Search Results for "JVET-R0293"
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JVET-R0293 Fixes for 6-tap interpolation filtering for affine motion compensation [K. Andersson, R. Yu, Z. Zhang, J. Ström (Ericsson)]
It is asserted that the some of the current 6-tap interpolation filters for affine motion compensation have significant phase misalignments compared to the expected phases of the interpolation filters. This contribution proposes modifications of the filters for the fractional positions 4/16, 5/16, 6/16, 10/16, 11/16 and 12/16, and it is claimed that this fixes the phase misalignments of the current filters.
The modifications were reported to be tested under VTM-8.0 CTC. The impact on coding efficiency is reported to be -0.01%/-0.09% for RA/LDB. The modifications were reported to also be tested for the non-CTC) affine test set which was used to determine the performance of proposals in the past affine CEs. The impact on coding efficiency on that test set is reported to be -0.20% for RA.Presented Fri 17 April
It is mentioned that phase is less important in motion comp, amplitude/energy preservation more important. It is also mentioned that even the 8-tap filters are not optimum in phase. New results in v4 include the energy gain, which show that it is slightly lower for 6/16 filter than for the current filter, whereas for the other two (4/16 and 5/16) it is slightly higher.
It was also asked if the visual effect of the filters was investigated. The proponent says that no difference was visible.
No action (see further notes under JVET-R0292).
JVET-R0475 Crosscheck of JVET-R0293 (Fixes for 6-tap interpolation filtering for affine motion compensation) [M. Winken (HHI)] [late]
JVET-R2016 Summary information on BD-rate experiment evaluation practices [K. Andersson, F. Bossen, J.-R. Ohm, A. Segall, R. Sjöberg, J. Ström, G. J. Sullivan, A. Tourapis] (2020-05-15)
Minor refinements of the description were planned.
Future meeting plans, expressions of thanks, and closing of the meeting
Future meeting plans were established according to the following guidelines:
- Meeting under ITU-T SG 16 auspices when it meets (ordinarily starting meetings on the Tuesday of the first week and closing it on the Wednesday of the second week of the SG 16 meeting – a total of 9 meeting days), and
- Otherwise meeting under ISO/IEC JTC 1/SC 29/WG 11 auspices when it meets (ordinarily starting meetings on the Wednesday prior to such meetings and closing it at lunchtime on the last day of the WG 11 meeting – a total of 9.5 meeting days).
In cases where an exceptionally high workload is expected for a meeting, an earlier starting date may be defined.
Some specific future meeting plans (to be confirmed) were established as follows:
- Mon. 22 June – Wed. 1 July 2020, 19th meeting under ITU-T auspices conducted by teleconference.
- Wed. 7 – Fri. 16 October 2020, 20th meeting under WG 11 auspices in Rennes, FR.
- Wed. 6 – Fri. 15 January 2021, 21st meeting under WG 11 auspices in Capetown, ZA.
- Tue. 20 – Wed. 28 April 2021, 22nd meeting under ITU-T auspices in Geneva, CH.
The agreed document deadline for the 19th JVET meeting was planned to be Wednesday 10 June 2020 (earlier than usual).
Vittorio Baroncini, Andrew Segall, Mathias Wien, and Yan Ye were thanked for their efforts in further...
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