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CE4: Symmetrical MVD mode (Test 4.4.3)
Abstract
This contribution presents the simulation results of symmetrical MVD mode for bi-prediction on top of VTM-3.0. The proposed method derives MVD for the list 1 from MVD for the list 0 based on assumption of linear motion. Simulation results reportedly shows on average 0.16% BD-rate saving with encoding and decoding times of 105% and 100% respectively for the RA configuration.
JVET-M0481 CE4: Symmetrical MVD mode (Test 4.4.3) [H. Chen, T. Solovyev, H. Yang, J. Chen (Huawei)]
In slice level, variables BiDirPredFlag, RefIdxSymL0 and RefIdxSymL1 are derived by searching the reference pictures in List 0 and List 1.
In CU level, a symmetrical mode flag indicating whether symmetrical mode is used or not is explicitly signalled if the prediction direction for the CU is bi-prediction and BiDirPredFlag is equal to 1.
When the flag is true, only mvp_l0_flag, mvp_l1_flag and MVD0 are explicitly signalled. The reference indices are set equal to RefIdxSymL0, RefIdxSymL1 for list 0 and list 1, respectively. MVD1 is just set equal to –MVD0. The final motion vectors are shown in below formula.
CE5: Arithmetic coding engine (10)
Contributions in this category were discussed Thursday 10 January 1700–2030 (in Track A chaired by Y. Ye).
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Contributions in this category were discussed Thursday 10 January 1700–2030 (in Track A chaired by Y. Ye).
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