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11th Meeting: Ljubljana, July 2018 2018-07-18 14:25
Draft text for affine motion compensation
Authors: Hyeong-Gyun Yang Huawei Huanbang Chen Huawei Yin Zhao Huawei Jie Chen Huawei
Abstract
Draft text for affine motion compensation on top of JVET-J1001 is provided.
Meeting Notes
JVET-K0565 Draft text for affine motion compensation [H. Yang, H. Chen, Y. Zhao, J. Chen (Huawei)] [late]

Draft text was provided and reviewed Tue 17 1545.

Suggestions made during discussion:

  • High level enabling flag at SPS as already in software is missing (PPS or slice needs further consideration)
  • Put into SPS 2 flags (1 for affine enabling, 1 for 6-parameter enabling)
  • All affine operations and syntax should be disabled by the first flag
  • All affine operations and syntax related to 6-parameter should be disabled by the second flag

It was generally remarked that the text was appropriate and complete, but needs more detailed investigation in the context of integration by editors.

For editors of draft text:

  • Some alignment of subblock syntax with ATMVP would be necessary
  • An implication of adopting affine and ATMVP requires also transferring some additional elements from HEVC, such as merge, MV prediction, MV difference coding
  • What is further needed for affine, is the 1/16 sample precision interpolation filters. Otherwise, the MC process of HEVC can be retained for subblocks. Rounding to 1/4 pel also needs to be described

8x8 MV compression requires action. Storage to be done with high (1/16 pel) precision. Note: It should be further studied whether high precision is necessary.

References:
JVET-J1001
Cited:
JVET-K1001 JVET-L0002 JVET-L0085 JVET-L0092 JVET-L0093 JVET-L0096 JVET-L0097 JVET-L0114 JVET-L0124 JVET-L0219 JVET-L0255 JVET-L0340 JVET-L0428 JVET-L0450 JVET-L0564 JVET-L0694 JVET-L1001 JVET-M0082 JVET-M0086 JVET-M0087 more than 20
PATENTS:
AU2023237109B2 0.34 2025-09-04 CN111416976A 0.32 2020-07-14 CN121284269A 0.30 2026-01-06 US12395670B2 0.28 2025-08-19 US11706417B2 0.26 2023-07-18 CN118945378A 0.24 2024-11-12 US20250030839A1 0.22 2025-01-23 EP3932054B1 0.20 2024-04-24
ARCHIVE v2 :
JVET-K0565_r1.docx
Decisions
8x8 MV compression requires action. Storage to be done with high (1/16 pel) precision. Note: It should be further studied whether high precision is necessary.
Citation