14)

F. Galpin (chair), R. Chang, Y. Li, Y. Li, J. N. Shingala, Z. Xie (vice-chairs)

JVET-AI0023
35th Meeting: Sapporo, JP, July 2024 2024-07-12 04:45
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, R. Chang, Z. Xie (EE coordinators)

JVET-AH2023
34th Meeting: Rennes, FR, April 2024 2024-05-21 12:01
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, F. Galpin, R. Chang, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, Z. Xie

JVET-AH0278
34th Meeting: Rennes, FR, April 2024 2024-04-23 14:06
Crosscheck of JVET-AH0205 (EE1-2.3: Integer implementation of HOP In-loop filter with Transformer blocks and Attention blocks)

R. Chang (Tencent)

JVET-AH0277
34th Meeting: Rennes, FR, April 2024 2024-04-22 14:58
Crosscheck of JVET-AH0080 (EE1-1.2: Joint LOP model with inputs transformed)

R. Chang (Tencent)

JVET-AH0323
34th Meeting: Rennes, FR, April 2024 2024-04-18 20:29
Crosscheck of JVET-AH0071 (EE2-related: IntraTMP extension to TIMD)

R. Chang (Tencent)

JVET-AH0023
34th Meeting: Rennes, FR, April 2024 2024-04-18 17:27
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, R. Chang, Z. Xie

JVET-AH0188
34th Meeting: Rennes, FR, April 2024 2024-04-17 18:05
EE1-2.1: HOP separate models

Y. Li, C. Lin, J. Li, K. Zhang, L. Zhang (Bytedance), F. Galpin (InterDigital), D. Rusanovskyy (Qualcomm), R. Chang (Tencent)

JVET-AG2023
33rd Meeting: by teleconference, CH, January 2024 2024-02-13 12:30
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, F. Galpin, R. Chang, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, Z. Xie

JVET-AG0023
33rd Meeting: by teleconference, CH, January 2024 2024-01-17 08:27
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, R. Chang, Z. Xie (EE coordinators)

JVET-AG0174
33rd Meeting: by teleconference, CH, January 2024 2024-01-17 06:50
EE1-1.1: Report on training with HOP architecture change for EE1-0 (variant 1)

Y. Li, C. Lin, J. Li, K. Zhang, L. Zhang (Bytedance), D. Rusanovskyy, Y. Li, M. Karczewicz (Qualcomm), R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AG0056
33rd Meeting: by teleconference, CH, January 2024 2024-01-17 06:44
EE1-1.4: Joint design of rotation and flipping on NNLF

Z. Xie, Y. Yu, H. Yu, D. Wang(OPPO), R. Chang, L. Wang, X. Xu, S. Liu(Tencent)

JVET-AG0175
33rd Meeting: by teleconference, CH, January 2024 2024-01-10 21:25
EE1-1.3: Separate models for HOP filter

Y. Li, C. Lin, J. Li, K. Zhang, L. Zhang (Bytedance), F. Galpin (InterDigital), D. Rusanovskyy (Qualcomm), R. Chang (Tencent)

JVET-AF2023
32nd Meeting: Hannover, DE, October 2023 2023-11-06 14:42
Exploration Experiments on Neural Network-based Video Coding (EE1)

E. Alshina, R. Chang, F. Galpin, Y. Li, D. Rusanovskyy, M. Santamaria, J. Ström, Z. Xie

JVET-AF0193
32nd Meeting: Hannover, DE, October 2023 2023-10-16 13:37
AHG11: Decoder complexity optimization for NNVC in-loop filter

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AF0043
32nd Meeting: Hannover, DE, October 2023 2023-10-13 23:31
AhG11/EE1: Status of the joint EE1-0 (LOP.2) training

D. Rusanovskyy, Y. Li (Qualcomm), T. Shao, P. Yin, S. McCarthy(Dolby), J. N. Shingala, A. Shyam, A. Suneja, S. P. Badya (Ittiam), J. Li, Y. Li, C. Lin, K. Zhang, L. Zhang (Bytedance), R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AF0272
32nd Meeting: Hannover, DE, October 2023 2023-10-13 15:56
Crosscheck of JVET-AF0086 (EE1-1.2.6: On flipping of input and output of model in NNVC HOP filter)

R. Chang (Tencent)

JVET-AF0154
32nd Meeting: Hannover, DE, October 2023 2023-10-13 15:27
EE1-1.2.3: Input and output rotation of model for NNVC in-loop filter

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AF0192
32nd Meeting: Hannover, DE, October 2023 2023-10-11 04:41
EE1-1.1.5: Combination test of EE1-1.1.1 and EE1-1.1.2

R. Chang, L. Wang, X. Xu, S. Liu (Tencent), D. Rusanovskyy, Y. Li, M. Karczewicz (Qualcomm)

JVET-AF0153
32nd Meeting: Hannover, DE, October 2023 2023-10-06 23:58
EE1-1.1.1: Optimization for complexity-performance trade-off of HOP network

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AF0041
32nd Meeting: Hannover, DE, October 2023 2023-09-01 09:27
AhG11: HOP full results

F. Galpin (InterDigital), D. Rusanovskyy, Y. Li (Qualcomm), Y. Li, J. Li (ByteDance), L. Wang, R. Chang (Tencent), Z. Xie (OPPO), E. Alshina (Huawei)

JVET-AE0289
31st Meeting: Geneva, CH, July 2023 2023-07-26 17:52
AhG11: HOP training process and models

F. Galpin (InterDigital), S. Eadie, D. Rusanovskyy, Y. Li (Qualcomm), Y. Li, J. Li (ByteDance), L. Wang, R. Chang (Tencent), Z. Xie (Oppo), E. Alshina (Huawei)

JVET-AE0191
31st Meeting: Geneva, CH, July 2023 2023-07-25 17:57
AhG11: EE1-0 High Operation Point model

F. Galpin (InterDigital), S. Eadie, D. Rusanovskyy, Y. Li (Qualcomm), Y. Li, J. Li (ByteDance), L. Wang, R. Chang (Tencent), Z. Xie (OPPO), E. Alshina (Huawei)

JVET-AE0162
31st Meeting: Geneva, CH, July 2023 2023-07-13 16:34
AHG11/AHG14: Fix MS-SSIM calculation for SR

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AE0161
31st Meeting: Geneva, CH, July 2023 2023-07-13 15:01
AHG11: Input and output rotation of model for NNVC in-loop filter

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AE0160
31st Meeting: Geneva, CH, July 2023 2023-07-13 08:45
EE1-1.5: Optimization for complexity-performance trade-off of HOP network

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AD0167
30th Meeting: Antalya, TR, April 2023 2023-04-24 09:43
EE1-1.7-related: Combination test for NNVC based on filter set 0

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AD0379
30th Meeting: Antalya, TR, April 2023 2023-04-23 16:53
AHG11: Unified NNLF solution for high operation point

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AD0340
30th Meeting: Antalya, TR, April 2023 2023-04-21 04:29
Crosscheck of JVET-AD0070 (EE1-1.9: Improvement over multi-frame model for NNVC filter set1)

R. Chang (Tencent)

JVET-AD0334
30th Meeting: Antalya, TR, April 2023 2023-04-20 18:20
Crosscheck of JVET-AD0069 (EE1-1.8: On flipping of input and output of model in NNVC filter set0)

R. Chang (Tencent)

JVET-AD0333
30th Meeting: Antalya, TR, April 2023 2023-04-20 17:56
Crosscheck of JVET-AD0068 (EE1-1.2: On adjustment of residual for NNLF)

R. Chang (Tencent)

JVET-AD0166
30th Meeting: Antalya, TR, April 2023 2023-04-20 16:27
EE1-1.7: Optimization of training and network for NNVC filter set 0

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AC0328
29th Meeting: by teleconference, DE, January 2023 2023-01-17 21:18
EE1-related: Combination of EE1-1.1 and EE1-1.2

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AC0273
29th Meeting: by teleconference, DE, January 2023 2023-01-16 13:15
Crosscheck of JVET-AC0089 (EE1-1.5: Combined intra and inter models for luma and chroma)

R. Chang (Tencent)

JVET-AC0197
29th Meeting: by teleconference, DE, January 2023 2023-01-14 00:26
EE1-1.1-related: More refinements on NN based in-loop filter

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AC0195
29th Meeting: by teleconference, DE, January 2023 2023-01-12 17:45
EE1-1.2: encoder-only optimization for NN based in-loop filter with a single model

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AC0304
29th Meeting: by teleconference, DE, January 2023 2023-01-12 16:25
Crosscheck of JVET-AC0066 (EE1-related: Improvement on EE1-1.7)

R. Chang (Tencent)

JVET-AC0303
29th Meeting: by teleconference, DE, January 2023 2023-01-12 16:25
Crosscheck of JVET-AC0065 (Non-EE1: On flipping of input and output of model in NNVC filter set 0)

R. Chang (Tencent)

JVET-AC0272
29th Meeting: by teleconference, DE, January 2023 2023-01-11 03:30
Crosscheck of JVET-AC0064 (EE1-1.4: On adjustment of residual for NNLF)

R. Chang (Tencent)

JVET-AC0271
29th Meeting: by teleconference, DE, January 2023 2023-01-11 03:29
Crosscheck of JVET-AC0063 (EE1-1.3: On chroma order adjustment in NNLF)

R. Chang (Tencent)

JVET-AC0196
29th Meeting: by teleconference, DE, January 2023 2023-01-10 09:56
EE1-2.2: GOP Level Adaptive Resampling with CNN-based Super Resolution

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AC0194
29th Meeting: by teleconference, DE, January 2023 2023-01-05 04:53
EE1-1.1: More refinements on NN based in-loop filter with a single model

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AB0098
28th Meeting: Mainz, DE, October 2022 2022-10-23 13:52
EE1-2.3 related: GOP Level Adaptive Resampling with CNN-based Super Resolution

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AB0106
28th Meeting: Mainz, DE, October 2022 2022-10-20 09:54
Crosscheck of JVET-AB0077 (EE1-2.2: CNN Filter for Super-Resolution with RPR functionality in VVC)

R. Chang (Tencent)

JVET-AB0105
28th Meeting: Mainz, DE, October 2022 2022-10-20 09:53
Crosscheck of JVET-AB0076 (EE1-2.1: RPR-Based Super-Resolution Guided by Partition Information)

R. Chang (Tencent)

JVET-AB0084
28th Meeting: Mainz, DE, October 2022 2022-10-19 14:03
EE1-2.3：A CNN-based Super Resolution Method with GOP Level Adaptive Resolution

R. Chang, L. Wang, X. Xu, S. Liu (Tencent), J. Nam, S. Yoo, J. Lim, S. Kim (LGE)

JVET-AA0084
27th Meeting: by teleconference, July 2022 2022-07-14 05:58
AHG11: Neural Network based Super Resolution for Video Coding Using Multiple Side Information

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-AA0085
27th Meeting: by teleconference, July 2022 2022-07-12 14:36
EE1-1.1: The Performance of Single-Model Filter Trained on the VTM and ECM Reconstruction

R. Chang, L. Wang, X. Xu, S. Liu (Tencent)

JVET-Z0093
26th Meeting: by teleconference, April 2022 2022-04-22 01:11
EE1-related: The performance of EE1 Test 1.1 and Test 1.2 on ECM-4.0

R. Chang, L. Wang, X. Xu, S. Liu (Tencent), F. Galpin (InterDigital)

JVET-W0111
23rd Meeting: by teleconference, July 2021 2021-07-12 17:46
AHG11: neural network based cross-component prediction model

L. Wang, S. Lin, R. Chang, X. Xu, S. Liu (Tencent)

JVET-AQ0023
43rd Meeting: Geneva, July 2026
EE1: Summary report of exploration experiment on neural network-based video coding

E. Alshina, R. Chang, F. Galpin, Yue Li, Yun Li, M. Santamaria, T. Shao, J. Ström, Z. Xie (EE coordinators)