Search Results for "JVET-P0400"
Found 8 document(s)
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JVET-P0400 AhG16/Non-CE8: Removal of shared merge list [Y. Wang, L. Zhang, H. Liu, K. Zhang, J. Xu, Y. Wang (Bytedance)]
This contribution proposes to increase the MV throughput of small blocks with IBC enabled. In the proposed method, the shared merge list is removed, and the derivation of spatial merge candidates for 4×4 blocks is skipped. Therefore, the pruning operations among BV candidates are totally removed. Additionally, updating of HMVP tables for certain block sizes (no greater than 16) is skipped as well. It is asserted that the proposed method could further reduce the complexity and increase the MV throughput. Simulation results reportedly show that BD-rate changes are {0.01%, -0.01%, -0.03%} and {0.06%, 0.02%, -0.11%} in {AI, RA, LDB} configurations for class F and class TGM, respectively.
HMVP table is never updated for case of 4x4 blocks. In the hypothetical case of only 4x4 blocks, the HMVP table would never be filled. This is no problem at the decoder; an encoder typically would not choose such a case.
The proposal simplifies the specification by removing the processes related to shared merge list. It is however introducing another condition of checking for larger block size in various steps of the merge list construction. It is argued that this would enforce duplicating the entire merge list construction logic, where the argument behind that is not fully clear.
It is agreed that this is a clear simplification which does not have significant impact on performance.
Confirmed by cros-checkers.
Decision: Adopt JVET-P0400.
JVET-P0662 Crosscheck of JVET-P0400 (AhG16/Non-CE8: Removal of shared merge list) [J. Chen (Alibaba)]
JVET-S0013 JVET AHG report: Tool reporting procedure and testing (AHG13) [W.-J. Chien, J. Boyce, Y.-W. Chen, R. Chernyak, K. Choi, R. Hashimoto, Y.-W. Huang, H. Jang, R.-L. Liao, S. Liu]
This document summarizes the activity of AHG13: “Tool reporting procedure” between the 18th meeting by teleconference (15–24 April 2020) and the 19th Meeting by teleconference (22 June – 1 July 2020). Tool on/off experimental results vs. VTM anchor are provided for the tools specified in JVET-R2005.
The initial version of JVET-R2005 “Methodology and reporting template for tool testing” was provided on May 16th.
All tests described in JVET-R2005 were conducted. VTM tool tests were conducted on VTM-9.0 software with VTM configuration by switching off or on specific tool either in configuration files or macros.
Tools included in VTM (Tool off test vs VTM Anchor)
List of adoptions included in VTM (Tool off test (unless specified) vs VTM anchor)
Acronym | Document reference(s) | AI | RA | LD | Tester | Crosscheck | |
Chroma separate tree | CST | JVET-P0063, JVET-P0406 | X | X | X | Tzu-Der Chuang (peter.chuang@mediatek.com) | Wei-Jung Chien (wchien@qti.qualcomm.com) |
Dependent quantization* | DQ | JVET-P0170, JVET-Q0433 | X | X | X | Tzu-Der Chuang (peter.chuang@mediatek.com) | Shan Liu (shanl; xinzzhao@ tencent.com) |
Cross-component linear model | CCLM | JVET-O1124, JVET-Q0500, JVET-Q0194 | X | X | X | Roman Chernyak (chernyak.roman@huawei.com) | Shan Liu (shanl; leolzhao@ tencent.com) |
multiple transform set | MTS | JVET-O0294, JVET-O0474, JVET-O0541, JVET-Q0055, JVET-Q0516 | X | X | X | Kiho Choi (kiho14.choi@samsung.com) | Shan Liu (shanl; xinzzhao@ tencent.com) |
Adaptive loop filter | ALF | JVET-P016... |
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