Back to Search
Document details
AHG8/CE1-related: Signalling filter coefficients for resampling
Abstract
In VVC draft 6, reference picture resampling process uses existed motion compensation filters. In CE1, depending on the scaling ratio alternative fixed filter coefficients for reference picture downsampling are tested.
JVET-P0593 AHG8/CE1-related: Signalling filter coefficients for resampling [V. Seregin, M. Coban, M. Karczewicz (Qualcomm)]
In VVC draft 6, reference picture resampling process uses existed motion compensation filters. In CE1, depending on the scaling ratio alternative fixed filter coefficients for reference picture downsampling are tested.
In this contribution, it is proposed to signal filter coefficients in APS for luma and chroma components that are used for downsampling. In slice header, an APS index is signalled to indicate which filter coefficients set is applied for downsampling. This allows to specify the desired coefficients per picture, which can be scaling ratio dependent.
It was commented that there is definitely a complexity increase (and possibly dynamic range issues) for having downloadable filters.
Cited:
PATENTS:
US11095916B2
1.00
2021-08-17
US11563933B2
0.34
2023-01-24
US11659201B2
0.32
2023-05-23
US11233988B2
0.30
2022-01-25
CA2910969C
0.28
2017-10-17
US11490099B2
0.24
2022-11-01
ES2960283T3
0.22
2024-03-04
EP3132604B1
0.20
2020-04-08
Decisions
It was commented that there is definitely a complexity increase (and possibly dynamic range issues) for having downloadable filters.
Citation