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11th Meeting: Ljubljana, July 2018 2018-07-03 11:47
CE2-related: Additional results for CE2.4.1.4 with chroma filter shape aligned with luma
Authors: Nan Hu Qualcomm Vadim Seregin Qualcomm N. Shlyakhov Qualcomm Marta Karczewicz Qualcomm
Abstract
This contribution presents additional test results for CE2 test 4.1.4 where ALF filter shape for chroma is aligned with luma component. In the BMS ALF, luma filter can be switched between 5x5, 7x7, or 9x9 filter shapes, while chroma filter size is always 5x5. The same flexible filter structure for chroma is tested in this contribution. For maximum ALF filter shape size 9x9, test results reportedly show 3.26%, 5.34%, and 4.63% luma gain in AI, RA, and LB configurations respectively over VTM-1.0 anchor.
Meeting Notes
JVET-K0372 CE2-related: Additional results for CE2.4.1.4 with chroma filter shape aligned with luma [N. Hu, V. Seregin, N. Shlyakhov, M. Karczewicz (Qualcomm)]

This contribution presents additional test results for CE2 test 4.1.4 where ALF filter shape for chroma is aligned with luma component. In the BMS ALF, luma filter can be switched between 5x5, 7x7, or 9x9 filter shapes, while chroma filter size is always 5x5. The same flexible filter structure for chroma is tested in this contribution. For maximum ALF filter shape size 9x9, test results reportedly show 3.26%, 5.34%, and 4.63% luma gain in AI, RA, and LB configurations respectively over VTM-1.0 anchor.

A relevant slide deck is available in JVET-K0371.

This was considered somewhat obsolete after the decision on inclusion of another ALF version in the VTM.

Cited:
JVET-K0022 JVET-K0373 JVET-K0479 X
ARCHIVE v1 :
JVET-K0372.docx VTM1.0_CE2.4.1.4_ALF_Filter7x7_Classifier2x2_Chroma5x5_7x7.xlsm VTM1.0_CE2.4.1.4_ALF_Filter7x7_Classifier4x4_Chroma5x5_7x7.xlsm VTM1.0_CE2.4.1.4_ALF_Filter9x9_Classifier2x2_Chroma5x5_7x7_9x9.xlsm VTM1.0_CE2.4.1.4_ALF_Filter9x9_Classifier4x4_Chroma5x5_7x7_9x9.xlsm
Decisions
This was considered somewhat obsolete after the decision on inclusion of another ALF version in the VTM.
Citation