Back to Search
Document details
CE4: Symmetrical mode for bi-prediction (Test 3.2)
Abstract
This contribution reports the results of integrating symmetrical mode for bi-prediction in JVET-J0063 to BMS1.0. The proposed mode derives the reference index and MVD for the list 0 based on the assumption of linear motion. Simulation results reportedly shows on average 0.84% BD-rate saving with 5% encoding time for RA configuration over VTM-1.0, and 0.15% BD-rate saving with 2% encoding time for RA configuration over BMS-1.0.
JVET-K0188 CE4: Symmetrical mode for bi-prediction (Test 3.2) [H. Chen, H. Yang, J. Chen (Huawei)]
In this contribution, a mode is proposed for motion information coding in bi-prediction. A symmetrical mode flag indicating whether symmetrical mode is used or not is explicitly signalled if the prediction direction is bi-prediction. When the flag is true, the reference index and MVD for list 0 are derived from motion information of list 1. More ever, the reference index of list 1 is inferred as 0 for this mode.
Key points
- A symmetrical mode flag is explicitly signalled for each CU in inter bi-prediction mode
- Ref_idx in L1 is enforced to be 0, Ref_idx in L1 is inferred to be symmetrical of L0 reference
- MVD in L0 is mirrored from MVD in L1
References:
Cited:
Decisions
MVD in L0 is mirrored from MVD in L1
Citation