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18th Meeting: Teleconference, April 2020 2020-04-20 14:48
AHG 10: ALF and CCALF encoder parallel design
Authors: Xuewei Meng PKU Xiaozhen Zheng DJI S.S. Wang PKU S.W. Ma PKU
Abstract
In this contribution, ALF and CCALF encoder parallel design is proposed. Chroma signal before ALF is used to replace the current reconstructed chroma signal after ALF in CCALF parameter training process. With the proposed method, CCALF parameter training and ALF process can be parallel. The coding performance in VTM-8.0 is as follows,
Meeting Notes
JVET-R0328 AHG 10: ALF and CCALF encoder parallel design [X.W. Meng (PKU), X. Zheng (DJI), S.S. Wang, S.W. Ma (PKU)]

In this contribution, ALF and CCALF encoder parallel design is proposed. Chroma signal before ALF is used to replace the current reconstructed chroma signal after ALF in CCALF parameter training process. With the proposed method, CCALF parameter training and ALF process can be parallel. The coding performance in VTM-8.0 is as follows,

AI: 0.00% 0.16% 0.19%

RA: 0.00% 0.23% 0.20%

LDB: -0.04% 0.13% 0.04%

The benefit of parallel implementation would mainly be relevant for real-time encoding. For reference software, this option would not be so important, and there is also some (minor) loss in chroma.

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References:
JVET-N1010 JVET-Q0795 JVET-Q2001
Cited:
JVET-R0465 X
PATENTS:
TWI846132B 0.76 2024-06-21 US20230051066A1 0.34 2023-02-16 US12095988B2 0.32 2024-09-17 CN115604466A 0.30 2023-01-13 CN119404511A 0.28 2025-02-07 EP4162681A1 0.26 2023-04-12 AU9824698A 0.24 1999-03-04 AU2006218359A1 0.22 2006-09-08
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