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12th Meeting: Macao, October 2018 2018-09-24 17:22
CE4: Test results of CE4.1.11 on line buffer reduction for affine mode
Authors: Minhua Zhou Broadcom
Abstract
This contribution reports test results of CE4.1.11. To avoid the need of a separate line buffer for buffering the control point motion vectors (CPMVs) for affine mode, it was advocated to use the 4-parameter affine motion model, the bottom-left and bottom-right control point motion vectors (CPMVs) to do affine motion data inheritance from a neighboring PU located at the top CTU boundary, regardless whether it uses the 4- or 6-parameter affine motion model. Two tests were carried out. In the first test the vertical position of the bottom-left and bottom-right CPMVs is on the top CTU boundary (test 1); in the second the vertical position of the bottom-left and bottom-right CPMVs is two lines above the top CTU boundary (test 2). Compared to the VTM2.0.1 anchor, the BD-rate differences are 0.09% in RA, 0.00% in LD_B and 0.02% in LD_P for test 1, and 0.12% in RA, 0.01% in LD_B and 0.04% in LD_P for test 2, respectively. For 4K video for example, the proposed changes reduce the line buffer requirement for the affine mode from 9,216 bytes to 256 bytes.
Meeting Notes
JVET-L0045 CE4: Test results of CE4.1.11 on line buffer reduction for affine mode [M. Zhou (Broadcom)]
References:
JVET-K0052 JVET-K0337 JVET-K1001 JVET-K1010 JVET-K1024
Cited:
JVET-L0024 JVET-L0046 JVET-L0048 JVET-L0364 JVET-L1001 JVET-L1002 JVET-M0002 JVET-M0003 JVET-M0013 JVET-M0082 JVET-M0086 JVET-M0087 JVET-M0117 JVET-M0162 JVET-M0163 JVET-M0164 JVET-M0165 JVET-M0168 JVET-M0170 JVET-M0171 more than 20
ARCHIVE v1 :
JVET-L0045-v1.docx JVET-L0045-v1.pdf vtm-2.0.1_vs_CE4.1.11_location1_tester.XLSM vtm-2.0.1_vs_CE4.1.11_location2_tester.XLSM
Decisions
JVET-L0045 CE4: Test results of CE4.1.11 on line buffer reduction for affine mode [M. Zhou (Broadcom)]
Citation